diff --git a/Cargo.lock b/Cargo.lock index 871d46ea8449..f881856354b8 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -3178,7 +3178,6 @@ dependencies = [ "pallet-balances", "pallet-collator-selection", "pallet-contracts", - "pallet-contracts-primitives", "pallet-insecure-randomness-collective-flip", "pallet-message-queue", "pallet-multisig", @@ -7217,7 +7216,6 @@ dependencies = [ "pallet-child-bounties", "pallet-collective", "pallet-contracts", - "pallet-contracts-primitives", "pallet-conviction-voting", "pallet-core-fellowship", "pallet-democracy", @@ -8854,7 +8852,7 @@ dependencies = [ "itertools 0.10.5", "tar", "tempfile", - "toml_edit", + "toml_edit 0.19.14", ] [[package]] @@ -9769,8 +9767,8 @@ dependencies = [ "pallet-assets", "pallet-balances", "pallet-contracts-fixtures", - "pallet-contracts-primitives", "pallet-contracts-proc-macro", + "pallet-contracts-uapi", "pallet-insecure-randomness-collective-flip", "pallet-message-queue", "pallet-proxy", @@ -9801,11 +9799,21 @@ dependencies = [ name = "pallet-contracts-fixtures" version = "1.0.0" dependencies = [ + "anyhow", + "cfg-if", "frame-system", + "parity-wasm", "sp-runtime", + "tempfile", + "toml 0.8.8", + "twox-hash", "wat", ] +[[package]] +name = "pallet-contracts-fixtures-common" +version = "1.0.0" + [[package]] name = "pallet-contracts-mock-network" version = "1.0.0" @@ -9817,8 +9825,8 @@ dependencies = [ "pallet-balances", "pallet-contracts", "pallet-contracts-fixtures", - "pallet-contracts-primitives", "pallet-contracts-proc-macro", + "pallet-contracts-uapi", "pallet-insecure-randomness-collective-flip", "pallet-message-queue", "pallet-proxy", @@ -9844,18 +9852,6 @@ dependencies = [ "xcm-simulator", ] -[[package]] -name = "pallet-contracts-primitives" -version = "24.0.0" -dependencies = [ - "bitflags 1.3.2", - "parity-scale-codec", - "scale-info", - "sp-runtime", - "sp-std 8.0.0", - "sp-weights", -] - [[package]] name = "pallet-contracts-proc-macro" version = "4.0.0-dev" @@ -9865,6 +9861,16 @@ dependencies = [ "syn 2.0.38", ] +[[package]] +name = "pallet-contracts-uapi" +version = "4.0.0-dev" +dependencies = [ + "bitflags 1.3.2", + "parity-scale-codec", + "paste", + "scale-info", +] + [[package]] name = "pallet-conviction-voting" version = "4.0.0-dev" @@ -13810,7 +13816,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "7f4c021e1093a56626774e81216a4ce732a735e5bad4868a03f3ed65ca0c3919" dependencies = [ "once_cell", - "toml_edit", + "toml_edit 0.19.14", ] [[package]] @@ -14273,6 +14279,15 @@ dependencies = [ "bitflags 1.3.2", ] +[[package]] +name = "redox_syscall" +version = "0.4.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "4722d768eff46b75989dd134e5c353f0d6296e5aaa3132e776cbdb56be7731aa" +dependencies = [ + "bitflags 1.3.2", +] + [[package]] name = "redox_users" version = "0.4.3" @@ -16795,9 +16810,9 @@ dependencies = [ [[package]] name = "serde_spanned" -version = "0.6.3" +version = "0.6.4" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "96426c9936fd7a0124915f9185ea1d20aa9445cc9821142f0a73bc9207a2e186" +checksum = "12022b835073e5b11e90a14f86838ceb1c8fb0325b72416845c487ac0fa95e80" dependencies = [ "serde", ] @@ -19176,13 +19191,13 @@ checksum = "9d0e916b1148c8e263850e1ebcbd046f333e0683c724876bb0da63ea4373dc8a" [[package]] name = "tempfile" -version = "3.8.0" +version = "3.8.1" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "cb94d2f3cc536af71caac6b6fcebf65860b347e7ce0cc9ebe8f70d3e521054ef" +checksum = "7ef1adac450ad7f4b3c28589471ade84f25f731a7a0fe30d71dfa9f60fd808e5" dependencies = [ "cfg-if", "fastrand 2.0.0", - "redox_syscall 0.3.5", + "redox_syscall 0.4.1", "rustix 0.38.21", "windows-sys 0.48.0", ] @@ -19645,14 +19660,26 @@ dependencies = [ "serde", "serde_spanned", "toml_datetime", - "toml_edit", + "toml_edit 0.19.14", +] + +[[package]] +name = "toml" +version = "0.8.8" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "a1a195ec8c9da26928f773888e0742ca3ca1040c6cd859c919c9f59c1954ab35" +dependencies = [ + "serde", + "serde_spanned", + "toml_datetime", + "toml_edit 0.21.0", ] [[package]] name = "toml_datetime" -version = "0.6.3" +version = "0.6.5" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "7cda73e2f1397b1262d6dfdcef8aafae14d1de7748d66822d3bfeeb6d03e5e4b" +checksum = "3550f4e9685620ac18a50ed434eb3aec30db8ba93b0287467bca5826ea25baf1" dependencies = [ "serde", ] @@ -19670,6 +19697,19 @@ dependencies = [ "winnow", ] +[[package]] +name = "toml_edit" +version = "0.21.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "d34d383cd00a163b4a5b85053df514d45bc330f6de7737edfe0a93311d1eaa03" +dependencies = [ + "indexmap 2.0.0", + "serde", + "serde_spanned", + "toml_datetime", + "winnow", +] + [[package]] name = "tower" version = "0.4.13" diff --git a/Cargo.toml b/Cargo.toml index 6af3ea4c3cb0..b688695076cc 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -290,8 +290,9 @@ members = [ "substrate/frame/collective", "substrate/frame/contracts", "substrate/frame/contracts/fixtures", + "substrate/frame/contracts/fixtures/contracts/common", + "substrate/frame/contracts/uapi", "substrate/frame/contracts/mock-network", - "substrate/frame/contracts/primitives", "substrate/frame/contracts/proc-macro", "substrate/frame/conviction-voting", "substrate/frame/core-fellowship", diff --git a/cumulus/parachains/runtimes/contracts/contracts-rococo/Cargo.toml b/cumulus/parachains/runtimes/contracts/contracts-rococo/Cargo.toml index eded360436b1..f5626a90f364 100644 --- a/cumulus/parachains/runtimes/contracts/contracts-rococo/Cargo.toml +++ b/cumulus/parachains/runtimes/contracts/contracts-rococo/Cargo.toml @@ -52,7 +52,6 @@ pallet-transaction-payment-rpc-runtime-api = { path = "../../../../../substrate/ pallet-utility = { path = "../../../../../substrate/frame/utility", default-features = false} pallet-sudo = { path = "../../../../../substrate/frame/sudo", default-features = false} pallet-contracts = { path = "../../../../../substrate/frame/contracts", default-features = false} -pallet-contracts-primitives = { path = "../../../../../substrate/frame/contracts/primitives", default-features = false} # Polkadot pallet-xcm = { path = "../../../../../polkadot/xcm/pallet-xcm", default-features = false } @@ -102,7 +101,6 @@ std = [ "pallet-authorship/std", "pallet-balances/std", "pallet-collator-selection/std", - "pallet-contracts-primitives/std", "pallet-contracts/std", "pallet-insecure-randomness-collective-flip/std", "pallet-message-queue/std", diff --git a/cumulus/parachains/runtimes/contracts/contracts-rococo/src/lib.rs b/cumulus/parachains/runtimes/contracts/contracts-rococo/src/lib.rs index a7c06103c4aa..77bc93fb9684 100644 --- a/cumulus/parachains/runtimes/contracts/contracts-rococo/src/lib.rs +++ b/cumulus/parachains/runtimes/contracts/contracts-rococo/src/lib.rs @@ -588,7 +588,7 @@ impl_runtime_apis! { gas_limit: Option, storage_deposit_limit: Option, input_data: Vec, - ) -> pallet_contracts_primitives::ContractExecResult { + ) -> pallet_contracts::ContractExecResult { let gas_limit = gas_limit.unwrap_or(RuntimeBlockWeights::get().max_block); Contracts::bare_call( origin, @@ -608,10 +608,10 @@ impl_runtime_apis! { value: Balance, gas_limit: Option, storage_deposit_limit: Option, - code: pallet_contracts_primitives::Code, + code: pallet_contracts::Code, data: Vec, salt: Vec, - ) -> pallet_contracts_primitives::ContractInstantiateResult { + ) -> pallet_contracts::ContractInstantiateResult { let gas_limit = gas_limit.unwrap_or(RuntimeBlockWeights::get().max_block); Contracts::bare_instantiate( origin, @@ -631,7 +631,7 @@ impl_runtime_apis! { code: Vec, storage_deposit_limit: Option, determinism: pallet_contracts::Determinism, - ) -> pallet_contracts_primitives::CodeUploadResult { + ) -> pallet_contracts::CodeUploadResult { Contracts::bare_upload_code( origin, code, @@ -643,7 +643,7 @@ impl_runtime_apis! { fn get_storage( address: AccountId, key: Vec, - ) -> pallet_contracts_primitives::GetStorageResult { + ) -> pallet_contracts::GetStorageResult { Contracts::get_storage(address, key) } } diff --git a/substrate/bin/node/runtime/Cargo.toml b/substrate/bin/node/runtime/Cargo.toml index 2414358b60b4..cb4970e7c9d6 100644 --- a/substrate/bin/node/runtime/Cargo.toml +++ b/substrate/bin/node/runtime/Cargo.toml @@ -74,7 +74,6 @@ pallet-broker = { path = "../../../frame/broker", default-features = false} pallet-child-bounties = { path = "../../../frame/child-bounties", default-features = false} pallet-collective = { path = "../../../frame/collective", default-features = false} pallet-contracts = { path = "../../../frame/contracts", default-features = false} -pallet-contracts-primitives = { path = "../../../frame/contracts/primitives", default-features = false} pallet-conviction-voting = { path = "../../../frame/conviction-voting", default-features = false} pallet-core-fellowship = { path = "../../../frame/core-fellowship", default-features = false} pallet-democracy = { path = "../../../frame/democracy", default-features = false} @@ -171,7 +170,6 @@ std = [ "pallet-broker/std", "pallet-child-bounties/std", "pallet-collective/std", - "pallet-contracts-primitives/std", "pallet-contracts/std", "pallet-conviction-voting/std", "pallet-core-fellowship/std", diff --git a/substrate/bin/node/runtime/src/lib.rs b/substrate/bin/node/runtime/src/lib.rs index d7beb29becf4..e2746b1c35bc 100644 --- a/substrate/bin/node/runtime/src/lib.rs +++ b/substrate/bin/node/runtime/src/lib.rs @@ -2497,7 +2497,7 @@ impl_runtime_apis! { gas_limit: Option, storage_deposit_limit: Option, input_data: Vec, - ) -> pallet_contracts_primitives::ContractExecResult { + ) -> pallet_contracts::ContractExecResult { let gas_limit = gas_limit.unwrap_or(RuntimeBlockWeights::get().max_block); Contracts::bare_call( origin, @@ -2517,10 +2517,10 @@ impl_runtime_apis! { value: Balance, gas_limit: Option, storage_deposit_limit: Option, - code: pallet_contracts_primitives::Code, + code: pallet_contracts::Code, data: Vec, salt: Vec, - ) -> pallet_contracts_primitives::ContractInstantiateResult + ) -> pallet_contracts::ContractInstantiateResult { let gas_limit = gas_limit.unwrap_or(RuntimeBlockWeights::get().max_block); Contracts::bare_instantiate( @@ -2541,7 +2541,7 @@ impl_runtime_apis! { code: Vec, storage_deposit_limit: Option, determinism: pallet_contracts::Determinism, - ) -> pallet_contracts_primitives::CodeUploadResult + ) -> pallet_contracts::CodeUploadResult { Contracts::bare_upload_code( origin, @@ -2554,7 +2554,7 @@ impl_runtime_apis! { fn get_storage( address: AccountId, key: Vec, - ) -> pallet_contracts_primitives::GetStorageResult { + ) -> pallet_contracts::GetStorageResult { Contracts::get_storage( address, key diff --git a/substrate/frame/contracts/Cargo.toml b/substrate/frame/contracts/Cargo.toml index 239b0865e0f0..417f719d803b 100644 --- a/substrate/frame/contracts/Cargo.toml +++ b/substrate/frame/contracts/Cargo.toml @@ -40,7 +40,7 @@ frame-benchmarking = { path = "../benchmarking", default-features = false, optio frame-support = { path = "../support", default-features = false} frame-system = { path = "../system", default-features = false} pallet-balances = { path = "../balances", default-features = false , optional = true} -pallet-contracts-primitives = { path = "primitives", default-features = false} +pallet-contracts-uapi = { path = "uapi" } pallet-contracts-proc-macro = { path = "proc-macro" } sp-api = { path = "../../primitives/api", default-features = false} sp-core = { path = "../../primitives/core", default-features = false} @@ -83,8 +83,6 @@ std = [ "frame-system/std", "log/std", "pallet-balances?/std", - "pallet-contracts-fixtures/std", - "pallet-contracts-primitives/std", "pallet-contracts-proc-macro/full", "pallet-insecure-randomness-collective-flip/std", "pallet-proxy/std", diff --git a/substrate/frame/contracts/build.rs b/substrate/frame/contracts/build.rs index 42bc45d563d3..83d5d368d4bc 100644 --- a/substrate/frame/contracts/build.rs +++ b/substrate/frame/contracts/build.rs @@ -68,6 +68,5 @@ fn main() -> Result<(), Box> { version - 1, )?; - println!("cargo:rerun-if-changed=src/migration"); Ok(()) } diff --git a/substrate/frame/contracts/fixtures/Cargo.toml b/substrate/frame/contracts/fixtures/Cargo.toml index b44f36f2a5fe..257e01e50fa1 100644 --- a/substrate/frame/contracts/fixtures/Cargo.toml +++ b/substrate/frame/contracts/fixtures/Cargo.toml @@ -9,10 +9,16 @@ description = "Fixtures for testing contracts pallet." [dependencies] wat = "1" -frame-system = { path = "../../system", default-features = false} -sp-runtime = { path = "../../../primitives/runtime", default-features = false} +frame-system = { path = "../../system" } +sp-runtime = { path = "../../../primitives/runtime" } +anyhow = "1.0.0" + +[build-dependencies] +parity-wasm = "0.45.0" +tempfile = "3.8.1" +toml = "0.8.8" +twox-hash = "1.6.3" +anyhow = "1.0.0" +cfg-if = { version = "1.0", default-features = false } -[features] -default = [ "std" ] -std = [ "frame-system/std", "sp-runtime/std" ] diff --git a/substrate/frame/contracts/fixtures/build.rs b/substrate/frame/contracts/fixtures/build.rs new file mode 100644 index 000000000000..ada2650c6db5 --- /dev/null +++ b/substrate/frame/contracts/fixtures/build.rs @@ -0,0 +1,277 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: Apache-2.0 + +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +//! Compile contracts to wasm and RISC-V binaries. +use anyhow::Result; +use parity_wasm::elements::{deserialize_file, serialize_to_file, Internal}; +use std::{ + env, fs, + hash::Hasher, + path::{Path, PathBuf}, + process::Command, +}; +use twox_hash::XxHash32; + +/// Read the file at `path` and return its hash as a hex string. +fn file_hash(path: &Path) -> String { + let data = fs::read(path).expect("file exists; qed"); + let mut hasher = XxHash32::default(); + hasher.write(&data); + hasher.write(include_bytes!("build.rs")); + let hash = hasher.finish(); + format!("{:x}", hash) +} + +/// A contract entry. +struct Entry { + /// The path to the contract source file. + path: PathBuf, + /// The hash of the contract source file. + hash: String, +} + +impl Entry { + /// Create a new contract entry from the given path. + fn new(path: PathBuf) -> Self { + let hash = file_hash(&path); + Self { path, hash } + } + + /// Return the path to the contract source file. + fn path(&self) -> &str { + self.path.to_str().expect("path is valid unicode; qed") + } + + /// Return the name of the contract. + fn name(&self) -> &str { + self.path + .file_stem() + .expect("file exits; qed") + .to_str() + .expect("name is valid unicode; qed") + } + + /// Return the name of the output wasm file. + fn out_wasm_filename(&self) -> String { + format!("{}.wasm", self.name()) + } +} + +/// Collect all contract entries from the given source directory. +/// Contracts that have already been compiled are filtered out. +fn collect_entries(contracts_dir: &Path, out_dir: &Path) -> Vec { + fs::read_dir(&contracts_dir) + .expect("src dir exists; qed") + .filter_map(|file| { + let path = file.expect("file exists; qed").path(); + if path.extension().map_or(true, |ext| ext != "rs") { + return None; + } + + let entry = Entry::new(path); + if out_dir.join(&entry.hash).exists() { + None + } else { + Some(entry) + } + }) + .collect::>() +} + +/// Create a `Cargo.toml` to compile the given contract entries. +fn create_cargo_toml<'a>( + fixtures_dir: &Path, + entries: impl Iterator, + output_dir: &Path, +) -> Result<()> { + let uapi_path = fixtures_dir.join("../uapi").canonicalize()?; + let common_path = fixtures_dir.join("./contracts/common").canonicalize()?; + let mut cargo_toml: toml::Value = toml::from_str(&format!( + " +[package] +name = 'contracts' +version = '0.1.0' +edition = '2021' + +# Binary targets are injected below. +[[bin]] + +[dependencies] +uapi = {{ package = 'pallet-contracts-uapi', default-features = false, path = {uapi_path:?}}} +common = {{ package = 'pallet-contracts-fixtures-common', path = {common_path:?}}} + +[profile.release] +opt-level = 3 +lto = true +codegen-units = 1 +" + ))?; + + let binaries = entries + .map(|entry| { + let name = entry.name(); + let path = entry.path(); + toml::Value::Table(toml::toml! { + name = name + path = path + }) + }) + .collect::>(); + + cargo_toml["bin"] = toml::Value::Array(binaries); + let cargo_toml = toml::to_string_pretty(&cargo_toml)?; + fs::write(output_dir.join("Cargo.toml"), cargo_toml).map_err(Into::into) +} + +/// Invoke `cargo fmt` to check that fixtures files are formatted. +fn invoke_cargo_fmt<'a>( + config_path: &Path, + files: impl Iterator, + contract_dir: &Path, +) -> Result<()> { + // If rustfmt is not installed, skip the check. + if !Command::new("rustup") + .args(&["run", "nightly", "rustfmt", "--version"]) + .output() + .expect("failed to execute process") + .status + .success() + { + return Ok(()) + } + + let fmt_res = Command::new("rustup") + .args(&["run", "nightly", "rustfmt", "--check", "--config-path"]) + .arg(config_path) + .args(files) + .output() + .expect("failed to execute process"); + + if fmt_res.status.success() { + return Ok(()) + } + + let stdout = String::from_utf8_lossy(&fmt_res.stdout); + let stderr = String::from_utf8_lossy(&fmt_res.stderr); + eprintln!("{}\n{}", stdout, stderr); + eprintln!( + "Fixtures files are not formatted.\nPlease run `rustup run nightly rustfmt --config-path {} {}/*.rs`", + config_path.display(), + contract_dir.display() + ); + anyhow::bail!("Fixtures files are not formatted") +} + +/// Invoke `cargo build` to compile the contracts. +fn invoke_build(current_dir: &Path) -> Result<()> { + let encoded_rustflags = [ + "-Clink-arg=-zstack-size=65536", + "-Clink-arg=--import-memory", + "-Clinker-plugin-lto", + "-Ctarget-cpu=mvp", + "-Dwarnings", + ] + .join("\x1f"); + + let build_res = Command::new(env::var("CARGO")?) + .current_dir(current_dir) + .env("CARGO_ENCODED_RUSTFLAGS", encoded_rustflags) + .args(&["build", "--release", "--target=wasm32-unknown-unknown"]) + .output() + .expect("failed to execute process"); + + if build_res.status.success() { + return Ok(()) + } + + let stderr = String::from_utf8_lossy(&build_res.stderr); + eprintln!("{}", stderr); + anyhow::bail!("Failed to build contracts"); +} + +/// Post-process the compiled wasm contracts. +fn post_process_wasm(input_path: &Path, output_path: &Path) -> Result<()> { + let mut module = deserialize_file(input_path)?; + if let Some(section) = module.export_section_mut() { + section.entries_mut().retain(|entry| { + matches!(entry.internal(), Internal::Function(_)) && + (entry.field() == "call" || entry.field() == "deploy") + }); + } + + serialize_to_file(output_path, module).map_err(Into::into) +} + +/// Write the compiled contracts to the given output directory. +fn write_output(build_dir: &Path, out_dir: &Path, entries: Vec) -> Result<()> { + for entry in entries { + let wasm_output = entry.out_wasm_filename(); + post_process_wasm( + &build_dir.join("target/wasm32-unknown-unknown/release").join(&wasm_output), + &out_dir.join(&wasm_output), + )?; + fs::write(out_dir.join(&entry.hash), "")?; + } + + Ok(()) +} + +/// Returns the root path of the wasm workspace. +fn find_workspace_root(current_dir: &Path) -> Option { + let mut current_dir = current_dir.to_path_buf(); + + while current_dir.parent().is_some() { + if current_dir.join("Cargo.toml").exists() { + let cargo_toml_contents = + std::fs::read_to_string(current_dir.join("Cargo.toml")).ok()?; + if cargo_toml_contents.contains("[workspace]") { + return Some(current_dir); + } + } + + current_dir.pop(); + } + + None +} + +fn main() -> Result<()> { + let fixtures_dir: PathBuf = env::var("CARGO_MANIFEST_DIR")?.into(); + let contracts_dir = fixtures_dir.join("contracts"); + let out_dir: PathBuf = env::var("OUT_DIR")?.into(); + let workspace_root = find_workspace_root(&fixtures_dir).expect("workspace root exists; qed"); + + let entries = collect_entries(&contracts_dir, &out_dir); + if entries.is_empty() { + return Ok(()); + } + + let tmp_dir = tempfile::tempdir()?; + let tmp_dir_path = tmp_dir.path(); + + create_cargo_toml(&fixtures_dir, entries.iter(), tmp_dir.path())?; + invoke_cargo_fmt( + &workspace_root.join(".rustfmt.toml"), + entries.iter().map(|entry| &entry.path as _), + &contracts_dir, + )?; + + invoke_build(tmp_dir_path)?; + write_output(tmp_dir_path, &out_dir, entries)?; + + Ok(()) +} diff --git a/substrate/frame/contracts/fixtures/contracts/call.rs b/substrate/frame/contracts/fixtures/contracts/call.rs new file mode 100644 index 000000000000..396b71d5e969 --- /dev/null +++ b/substrate/frame/contracts/fixtures/contracts/call.rs @@ -0,0 +1,48 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: Apache-2.0 + +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +//! This calls another contract as passed as its account id. +#![no_std] +#![no_main] + +extern crate common; +use uapi::{CallFlags, HostFn, HostFnImpl as api}; + +#[no_mangle] +pub extern "C" fn deploy() {} + +#[no_mangle] +pub extern "C" fn call() { + let mut buffer = [0u8; 40]; + let callee_input = 0..4; + let callee_addr = 4..36; + let value = 36..40; + + // Read the input data. + api::input(&mut &mut buffer[..]); + + // Call the callee + api::call_v1( + CallFlags::empty(), + &buffer[callee_addr], + 0u64, // How much gas to devote for the execution. 0 = all. + &buffer[value], + &buffer[callee_input], + None, + ) + .unwrap(); +} diff --git a/substrate/frame/contracts/fixtures/contracts/common/Cargo.toml b/substrate/frame/contracts/fixtures/contracts/common/Cargo.toml new file mode 100644 index 000000000000..b70db7cde45f --- /dev/null +++ b/substrate/frame/contracts/fixtures/contracts/common/Cargo.toml @@ -0,0 +1,9 @@ +[package] +name = "pallet-contracts-fixtures-common" +publish = false +version = "1.0.0" +authors.workspace = true +edition.workspace = true +license.workspace = true +description = "Common utilities for pallet-contracts-fixtures." + diff --git a/substrate/frame/contracts/fixtures/contracts/common/src/lib.rs b/substrate/frame/contracts/fixtures/contracts/common/src/lib.rs new file mode 100644 index 000000000000..29bdbfbb0420 --- /dev/null +++ b/substrate/frame/contracts/fixtures/contracts/common/src/lib.rs @@ -0,0 +1,31 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: Apache-2.0 + +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +#![no_std] +#![cfg(any(target_arch = "wasm32", target_arch = "riscv32"))] + +#[panic_handler] +fn panic(_info: &core::panic::PanicInfo) -> ! { + #[cfg(target_arch = "wasm32")] + core::arch::wasm32::unreachable(); + + #[cfg(target_arch = "riscv32")] + // Safety: The unimp instruction is guaranteed to trap + unsafe { + core::arch::asm!("unimp"); + core::hint::unreachable_unchecked(); + } +} diff --git a/substrate/frame/contracts/fixtures/contracts/dummy.rs b/substrate/frame/contracts/fixtures/contracts/dummy.rs new file mode 100644 index 000000000000..98b9d494bbc6 --- /dev/null +++ b/substrate/frame/contracts/fixtures/contracts/dummy.rs @@ -0,0 +1,26 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: Apache-2.0 + +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +#![no_std] +#![no_main] + +extern crate common; + +#[no_mangle] +pub extern "C" fn deploy() {} + +#[no_mangle] +pub extern "C" fn call() {} diff --git a/substrate/frame/contracts/fixtures/data/call.wat b/substrate/frame/contracts/fixtures/data/call.wat deleted file mode 100644 index 43b32049c88a..000000000000 --- a/substrate/frame/contracts/fixtures/data/call.wat +++ /dev/null @@ -1,39 +0,0 @@ -;; This calls another contract as passed as its account id. -(module - (import "seal0" "seal_input" (func $seal_input (param i32 i32))) - (import "seal1" "seal_call" (func $seal_call (param i32 i32 i64 i32 i32 i32 i32 i32) (result i32))) - (import "env" "memory" (memory 1 1)) - - (func $assert (param i32) - (block $ok - (br_if $ok - (local.get 0) - ) - (unreachable) - ) - ) - - (func (export "deploy")) - - (func (export "call") - ;; Store length of input buffer. - (i32.store (i32.const 0) (i32.const 512)) - - ;; Copy input at address 4. - (call $seal_input (i32.const 4) (i32.const 0)) - - ;; Call passed contract. - (call $assert (i32.eqz - (call $seal_call - (i32.const 0) ;; No flags - (i32.const 8) ;; Pointer to "callee" address. - (i64.const 0) ;; How much gas to devote for the execution. 0 = all. - (i32.const 512) ;; Pointer to the buffer with value to transfer - (i32.const 4) ;; Pointer to input data buffer address - (i32.const 4) ;; Length of input data buffer - (i32.const 4294967295) ;; u32 max value is the sentinel value: do not copy output - (i32.const 0) ;; Length is ignored in this case - ) - )) - ) -) diff --git a/substrate/frame/contracts/fixtures/data/dummy.wat b/substrate/frame/contracts/fixtures/data/dummy.wat deleted file mode 100644 index a6435e49df22..000000000000 --- a/substrate/frame/contracts/fixtures/data/dummy.wat +++ /dev/null @@ -1,6 +0,0 @@ -;; A valid contract which does nothing at all -(module - (import "env" "memory" (memory 1 1)) - (func (export "deploy")) - (func (export "call")) -) diff --git a/substrate/frame/contracts/fixtures/src/lib.rs b/substrate/frame/contracts/fixtures/src/lib.rs index 48117f7ca944..fbc2647709dc 100644 --- a/substrate/frame/contracts/fixtures/src/lib.rs +++ b/substrate/frame/contracts/fixtures/src/lib.rs @@ -16,9 +16,9 @@ // limitations under the License. use sp_runtime::traits::Hash; -use std::{env::var, path::PathBuf}; +use std::{env::var, fs, path::PathBuf}; -fn fixtures_root_dir() -> PathBuf { +fn wat_root_dir() -> PathBuf { match (var("CARGO_MANIFEST_DIR"), var("CARGO_PKG_NAME")) { // When `CARGO_MANIFEST_DIR` is not set, Rust resolves relative paths from the root folder (Err(_), _) => "substrate/frame/contracts/fixtures/data".into(), @@ -33,12 +33,44 @@ fn fixtures_root_dir() -> PathBuf { /// with it's hash. /// /// The fixture files are located under the `fixtures/` directory. -pub fn compile_module(fixture_name: &str) -> wat::Result<(Vec, ::Output)> +fn legacy_compile_module( + fixture_name: &str, +) -> anyhow::Result<(Vec, ::Output)> where T: frame_system::Config, { - let fixture_path = fixtures_root_dir().join(format!("{fixture_name}.wat")); + let fixture_path = wat_root_dir().join(format!("{fixture_name}.wat")); let wasm_binary = wat::parse_file(fixture_path)?; let code_hash = T::Hashing::hash(&wasm_binary); Ok((wasm_binary, code_hash)) } + +/// Load a given wasm module and returns a wasm binary contents along with it's hash. +/// Use the legacy compile_module as fallback, if the rust fixture does not exist yet. +pub fn compile_module( + fixture_name: &str, +) -> anyhow::Result<(Vec, ::Output)> +where + T: frame_system::Config, +{ + let out_dir: std::path::PathBuf = env!("OUT_DIR").into(); + let fixture_path = out_dir.join(format!("{fixture_name}.wasm")); + match fs::read(fixture_path) { + Ok(wasm_binary) => { + let code_hash = T::Hashing::hash(&wasm_binary); + Ok((wasm_binary, code_hash)) + }, + Err(_) => legacy_compile_module::(fixture_name), + } +} + +#[cfg(test)] +mod test { + #[test] + fn out_dir_should_have_compiled_mocks() { + let out_dir: std::path::PathBuf = env!("OUT_DIR").into(); + let dummy_wasm = out_dir.join("dummy.wasm"); + println!("dummy_wasm: {:?}", dummy_wasm); + assert!(dummy_wasm.exists()); + } +} diff --git a/substrate/frame/contracts/mock-network/Cargo.toml b/substrate/frame/contracts/mock-network/Cargo.toml index 9d5fe1aaf4ec..28e24dd15e45 100644 --- a/substrate/frame/contracts/mock-network/Cargo.toml +++ b/substrate/frame/contracts/mock-network/Cargo.toml @@ -16,7 +16,7 @@ frame-system = { path = "../../system", default-features = false} pallet-assets = { path = "../../assets" } pallet-balances = { path = "../../balances" } pallet-contracts = { path = ".." } -pallet-contracts-primitives = { path = "../primitives", default-features = false} +pallet-contracts-uapi = { path = "../uapi", default-features = false} pallet-contracts-proc-macro = { path = "../proc-macro" } pallet-insecure-randomness-collective-flip = { path = "../../insecure-randomness-collective-flip" } pallet-message-queue = { path = "../../message-queue" } @@ -52,7 +52,6 @@ std = [ "frame-support/std", "frame-system/std", "pallet-balances/std", - "pallet-contracts-primitives/std", "pallet-contracts-proc-macro/full", "pallet-contracts/std", "pallet-insecure-randomness-collective-flip/std", diff --git a/substrate/frame/contracts/mock-network/src/tests.rs b/substrate/frame/contracts/mock-network/src/tests.rs index 5193f6570551..a66b2b080196 100644 --- a/substrate/frame/contracts/mock-network/src/tests.rs +++ b/substrate/frame/contracts/mock-network/src/tests.rs @@ -29,9 +29,8 @@ use frame_support::{ traits::{fungibles::Mutate, Currency}, }; use pallet_balances::{BalanceLock, Reasons}; -use pallet_contracts::{CollectEvents, DebugInfo, Determinism}; +use pallet_contracts::{Code, CollectEvents, DebugInfo, Determinism}; use pallet_contracts_fixtures::compile_module; -use pallet_contracts_primitives::Code; use xcm::{v3::prelude::*, VersionedMultiLocation, VersionedXcm}; use xcm_simulator::TestExt; diff --git a/substrate/frame/contracts/primitives/Cargo.toml b/substrate/frame/contracts/primitives/Cargo.toml deleted file mode 100644 index 0394841aa1f4..000000000000 --- a/substrate/frame/contracts/primitives/Cargo.toml +++ /dev/null @@ -1,33 +0,0 @@ -[package] -name = "pallet-contracts-primitives" -version = "24.0.0" -authors.workspace = true -edition.workspace = true -license = "Apache-2.0" -homepage = "https://substrate.io" -repository.workspace = true -description = "A crate that hosts a common definitions that are relevant for the pallet-contracts." -readme = "README.md" - -[package.metadata.docs.rs] -targets = ["x86_64-unknown-linux-gnu"] - -[dependencies] -bitflags = "1.0" -scale-info = { version = "2.10.0", default-features = false, features = ["derive"] } -codec = { package = "parity-scale-codec", version = "3.6.1", default-features = false, features = ["derive"] } - -# Substrate Dependencies (This crate should not rely on frame) -sp-std = { path = "../../../primitives/std", default-features = false} -sp-runtime = { path = "../../../primitives/runtime", default-features = false} -sp-weights = { path = "../../../primitives/weights", default-features = false} - -[features] -default = [ "std" ] -std = [ - "codec/std", - "scale-info/std", - "sp-runtime/std", - "sp-std/std", - "sp-weights/std", -] diff --git a/substrate/frame/contracts/primitives/README.md b/substrate/frame/contracts/primitives/README.md deleted file mode 100644 index c84cfbfe1a87..000000000000 --- a/substrate/frame/contracts/primitives/README.md +++ /dev/null @@ -1,3 +0,0 @@ -A crate that hosts a common definitions that are relevant for the pallet-contracts. - -License: Apache-2.0 diff --git a/substrate/frame/contracts/proc-macro/src/lib.rs b/substrate/frame/contracts/proc-macro/src/lib.rs index ad9cd2dadecf..4ef02497b8ee 100644 --- a/substrate/frame/contracts/proc-macro/src/lib.rs +++ b/substrate/frame/contracts/proc-macro/src/lib.rs @@ -271,7 +271,7 @@ impl HostFn { // process return type let msg = r#"Should return one of the following: - Result<(), TrapReason>, - - Result, + - Result, - Result, - Result"#; let ret_ty = match item.clone().sig.output { @@ -336,7 +336,7 @@ impl HostFn { "()" => Ok(HostFnReturn::Unit), "u32" => Ok(HostFnReturn::U32), "u64" => Ok(HostFnReturn::U64), - "ReturnCode" => Ok(HostFnReturn::ReturnCode), + "ReturnErrorCode" => Ok(HostFnReturn::ReturnCode), _ => Err(err(arg1.span(), &msg)), }?; @@ -550,7 +550,7 @@ fn expand_env(def: &EnvDef, docs: bool) -> TokenStream2 { /// consumed by humans through rustdoc. #[cfg(doc)] pub mod api_doc { - use super::{TrapReason, ReturnCode}; + use super::{TrapReason, ReturnErrorCode}; #docs } } @@ -767,7 +767,7 @@ fn expand_functions(def: &EnvDef, expand_blocks: bool, host_state: TokenStream2) /// #[define_env] /// pub mod some_env { /// #[version(2)] -/// fn foo(ctx: _, memory: _, key_ptr: u32, value_ptr: u32, value_len: u32) -> Result { +/// fn foo(ctx: _, memory: _, key_ptr: u32, value_ptr: u32, value_len: u32) -> Result { /// ctx.some_host_fn(KeyType::Fix, key_ptr, value_ptr, value_len).map(|_| ()) /// } /// @@ -793,7 +793,7 @@ fn expand_functions(def: &EnvDef, expand_blocks: bool, host_state: TokenStream2) /// pub mod some_env { /// #[version(1)] /// #[prefixed_alias] -/// fn foo(ctx: _, memory: _, key_ptr: u32, value_ptr: u32, value_len: u32) -> Result { +/// fn foo(ctx: _, memory: _, key_ptr: u32, value_ptr: u32, value_len: u32) -> Result { /// ctx.some_host_fn(KeyType::Fix, key_ptr, value_ptr, value_len).map(|_| ()) /// } /// @@ -811,7 +811,7 @@ fn expand_functions(def: &EnvDef, expand_blocks: bool, host_state: TokenStream2) /// /// Only following return types are allowed for the host functions defined with the macro: /// - `Result<(), TrapReason>`, -/// - `Result`, +/// - `Result`, /// - `Result`. /// /// The macro expands to `pub struct Env` declaration, with the following traits implementations: diff --git a/substrate/frame/contracts/src/benchmarking/mod.rs b/substrate/frame/contracts/src/benchmarking/mod.rs index ac5787e23404..c532b354ab64 100644 --- a/substrate/frame/contracts/src/benchmarking/mod.rs +++ b/substrate/frame/contracts/src/benchmarking/mod.rs @@ -33,7 +33,6 @@ use crate::{ migration::{ codegen::LATEST_MIGRATION_VERSION, v09, v10, v11, v12, v13, v14, v15, MigrationStep, }, - wasm::CallFlags, Pallet as Contracts, *, }; use codec::{Encode, MaxEncodedLen}; @@ -46,6 +45,7 @@ use frame_support::{ }; use frame_system::RawOrigin; use pallet_balances; +use pallet_contracts_uapi::CallFlags; use sp_runtime::traits::{Bounded, Hash}; use sp_std::prelude::*; use wasm_instrument::parity_wasm::elements::{BlockType, Instruction, ValueType}; diff --git a/substrate/frame/contracts/src/chain_extension.rs b/substrate/frame/contracts/src/chain_extension.rs index 664504d207f3..8a7243d6bb37 100644 --- a/substrate/frame/contracts/src/chain_extension.rs +++ b/substrate/frame/contracts/src/chain_extension.rs @@ -81,7 +81,7 @@ use sp_std::{marker::PhantomData, vec::Vec}; pub use crate::{exec::Ext, gas::ChargedAmount, storage::meter::Diff, Config}; pub use frame_system::Config as SysConfig; -pub use pallet_contracts_primitives::ReturnFlags; +pub use pallet_contracts_uapi::ReturnFlags; /// Result that returns a [`DispatchError`] on error. pub type Result = sp_std::result::Result; diff --git a/substrate/frame/contracts/src/debug.rs b/substrate/frame/contracts/src/debug.rs index e22a841e6fb7..6cdca7aa4c76 100644 --- a/substrate/frame/contracts/src/debug.rs +++ b/substrate/frame/contracts/src/debug.rs @@ -15,9 +15,11 @@ // See the License for the specific language governing permissions and // limitations under the License. -pub use crate::exec::{ExecResult, ExportedFunction}; +pub use crate::{ + exec::{ExecResult, ExportedFunction}, + primitives::ExecReturnValue, +}; use crate::{Config, LOG_TARGET}; -pub use pallet_contracts_primitives::ExecReturnValue; /// Umbrella trait for all interfaces that serves for debugging. pub trait Debugger: Tracing + CallInterceptor {} diff --git a/substrate/frame/contracts/src/exec.rs b/substrate/frame/contracts/src/exec.rs index c26d82f7f110..2183d6b96cc5 100644 --- a/substrate/frame/contracts/src/exec.rs +++ b/substrate/frame/contracts/src/exec.rs @@ -18,6 +18,7 @@ use crate::{ debug::{CallInterceptor, CallSpan, Tracing}, gas::GasMeter, + primitives::{ExecReturnValue, StorageDeposit}, storage::{self, meter::Diff, WriteOutcome}, BalanceOf, CodeHash, CodeInfo, CodeInfoOf, Config, ContractInfo, ContractInfoOf, DebugBufferVec, Determinism, Error, Event, Nonce, Origin, Pallet as Contracts, Schedule, @@ -37,7 +38,6 @@ use frame_support::{ Blake2_128Concat, BoundedVec, StorageHasher, }; use frame_system::{pallet_prelude::BlockNumberFor, RawOrigin}; -use pallet_contracts_primitives::{ExecReturnValue, StorageDeposit}; use smallvec::{Array, SmallVec}; use sp_core::{ ecdsa::Public as ECDSAPublic, @@ -1618,7 +1618,7 @@ mod tests { use codec::{Decode, Encode}; use frame_support::{assert_err, assert_ok, parameter_types}; use frame_system::{EventRecord, Phase}; - use pallet_contracts_primitives::ReturnFlags; + use pallet_contracts_uapi::ReturnFlags; use pretty_assertions::assert_eq; use sp_runtime::{traits::Hash, DispatchError}; use std::{cell::RefCell, collections::hash_map::HashMap, rc::Rc}; diff --git a/substrate/frame/contracts/src/lib.rs b/substrate/frame/contracts/src/lib.rs index 188679dbf490..a15006e6388c 100644 --- a/substrate/frame/contracts/src/lib.rs +++ b/substrate/frame/contracts/src/lib.rs @@ -91,6 +91,9 @@ mod address; mod benchmarking; mod exec; mod gas; +mod primitives; +pub use primitives::*; + mod schedule; mod storage; mod wasm; @@ -128,11 +131,6 @@ use frame_system::{ pallet_prelude::{BlockNumberFor, OriginFor}, EventRecord, Pallet as System, }; -use pallet_contracts_primitives::{ - Code, CodeUploadResult, CodeUploadReturnValue, ContractAccessError, ContractExecResult, - ContractInstantiateResult, ContractResult, ExecReturnValue, GetStorageResult, - InstantiateReturnValue, StorageDeposit, -}; use scale_info::TypeInfo; use smallvec::Array; use sp_runtime::{ diff --git a/substrate/frame/contracts/primitives/src/lib.rs b/substrate/frame/contracts/src/primitives.rs similarity index 96% rename from substrate/frame/contracts/primitives/src/lib.rs rename to substrate/frame/contracts/src/primitives.rs index c33149285004..ab73b28e8c49 100644 --- a/substrate/frame/contracts/primitives/src/lib.rs +++ b/substrate/frame/contracts/src/primitives.rs @@ -17,17 +17,15 @@ //! A crate that hosts a common definitions that are relevant for the pallet-contracts. -#![cfg_attr(not(feature = "std"), no_std)] - -use bitflags::bitflags; use codec::{Decode, Encode, MaxEncodedLen}; +use frame_support::weights::Weight; +use pallet_contracts_uapi::ReturnFlags; use scale_info::TypeInfo; use sp_runtime::{ traits::{Saturating, Zero}, DispatchError, RuntimeDebug, }; use sp_std::prelude::*; -use sp_weights::Weight; /// Result type of a `bare_call` or `bare_instantiate` call as well as `ContractsApi::call` and /// `ContractsApi::instantiate`. @@ -109,15 +107,6 @@ pub enum ContractAccessError { MigrationInProgress, } -bitflags! { - /// Flags used by a contract to customize exit behaviour. - #[derive(Encode, Decode, TypeInfo)] - pub struct ReturnFlags: u32 { - /// If this bit is set all changes made by the contract execution are rolled back. - const REVERT = 0x0000_0001; - } -} - /// Output of a contract call or instantiation which ran to completion. #[derive(Clone, PartialEq, Eq, Encode, Decode, RuntimeDebug, TypeInfo)] pub struct ExecReturnValue { diff --git a/substrate/frame/contracts/src/tests.rs b/substrate/frame/contracts/src/tests.rs index 79ad451964da..4f63104ef268 100644 --- a/substrate/frame/contracts/src/tests.rs +++ b/substrate/frame/contracts/src/tests.rs @@ -30,9 +30,10 @@ use crate::{ }, exec::{Frame, Key}, migration::codegen::LATEST_MIGRATION_VERSION, + primitives::CodeUploadReturnValue, storage::DeletionQueueManager, tests::test_utils::{get_contract, get_contract_checked}, - wasm::{Determinism, ReturnCode as RuntimeReturnCode}, + wasm::{Determinism, ReturnErrorCode as RuntimeReturnCode}, weights::WeightInfo, BalanceOf, Code, CodeHash, CodeInfoOf, CollectEvents, Config, ContractInfo, ContractInfoOf, DebugInfo, DefaultAddressGenerator, DeletionQueueCounter, Error, HoldReason, @@ -55,7 +56,6 @@ use frame_support::{ }; use frame_system::{EventRecord, Phase}; use pallet_contracts_fixtures::compile_module; -use pallet_contracts_primitives::CodeUploadReturnValue; use pretty_assertions::{assert_eq, assert_ne}; use sp_core::ByteArray; use sp_io::hashing::blake2_256; diff --git a/substrate/frame/contracts/src/tests/test_debug.rs b/substrate/frame/contracts/src/tests/test_debug.rs index 2d7ed4743657..c9b6557bbb97 100644 --- a/substrate/frame/contracts/src/tests/test_debug.rs +++ b/substrate/frame/contracts/src/tests/test_debug.rs @@ -18,10 +18,10 @@ use super::*; use crate::{ debug::{CallInterceptor, CallSpan, ExecResult, ExportedFunction, Tracing}, + primitives::ExecReturnValue, AccountIdOf, }; use frame_support::traits::Currency; -use pallet_contracts_primitives::ExecReturnValue; use pretty_assertions::assert_eq; use std::cell::RefCell; diff --git a/substrate/frame/contracts/src/wasm/mod.rs b/substrate/frame/contracts/src/wasm/mod.rs index f73655e99203..448c0dd74960 100644 --- a/substrate/frame/contracts/src/wasm/mod.rs +++ b/substrate/frame/contracts/src/wasm/mod.rs @@ -24,13 +24,13 @@ mod runtime; #[cfg(doc)] pub use crate::wasm::runtime::api_doc; -#[cfg(test)] -pub use tests::MockExt; - pub use crate::wasm::runtime::{ - AllowDeprecatedInterface, AllowUnstableInterface, CallFlags, Environment, ReturnCode, Runtime, + AllowDeprecatedInterface, AllowUnstableInterface, Environment, ReturnErrorCode, Runtime, RuntimeCosts, }; +pub use pallet_contracts_uapi::ReturnFlags; +#[cfg(test)] +pub use tests::MockExt; use crate::{ exec::{ExecResult, Executable, ExportedFunction, Ext}, @@ -436,6 +436,7 @@ mod tests { use crate::{ exec::{AccountIdOf, ErrorOrigin, ExecError, Executable, Ext, Key, SeedOf}, gas::GasMeter, + primitives::ExecReturnValue, storage::WriteOutcome, tests::{RuntimeCall, Test, ALICE, BOB}, BalanceOf, CodeHash, Error, Origin, Pallet as Contracts, @@ -445,7 +446,7 @@ mod tests { assert_err, assert_ok, dispatch::DispatchResultWithPostInfo, weights::Weight, }; use frame_system::pallet_prelude::BlockNumberFor; - use pallet_contracts_primitives::{ExecReturnValue, ReturnFlags}; + use pallet_contracts_uapi::ReturnFlags; use pretty_assertions::assert_eq; use sp_core::H256; use sp_runtime::DispatchError; @@ -2739,7 +2740,7 @@ mod tests { let result = execute(CODE, input, &mut ext).unwrap(); assert_eq!( u32::from_le_bytes(result.data[0..4].try_into().unwrap()), - ReturnCode::KeyNotFound as u32 + ReturnErrorCode::KeyNotFound as u32 ); // value exists @@ -2747,7 +2748,7 @@ mod tests { let result = execute(CODE, input, &mut ext).unwrap(); assert_eq!( u32::from_le_bytes(result.data[0..4].try_into().unwrap()), - ReturnCode::Success as u32 + ReturnErrorCode::Success as u32 ); assert_eq!(ext.storage.get(&[1u8; 64].to_vec()).unwrap(), &[42u8]); assert_eq!(&result.data[4..], &[42u8]); @@ -2757,7 +2758,7 @@ mod tests { let result = execute(CODE, input, &mut ext).unwrap(); assert_eq!( u32::from_le_bytes(result.data[0..4].try_into().unwrap()), - ReturnCode::Success as u32 + ReturnErrorCode::Success as u32 ); assert_eq!(ext.storage.get(&[2u8; 19].to_vec()), Some(&vec![])); assert_eq!(&result.data[4..], &([] as [u8; 0])); @@ -2920,7 +2921,7 @@ mod tests { let result = execute(CODE, input, &mut ext).unwrap(); assert_eq!( u32::from_le_bytes(result.data[0..4].try_into().unwrap()), - ReturnCode::KeyNotFound as u32 + ReturnErrorCode::KeyNotFound as u32 ); // value did exist -> value returned @@ -2928,7 +2929,7 @@ mod tests { let result = execute(CODE, input, &mut ext).unwrap(); assert_eq!( u32::from_le_bytes(result.data[0..4].try_into().unwrap()), - ReturnCode::Success as u32 + ReturnErrorCode::Success as u32 ); assert_eq!(ext.storage.get(&[1u8; 64].to_vec()), None); assert_eq!(&result.data[4..], &[42u8]); @@ -2938,7 +2939,7 @@ mod tests { let result = execute(CODE, input, &mut ext).unwrap(); assert_eq!( u32::from_le_bytes(result.data[0..4].try_into().unwrap()), - ReturnCode::Success as u32 + ReturnErrorCode::Success as u32 ); assert_eq!(ext.storage.get(&[2u8; 19].to_vec()), None); assert_eq!(&result.data[4..], &[0u8; 0]); diff --git a/substrate/frame/contracts/src/wasm/runtime.rs b/substrate/frame/contracts/src/wasm/runtime.rs index b3013adb790e..871ef05c37e6 100644 --- a/substrate/frame/contracts/src/wasm/runtime.rs +++ b/substrate/frame/contracts/src/wasm/runtime.rs @@ -20,10 +20,10 @@ use crate::{ exec::{ExecError, ExecResult, Ext, Key, TopicOf}, gas::{ChargedAmount, Token}, + primitives::ExecReturnValue, schedule::HostFnWeights, BalanceOf, CodeHash, Config, DebugBufferVec, Error, SENTINEL, }; -use bitflags::bitflags; use codec::{Decode, DecodeLimit, Encode, MaxEncodedLen}; use frame_support::{ dispatch::DispatchInfo, @@ -33,8 +33,8 @@ use frame_support::{ traits::Get, weights::Weight, }; -use pallet_contracts_primitives::{ExecReturnValue, ReturnFlags}; use pallet_contracts_proc_macro::define_env; +use pallet_contracts_uapi::{CallFlags, ReturnFlags}; use sp_io::hashing::{blake2_128, blake2_256, keccak_256, sha2_256}; use sp_runtime::{ traits::{Bounded, Zero}, @@ -87,55 +87,16 @@ enum KeyType { Var(u32), } -/// Every error that can be returned to a contract when it calls any of the host functions. -/// -/// # Note -/// -/// This enum can be extended in the future: New codes can be added but existing codes -/// will not be changed or removed. This means that any contract **must not** exhaustively -/// match return codes. Instead, contracts should prepare for unknown variants and deal with -/// those errors gracefully in order to be forward compatible. -#[derive(Debug)] -#[repr(u32)] -pub enum ReturnCode { - /// API call successful. - Success = 0, - /// The called function trapped and has its state changes reverted. - /// In this case no output buffer is returned. - CalleeTrapped = 1, - /// The called function ran to completion but decided to revert its state. - /// An output buffer is returned when one was supplied. - CalleeReverted = 2, - /// The passed key does not exist in storage. - KeyNotFound = 3, - /// See [`Error::TransferFailed`]. - TransferFailed = 5, - /// No code could be found at the supplied code hash. - CodeNotFound = 7, - /// The contract that was called is no contract (a plain account). - NotCallable = 8, - /// The call dispatched by `seal_call_runtime` was executed but returned an error. - CallRuntimeFailed = 10, - /// ECDSA pubkey recovery failed (most probably wrong recovery id or signature), or - /// ECDSA compressed pubkey conversion into Ethereum address failed (most probably - /// wrong pubkey provided). - EcdsaRecoverFailed = 11, - /// sr25519 signature verification failed. - Sr25519VerifyFailed = 12, - /// The `xcm_execute` call failed. - XcmExecutionFailed = 13, - /// The `xcm_send` call failed. - XcmSendFailed = 14, -} +pub use pallet_contracts_uapi::ReturnErrorCode; parameter_types! { /// Getter types used by [`crate::api_doc::Current::call_runtime`] - const CallRuntimeFailed: ReturnCode = ReturnCode::CallRuntimeFailed; + const CallRuntimeFailed: ReturnErrorCode = ReturnErrorCode::CallRuntimeFailed; /// Getter types used by [`crate::api_doc::Current::xcm_execute`] - const XcmExecutionFailed: ReturnCode = ReturnCode::XcmExecutionFailed; + const XcmExecutionFailed: ReturnErrorCode = ReturnErrorCode::XcmExecutionFailed; } -impl From for ReturnCode { +impl From for ReturnErrorCode { fn from(from: ExecReturnValue) -> Self { if from.flags.contains(ReturnFlags::REVERT) { Self::CalleeReverted @@ -145,12 +106,6 @@ impl From for ReturnCode { } } -impl From for u32 { - fn from(code: ReturnCode) -> u32 { - code as u32 - } -} - /// The data passed through when a contract uses `seal_return`. #[derive(RuntimeDebug)] pub struct ReturnData { @@ -411,52 +366,6 @@ impl Token for RuntimeToken { } } -bitflags! { - /// Flags used to change the behaviour of `seal_call` and `seal_delegate_call`. - pub struct CallFlags: u32 { - /// Forward the input of current function to the callee. - /// - /// Supplied input pointers are ignored when set. - /// - /// # Note - /// - /// A forwarding call will consume the current contracts input. Any attempt to - /// access the input after this call returns will lead to [`Error::InputForwarded`]. - /// It does not matter if this is due to calling `seal_input` or trying another - /// forwarding call. Consider using [`Self::CLONE_INPUT`] in order to preserve - /// the input. - const FORWARD_INPUT = 0b0000_0001; - /// Identical to [`Self::FORWARD_INPUT`] but without consuming the input. - /// - /// This adds some additional weight costs to the call. - /// - /// # Note - /// - /// This implies [`Self::FORWARD_INPUT`] and takes precedence when both are set. - const CLONE_INPUT = 0b0000_0010; - /// Do not return from the call but rather return the result of the callee to the - /// callers caller. - /// - /// # Note - /// - /// This makes the current contract completely transparent to its caller by replacing - /// this contracts potential output by the callee ones. Any code after `seal_call` - /// can be safely considered unreachable. - const TAIL_CALL = 0b0000_0100; - /// Allow the callee to reenter into the current contract. - /// - /// Without this flag any reentrancy into the current contract that originates from - /// the callee (or any of its callees) is denied. This includes the first callee: - /// You cannot call into yourself with this flag set. - /// - /// # Note - /// - /// For `seal_delegate_call` should be always unset, otherwise - /// [`Error::InvalidCallFlags`] is returned. - const ALLOW_REENTRY = 0b0000_1000; - } -} - /// The kind of call that should be performed. enum CallType { /// Execute another instantiated contract @@ -603,20 +512,20 @@ impl<'a, E: Ext + 'a> Runtime<'a, E> { /// Charge, Run and adjust gas, for executing the given dispatchable. fn call_dispatchable< - ErrorReturnCode: Get, + ErrorReturnCode: Get, F: FnOnce(&mut Self) -> DispatchResultWithPostInfo, >( &mut self, dispatch_info: DispatchInfo, run: F, - ) -> Result { + ) -> Result { use frame_support::dispatch::extract_actual_weight; let charged = self.charge_gas(RuntimeCosts::CallRuntime(dispatch_info.weight))?; let result = run(self); let actual_weight = extract_actual_weight(&result, &dispatch_info); self.adjust_gas(charged, RuntimeCosts::CallRuntime(actual_weight)); match result { - Ok(_) => Ok(ReturnCode::Success), + Ok(_) => Ok(ReturnErrorCode::Success), Err(e) => { if self.ext.append_debug_buffer("") { self.ext.append_debug_buffer("call failed with: "); @@ -807,9 +716,9 @@ impl<'a, E: Ext + 'a> Runtime<'a, E> { Ok(()) } - /// Fallible conversion of `DispatchError` to `ReturnCode`. - fn err_into_return_code(from: DispatchError) -> Result { - use ReturnCode::*; + /// Fallible conversion of `DispatchError` to `ReturnErrorCode`. + fn err_into_return_code(from: DispatchError) -> Result { + use ReturnErrorCode::*; let transfer_failed = Error::::TransferFailed.into(); let no_code = Error::::CodeNotFound.into(); @@ -823,8 +732,8 @@ impl<'a, E: Ext + 'a> Runtime<'a, E> { } } - /// Fallible conversion of a `ExecResult` to `ReturnCode`. - fn exec_into_return_code(from: ExecResult) -> Result { + /// Fallible conversion of a `ExecResult` to `ReturnErrorCode`. + fn exec_into_return_code(from: ExecResult) -> Result { use crate::exec::ErrorOrigin::Callee; let ExecError { error, origin } = match from { @@ -833,7 +742,7 @@ impl<'a, E: Ext + 'a> Runtime<'a, E> { }; match (error, origin) { - (_, Callee) => Ok(ReturnCode::CalleeTrapped), + (_, Callee) => Ok(ReturnErrorCode::CalleeTrapped), (err, _) => Self::err_into_return_code(err), } } @@ -907,7 +816,7 @@ impl<'a, E: Ext + 'a> Runtime<'a, E> { key_ptr: u32, out_ptr: u32, out_len_ptr: u32, - ) -> Result { + ) -> Result { let charged = self.charge_gas(RuntimeCosts::GetStorage(self.ext.max_value_size()))?; let key = self.decode_key(memory, key_type, key_ptr)?; let outcome = self.ext.get_storage(&key); @@ -922,10 +831,10 @@ impl<'a, E: Ext + 'a> Runtime<'a, E> { false, already_charged, )?; - Ok(ReturnCode::Success) + Ok(ReturnErrorCode::Success) } else { self.adjust_gas(charged, RuntimeCosts::GetStorage(0)); - Ok(ReturnCode::KeyNotFound) + Ok(ReturnErrorCode::KeyNotFound) } } @@ -952,7 +861,7 @@ impl<'a, E: Ext + 'a> Runtime<'a, E> { input_data_len: u32, output_ptr: u32, output_len_ptr: u32, - ) -> Result { + ) -> Result { self.charge_gas(call_type.cost())?; let input_data = if flags.contains(CallFlags::CLONE_INPUT) { let input = self.input_data.as_ref().ok_or(Error::::InputForwarded)?; @@ -1036,7 +945,7 @@ impl<'a, E: Ext + 'a> Runtime<'a, E> { output_len_ptr: u32, salt_ptr: u32, salt_len: u32, - ) -> Result { + ) -> Result { self.charge_gas(RuntimeCosts::InstantiateBase { input_data_len, salt_len })?; let deposit_limit: BalanceOf<::T> = if deposit_ptr == SENTINEL { BalanceOf::<::T>::zero() @@ -1096,10 +1005,7 @@ impl<'a, E: Ext + 'a> Runtime<'a, E> { pub mod env { /// Set the value at the given key in the contract storage. - /// - /// Equivalent to the newer [`seal1`][`super::api_doc::Version1::set_storage`] version with the - /// exception of the return type. Still a valid thing to call when not interested in the return - /// value. + /// See [`pallet_contracts_uapi::HostFn::set_storage`] #[prefixed_alias] fn set_storage( ctx: _, @@ -1112,23 +1018,7 @@ pub mod env { } /// Set the value at the given key in the contract storage. - /// - /// This version is to be used with a fixed sized storage key. For runtimes supporting - /// transparent hashing, please use the newer version of this function. - /// - /// The value length must not exceed the maximum defined by the contracts module parameters. - /// Specifying a `value_len` of zero will store an empty value. - /// - /// # Parameters - /// - /// - `key_ptr`: pointer into the linear memory where the location to store the value is placed. - /// - `value_ptr`: pointer into the linear memory where the value to set is placed. - /// - `value_len`: the length of the value in bytes. - /// - /// # Return Value - /// - /// Returns the size of the pre-existing value at the specified key if any. Otherwise - /// `SENTINEL` is returned as a sentinel value. + /// See [`pallet_contracts_uapi::HostFn::set_storage_v1`] #[version(1)] #[prefixed_alias] fn set_storage( @@ -1142,21 +1032,7 @@ pub mod env { } /// Set the value at the given key in the contract storage. - /// - /// The key and value lengths must not exceed the maximums defined by the contracts module - /// parameters. Specifying a `value_len` of zero will store an empty value. - /// - /// # Parameters - /// - /// - `key_ptr`: pointer into the linear memory where the location to store the value is placed. - /// - `key_len`: the length of the key in bytes. - /// - `value_ptr`: pointer into the linear memory where the value to set is placed. - /// - `value_len`: the length of the value in bytes. - /// - /// # Return Value - /// - /// Returns the size of the pre-existing value at the specified key if any. Otherwise - /// `SENTINEL` is returned as a sentinel value. + /// See [`pallet_contracts_uapi::HostFn::set_storage_v2`] #[version(2)] #[prefixed_alias] fn set_storage( @@ -1171,26 +1047,14 @@ pub mod env { } /// Clear the value at the given key in the contract storage. - /// - /// Equivalent to the newer [`seal1`][`super::api_doc::Version1::clear_storage`] version with - /// the exception of the return type. Still a valid thing to call when not interested in the - /// return value. + /// See [`pallet_contracts_uapi::HostFn::clear_storage`] #[prefixed_alias] fn clear_storage(ctx: _, memory: _, key_ptr: u32) -> Result<(), TrapReason> { ctx.clear_storage(memory, KeyType::Fix, key_ptr).map(|_| ()) } /// Clear the value at the given key in the contract storage. - /// - /// # Parameters - /// - /// - `key_ptr`: pointer into the linear memory where the key is placed. - /// - `key_len`: the length of the key in bytes. - /// - /// # Return Value - /// - /// Returns the size of the pre-existing value at the specified key if any. Otherwise - /// `SENTINEL` is returned as a sentinel value. + /// See [`pallet_contracts_uapi::HostFn::clear_storage_v1`] #[version(1)] #[prefixed_alias] fn clear_storage(ctx: _, memory: _, key_ptr: u32, key_len: u32) -> Result { @@ -1198,20 +1062,7 @@ pub mod env { } /// Retrieve the value under the given key from storage. - /// - /// This version is to be used with a fixed sized storage key. For runtimes supporting - /// transparent hashing, please use the newer version of this function. - /// - /// # Parameters - /// - /// - `key_ptr`: pointer into the linear memory where the key of the requested value is placed. - /// - `out_ptr`: pointer to the linear memory where the value is written to. - /// - `out_len_ptr`: in-out pointer into linear memory where the buffer length is read from and - /// the value length is written to. - /// - /// # Errors - /// - /// `ReturnCode::KeyNotFound` + /// See [`pallet_contracts_uapi::HostFn::get_storage`] #[prefixed_alias] fn get_storage( ctx: _, @@ -1219,28 +1070,12 @@ pub mod env { key_ptr: u32, out_ptr: u32, out_len_ptr: u32, - ) -> Result { + ) -> Result { ctx.get_storage(memory, KeyType::Fix, key_ptr, out_ptr, out_len_ptr) } /// Retrieve the value under the given key from storage. - /// - /// This version is to be used with a fixed sized storage key. For runtimes supporting - /// transparent hashing, please use the newer version of this function. - /// - /// The key length must not exceed the maximum defined by the contracts module parameter. - /// - /// # Parameters - /// - /// - `key_ptr`: pointer into the linear memory where the key of the requested value is placed. - /// - `key_len`: the length of the key in bytes. - /// - `out_ptr`: pointer to the linear memory where the value is written to. - /// - `out_len_ptr`: in-out pointer into linear memory where the buffer length is read from and - /// the value length is written to. - /// - /// # Errors - /// - /// - `ReturnCode::KeyNotFound` + /// See [`pallet_contracts_uapi::HostFn::get_storage_v1`] #[version(1)] #[prefixed_alias] fn get_storage( @@ -1250,41 +1085,19 @@ pub mod env { key_len: u32, out_ptr: u32, out_len_ptr: u32, - ) -> Result { + ) -> Result { ctx.get_storage(memory, KeyType::Var(key_len), key_ptr, out_ptr, out_len_ptr) } /// Checks whether there is a value stored under the given key. - /// - /// This version is to be used with a fixed sized storage key. For runtimes supporting - /// transparent hashing, please use the newer version of this function. - /// - /// # Parameters - /// - /// - `key_ptr`: pointer into the linear memory where the key of the requested value is placed. - /// - /// # Return Value - /// - /// Returns the size of the pre-existing value at the specified key if any. Otherwise - /// `SENTINEL` is returned as a sentinel value. + /// See [`pallet_contracts_uapi::HostFn::contains_storage`] #[prefixed_alias] fn contains_storage(ctx: _, memory: _, key_ptr: u32) -> Result { ctx.contains_storage(memory, KeyType::Fix, key_ptr) } /// Checks whether there is a value stored under the given key. - /// - /// The key length must not exceed the maximum defined by the contracts module parameter. - /// - /// # Parameters - /// - /// - `key_ptr`: pointer into the linear memory where the key of the requested value is placed. - /// - `key_len`: the length of the key in bytes. - /// - /// # Return Value - /// - /// Returns the size of the pre-existing value at the specified key if any. Otherwise - /// `SENTINEL` is returned as a sentinel value. + /// See [`pallet_contracts_uapi::HostFn::contains_storage_v1`] #[version(1)] #[prefixed_alias] fn contains_storage(ctx: _, memory: _, key_ptr: u32, key_len: u32) -> Result { @@ -1292,18 +1105,7 @@ pub mod env { } /// Retrieve and remove the value under the given key from storage. - /// - /// # Parameters - /// - /// - `key_ptr`: pointer into the linear memory where the key of the requested value is placed. - /// - `key_len`: the length of the key in bytes. - /// - `out_ptr`: pointer to the linear memory where the value is written to. - /// - `out_len_ptr`: in-out pointer into linear memory where the buffer length is read from and - /// the value length is written to. - /// - /// # Errors - /// - /// - `ReturnCode::KeyNotFound` + /// See [`pallet_contracts_uapi::HostFn::take_storage`] #[prefixed_alias] fn take_storage( ctx: _, @@ -1312,7 +1114,7 @@ pub mod env { key_len: u32, out_ptr: u32, out_len_ptr: u32, - ) -> Result { + ) -> Result { let charged = ctx.charge_gas(RuntimeCosts::TakeStorage(ctx.ext.max_value_size()))?; ensure!( key_len <= <::T as Config>::MaxStorageKeyLen::get(), @@ -1326,27 +1128,15 @@ pub mod env { )? { ctx.adjust_gas(charged, RuntimeCosts::TakeStorage(value.len() as u32)); ctx.write_sandbox_output(memory, out_ptr, out_len_ptr, &value, false, already_charged)?; - Ok(ReturnCode::Success) + Ok(ReturnErrorCode::Success) } else { ctx.adjust_gas(charged, RuntimeCosts::TakeStorage(0)); - Ok(ReturnCode::KeyNotFound) + Ok(ReturnErrorCode::KeyNotFound) } } /// Transfer some value to another account. - /// - /// # Parameters - /// - /// - `account_ptr`: a pointer to the address of the beneficiary account Should be decodable as - /// an `T::AccountId`. Traps otherwise. - /// - `account_len`: length of the address buffer. - /// - `value_ptr`: a pointer to the buffer with value, how much value to send. Should be - /// decodable as a `T::Balance`. Traps otherwise. - /// - `value_len`: length of the value buffer. - /// - /// # Errors - /// - /// - `ReturnCode::TransferFailed` + /// See [`pallet_contracts_uapi::HostFn::transfer`]. #[prefixed_alias] fn transfer( ctx: _, @@ -1355,14 +1145,14 @@ pub mod env { _account_len: u32, value_ptr: u32, _value_len: u32, - ) -> Result { + ) -> Result { ctx.charge_gas(RuntimeCosts::Transfer)?; let callee: <::T as frame_system::Config>::AccountId = ctx.read_sandbox_memory_as(memory, account_ptr)?; let value: BalanceOf<::T> = ctx.read_sandbox_memory_as(memory, value_ptr)?; let result = ctx.ext.transfer(&callee, value); match result { - Ok(()) => Ok(ReturnCode::Success), + Ok(()) => Ok(ReturnErrorCode::Success), Err(err) => { let code = Runtime::::err_into_return_code(err)?; Ok(code) @@ -1372,17 +1162,11 @@ pub mod env { /// Make a call to another contract. /// - /// # New version available - /// - /// This is equivalent to calling the newer version of this function with - /// `flags` set to `ALLOW_REENTRY`. See the newer version for documentation. - /// /// # Note /// - /// The values `_callee_len` and `_value_len` are ignored because the encoded sizes - /// of those types are fixed through - /// [`codec::MaxEncodedLen`]. The fields exist - /// for backwards compatibility. Consider switching to the newest version of this function. + /// The values `_callee_len` and `_value_len` are ignored because the encoded sizes of those + /// types are fixed through [`codec::MaxEncodedLen`]. The fields exist for backwards + /// compatibility. Consider switching to the newest version of this function. #[prefixed_alias] fn call( ctx: _, @@ -1396,7 +1180,7 @@ pub mod env { input_data_len: u32, output_ptr: u32, output_len_ptr: u32, - ) -> Result { + ) -> Result { ctx.call( memory, CallFlags::ALLOW_REENTRY, @@ -1414,10 +1198,7 @@ pub mod env { } /// Make a call to another contract. - /// - /// Equivalent to the newer [`seal2`][`super::api_doc::Version2::call`] version but works with - /// *ref_time* Weight only. It is recommended to switch to the latest version, once it's - /// stabilized. + /// See [`pallet_contracts_uapi::HostFn::call_v1`]. #[version(1)] #[prefixed_alias] fn call( @@ -1431,7 +1212,7 @@ pub mod env { input_data_len: u32, output_ptr: u32, output_len_ptr: u32, - ) -> Result { + ) -> Result { ctx.call( memory, CallFlags::from_bits(flags).ok_or(Error::::InvalidCallFlags)?, @@ -1449,39 +1230,7 @@ pub mod env { } /// Make a call to another contract. - /// - /// The callees output buffer is copied to `output_ptr` and its length to `output_len_ptr`. - /// The copy of the output buffer can be skipped by supplying the sentinel value - /// of `SENTINEL` to `output_ptr`. - /// - /// # Parameters - /// - /// - `flags`: See `crate::wasm::runtime::CallFlags` for a documentation of the supported flags. - /// - `callee_ptr`: a pointer to the address of the callee contract. Should be decodable as an - /// `T::AccountId`. Traps otherwise. - /// - `ref_time_limit`: how much *ref_time* Weight to devote to the execution. - /// - `proof_size_limit`: how much *proof_size* Weight to devote to the execution. - /// - `deposit_ptr`: a pointer to the buffer with value of the storage deposit limit for the - /// call. Should be decodable as a `T::Balance`. Traps otherwise. Passing `SENTINEL` means - /// setting no specific limit for the call, which implies storage usage up to the limit of the - /// parent call. - /// - `value_ptr`: a pointer to the buffer with value, how much value to send. Should be - /// decodable as a `T::Balance`. Traps otherwise. - /// - `input_data_ptr`: a pointer to a buffer to be used as input data to the callee. - /// - `input_data_len`: length of the input data buffer. - /// - `output_ptr`: a pointer where the output buffer is copied to. - /// - `output_len_ptr`: in-out pointer to where the length of the buffer is read from and the - /// actual length is written to. - /// - /// # Errors - /// - /// An error means that the call wasn't successful output buffer is returned unless - /// stated otherwise. - /// - /// - `ReturnCode::CalleeReverted`: Output buffer is returned. - /// - `ReturnCode::CalleeTrapped` - /// - `ReturnCode::TransferFailed` - /// - `ReturnCode::NotCallable` + /// See [`pallet_contracts_uapi::HostFn::call_v2`]. #[version(2)] #[unstable] fn call( @@ -1497,7 +1246,7 @@ pub mod env { input_data_len: u32, output_ptr: u32, output_len_ptr: u32, - ) -> Result { + ) -> Result { ctx.call( memory, CallFlags::from_bits(flags).ok_or(Error::::InvalidCallFlags)?, @@ -1515,29 +1264,7 @@ pub mod env { } /// Execute code in the context (storage, caller, value) of the current contract. - /// - /// Reentrancy protection is always disabled since the callee is allowed - /// to modify the callers storage. This makes going through a reentrancy attack - /// unnecessary for the callee when it wants to exploit the caller. - /// - /// # Parameters - /// - /// - `flags`: see `crate::wasm::runtime::CallFlags` for a documentation of the supported flags. - /// - `code_hash`: a pointer to the hash of the code to be called. - /// - `input_data_ptr`: a pointer to a buffer to be used as input data to the callee. - /// - `input_data_len`: length of the input data buffer. - /// - `output_ptr`: a pointer where the output buffer is copied to. - /// - `output_len_ptr`: in-out pointer to where the length of the buffer is read from and the - /// actual length is written to. - /// - /// # Errors - /// - /// An error means that the call wasn't successful and no output buffer is returned unless - /// stated otherwise. - /// - /// - `ReturnCode::CalleeReverted`: Output buffer is returned. - /// - `ReturnCode::CalleeTrapped` - /// - `ReturnCode::CodeNotFound` + /// See [`pallet_contracts_uapi::HostFn::delegate_call`]. #[prefixed_alias] fn delegate_call( ctx: _, @@ -1548,7 +1275,7 @@ pub mod env { input_data_len: u32, output_ptr: u32, output_len_ptr: u32, - ) -> Result { + ) -> Result { ctx.call( memory, CallFlags::from_bits(flags).ok_or(Error::::InvalidCallFlags)?, @@ -1561,11 +1288,7 @@ pub mod env { } /// Instantiate a contract with the specified code hash. - /// - /// # New version available - /// - /// This is equivalent to calling the newer version of this function. The newer version - /// drops the now unnecessary length fields. + /// See [`pallet_contracts_uapi::HostFn::instantiate`]. /// /// # Note /// @@ -1589,7 +1312,7 @@ pub mod env { output_len_ptr: u32, salt_ptr: u32, salt_len: u32, - ) -> Result { + ) -> Result { ctx.instantiate( memory, code_hash_ptr, @@ -1608,10 +1331,7 @@ pub mod env { } /// Instantiate a contract with the specified code hash. - /// - /// Equivalent to the newer [`seal2`][`super::api_doc::Version2::instantiate`] version but works - /// with *ref_time* Weight only. It is recommended to switch to the latest version, once it's - /// stabilized. + /// See [`pallet_contracts_uapi::HostFn::instantiate_v1`]. #[version(1)] #[prefixed_alias] fn instantiate( @@ -1628,7 +1348,7 @@ pub mod env { output_len_ptr: u32, salt_ptr: u32, salt_len: u32, - ) -> Result { + ) -> Result { ctx.instantiate( memory, code_hash_ptr, @@ -1647,48 +1367,7 @@ pub mod env { } /// Instantiate a contract with the specified code hash. - /// - /// This function creates an account and executes the constructor defined in the code specified - /// by the code hash. The address of this new account is copied to `address_ptr` and its length - /// to `address_len_ptr`. The constructors output buffer is copied to `output_ptr` and its - /// length to `output_len_ptr`. The copy of the output buffer and address can be skipped by - /// supplying the sentinel value of `SENTINEL` to `output_ptr` or `address_ptr`. - /// - /// # Parameters - /// - /// - `code_hash_ptr`: a pointer to the buffer that contains the initializer code. - /// - `ref_time_limit`: how much *ref_time* Weight to devote to the execution. - /// - `proof_size_limit`: how much *proof_size* Weight to devote to the execution. - /// - `deposit_ptr`: a pointer to the buffer with value of the storage deposit limit for - /// instantiation. Should be decodable as a `T::Balance`. Traps otherwise. Passing `SENTINEL` - /// means setting no specific limit for the call, which implies storage usage up to the limit - /// of the parent call. - /// - `value_ptr`: a pointer to the buffer with value, how much value to send. Should be - /// decodable as a `T::Balance`. Traps otherwise. - /// - `input_data_ptr`: a pointer to a buffer to be used as input data to the initializer code. - /// - `input_data_len`: length of the input data buffer. - /// - `address_ptr`: a pointer where the new account's address is copied to. `SENTINEL` means - /// not to copy. - /// - `address_len_ptr`: pointer to where put the length of the address. - /// - `output_ptr`: a pointer where the output buffer is copied to. `SENTINEL` means not to - /// copy. - /// - `output_len_ptr`: in-out pointer to where the length of the buffer is read from and the - /// actual length is written to. - /// - `salt_ptr`: Pointer to raw bytes used for address derivation. See `fn contract_address`. - /// - `salt_len`: length in bytes of the supplied salt. - /// - /// # Errors - /// - /// Please consult the `ReturnCode` enum declaration for more information on those - /// errors. Here we only note things specific to this function. - /// - /// An error means that the account wasn't created and no address or output buffer - /// is returned unless stated otherwise. - /// - /// - `ReturnCode::CalleeReverted`: Output buffer is returned. - /// - `ReturnCode::CalleeTrapped` - /// - `ReturnCode::TransferFailed` - /// - `ReturnCode::CodeNotFound` + /// See [`pallet_contracts_uapi::HostFn::instantiate_v2`]. #[version(2)] #[unstable] fn instantiate( @@ -1707,7 +1386,7 @@ pub mod env { output_len_ptr: u32, salt_ptr: u32, salt_len: u32, - ) -> Result { + ) -> Result { ctx.instantiate( memory, code_hash_ptr, @@ -1726,11 +1405,7 @@ pub mod env { } /// Remove the calling account and transfer remaining balance. - /// - /// # New version available - /// - /// This is equivalent to calling the newer version of this function. The newer version - /// drops the now unnecessary length fields. + /// See [`pallet_contracts_uapi::HostFn::terminate`]. /// /// # Note /// @@ -1748,20 +1423,7 @@ pub mod env { } /// Remove the calling account and transfer remaining **free** balance. - /// - /// This function never returns. Either the termination was successful and the - /// execution of the destroyed contract is halted. Or it failed during the termination - /// which is considered fatal and results in a trap + rollback. - /// - /// - `beneficiary_ptr`: a pointer to the address of the beneficiary account where all where all - /// remaining funds of the caller are transferred. Should be decodable as an `T::AccountId`. - /// Traps otherwise. - /// - /// # Traps - /// - /// - The contract is live i.e is already on the call stack. - /// - Failed to send the balance to the beneficiary. - /// - The deletion queue is full. + /// See [`pallet_contracts_uapi::HostFn::terminate_v1`]. #[version(1)] #[prefixed_alias] fn terminate(ctx: _, memory: _, beneficiary_ptr: u32) -> Result<(), TrapReason> { @@ -1769,15 +1431,7 @@ pub mod env { } /// Stores the input passed by the caller into the supplied buffer. - /// - /// The value is stored to linear memory at the address pointed to by `out_ptr`. - /// `out_len_ptr` must point to a u32 value that describes the available space at - /// `out_ptr`. This call overwrites it with the size of the value. If the available - /// space at `out_ptr` is less than the size of the value a trap is triggered. - /// - /// # Note - /// - /// This function traps if the input was previously forwarded by a [`call()`][`Self::call()`]. + /// See [`pallet_contracts_uapi::HostFn::input`]. #[prefixed_alias] fn input(ctx: _, memory: _, out_ptr: u32, out_len_ptr: u32) -> Result<(), TrapReason> { ctx.charge_gas(RuntimeCosts::InputBase)?; @@ -1793,22 +1447,7 @@ pub mod env { } /// Cease contract execution and save a data buffer as a result of the execution. - /// - /// This function never returns as it stops execution of the caller. - /// This is the only way to return a data buffer to the caller. Returning from - /// execution without calling this function is equivalent to calling: - /// ```nocompile - /// seal_return(0, 0, 0); - /// ``` - /// - /// The flags argument is a bitfield that can be used to signal special return - /// conditions to the supervisor: - /// --- lsb --- - /// bit 0 : REVERT - Revert all storage changes made by the caller. - /// bit [1, 31]: Reserved for future use. - /// --- msb --- - /// - /// Using a reserved bit triggers a trap. + /// See [`pallet_contracts_uapi::HostFn::return_value`]. fn seal_return( ctx: _, memory: _, @@ -1824,18 +1463,7 @@ pub mod env { } /// Stores the address of the caller into the supplied buffer. - /// - /// The value is stored to linear memory at the address pointed to by `out_ptr`. - /// `out_len_ptr` must point to a u32 value that describes the available space at - /// `out_ptr`. This call overwrites it with the size of the value. If the available - /// space at `out_ptr` is less than the size of the value a trap is triggered. - /// - /// If this is a top-level call (i.e. initiated by an extrinsic) the origin address of the - /// extrinsic will be returned. Otherwise, if this call is initiated by another contract then - /// the address of the contract will be returned. The value is encoded as T::AccountId. - /// - /// If there is no address associated with the caller (e.g. because the caller is root) then - /// it traps with `BadOrigin`. + /// See [`pallet_contracts_uapi::HostFn::caller`]. #[prefixed_alias] fn caller(ctx: _, memory: _, out_ptr: u32, out_len_ptr: u32) -> Result<(), TrapReason> { ctx.charge_gas(RuntimeCosts::Caller)?; @@ -1851,13 +1479,7 @@ pub mod env { } /// Checks whether a specified address belongs to a contract. - /// - /// # Parameters - /// - /// - `account_ptr`: a pointer to the address of the beneficiary account Should be decodable as - /// an `T::AccountId`. Traps otherwise. - /// - /// Returned value is a `u32`-encoded boolean: (0 = false, 1 = true). + /// See [`pallet_contracts_uapi::HostFn::is_contract`]. #[prefixed_alias] fn is_contract(ctx: _, memory: _, account_ptr: u32) -> Result { ctx.charge_gas(RuntimeCosts::IsContract)?; @@ -1868,18 +1490,7 @@ pub mod env { } /// Retrieve the code hash for a specified contract address. - /// - /// # Parameters - /// - /// - `account_ptr`: a pointer to the address in question. Should be decodable as an - /// `T::AccountId`. Traps otherwise. - /// - `out_ptr`: pointer to the linear memory where the returning value is written to. - /// - `out_len_ptr`: in-out pointer into linear memory where the buffer length is read from and - /// the value length is written to. - /// - /// # Errors - /// - /// - `ReturnCode::KeyNotFound` + /// See [`pallet_contracts_uapi::HostFn::code_hash`]. #[prefixed_alias] fn code_hash( ctx: _, @@ -1887,7 +1498,7 @@ pub mod env { account_ptr: u32, out_ptr: u32, out_len_ptr: u32, - ) -> Result { + ) -> Result { ctx.charge_gas(RuntimeCosts::CodeHash)?; let address: <::T as frame_system::Config>::AccountId = ctx.read_sandbox_memory_as(memory, account_ptr)?; @@ -1900,19 +1511,14 @@ pub mod env { false, already_charged, )?; - Ok(ReturnCode::Success) + Ok(ReturnErrorCode::Success) } else { - Ok(ReturnCode::KeyNotFound) + Ok(ReturnErrorCode::KeyNotFound) } } /// Retrieve the code hash of the currently executing contract. - /// - /// # Parameters - /// - /// - `out_ptr`: pointer to the linear memory where the returning value is written to. - /// - `out_len_ptr`: in-out pointer into linear memory where the buffer length is read from and - /// the value length is written to. + /// See [`pallet_contracts_uapi::HostFn::own_code_hash`]. #[prefixed_alias] fn own_code_hash(ctx: _, memory: _, out_ptr: u32, out_len_ptr: u32) -> Result<(), TrapReason> { ctx.charge_gas(RuntimeCosts::OwnCodeHash)?; @@ -1928,15 +1534,7 @@ pub mod env { } /// Checks whether the caller of the current contract is the origin of the whole call stack. - /// - /// Prefer this over [`is_contract()`][`Self::is_contract`] when checking whether your contract - /// is being called by a contract or a plain account. The reason is that it performs better - /// since it does not need to do any storage lookups. - /// - /// A return value of `true` indicates that this contract is being called by a plain account - /// and `false` indicates that the caller is another contract. - /// - /// Returned value is a `u32`-encoded boolean: (`0 = false`, `1 = true`). + /// See [`pallet_contracts_uapi::HostFn::caller_is_origin`]. #[prefixed_alias] fn caller_is_origin(ctx: _, _memory: _) -> Result { ctx.charge_gas(RuntimeCosts::CallerIsOrigin)?; @@ -1944,14 +1542,7 @@ pub mod env { } /// Checks whether the caller of the current contract is root. - /// - /// Note that only the origin of the call stack can be root. Hence this function returning - /// `true` implies that the contract is being called by the origin. - /// - /// A return value of `true` indicates that this contract is being called by a root origin, - /// and `false` indicates that the caller is a signed origin. - /// - /// Returned value is a `u32`-encoded boolean: (`0 = false`, `1 = true`). + /// See [`pallet_contracts_uapi::HostFn::caller_is_root`]. #[unstable] fn caller_is_root(ctx: _, _memory: _) -> Result { ctx.charge_gas(RuntimeCosts::CallerIsRoot)?; @@ -1959,11 +1550,7 @@ pub mod env { } /// Stores the address of the current contract into the supplied buffer. - /// - /// The value is stored to linear memory at the address pointed to by `out_ptr`. - /// `out_len_ptr` must point to a u32 value that describes the available space at - /// `out_ptr`. This call overwrites it with the size of the value. If the available - /// space at `out_ptr` is less than the size of the value a trap is triggered. + /// See [`pallet_contracts_uapi::HostFn::address`]. #[prefixed_alias] fn address(ctx: _, memory: _, out_ptr: u32, out_len_ptr: u32) -> Result<(), TrapReason> { ctx.charge_gas(RuntimeCosts::Address)?; @@ -1978,10 +1565,7 @@ pub mod env { } /// Stores the price for the specified amount of gas into the supplied buffer. - /// - /// Equivalent to the newer [`seal1`][`super::api_doc::Version2::weight_to_fee`] version but - /// works with *ref_time* Weight only. It is recommended to switch to the latest version, once - /// it's stabilized. + /// See [`pallet_contracts_uapi::HostFn::weight_to_fee`]. #[prefixed_alias] fn weight_to_fee( ctx: _, @@ -2003,21 +1587,7 @@ pub mod env { } /// Stores the price for the specified amount of weight into the supplied buffer. - /// - /// # Parameters - /// - /// - `out_ptr`: pointer to the linear memory where the returning value is written to. If the - /// available space at `out_ptr` is less than the size of the value a trap is triggered. - /// - `out_len_ptr`: in-out pointer into linear memory where the buffer length is read from and - /// the value length is written to. - /// - /// The data is encoded as `T::Balance`. - /// - /// # Note - /// - /// It is recommended to avoid specifying very small values for `ref_time_limit` and - /// `proof_size_limit` as the prices for a single gas can be smaller than the basic balance - /// unit. + /// See [`pallet_contracts_uapi::HostFn::weight_to_fee_v1`]. #[version(1)] #[unstable] fn weight_to_fee( @@ -2041,10 +1611,7 @@ pub mod env { } /// Stores the weight left into the supplied buffer. - /// - /// Equivalent to the newer [`seal1`][`super::api_doc::Version2::gas_left`] version but - /// works with *ref_time* Weight only. It is recommended to switch to the latest version, once - /// it's stabilized. + /// See [`pallet_contracts_uapi::HostFn::gas_left`]. #[prefixed_alias] fn gas_left(ctx: _, memory: _, out_ptr: u32, out_len_ptr: u32) -> Result<(), TrapReason> { ctx.charge_gas(RuntimeCosts::GasLeft)?; @@ -2060,13 +1627,7 @@ pub mod env { } /// Stores the amount of weight left into the supplied buffer. - /// - /// The value is stored to linear memory at the address pointed to by `out_ptr`. - /// `out_len_ptr` must point to a u32 value that describes the available space at - /// `out_ptr`. This call overwrites it with the size of the value. If the available - /// space at `out_ptr` is less than the size of the value a trap is triggered. - /// - /// The data is encoded as Weight. + /// See [`pallet_contracts_uapi::HostFn::gas_left_v1`]. #[version(1)] #[unstable] fn gas_left(ctx: _, memory: _, out_ptr: u32, out_len_ptr: u32) -> Result<(), TrapReason> { @@ -2083,13 +1644,7 @@ pub mod env { } /// Stores the *free* balance of the current account into the supplied buffer. - /// - /// The value is stored to linear memory at the address pointed to by `out_ptr`. - /// `out_len_ptr` must point to a u32 value that describes the available space at - /// `out_ptr`. This call overwrites it with the size of the value. If the available - /// space at `out_ptr` is less than the size of the value a trap is triggered. - /// - /// The data is encoded as `T::Balance`. + /// See [`pallet_contracts_uapi::HostFn::balance`]. #[prefixed_alias] fn balance(ctx: _, memory: _, out_ptr: u32, out_len_ptr: u32) -> Result<(), TrapReason> { ctx.charge_gas(RuntimeCosts::Balance)?; @@ -2104,13 +1659,7 @@ pub mod env { } /// Stores the value transferred along with this call/instantiate into the supplied buffer. - /// - /// The value is stored to linear memory at the address pointed to by `out_ptr`. - /// `out_len_ptr` must point to a `u32` value that describes the available space at - /// `out_ptr`. This call overwrites it with the size of the value. If the available - /// space at `out_ptr` is less than the size of the value a trap is triggered. - /// - /// The data is encoded as `T::Balance`. + /// See [`pallet_contracts_uapi::HostFn::value_transferred`]. #[prefixed_alias] fn value_transferred( ctx: _, @@ -2210,11 +1759,7 @@ pub mod env { } /// Load the latest block timestamp into the supplied buffer - /// - /// The value is stored to linear memory at the address pointed to by `out_ptr`. - /// `out_len_ptr` must point to a u32 value that describes the available space at - /// `out_ptr`. This call overwrites it with the size of the value. If the available - /// space at `out_ptr` is less than the size of the value a trap is triggered. + /// See [`pallet_contracts_uapi::HostFn::now`]. #[prefixed_alias] fn now(ctx: _, memory: _, out_ptr: u32, out_len_ptr: u32) -> Result<(), TrapReason> { ctx.charge_gas(RuntimeCosts::Now)?; @@ -2229,8 +1774,7 @@ pub mod env { } /// Stores the minimum balance (a.k.a. existential deposit) into the supplied buffer. - /// - /// The data is encoded as `T::Balance`. + /// See [`pallet_contracts_uapi::HostFn::minimum_balance`]. #[prefixed_alias] fn minimum_balance( ctx: _, @@ -2378,15 +1922,8 @@ pub mod env { )?) } - /// Deposit a contract event with the data buffer and optional list of topics. There is a limit - /// on the maximum number of topics specified by `event_topics`. - /// - /// - `topics_ptr`: a pointer to the buffer of topics encoded as `Vec`. The value of - /// this is ignored if `topics_len` is set to `0`. The topics list can't contain duplicates. - /// - `topics_len`: the length of the topics buffer. Pass 0 if you want to pass an empty - /// vector. - /// - `data_ptr`: a pointer to a raw data buffer which will saved along the event. - /// - `data_len`: the length of the data buffer. + /// Deposit a contract event with the data buffer and optional list of topics. + /// See [pallet_contracts_uapi::HostFn::deposit_event] #[prefixed_alias] fn deposit_event( ctx: _, @@ -2422,11 +1959,7 @@ pub mod env { } /// Stores the current block number of the current contract into the supplied buffer. - /// - /// The value is stored to linear memory at the address pointed to by `out_ptr`. - /// `out_len_ptr` must point to a u32 value that describes the available space at - /// `out_ptr`. This call overwrites it with the size of the value. If the available - /// space at `out_ptr` is less than the size of the value a trap is triggered. + /// See [`pallet_contracts_uapi::HostFn::block_number`]. #[prefixed_alias] fn block_number(ctx: _, memory: _, out_ptr: u32, out_len_ptr: u32) -> Result<(), TrapReason> { ctx.charge_gas(RuntimeCosts::BlockNumber)?; @@ -2441,22 +1974,7 @@ pub mod env { } /// Computes the SHA2 256-bit hash on the given input buffer. - /// - /// Returns the result directly into the given output buffer. - /// - /// # Note - /// - /// - The `input` and `output` buffer may overlap. - /// - The output buffer is expected to hold at least 32 bytes (256 bits). - /// - It is the callers responsibility to provide an output buffer that is large enough to hold - /// the expected amount of bytes returned by the chosen hash function. - /// - /// # Parameters - /// - /// - `input_ptr`: the pointer into the linear memory where the input data is placed. - /// - `input_len`: the length of the input data in bytes. - /// - `output_ptr`: the pointer into the linear memory where the output data is placed. The - /// function will write the result directly into this buffer. + /// See [`pallet_contracts_uapi::HostFn::hash_sha2_256`]. #[prefixed_alias] fn hash_sha2_256( ctx: _, @@ -2472,22 +1990,7 @@ pub mod env { } /// Computes the KECCAK 256-bit hash on the given input buffer. - /// - /// Returns the result directly into the given output buffer. - /// - /// # Note - /// - /// - The `input` and `output` buffer may overlap. - /// - The output buffer is expected to hold at least 32 bytes (256 bits). - /// - It is the callers responsibility to provide an output buffer that is large enough to hold - /// the expected amount of bytes returned by the chosen hash function. - /// - /// # Parameters - /// - /// - `input_ptr`: the pointer into the linear memory where the input data is placed. - /// - `input_len`: the length of the input data in bytes. - /// - `output_ptr`: the pointer into the linear memory where the output data is placed. The - /// function will write the result directly into this buffer. + /// See [`pallet_contracts_uapi::HostFn::hash_keccak_256`]. #[prefixed_alias] fn hash_keccak_256( ctx: _, @@ -2503,22 +2006,7 @@ pub mod env { } /// Computes the BLAKE2 256-bit hash on the given input buffer. - /// - /// Returns the result directly into the given output buffer. - /// - /// # Note - /// - /// - The `input` and `output` buffer may overlap. - /// - The output buffer is expected to hold at least 32 bytes (256 bits). - /// - It is the callers responsibility to provide an output buffer that is large enough to hold - /// the expected amount of bytes returned by the chosen hash function. - /// - /// # Parameters - /// - /// - `input_ptr`: the pointer into the linear memory where the input data is placed. - /// - `input_len`: the length of the input data in bytes. - /// - `output_ptr`: the pointer into the linear memory where the output data is placed. The - /// function will write the result directly into this buffer. + /// See [`pallet_contracts_uapi::HostFn::hash_blake2_256`]. #[prefixed_alias] fn hash_blake2_256( ctx: _, @@ -2534,22 +2022,7 @@ pub mod env { } /// Computes the BLAKE2 128-bit hash on the given input buffer. - /// - /// Returns the result directly into the given output buffer. - /// - /// # Note - /// - /// - The `input` and `output` buffer may overlap. - /// - The output buffer is expected to hold at least 16 bytes (128 bits). - /// - It is the callers responsibility to provide an output buffer that is large enough to hold - /// the expected amount of bytes returned by the chosen hash function. - /// - /// # Parameters - /// - /// - `input_ptr`: the pointer into the linear memory where the input data is placed. - /// - `input_len`: the length of the input data in bytes. - /// - `output_ptr`: the pointer into the linear memory where the output data is placed. The - /// function will write the result directly into this buffer. + /// See [`pallet_contracts_uapi::HostFn::hash_blake2_128`]. #[prefixed_alias] fn hash_blake2_128( ctx: _, @@ -2565,16 +2038,7 @@ pub mod env { } /// Call into the chain extension provided by the chain if any. - /// - /// Handling of the input values is up to the specific chain extension and so is the - /// return value. The extension can decide to use the inputs as primitive inputs or as - /// in/out arguments by interpreting them as pointers. Any caller of this function - /// must therefore coordinate with the chain that it targets. - /// - /// # Note - /// - /// If no chain extension exists the contract will trap with the `NoChainExtension` - /// module error. + /// See [`pallet_contracts_uapi::HostFn::call_chain_extension`]. #[prefixed_alias] fn call_chain_extension( ctx: _, @@ -2627,7 +2091,7 @@ pub mod env { memory: _, str_ptr: u32, str_len: u32, - ) -> Result { + ) -> Result { let str_len = str_len.min(DebugBufferVec::::bound() as u32); ctx.charge_gas(RuntimeCosts::DebugMessage(str_len))?; if ctx.ext.append_debug_buffer("") { @@ -2636,47 +2100,17 @@ pub mod env { ctx.ext.append_debug_buffer(msg); } } - Ok(ReturnCode::Success) + Ok(ReturnErrorCode::Success) } /// Call some dispatchable of the runtime. - /// - /// This function decodes the passed in data as the overarching `Call` type of the - /// runtime and dispatches it. The weight as specified in the runtime is charged - /// from the gas meter. Any weight refunds made by the dispatchable are considered. - /// - /// The filter specified by `Config::CallFilter` is attached to the origin of - /// the dispatched call. - /// - /// # Parameters - /// - /// - `call_ptr`: the pointer into the linear memory where the input data is placed. - /// - `call_len`: the length of the input data in bytes. - /// - /// # Return Value - /// - /// Returns `ReturnCode::Success` when the dispatchable was successfully executed and - /// returned `Ok`. When the dispatchable was executed but returned an error - /// `ReturnCode::CallRuntimeFailed` is returned. The full error is not - /// provided because it is not guaranteed to be stable. - /// - /// # Comparison with `ChainExtension` - /// - /// Just as a chain extension this API allows the runtime to extend the functionality - /// of contracts. While making use of this function is generally easier it cannot be - /// used in all cases. Consider writing a chain extension if you need to do perform - /// one of the following tasks: - /// - /// - Return data. - /// - Provide functionality **exclusively** to contracts. - /// - Provide custom weights. - /// - Avoid the need to keep the `Call` data structure stable. + /// See [`frame_support::traits::call_runtime`]. fn call_runtime( ctx: _, memory: _, call_ptr: u32, call_len: u32, - ) -> Result { + ) -> Result { use frame_support::dispatch::GetDispatchInfo; ctx.charge_gas(RuntimeCosts::CopyFromContract(call_len))?; let call: ::RuntimeCall = @@ -2687,21 +2121,7 @@ pub mod env { } /// Execute an XCM program locally, using the contract's address as the origin. - /// This is equivalent to dispatching `pallet_xcm::execute` through call_runtime, except that - /// the function is called directly instead of being dispatched. - /// - /// # Parameters - /// - /// - `msg_ptr`: the pointer into the linear memory where the [`xcm::prelude::VersionedXcm`] is - /// placed. - /// - `msg_len`: the length of the message in bytes. - /// - `output_ptr`: the pointer into the linear memory where the [`xcm::prelude::Outcome`] - /// message id is placed. - /// - /// # Return Value - /// - /// Returns `ReturnCode::Success` when the XCM was successfully executed. When the XCM - /// execution fails, `ReturnCode::XcmExecutionFailed` is returned. + /// See [`pallet_contracts_uapi::HostFn::execute_xcm`]. #[unstable] fn xcm_execute( ctx: _, @@ -2709,7 +2129,7 @@ pub mod env { msg_ptr: u32, msg_len: u32, output_ptr: u32, - ) -> Result { + ) -> Result { use frame_support::dispatch::DispatchInfo; use xcm::VersionedXcm; use xcm_builder::{ExecuteController, ExecuteControllerWeightInfo}; @@ -2740,23 +2160,7 @@ pub mod env { } /// Send an XCM program from the contract to the specified destination. - /// This is equivalent to dispatching `pallet_xcm::send` through `call_runtime`, except that - /// the function is called directly instead of being dispatched. - /// - /// # Parameters - /// - /// - `dest_ptr`: the pointer into the linear memory where the - /// [`xcm::prelude::VersionedMultiLocation`] is placed. - /// - `msg_ptr`: the pointer into the linear memory where the [`xcm::prelude::VersionedXcm`] is - /// placed. - /// - `msg_len`: the length of the message in bytes. - /// - `output_ptr`: the pointer into the linear memory where the [`xcm::v3::XcmHash`] message id - /// is placed. - /// - /// # Return Value - /// - /// Returns `ReturnCode::Success` when the message was successfully sent. When the XCM - /// execution fails, `ReturnCode::CallRuntimeFailed` is returned. + /// See [`pallet_contracts_uapi::HostFn::send_xcm`]. #[unstable] fn xcm_send( ctx: _, @@ -2765,7 +2169,7 @@ pub mod env { msg_ptr: u32, msg_len: u32, output_ptr: u32, - ) -> Result { + ) -> Result { use xcm::{VersionedMultiLocation, VersionedXcm}; use xcm_builder::{SendController, SendControllerWeightInfo}; @@ -2781,35 +2185,20 @@ pub mod env { match <::Xcm>::send(origin, dest.into(), message.into()) { Ok(message_id) => { ctx.write_sandbox_memory(memory, output_ptr, &message_id.encode())?; - Ok(ReturnCode::Success) + Ok(ReturnErrorCode::Success) }, Err(e) => { if ctx.ext.append_debug_buffer("") { ctx.ext.append_debug_buffer("seal0::xcm_send failed with: "); ctx.ext.append_debug_buffer(e.into()); }; - Ok(ReturnCode::XcmSendFailed) + Ok(ReturnErrorCode::XcmSendFailed) }, } } /// Recovers the ECDSA public key from the given message hash and signature. - /// - /// Writes the public key into the given output buffer. - /// Assumes the secp256k1 curve. - /// - /// # Parameters - /// - /// - `signature_ptr`: the pointer into the linear memory where the signature is placed. Should - /// be decodable as a 65 bytes. Traps otherwise. - /// - `message_hash_ptr`: the pointer into the linear memory where the message hash is placed. - /// Should be decodable as a 32 bytes. Traps otherwise. - /// - `output_ptr`: the pointer into the linear memory where the output data is placed. The - /// buffer should be 33 bytes. The function will write the result directly into this buffer. - /// - /// # Errors - /// - /// - `ReturnCode::EcdsaRecoverFailed` + /// See [`pallet_contracts_uapi::HostFn::ecdsa_recover`]. #[prefixed_alias] fn ecdsa_recover( ctx: _, @@ -2817,7 +2206,7 @@ pub mod env { signature_ptr: u32, message_hash_ptr: u32, output_ptr: u32, - ) -> Result { + ) -> Result { ctx.charge_gas(RuntimeCosts::EcdsaRecovery)?; let mut signature: [u8; 65] = [0; 65]; @@ -2833,26 +2222,14 @@ pub mod env { // buffer. ctx.write_sandbox_memory(memory, output_ptr, pub_key.as_ref())?; - Ok(ReturnCode::Success) + Ok(ReturnErrorCode::Success) }, - Err(_) => Ok(ReturnCode::EcdsaRecoverFailed), + Err(_) => Ok(ReturnErrorCode::EcdsaRecoveryFailed), } } /// Verify a sr25519 signature - /// - /// # Parameters - /// - /// - `signature_ptr`: the pointer into the linear memory where the signature is placed. Should - /// be a value of 64 bytes. - /// - `pub_key_ptr`: the pointer into the linear memory where the public key is placed. Should - /// be a value of 32 bytes. - /// - `message_len`: the length of the message payload. - /// - `message_ptr`: the pointer into the linear memory where the message is placed. - /// - /// # Errors - /// - /// - `ReturnCode::Sr25519VerifyFailed + /// See [`pallet_contracts_uapi::HostFn::sr25519_verify`]. #[unstable] fn sr25519_verify( ctx: _, @@ -2861,7 +2238,7 @@ pub mod env { pub_key_ptr: u32, message_len: u32, message_ptr: u32, - ) -> Result { + ) -> Result { ctx.charge_gas(RuntimeCosts::Sr25519Verify(message_len))?; let mut signature: [u8; 64] = [0; 64]; @@ -2873,41 +2250,16 @@ pub mod env { let message: Vec = ctx.read_sandbox_memory(memory, message_ptr, message_len)?; if ctx.ext.sr25519_verify(&signature, &message, &pub_key) { - Ok(ReturnCode::Success) + Ok(ReturnErrorCode::Success) } else { - Ok(ReturnCode::Sr25519VerifyFailed) + Ok(ReturnErrorCode::Sr25519VerifyFailed) } } /// Replace the contract code at the specified address with new code. - /// - /// # Note - /// - /// There are a couple of important considerations which must be taken into account when - /// using this API: - /// - /// 1. The storage at the code address will remain untouched. This means that contract - /// developers must ensure that the storage layout of the new code is compatible with that of - /// the old code. - /// - /// 2. Contracts using this API can't be assumed as having deterministic addresses. Said another - /// way, when using this API you lose the guarantee that an address always identifies a specific - /// code hash. - /// - /// 3. If a contract calls into itself after changing its code the new call would use - /// the new code. However, if the original caller panics after returning from the sub call it - /// would revert the changes made by [`set_code_hash()`][`Self::set_code_hash`] and the next - /// caller would use the old code. - /// - /// # Parameters - /// - /// - `code_hash_ptr`: A pointer to the buffer that contains the new code hash. - /// - /// # Errors - /// - /// - `ReturnCode::CodeNotFound` + /// See [`pallet_contracts_uapi::HostFn::set_code_hash`]. #[prefixed_alias] - fn set_code_hash(ctx: _, memory: _, code_hash_ptr: u32) -> Result { + fn set_code_hash(ctx: _, memory: _, code_hash_ptr: u32) -> Result { ctx.charge_gas(RuntimeCosts::SetCodeHash)?; let code_hash: CodeHash<::T> = ctx.read_sandbox_memory_as(memory, code_hash_ptr)?; @@ -2916,33 +2268,19 @@ pub mod env { let code = Runtime::::err_into_return_code(err)?; Ok(code) }, - Ok(()) => Ok(ReturnCode::Success), + Ok(()) => Ok(ReturnErrorCode::Success), } } /// Calculates Ethereum address from the ECDSA compressed public key and stores - /// it into the supplied buffer. - /// - /// # Parameters - /// - /// - `key_ptr`: a pointer to the ECDSA compressed public key. Should be decodable as a 33 bytes - /// value. Traps otherwise. - /// - `out_ptr`: the pointer into the linear memory where the output data is placed. The - /// function will write the result directly into this buffer. - /// - /// The value is stored to linear memory at the address pointed to by `out_ptr`. - /// If the available space at `out_ptr` is less than the size of the value a trap is triggered. - /// - /// # Errors - /// - /// - `ReturnCode::EcdsaRecoverFailed` + /// See [`pallet_contracts_uapi::HostFn::ecdsa_to_eth_address`]. #[prefixed_alias] fn ecdsa_to_eth_address( ctx: _, memory: _, key_ptr: u32, out_ptr: u32, - ) -> Result { + ) -> Result { ctx.charge_gas(RuntimeCosts::EcdsaToEthAddress)?; let mut compressed_key: [u8; 33] = [0; 33]; ctx.read_sandbox_memory_into_buf(memory, key_ptr, &mut compressed_key)?; @@ -2950,18 +2288,15 @@ pub mod env { match result { Ok(eth_address) => { ctx.write_sandbox_memory(memory, out_ptr, eth_address.as_ref())?; - Ok(ReturnCode::Success) + Ok(ReturnErrorCode::Success) }, - Err(_) => Ok(ReturnCode::EcdsaRecoverFailed), + Err(_) => Ok(ReturnErrorCode::EcdsaRecoveryFailed), } } /// Returns the number of times the currently executing contract exists on the call stack in /// addition to the calling instance. - /// - /// # Return Value - /// - /// Returns `0` when there is no reentrancy. + /// See [`pallet_contracts_uapi::HostFn::reentrance_count`]. #[unstable] fn reentrance_count(ctx: _, memory: _) -> Result { ctx.charge_gas(RuntimeCosts::ReentrantCount)?; @@ -2970,14 +2305,7 @@ pub mod env { /// Returns the number of times specified contract exists on the call stack. Delegated calls are /// not counted as separate calls. - /// - /// # Parameters - /// - /// - `account_ptr`: a pointer to the contract address. - /// - /// # Return Value - /// - /// Returns `0` when the contract does not exist on the call stack. + /// See [`pallet_contracts_uapi::HostFn::account_reentrance_count`]. #[unstable] fn account_reentrance_count(ctx: _, memory: _, account_ptr: u32) -> Result { ctx.charge_gas(RuntimeCosts::AccountEntranceCount)?; @@ -2987,19 +2315,14 @@ pub mod env { } /// Returns a nonce that is unique per contract instantiation. - /// - /// The nonce is incremented for each successful contract instantiation. This is a - /// sensible default salt for contract instantiations. + /// See [`pallet_contracts_uapi::HostFn::instantiation_nonce`]. fn instantiation_nonce(ctx: _, _memory: _) -> Result { ctx.charge_gas(RuntimeCosts::InstantationNonce)?; Ok(ctx.ext.nonce()) } /// Adds a new delegate dependency to the contract. - /// - /// # Parameters - /// - /// - `code_hash_ptr`: A pointer to the code hash of the dependency. + /// See [`pallet_contracts_uapi::HostFn::add_delegate_dependency`]. #[unstable] fn add_delegate_dependency(ctx: _, memory: _, code_hash_ptr: u32) -> Result<(), TrapReason> { ctx.charge_gas(RuntimeCosts::AddDelegateDependency)?; @@ -3009,10 +2332,7 @@ pub mod env { } /// Removes the delegate dependency from the contract. - /// - /// # Parameters - /// - /// - `code_hash_ptr`: A pointer to the code hash of the dependency. + /// see [`pallet_contracts_uapi::HostFn::remove_delegate_dependency`]. #[unstable] fn remove_delegate_dependency(ctx: _, memory: _, code_hash_ptr: u32) -> Result<(), TrapReason> { ctx.charge_gas(RuntimeCosts::RemoveDelegateDependency)?; diff --git a/substrate/frame/contracts/uapi/Cargo.toml b/substrate/frame/contracts/uapi/Cargo.toml new file mode 100644 index 000000000000..6717d574dfed --- /dev/null +++ b/substrate/frame/contracts/uapi/Cargo.toml @@ -0,0 +1,23 @@ +[package] +name = "pallet-contracts-uapi" +version = "4.0.0-dev" +authors.workspace = true +edition.workspace = true +license = "Apache-2.0" +homepage = "https://substrate.io" +repository.workspace = true +description = "Exposes all the host functions that a contract can import." + +[dependencies] +paste = { version = "1.0", default-features = false } +bitflags = "1.0" +scale-info = { version = "2.10.0", default-features = false, features = ["derive"], optional = true } +scale = { package = "parity-scale-codec", version = "3.6.1", default-features = false, features = [ + "derive", + "max-encoded-len", +], optional = true } + +[features] +default = [ "scale" ] +scale = [ "dep:scale", "scale-info" ] + diff --git a/substrate/frame/contracts/uapi/src/flags.rs b/substrate/frame/contracts/uapi/src/flags.rs new file mode 100644 index 000000000000..32553817fb7a --- /dev/null +++ b/substrate/frame/contracts/uapi/src/flags.rs @@ -0,0 +1,73 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: Apache-2.0 + +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +use bitflags::bitflags; + +bitflags! { + /// Flags used by a contract to customize exit behaviour. + #[cfg_attr(feature = "scale", derive(scale::Encode, scale::Decode, scale_info::TypeInfo))] + pub struct ReturnFlags: u32 { + /// If this bit is set all changes made by the contract execution are rolled back. + const REVERT = 0x0000_0001; + } +} + +bitflags! { + /// Flags used to change the behaviour of `seal_call` and `seal_delegate_call`. + pub struct CallFlags: u32 { + /// Forward the input of current function to the callee. + /// + /// Supplied input pointers are ignored when set. + /// + /// # Note + /// + /// A forwarding call will consume the current contracts input. Any attempt to + /// access the input after this call returns will lead to [`Error::InputForwarded`]. + /// It does not matter if this is due to calling `seal_input` or trying another + /// forwarding call. Consider using [`Self::CLONE_INPUT`] in order to preserve + /// the input. + const FORWARD_INPUT = 0b0000_0001; + /// Identical to [`Self::FORWARD_INPUT`] but without consuming the input. + /// + /// This adds some additional weight costs to the call. + /// + /// # Note + /// + /// This implies [`Self::FORWARD_INPUT`] and takes precedence when both are set. + const CLONE_INPUT = 0b0000_0010; + /// Do not return from the call but rather return the result of the callee to the + /// callers caller. + /// + /// # Note + /// + /// This makes the current contract completely transparent to its caller by replacing + /// this contracts potential output by the callee ones. Any code after `seal_call` + /// can be safely considered unreachable. + const TAIL_CALL = 0b0000_0100; + /// Allow the callee to reenter into the current contract. + /// + /// Without this flag any reentrancy into the current contract that originates from + /// the callee (or any of its callees) is denied. This includes the first callee: + /// You cannot call into yourself with this flag set. + /// + /// # Note + /// + /// For `seal_delegate_call` should be always unset, otherwise + /// [`Error::InvalidCallFlags`] is returned. + const ALLOW_REENTRY = 0b0000_1000; + } +} diff --git a/substrate/frame/contracts/uapi/src/host.rs b/substrate/frame/contracts/uapi/src/host.rs new file mode 100644 index 000000000000..f8b55d3822e9 --- /dev/null +++ b/substrate/frame/contracts/uapi/src/host.rs @@ -0,0 +1,793 @@ +// Copyright (C) Parity Technologies (UK) Ltd. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +use crate::{CallFlags, Result, ReturnFlags, SENTINEL}; +use paste::paste; + +#[cfg(target_arch = "wasm32")] +mod wasm32; + +#[cfg(target_arch = "riscv32")] +mod riscv32; + +macro_rules! hash_fn { + ( $name:ident, $bytes:literal ) => { + paste! { + #[doc = "Computes the " $name " " $bytes "-bit hash on the given input buffer."] + #[doc = "\n# Notes\n"] + #[doc = "- The `input` and `output` buffer may overlap."] + #[doc = "- The output buffer is expected to hold at least " $bytes " bits."] + #[doc = "- It is the callers responsibility to provide an output buffer that is large enough to hold the expected amount of bytes returned by the hash function."] + #[doc = "\n# Parameters\n"] + #[doc = "- `input`: The input data buffer."] + #[doc = "- `output`: The output buffer to write the hash result to."] + fn [](input: &[u8], output: &mut [u8; $bytes]); + } + }; +} + +fn extract_from_slice(output: &mut &mut [u8], new_len: usize) { + debug_assert!(new_len <= output.len()); + let tmp = core::mem::take(output); + *output = &mut tmp[..new_len]; +} + +fn ptr_len_or_sentinel(data: &mut Option<&mut [u8]>) -> (*mut u8, u32) { + match data { + Some(ref mut data) => (data.as_mut_ptr(), data.len() as _), + None => (SENTINEL as _, 0), + } +} + +fn ptr_or_sentinel(data: &Option<&[u8]>) -> *const u8 { + match data { + Some(ref data) => data.as_ptr(), + None => SENTINEL as _, + } +} + +/// Implements [`HostFn`] for each supported target architecture. +pub enum HostFnImpl {} + +/// Defines all the host apis implemented by both wasm and RISC-V vms. +pub trait HostFn { + /// Returns the number of times specified contract exists on the call stack. Delegated calls are + /// not counted as separate calls. + /// + /// # Parameters + /// + /// - `account`: The contract address. Should be decodable as an `T::AccountId`. Traps + /// otherwise. + /// + /// # Return + /// + /// Returns the number of times specified contract exists on the call stack. + #[deprecated( + note = "Unstable function. Behaviour can change without further notice. Use only for testing." + )] + fn account_reentrance_count(account: &[u8]) -> u32; + + /// Stores the address of the current contract into the supplied buffer. + /// + /// If the available space in `output` is less than the size of the value a trap is triggered. + /// + /// # Parameters + /// + /// - `output`: A reference to the output data buffer to write the address. + fn address(output: &mut &mut [u8]); + + /// Adds a new delegate dependency to the contract. + /// + /// Traps if the maximum number of delegate_dependencies is reached or if + /// the delegate dependency already exists. + /// + /// # Parameters + /// + /// - `code_hash`: The code hash of the dependency. Should be decodable as an `T::Hash`. Traps + /// otherwise. + #[deprecated( + note = "Unstable function. Behaviour can change without further notice. Use only for testing." + )] + fn add_delegate_dependency(code_hash: &[u8]); + + /// Stores the *free* balance of the current account into the supplied buffer. + /// + /// If the available space in `output` is less than the size of the value a trap is triggered. + /// + /// # Parameters + /// + /// - `output`: A reference to the output data buffer to write the balance. + fn balance(output: &mut &mut [u8]); + + /// Stores the current block number of the current contract into the supplied buffer. + /// + /// If the available space in `output` is less than the size of the value a trap is triggered. + /// + /// # Parameters + /// + /// - `output`: A reference to the output data buffer to write the block number. + fn block_number(output: &mut &mut [u8]); + + /// Make a call to another contract. + /// + /// This is equivalent to calling the newer version of this function with + /// `flags` set to [`CallFlags::ALLOW_REENTRY`]. See the newer version for documentation. + #[deprecated(note = "Deprecated, use newer version instead")] + fn call( + callee: &[u8], + gas: u64, + value: &[u8], + input_data: &[u8], + output: Option<&mut [u8]>, + ) -> Result; + + /// Make a call to another contract. + /// + /// Equivalent to the newer [`Self::call_v2`] version but works with + /// *ref_time* Weight only + fn call_v1( + flags: CallFlags, + callee: &[u8], + gas: u64, + value: &[u8], + input_data: &[u8], + output: Option<&mut [u8]>, + ) -> Result; + + /// Call (possibly transferring some amount of funds) into the specified account. + /// + /// # Parameters + /// + /// - `flags`: See [`CallFlags`] for a documentation of the supported flags. + /// - `callee`: The address of the callee. Should be decodable as an `T::AccountId`. Traps + /// otherwise. + /// - `ref_time_limit`: how much *ref_time* Weight to devote to the execution. + /// - `proof_size_limit`: how much *proof_size* Weight to devote to the execution. + /// - `deposit`: The storage deposit limit for instantiation. Should be decodable as a + /// `Option`. Traps otherwise. Passing `None` means setting no specific limit for + /// the call, which implies storage usage up to the limit of the parent call. + /// - `value`: The value to transfer into the contract. Should be decodable as a `T::Balance`. + /// Traps otherwise. + /// - `input`: The input data buffer used to call the contract. + /// - `output`: A reference to the output data buffer to write the call output buffer. If `None` + /// is provided then the output buffer is not copied. + /// + /// # Errors + /// + /// An error means that the call wasn't successful output buffer is returned unless + /// stated otherwise. + /// + /// - [CalleeReverted][`crate::ReturnErrorCode::CalleeReverted]: Output buffer is returned. + /// - [CalleeTrapped][`crate::ReturnErrorCode::CalleeTrapped] + /// - [TransferFailed][`crate::ReturnErrorCode::TransferFailed] + /// - [NotCallable][`crate::ReturnErrorCode::NotCallable] + #[deprecated( + note = "Unstable function. Behaviour can change without further notice. Use only for testing." + )] + fn call_v2( + flags: CallFlags, + callee: &[u8], + ref_time_limit: u64, + proof_time_limit: u64, + deposit: Option<&[u8]>, + value: &[u8], + input_data: &[u8], + output: Option<&mut [u8]>, + ) -> Result; + + /// Call into the chain extension provided by the chain if any. + /// + /// Handling of the input values is up to the specific chain extension and so is the + /// return value. The extension can decide to use the inputs as primitive inputs or as + /// in/out arguments by interpreting them as pointers. Any caller of this function + /// must therefore coordinate with the chain that it targets. + /// + /// # Note + /// + /// If no chain extension exists the contract will trap with the `NoChainExtension` + /// module error. + /// + /// # Parameters + /// + /// - `func_id`: The function id of the chain extension. + /// - `input`: The input data buffer. + /// - `output`: A reference to the output data buffer to write the output data. + /// + /// # Return + /// + /// The chain extension returned value, if executed successfully. + fn call_chain_extension(func_id: u32, input: &[u8], output: &mut &mut [u8]) -> u32; + + /// Call some dispatchable of the runtime. + /// + /// # Parameters + /// + /// - `call`: The call data. + /// + /// # Return + /// + /// Returns `Error::Success` when the dispatchable was successfully executed and + /// returned `Ok`. When the dispatchable was executed but returned an error + /// `Error::CallRuntimeFailed` is returned. The full error is not + /// provided because it is not guaranteed to be stable. + /// + /// # Comparison with `ChainExtension` + /// + /// Just as a chain extension this API allows the runtime to extend the functionality + /// of contracts. While making use of this function is generally easier it cannot be + /// used in all cases. Consider writing a chain extension if you need to do perform + /// one of the following tasks: + /// + /// - Return data. + /// - Provide functionality **exclusively** to contracts. + /// - Provide custom weights. + /// - Avoid the need to keep the `Call` data structure stable. + fn call_runtime(call: &[u8]) -> Result; + + /// Stores the address of the caller into the supplied buffer. + /// + /// If the available space in `output` is less than the size of the value a trap is triggered. + /// + /// If this is a top-level call (i.e. initiated by an extrinsic) the origin address of the + /// extrinsic will be returned. Otherwise, if this call is initiated by another contract then + /// the address of the contract will be returned. + /// + /// If there is no address associated with the caller (e.g. because the caller is root) then + /// it traps with `BadOrigin`. + /// + /// # Parameters + /// + /// - `output`: A reference to the output data buffer to write the caller address. + fn caller(output: &mut &mut [u8]); + + /// Checks whether the caller of the current contract is the origin of the whole call stack. + /// + /// Prefer this over [`is_contract()`][`Self::is_contract`] when checking whether your contract + /// is being called by a contract or a plain account. The reason is that it performs better + /// since it does not need to do any storage lookups. + /// + /// # Return + /// + /// A return value of `true` indicates that this contract is being called by a plain account + /// and `false` indicates that the caller is another contract. + fn caller_is_origin() -> bool; + + /// Checks whether the caller of the current contract is root. + /// + /// Note that only the origin of the call stack can be root. Hence this function returning + /// `true` implies that the contract is being called by the origin. + /// + /// A return value of `true` indicates that this contract is being called by a root origin, + /// and `false` indicates that the caller is a signed origin. + #[deprecated( + note = "Unstable function. Behaviour can change without further notice. Use only for testing." + )] + fn caller_is_root() -> u32; + + /// Clear the value at the given key in the contract storage. + /// + /// Equivalent to the newer [`Self::clear_storage_v1`] version with + /// the exception of the return type. Still a valid thing to call when not interested in the + /// return value. + fn clear_storage(key: &[u8]); + + /// Clear the value at the given key in the contract storage. + /// + /// # Parameters + /// + /// - `key`: The storage key. + /// + /// # Return + /// + /// Returns the size of the pre-existing value at the specified key if any. + fn clear_storage_v1(key: &[u8]) -> Option; + + /// Retrieve the code hash for a specified contract address. + /// + /// # Parameters + /// + /// - `account_id`: The address of the contract.Should be decodable as an `T::AccountId`. Traps + /// otherwise. + /// - `output`: A reference to the output data buffer to write the code hash. + /// + /// + /// # Errors + /// + /// - [CodeNotFound][`crate::ReturnErrorCode::CodeNotFound] + fn code_hash(account_id: &[u8], output: &mut [u8]) -> Result; + + /// Checks whether there is a value stored under the given key. + /// + /// This version is to be used with a fixed sized storage key. For runtimes supporting + /// transparent hashing, please use the newer version of this function. + fn contains_storage(key: &[u8]) -> Option; + + /// Checks whether there is a value stored under the given key. + /// + /// The key length must not exceed the maximum defined by the contracts module parameter. + /// + /// # Parameters + /// - `key`: The storage key. + /// + /// # Return + /// + /// Returns the size of the pre-existing value at the specified key if any. + fn contains_storage_v1(key: &[u8]) -> Option; + + /// Execute code in the context (storage, caller, value) of the current contract. + /// + /// Reentrancy protection is always disabled since the callee is allowed + /// to modify the callers storage. This makes going through a reentrancy attack + /// unnecessary for the callee when it wants to exploit the caller. + /// + /// # Parameters + /// + /// - `flags`: See [`CallFlags`] for a documentation of the supported flags. + /// - `code_hash`: The hash of the code to be executed. + /// - `input`: The input data buffer used to call the contract. + /// - `output`: A reference to the output data buffer to write the call output buffer. If `None` + /// is provided then the output buffer is not copied. + /// + /// # Errors + /// + /// An error means that the call wasn't successful and no output buffer is returned unless + /// stated otherwise. + /// + /// - [CalleeReverted][`crate::ReturnErrorCode::CalleeReverted]: Output buffer is returned. + /// - [CalleeTrapped][`crate::ReturnErrorCode::CalleeTrapped] + /// - [CodeNotFound][`crate::ReturnErrorCode::CodeNotFound] + fn delegate_call( + flags: CallFlags, + code_hash: &[u8], + input_data: &[u8], + output: Option<&mut [u8]>, + ) -> Result; + + /// Deposit a contract event with the data buffer and optional list of topics. There is a limit + /// on the maximum number of topics specified by `event_topics`. + /// + /// There should not be any duplicates in `topics`. + /// + /// # Parameters + /// + /// - `topics`: The topics list encoded as `Vec`. It can't contain duplicates. + fn deposit_event(topics: &[u8], data: &[u8]); + + /// Recovers the ECDSA public key from the given message hash and signature. + /// + /// Writes the public key into the given output buffer. + /// Assumes the secp256k1 curve. + /// + /// # Parameters + /// + /// - `signature`: The signature bytes. + /// - `message_hash`: The message hash bytes. + /// - `output`: A reference to the output data buffer to write the public key. + /// + /// # Errors + /// + /// - [EcdsaRecoveryFailed][`crate::ReturnErrorCode::EcdsaRecoveryFailed] + fn ecdsa_recover( + signature: &[u8; 65], + message_hash: &[u8; 32], + output: &mut [u8; 33], + ) -> Result; + + /// Calculates Ethereum address from the ECDSA compressed public key and stores + /// it into the supplied buffer. + /// + /// # Parameters + /// + /// - `pubkey`: The public key bytes. + /// - `output`: A reference to the output data buffer to write the address. + /// + /// # Errors + /// + /// - [EcdsaRecoveryFailed][`crate::ReturnErrorCode::EcdsaRecoveryFailed] + fn ecdsa_to_eth_address(pubkey: &[u8; 33], output: &mut [u8; 20]) -> Result; + + /// Stores the weight left into the supplied buffer. + /// + /// Equivalent to the newer [`Self::gas_left_v1`] version but + /// works with *ref_time* Weight only. + fn gas_left(out: &mut &mut [u8]); + + /// Stores the amount of weight left into the supplied buffer. + /// The data is encoded as Weight. + /// + /// If the available space in `output` is less than the size of the value a trap is triggered. + /// + /// # Parameters + /// + /// - `output`: A reference to the output data buffer to write the weight left. + #[deprecated( + note = "Unstable function. Behaviour can change without further notice. Use only for testing." + )] + fn gas_left_v1(output: &mut &mut [u8]); + + /// Retrieve the value under the given key from storage. + /// + /// This version is to be used with a fixed sized storage key. For runtimes supporting + /// transparent hashing, please use the newer version of this function. + fn get_storage(key: &[u8], output: &mut &mut [u8]) -> Result; + + /// Retrieve the value under the given key from storage. + /// + /// The key length must not exceed the maximum defined by the contracts module parameter. + /// + /// # Parameters + /// - `key`: The storage key. + /// - `output`: A reference to the output data buffer to write the storage entry. + /// + /// # Errors + /// + /// [KeyNotFound][`crate::ReturnErrorCode::KeyNotFound] + fn get_storage_v1(key: &[u8], output: &mut &mut [u8]) -> Result; + + hash_fn!(sha2_256, 32); + hash_fn!(keccak_256, 32); + hash_fn!(blake2_256, 32); + hash_fn!(blake2_128, 16); + + /// Stores the input passed by the caller into the supplied buffer. + /// + /// # Note + /// + /// This function traps if: + /// - the input is larger than the available space. + /// - the input was previously forwarded by a [`call()`][`Self::call()`]. + /// + /// # Parameters + /// + /// - `output`: A reference to the output data buffer to write the input data. + fn input(output: &mut &mut [u8]); + + /// Instantiate a contract with the specified code hash. + /// + /// Equivalent to the newer [`Self::instantiate_v2`] version but works + /// with *ref_time* Weight only. + fn instantiate_v1( + code_hash: &[u8], + gas: u64, + value: &[u8], + input: &[u8], + address: Option<&mut [u8]>, + output: Option<&mut [u8]>, + salt: &[u8], + ) -> Result; + + /// Instantiate a contract with the specified code hash. + /// + /// This function creates an account and executes the constructor defined in the code specified + /// by the code hash. + /// + /// # Parameters + /// + /// - `code_hash`: The hash of the code to be instantiated. + /// - `ref_time_limit`: how much *ref_time* Weight to devote to the execution. + /// - `proof_size_limit`: how much *proof_size* Weight to devote to the execution. + /// - `deposit`: The storage deposit limit for instantiation. Should be decodable as a + /// `Option`. Traps otherwise. Passing `None` means setting no specific limit for + /// the call, which implies storage usage up to the limit of the parent call. + /// - `value`: The value to transfer into the contract. Should be decodable as a `T::Balance`. + /// Traps otherwise. + /// - `input`: The input data buffer. + /// - `address`: A reference to the address buffer to write the address of the contract. If + /// `None` is provided then the output buffer is not copied. + /// - `output`: A reference to the return value buffer to write the constructor output buffer. + /// If `None` is provided then the output buffer is not copied. + /// - `salt`: The salt bytes to use for this instantiation. + /// + /// # Errors + /// + /// Please consult the [ReturnErrorCode][`crate::ReturnErrorCode`] enum declaration for more + /// information on those errors. Here we only note things specific to this function. + /// + /// An error means that the account wasn't created and no address or output buffer + /// is returned unless stated otherwise. + /// + /// - [CalleeReverted][`crate::ReturnErrorCode::CalleeReverted]: Output buffer is returned. + /// - [CalleeTrapped][`crate::ReturnErrorCode::CalleeTrapped] + /// - [TransferFailed][`crate::ReturnErrorCode::TransferFailed] + /// - [CodeNotFound][`crate::ReturnErrorCode::CodeNotFound] + #[deprecated( + note = "Unstable function. Behaviour can change without further notice. Use only for testing." + )] + fn instantiate_v2( + code_hash: &[u8], + ref_time_limit: u64, + proof_size_limit: u64, + deposit: Option<&[u8]>, + value: &[u8], + input: &[u8], + address: Option<&mut [u8]>, + output: Option<&mut [u8]>, + salt: &[u8], + ) -> Result; + + /// Returns a nonce that is unique per contract instantiation. + /// + /// The nonce is incremented for each successful contract instantiation. This is a + /// sensible default salt for contract instantiations. + fn instantiation_nonce() -> u64; + + /// Checks whether a specified address belongs to a contract. + /// + /// # Parameters + /// + /// - `account_id`: The address to check. Should be decodable as an `T::AccountId`. Traps + /// otherwise. + /// + /// # Return + /// + /// Returns `true` if the address belongs to a contract. + fn is_contract(account_id: &[u8]) -> bool; + + /// Stores the minimum balance (a.k.a. existential deposit) into the supplied buffer. + /// The data is encoded as `T::Balance`. + /// + /// If the available space in `output` is less than the size of the value a trap is triggered. + /// + /// # Parameters + /// + /// - `output`: A reference to the output data buffer to write the minimum balance. + fn minimum_balance(output: &mut &mut [u8]); + + /// Retrieve the code hash of the currently executing contract. + /// + /// # Parameters + /// + /// - `output`: A reference to the output data buffer to write the code hash. + fn own_code_hash(output: &mut [u8]); + + /// Load the latest block timestamp into the supplied buffer + /// + /// If the available space in `output` is less than the size of the value a trap is triggered. + /// + /// # Parameters + /// + /// - `output`: A reference to the output data buffer to write the timestamp. + fn now(output: &mut &mut [u8]); + + /// Returns the number of times the currently executing contract exists on the call stack in + /// addition to the calling instance. + /// + /// # Return + /// + /// Returns `0` when there is no reentrancy. + #[deprecated( + note = "Unstable function. Behaviour can change without further notice. Use only for testing." + )] + fn reentrance_count() -> u32; + + /// Removes the delegate dependency from the contract. + /// + /// Traps if the delegate dependency does not exist. + /// + /// # Parameters + /// + /// - `code_hash`: The code hash of the dependency. Should be decodable as an `T::Hash`. Traps + /// otherwise. + #[deprecated( + note = "Unstable function. Behaviour can change without further notice. Use only for testing." + )] + fn remove_delegate_dependency(code_hash: &[u8]); + + /// Cease contract execution and save a data buffer as a result of the execution. + /// + /// This function never returns as it stops execution of the caller. + /// This is the only way to return a data buffer to the caller. Returning from + /// execution without calling this function is equivalent to calling: + /// ```nocompile + /// return_value(ReturnFlags::empty(), &[]) + /// ``` + /// + /// Using an unnamed non empty `ReturnFlags` triggers a trap. + /// + /// # Parameters + /// + /// - `flags`: Flag used to signal special return conditions to the supervisor. See + /// [`ReturnFlags`] for a documentation of the supported flags. + /// - `return_value`: The return value buffer. + fn return_value(flags: ReturnFlags, return_value: &[u8]) -> !; + + /// Replace the contract code at the specified address with new code. + /// + /// # Note + /// + /// There are a couple of important considerations which must be taken into account when + /// using this API: + /// + /// 1. The storage at the code address will remain untouched. This means that contract + /// developers must ensure that the storage layout of the new code is compatible with that of + /// the old code. + /// + /// 2. Contracts using this API can't be assumed as having deterministic addresses. Said another + /// way, when using this API you lose the guarantee that an address always identifies a specific + /// code hash. + /// + /// 3. If a contract calls into itself after changing its code the new call would use + /// the new code. However, if the original caller panics after returning from the sub call it + /// would revert the changes made by [`set_code_hash()`][`Self::set_code_hash`] and the next + /// caller would use the old code. + /// + /// # Parameters + /// + /// - `code_hash`: The hash of the new code. Should be decodable as an `T::Hash`. Traps + /// otherwise. + /// + /// # Errors + /// + /// - [CodeNotFound][`crate::ReturnErrorCode::CodeNotFound] + fn set_code_hash(code_hash: &[u8]) -> Result; + + /// Set the value at the given key in the contract storage. + /// + /// Equivalent to [`Self::set_storage_v1`] version with the + /// exception of the return type. Still a valid thing to call for fixed sized storage key, when + /// not interested in the return value. + fn set_storage(key: &[u8], value: &[u8]); + + /// Set the value at the given key in the contract storage. + /// + /// This version is to be used with a fixed sized storage key. For runtimes supporting + /// transparent hashing, please use the newer version of this function. + fn set_storage_v1(key: &[u8], value: &[u8]) -> Option; + + /// Set the value at the given key in the contract storage. + /// + /// The key and value lengths must not exceed the maximums defined by the contracts module + /// parameters. + /// + /// # Parameters + /// + /// - `key`: The storage key. + /// - `encoded_value`: The storage value. + /// + /// # Return + /// + /// Returns the size of the pre-existing value at the specified key if any. + fn set_storage_v2(key: &[u8], value: &[u8]) -> Option; + + /// Verify a sr25519 signature + /// + /// # Parameters + /// + /// - `signature`: The signature bytes. + /// - `message`: The message bytes. + /// + /// # Errors + /// + /// - [Sr25519VerifyFailed][`crate::ReturnErrorCode::Sr25519VerifyFailed] + fn sr25519_verify(signature: &[u8; 64], message: &[u8], pub_key: &[u8; 32]) -> Result; + + /// Retrieve and remove the value under the given key from storage. + /// + /// # Parameters + /// - `key`: The storage key. + /// - `output`: A reference to the output data buffer to write the storage entry. + /// + /// # Errors + /// + /// [KeyNotFound][`crate::ReturnErrorCode::KeyNotFound] + fn take_storage(key: &[u8], output: &mut &mut [u8]) -> Result; + + /// Transfer some amount of funds into the specified account. + /// + /// # Parameters + /// + /// - `account_id`: The address of the account to transfer funds to. Should be decodable as an + /// `T::AccountId`. Traps otherwise. + /// - `value`: The value to transfer. Should be decodable as a `T::Balance`. Traps otherwise. + /// + /// # Errors + /// + /// - [TransferFailed][`crate::ReturnErrorCode::TransferFailed] + fn transfer(account_id: &[u8], value: &[u8]) -> Result; + + /// Remove the calling account and transfer remaining balance. + /// + /// This is equivalent to calling the newer version of this function + #[deprecated(note = "Deprecated, use newer version instead")] + fn terminate(beneficiary: &[u8]) -> !; + + /// Remove the calling account and transfer remaining **free** balance. + /// + /// This function never returns. Either the termination was successful and the + /// execution of the destroyed contract is halted. Or it failed during the termination + /// which is considered fatal and results in a trap + rollback. + /// + /// # Parameters + /// + /// - `beneficiary`: The address of the beneficiary account, Should be decodable as an + /// `T::AccountId`. + /// + /// # Traps + /// + /// - The contract is live i.e is already on the call stack. + /// - Failed to send the balance to the beneficiary. + /// - The deletion queue is full. + fn terminate_v1(beneficiary: &[u8]) -> !; + + /// Stores the value transferred along with this call/instantiate into the supplied buffer. + /// The data is encoded as `T::Balance`. + /// + /// If the available space in `output` is less than the size of the value a trap is triggered. + /// + /// # Parameters + /// + /// - `output`: A reference to the output data buffer to write the transferred value. + fn value_transferred(output: &mut &mut [u8]); + + /// Stores the price for the specified amount of gas into the supplied buffer. + /// + /// Equivalent to the newer [`Self::weight_to_fee_v1`] version but + /// works with *ref_time* Weight only. It is recommended to switch to the latest version, once + /// it's stabilized. + fn weight_to_fee(gas: u64, output: &mut &mut [u8]); + + /// Stores the price for the specified amount of gas into the supplied buffer. + /// The data is encoded as `T::Balance`. + /// + /// If the available space in `output` is less than the size of the value a trap is triggered. + /// + /// # Parameters + /// + /// - `ref_time_limit`: The *ref_time* Weight limit to query the price for. + /// - `proof_size_limit`: The *proof_size* Weight limit to query the price for. + /// - `output`: A reference to the output data buffer to write the price. + #[deprecated( + note = "Unstable function. Behaviour can change without further notice. Use only for testing." + )] + fn weight_to_fee_v1(ref_time_limit: u64, proof_size_limit: u64, output: &mut &mut [u8]); + + /// Execute an XCM program locally, using the contract's address as the origin. + /// This is equivalent to dispatching `pallet_xcm::execute` through call_runtime, except that + /// the function is called directly instead of being dispatched. + /// + /// # Parameters + /// + /// - `msg`: The message, should be decodable as a [VersionedXcm](https://paritytech.github.io/polkadot-sdk/master/staging_xcm/enum.VersionedXcm.html), + /// traps otherwise. + /// - `output`: A reference to the output data buffer to write the [Outcome](https://paritytech.github.io/polkadot-sdk/master/staging_xcm/v3/enum.Outcome.html) + /// + /// # Return + /// + /// Returns `Error::Success` when the XCM execution attempt is successful. When the XCM + /// execution fails, `ReturnCode::XcmExecutionFailed` is returned + #[deprecated( + note = "Unstable function. Behaviour can change without further notice. Use only for testing." + )] + fn xcm_execute(msg: &[u8], output: &mut &mut [u8]) -> Result; + + /// Send an XCM program from the contract to the specified destination. + /// This is equivalent to dispatching `pallet_xcm::send` through `call_runtime`, except that + /// the function is called directly instead of being dispatched. + /// + /// # Parameters + /// + /// - `dest`: The XCM destination, should be decodable as [VersionedMultiLocation](https://paritytech.github.io/polkadot-sdk/master/staging_xcm/enum.VersionedMultiLocation.html), + /// traps otherwise. + /// - `msg`: The message, should be decodable as a [VersionedXcm](https://paritytech.github.io/polkadot-sdk/master/staging_xcm/enum.VersionedXcm.html), + /// traps otherwise. + /// - `output`: A reference to the output data buffer to write the [XcmHash](https://paritytech.github.io/polkadot-sdk/master/staging_xcm/v3/type.XcmHash.html) + /// + /// # Return + /// + /// Returns `ReturnCode::Success` when the message was successfully sent. When the XCM + /// execution fails, `ReturnErrorCode::XcmSendFailed` is returned. + #[deprecated( + note = "Unstable function. Behaviour can change without further notice. Use only for testing." + )] + fn xcm_send(dest: &[u8], msg: &[u8], output: &mut &mut [u8]) -> Result; +} diff --git a/substrate/frame/contracts/uapi/src/host/riscv32.rs b/substrate/frame/contracts/uapi/src/host/riscv32.rs new file mode 100644 index 000000000000..f58b8831f06d --- /dev/null +++ b/substrate/frame/contracts/uapi/src/host/riscv32.rs @@ -0,0 +1,14 @@ +// Copyright (C) Parity Technologies (UK) Ltd. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// TODO: bring up to date with wasm32.rs diff --git a/substrate/frame/contracts/uapi/src/host/wasm32.rs b/substrate/frame/contracts/uapi/src/host/wasm32.rs new file mode 100644 index 000000000000..d30058daf3df --- /dev/null +++ b/substrate/frame/contracts/uapi/src/host/wasm32.rs @@ -0,0 +1,811 @@ +// Copyright (C) Parity Technologies (UK) Ltd. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +use super::{ + extract_from_slice, ptr_len_or_sentinel, ptr_or_sentinel, CallFlags, HostFn, HostFnImpl, Result, +}; +use crate::{ReturnCode, ReturnFlags}; + +mod sys { + use super::ReturnCode; + + #[link(wasm_import_module = "seal0")] + extern "C" { + pub fn account_reentrance_count(account_ptr: *const u8) -> u32; + + pub fn add_delegate_dependency(code_hash_ptr: *const u8); + + pub fn address(output_ptr: *mut u8, output_len_ptr: *mut u32); + + pub fn balance(output_ptr: *mut u8, output_len_ptr: *mut u32); + + pub fn block_number(output_ptr: *mut u8, output_len_ptr: *mut u32); + + pub fn call( + callee_ptr: *const u8, + callee_len: u32, + gas: u64, + value_ptr: *const u8, + value_len: u32, + input_data_ptr: *const u8, + input_data_len: u32, + output_ptr: *mut u8, + output_len_ptr: *mut u32, + ) -> ReturnCode; + + pub fn call_chain_extension( + func_id: u32, + input_ptr: *const u8, + input_len: u32, + output_ptr: *mut u8, + output_len_ptr: *mut u32, + ) -> ReturnCode; + + pub fn call_runtime(call_ptr: *const u8, call_len: u32) -> ReturnCode; + + pub fn caller(output_ptr: *mut u8, output_len_ptr: *mut u32); + + pub fn caller_is_origin() -> ReturnCode; + + pub fn caller_is_root() -> ReturnCode; + + pub fn clear_storage(key_ptr: *const u8, key_len: u32) -> ReturnCode; + + pub fn code_hash( + account_id_ptr: *const u8, + output_ptr: *mut u8, + output_len_ptr: *mut u32, + ) -> ReturnCode; + + pub fn contains_storage(key_ptr: *const u8, key_len: u32) -> ReturnCode; + + pub fn delegate_call( + flags: u32, + code_hash_ptr: *const u8, + input_data_ptr: *const u8, + input_data_len: u32, + output_ptr: *mut u8, + output_len_ptr: *mut u32, + ) -> ReturnCode; + + pub fn deposit_event( + topics_ptr: *const u8, + topics_len: u32, + data_ptr: *const u8, + data_len: u32, + ); + + pub fn ecdsa_recover( + signature_ptr: *const u8, + message_hash_ptr: *const u8, + output_ptr: *mut u8, + ) -> ReturnCode; + + pub fn ecdsa_to_eth_address(public_key_ptr: *const u8, output_ptr: *mut u8) -> ReturnCode; + + pub fn gas_left(output_ptr: *mut u8, output_len_ptr: *mut u32); + + pub fn get_storage( + key_ptr: *const u8, + key_len: u32, + out_ptr: *mut u8, + out_len_ptr: *mut u32, + ) -> ReturnCode; + + pub fn hash_blake2_128(input_ptr: *const u8, input_len: u32, output_ptr: *mut u8); + + pub fn hash_blake2_256(input_ptr: *const u8, input_len: u32, output_ptr: *mut u8); + + pub fn hash_keccak_256(input_ptr: *const u8, input_len: u32, output_ptr: *mut u8); + + pub fn hash_sha2_256(input_ptr: *const u8, input_len: u32, output_ptr: *mut u8); + + pub fn input(buf_ptr: *mut u8, buf_len_ptr: *mut u32); + + pub fn instantiation_nonce() -> u64; + + pub fn is_contract(account_id_ptr: *const u8) -> ReturnCode; + + pub fn minimum_balance(output_ptr: *mut u8, output_len_ptr: *mut u32); + + pub fn now(output_ptr: *mut u8, output_len_ptr: *mut u32); + + pub fn own_code_hash(output_ptr: *mut u8, output_len_ptr: *mut u32); + + pub fn reentrance_count() -> u32; + + pub fn remove_delegate_dependency(code_hash_ptr: *const u8); + + pub fn seal_return(flags: u32, data_ptr: *const u8, data_len: u32) -> !; + + pub fn set_code_hash(code_hash_ptr: *const u8) -> ReturnCode; + + pub fn set_storage( + key_ptr: *const u8, + key_len: u32, + value_ptr: *const u8, + value_len: u32, + ) -> ReturnCode; + + pub fn sr25519_verify( + signature_ptr: *const u8, + public_key_ptr: *const u8, + message_len: u32, + message_ptr: *const u8, + ) -> ReturnCode; + + pub fn take_storage( + key_ptr: *const u8, + key_len: u32, + out_ptr: *mut u8, + out_len_ptr: *mut u32, + ) -> ReturnCode; + + pub fn terminate(beneficiary_ptr: *const u8) -> !; + + pub fn transfer( + account_id_ptr: *const u8, + account_id_len: u32, + transferred_value_ptr: *const u8, + transferred_value_len: u32, + ) -> ReturnCode; + + pub fn value_transferred(output_ptr: *mut u8, output_len_ptr: *mut u32); + + pub fn weight_to_fee(gas: u64, output_ptr: *mut u8, output_len_ptr: *mut u32); + + pub fn xcm_execute(msg_ptr: *const u8, msg_len: u32, output_ptr: *mut u8) -> ReturnCode; + + pub fn xcm_send( + dest_ptr: *const u8, + msg_ptr: *const u8, + msg_len: u32, + output_ptr: *mut u8, + ) -> ReturnCode; + } + + pub mod v1 { + use crate::ReturnCode; + + #[link(wasm_import_module = "seal1")] + extern "C" { + pub fn call( + flags: u32, + callee_ptr: *const u8, + gas: u64, + transferred_value_ptr: *const u8, + input_data_ptr: *const u8, + input_data_len: u32, + output_ptr: *mut u8, + output_len_ptr: *mut u32, + ) -> ReturnCode; + + pub fn clear_storage(key_ptr: *const u8, key_len: u32) -> ReturnCode; + + pub fn contains_storage(key_ptr: *const u8, key_len: u32) -> ReturnCode; + + pub fn gas_left(output_ptr: *mut u8, output_len_ptr: *mut u32); + + pub fn get_storage( + key_ptr: *const u8, + key_len: u32, + out_ptr: *mut u8, + out_len_ptr: *mut u32, + ) -> ReturnCode; + + pub fn instantiate( + code_hash_ptr: *const u8, + gas: u64, + value_ptr: *const u8, + input_ptr: *const u8, + input_len: u32, + address_ptr: *mut u8, + address_len_ptr: *mut u32, + output_ptr: *mut u8, + output_len_ptr: *mut u32, + salt_ptr: *const u8, + salt_len: u32, + ) -> ReturnCode; + + pub fn set_storage( + key_ptr: *const u8, + key_len: u32, + value_ptr: *const u8, + value_len: u32, + ) -> ReturnCode; + + pub fn terminate(beneficiary_ptr: *const u8) -> !; + + pub fn weight_to_fee( + ref_time_limit: u64, + proof_time_limit: u64, + output_ptr: *mut u8, + output_len_ptr: *mut u32, + ); + } + } + + pub mod v2 { + use crate::ReturnCode; + + #[link(wasm_import_module = "seal2")] + extern "C" { + pub fn call( + flags: u32, + callee_ptr: *const u8, + ref_time_limit: u64, + proof_time_limit: u64, + deposit_ptr: *const u8, + transferred_value_ptr: *const u8, + input_data_ptr: *const u8, + input_data_len: u32, + output_ptr: *mut u8, + output_len_ptr: *mut u32, + ) -> ReturnCode; + + pub fn instantiate( + code_hash_ptr: *const u8, + ref_time_limit: u64, + proof_time_limit: u64, + deposit_ptr: *const u8, + value_ptr: *const u8, + input_ptr: *const u8, + input_len: u32, + address_ptr: *mut u8, + address_len_ptr: *mut u32, + output_ptr: *mut u8, + output_len_ptr: *mut u32, + salt_ptr: *const u8, + salt_len: u32, + ) -> ReturnCode; + + pub fn set_storage( + key_ptr: *const u8, + key_len: u32, + value_ptr: *const u8, + value_len: u32, + ) -> ReturnCode; + } + } +} + +/// A macro to implement all Host functions with a signature of `fn(&mut &mut [u8])`. +macro_rules! impl_wrapper_for { + (@impl_fn $( $mod:ident )::*, $suffix:literal, $name:ident) => { + paste::paste! { + fn [<$name $suffix>](output: &mut &mut [u8]) { + let mut output_len = output.len() as u32; + unsafe { + $( $mod )::*::$name(output.as_mut_ptr(), &mut output_len); + } + } + } + }; + + () => {}; + + (($mod:ident, $suffix:literal) => [$( $name:ident),*], $($tail:tt)*) => { + $(impl_wrapper_for!(@impl_fn sys::$mod, $suffix, $name);)* + impl_wrapper_for!($($tail)*); + }; + + (() => [$( $name:ident),*], $($tail:tt)*) => { + $(impl_wrapper_for!(@impl_fn sys, "", $name);)* + impl_wrapper_for!($($tail)*); + }; +} + +/// A macro to implement all the hash functions Apis. +macro_rules! impl_hash_fn { + ( $name:ident, $bytes_result:literal ) => { + paste::item! { + fn [](input: &[u8], output: &mut [u8; $bytes_result]) { + unsafe { + sys::[]( + input.as_ptr(), + input.len() as u32, + output.as_mut_ptr(), + ) + } + } + } + }; +} + +/// A macro to implement the get_storage functions. +macro_rules! impl_get_storage { + ($fn_name:ident, $sys_get_storage:path) => { + fn $fn_name(key: &[u8], output: &mut &mut [u8]) -> Result { + let mut output_len = output.len() as u32; + let ret_code = { + unsafe { + $sys_get_storage( + key.as_ptr(), + key.len() as u32, + output.as_mut_ptr(), + &mut output_len, + ) + } + }; + extract_from_slice(output, output_len as usize); + ret_code.into() + } + }; +} + +impl HostFn for HostFnImpl { + fn instantiate_v1( + code_hash: &[u8], + gas: u64, + value: &[u8], + input: &[u8], + mut address: Option<&mut [u8]>, + mut output: Option<&mut [u8]>, + salt: &[u8], + ) -> Result { + let (address_ptr, mut address_len) = ptr_len_or_sentinel(&mut address); + let (output_ptr, mut output_len) = ptr_len_or_sentinel(&mut output); + let ret_code = unsafe { + sys::v1::instantiate( + code_hash.as_ptr(), + gas, + value.as_ptr(), + input.as_ptr(), + input.len() as u32, + address_ptr, + &mut address_len, + output_ptr, + &mut output_len, + salt.as_ptr(), + salt.len() as u32, + ) + }; + + if let Some(ref mut address) = address { + extract_from_slice(address, address_len as usize); + } + if let Some(ref mut output) = output { + extract_from_slice(output, output_len as usize); + } + ret_code.into() + } + + fn instantiate_v2( + code_hash: &[u8], + ref_time_limit: u64, + proof_size_limit: u64, + deposit: Option<&[u8]>, + value: &[u8], + input: &[u8], + mut address: Option<&mut [u8]>, + mut output: Option<&mut [u8]>, + salt: &[u8], + ) -> Result { + let (address_ptr, mut address_len) = ptr_len_or_sentinel(&mut address); + let (output_ptr, mut output_len) = ptr_len_or_sentinel(&mut output); + let deposit_ptr = ptr_or_sentinel(&deposit); + + let ret_code = { + unsafe { + sys::v2::instantiate( + code_hash.as_ptr(), + ref_time_limit, + proof_size_limit, + deposit_ptr, + value.as_ptr(), + input.as_ptr(), + input.len() as u32, + address_ptr, + &mut address_len, + output_ptr, + &mut output_len, + salt.as_ptr(), + salt.len() as u32, + ) + } + }; + + if let Some(ref mut address) = address { + extract_from_slice(address, address_len as usize); + } + + if let Some(ref mut output) = output { + extract_from_slice(output, output_len as usize); + } + + ret_code.into() + } + + fn call( + callee: &[u8], + gas: u64, + value: &[u8], + input_data: &[u8], + mut output: Option<&mut [u8]>, + ) -> Result { + let (output_ptr, mut output_len) = ptr_len_or_sentinel(&mut output); + let ret_code = { + unsafe { + sys::call( + callee.as_ptr(), + callee.len() as u32, + gas, + value.as_ptr(), + value.len() as u32, + input_data.as_ptr(), + input_data.len() as u32, + output_ptr, + &mut output_len, + ) + } + }; + + if let Some(ref mut output) = output { + extract_from_slice(output, output_len as usize); + } + + ret_code.into() + } + + fn call_v1( + flags: CallFlags, + callee: &[u8], + gas: u64, + value: &[u8], + input_data: &[u8], + mut output: Option<&mut [u8]>, + ) -> Result { + let (output_ptr, mut output_len) = ptr_len_or_sentinel(&mut output); + let ret_code = { + unsafe { + sys::v1::call( + flags.bits(), + callee.as_ptr(), + gas, + value.as_ptr(), + input_data.as_ptr(), + input_data.len() as u32, + output_ptr, + &mut output_len, + ) + } + }; + + if let Some(ref mut output) = output { + extract_from_slice(output, output_len as usize); + } + + ret_code.into() + } + + fn call_v2( + flags: CallFlags, + callee: &[u8], + ref_time_limit: u64, + proof_time_limit: u64, + deposit: Option<&[u8]>, + value: &[u8], + input_data: &[u8], + mut output: Option<&mut [u8]>, + ) -> Result { + let (output_ptr, mut output_len) = ptr_len_or_sentinel(&mut output); + let deposit_ptr = ptr_or_sentinel(&deposit); + let ret_code = { + unsafe { + sys::v2::call( + flags.bits(), + callee.as_ptr(), + ref_time_limit, + proof_time_limit, + deposit_ptr, + value.as_ptr(), + input_data.as_ptr(), + input_data.len() as u32, + output_ptr, + &mut output_len, + ) + } + }; + + if let Some(ref mut output) = output { + extract_from_slice(output, output_len as usize); + } + + ret_code.into() + } + + fn caller_is_root() -> u32 { + unsafe { sys::caller_is_root() }.into_u32() + } + + fn delegate_call( + flags: CallFlags, + code_hash: &[u8], + input: &[u8], + mut output: Option<&mut [u8]>, + ) -> Result { + let (output_ptr, mut output_len) = ptr_len_or_sentinel(&mut output); + let ret_code = { + unsafe { + sys::delegate_call( + flags.bits(), + code_hash.as_ptr(), + input.as_ptr(), + input.len() as u32, + output_ptr, + &mut output_len, + ) + } + }; + + if let Some(ref mut output) = output { + extract_from_slice(output, output_len as usize); + } + + ret_code.into() + } + + fn transfer(account_id: &[u8], value: &[u8]) -> Result { + let ret_code = unsafe { + sys::transfer( + account_id.as_ptr(), + account_id.len() as u32, + value.as_ptr(), + value.len() as u32, + ) + }; + ret_code.into() + } + + fn deposit_event(topics: &[u8], data: &[u8]) { + unsafe { + sys::deposit_event( + topics.as_ptr(), + topics.len() as u32, + data.as_ptr(), + data.len() as u32, + ) + } + } + + fn set_storage(key: &[u8], value: &[u8]) { + unsafe { + sys::set_storage(key.as_ptr(), key.len() as u32, value.as_ptr(), value.len() as u32) + }; + } + + fn set_storage_v1(key: &[u8], encoded_value: &[u8]) -> Option { + let ret_code = unsafe { + sys::v1::set_storage( + key.as_ptr(), + key.len() as u32, + encoded_value.as_ptr(), + encoded_value.len() as u32, + ) + }; + ret_code.into() + } + + fn set_storage_v2(key: &[u8], encoded_value: &[u8]) -> Option { + let ret_code = unsafe { + sys::v2::set_storage( + key.as_ptr(), + key.len() as u32, + encoded_value.as_ptr(), + encoded_value.len() as u32, + ) + }; + ret_code.into() + } + + fn clear_storage(key: &[u8]) { + unsafe { sys::clear_storage(key.as_ptr(), key.len() as u32) }; + } + + fn clear_storage_v1(key: &[u8]) -> Option { + let ret_code = unsafe { sys::v1::clear_storage(key.as_ptr(), key.len() as u32) }; + ret_code.into() + } + + impl_get_storage!(get_storage, sys::get_storage); + impl_get_storage!(get_storage_v1, sys::v1::get_storage); + + fn take_storage(key: &[u8], output: &mut &mut [u8]) -> Result { + let mut output_len = output.len() as u32; + let ret_code = { + unsafe { + sys::take_storage( + key.as_ptr(), + key.len() as u32, + output.as_mut_ptr(), + &mut output_len, + ) + } + }; + extract_from_slice(output, output_len as usize); + ret_code.into() + } + + fn contains_storage(key: &[u8]) -> Option { + let ret_code = unsafe { sys::contains_storage(key.as_ptr(), key.len() as u32) }; + ret_code.into() + } + + fn contains_storage_v1(key: &[u8]) -> Option { + let ret_code = unsafe { sys::v1::contains_storage(key.as_ptr(), key.len() as u32) }; + ret_code.into() + } + + fn terminate(beneficiary: &[u8]) -> ! { + unsafe { sys::terminate(beneficiary.as_ptr()) } + } + + fn terminate_v1(beneficiary: &[u8]) -> ! { + unsafe { sys::v1::terminate(beneficiary.as_ptr()) } + } + + fn call_chain_extension(func_id: u32, input: &[u8], output: &mut &mut [u8]) -> u32 { + let mut output_len = output.len() as u32; + let ret_code = { + unsafe { + sys::call_chain_extension( + func_id, + input.as_ptr(), + input.len() as u32, + output.as_mut_ptr(), + &mut output_len, + ) + } + }; + extract_from_slice(output, output_len as usize); + ret_code.into_u32() + } + + fn input(output: &mut &mut [u8]) { + let mut output_len = output.len() as u32; + { + unsafe { sys::input(output.as_mut_ptr(), &mut output_len) }; + } + extract_from_slice(output, output_len as usize); + } + + fn return_value(flags: ReturnFlags, return_value: &[u8]) -> ! { + unsafe { sys::seal_return(flags.bits(), return_value.as_ptr(), return_value.len() as u32) } + } + + fn call_runtime(call: &[u8]) -> Result { + let ret_code = unsafe { sys::call_runtime(call.as_ptr(), call.len() as u32) }; + ret_code.into() + } + + impl_wrapper_for! { + () => [caller, block_number, address, balance, gas_left, value_transferred, now, minimum_balance], + (v1, "_v1") => [gas_left], + } + + fn weight_to_fee(gas: u64, output: &mut &mut [u8]) { + let mut output_len = output.len() as u32; + { + unsafe { sys::weight_to_fee(gas, output.as_mut_ptr(), &mut output_len) }; + } + extract_from_slice(output, output_len as usize); + } + + fn weight_to_fee_v1(ref_time_limit: u64, proof_size_limit: u64, output: &mut &mut [u8]) { + let mut output_len = output.len() as u32; + { + unsafe { + sys::v1::weight_to_fee( + ref_time_limit, + proof_size_limit, + output.as_mut_ptr(), + &mut output_len, + ) + }; + } + extract_from_slice(output, output_len as usize); + } + + impl_hash_fn!(sha2_256, 32); + impl_hash_fn!(keccak_256, 32); + impl_hash_fn!(blake2_256, 32); + impl_hash_fn!(blake2_128, 16); + + fn ecdsa_recover( + signature: &[u8; 65], + message_hash: &[u8; 32], + output: &mut [u8; 33], + ) -> Result { + let ret_code = unsafe { + sys::ecdsa_recover(signature.as_ptr(), message_hash.as_ptr(), output.as_mut_ptr()) + }; + ret_code.into() + } + + fn ecdsa_to_eth_address(pubkey: &[u8; 33], output: &mut [u8; 20]) -> Result { + let ret_code = unsafe { sys::ecdsa_to_eth_address(pubkey.as_ptr(), output.as_mut_ptr()) }; + ret_code.into() + } + + fn sr25519_verify(signature: &[u8; 64], message: &[u8], pub_key: &[u8; 32]) -> Result { + let ret_code = unsafe { + sys::sr25519_verify( + signature.as_ptr(), + pub_key.as_ptr(), + message.len() as u32, + message.as_ptr(), + ) + }; + ret_code.into() + } + + fn is_contract(account_id: &[u8]) -> bool { + let ret_val = unsafe { sys::is_contract(account_id.as_ptr()) }; + ret_val.into_bool() + } + + fn caller_is_origin() -> bool { + let ret_val = unsafe { sys::caller_is_origin() }; + ret_val.into_bool() + } + + fn set_code_hash(code_hash: &[u8]) -> Result { + let ret_val = unsafe { sys::set_code_hash(code_hash.as_ptr()) }; + ret_val.into() + } + + fn code_hash(account_id: &[u8], output: &mut [u8]) -> Result { + let mut output_len = output.len() as u32; + let ret_val = + unsafe { sys::code_hash(account_id.as_ptr(), output.as_mut_ptr(), &mut output_len) }; + ret_val.into() + } + + fn own_code_hash(output: &mut [u8]) { + let mut output_len = output.len() as u32; + unsafe { sys::own_code_hash(output.as_mut_ptr(), &mut output_len) } + } + + fn account_reentrance_count(account: &[u8]) -> u32 { + unsafe { sys::account_reentrance_count(account.as_ptr()) } + } + + fn add_delegate_dependency(code_hash: &[u8]) { + unsafe { sys::add_delegate_dependency(code_hash.as_ptr()) } + } + + fn remove_delegate_dependency(code_hash: &[u8]) { + unsafe { sys::remove_delegate_dependency(code_hash.as_ptr()) } + } + + fn instantiation_nonce() -> u64 { + unsafe { sys::instantiation_nonce() } + } + + fn reentrance_count() -> u32 { + unsafe { sys::reentrance_count() } + } + + fn xcm_execute(msg: &[u8], output: &mut &mut [u8]) -> Result { + let ret_code = + unsafe { sys::xcm_execute(msg.as_ptr(), msg.len() as _, output.as_mut_ptr()) }; + ret_code.into() + } + + fn xcm_send(dest: &[u8], msg: &[u8], output: &mut &mut [u8]) -> Result { + let ret_code = unsafe { + sys::xcm_send(dest.as_ptr(), msg.as_ptr(), msg.len() as _, output.as_mut_ptr()) + }; + ret_code.into() + } +} diff --git a/substrate/frame/contracts/uapi/src/lib.rs b/substrate/frame/contracts/uapi/src/lib.rs new file mode 100644 index 000000000000..3d384bbb85dd --- /dev/null +++ b/substrate/frame/contracts/uapi/src/lib.rs @@ -0,0 +1,139 @@ +// Copyright (C) Parity Technologies (UK) Ltd. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +//! External C API to communicate with substrate contracts runtime module. +//! +//! Refer to substrate FRAME contract module for more documentation. + +#![no_std] + +mod flags; +pub use flags::*; + +#[cfg(any(target_arch = "wasm32", target_arch = "riscv32"))] +mod host; + +#[cfg(any(target_arch = "wasm32", target_arch = "riscv32"))] +pub use host::*; + +macro_rules! define_error_codes { + ( + $( + $( #[$attr:meta] )* + $name:ident = $discr:literal, + )* + ) => { + /// Every error that can be returned to a contract when it calls any of the host functions. + #[derive(Debug)] + #[repr(u32)] + pub enum ReturnErrorCode { + /// API call successful. + Success = 0, + $( + $( #[$attr] )* + $name = $discr, + )* + /// Returns if an unknown error was received from the host module. + Unknown, + } + + impl From for Result { + #[inline] + fn from(return_code: ReturnCode) -> Self { + match return_code.0 { + 0 => Ok(()), + $( + $discr => Err(ReturnErrorCode::$name), + )* + _ => Err(ReturnErrorCode::Unknown), + } + } + } + }; +} + +impl From for u32 { + fn from(code: ReturnErrorCode) -> u32 { + code as u32 + } +} + +define_error_codes! { + /// The called function trapped and has its state changes reverted. + /// In this case no output buffer is returned. + /// Can only be returned from `call` and `instantiate`. + CalleeTrapped = 1, + /// The called function ran to completion but decided to revert its state. + /// An output buffer is returned when one was supplied. + /// Can only be returned from `call` and `instantiate`. + CalleeReverted = 2, + /// The passed key does not exist in storage. + KeyNotFound = 3, + /// Deprecated and no longer returned: There is only the minimum balance. + _BelowSubsistenceThreshold = 4, + /// Transfer failed for other not further specified reason. Most probably + /// reserved or locked balance of the sender that was preventing the transfer. + TransferFailed = 5, + /// Deprecated and no longer returned: Endowment is no longer required. + _EndowmentTooLow = 6, + /// No code could be found at the supplied code hash. + CodeNotFound = 7, + /// The account that was called is no contract. + NotCallable = 8, + /// The call to `debug_message` had no effect because debug message + /// recording was disabled. + LoggingDisabled = 9, + /// The call dispatched by `call_runtime` was executed but returned an error. + CallRuntimeFailed = 10, + /// ECDSA public key recovery failed. Most probably wrong recovery id or signature. + EcdsaRecoveryFailed = 11, + /// sr25519 signature verification failed. + Sr25519VerifyFailed = 12, + /// The `xcm_execute` call failed. + XcmExecutionFailed = 13, + /// The `xcm_send` call failed. + XcmSendFailed = 14, +} + +/// The raw return code returned by the host side. +#[repr(transparent)] +pub struct ReturnCode(u32); + +/// Used as a sentinel value when reading and writing contract memory. +/// +/// We use this value to signal `None` to a contract when only a primitive is +/// allowed and we don't want to go through encoding a full Rust type. +/// Using `u32::Max` is a safe sentinel because contracts are never +/// allowed to use such a large amount of resources. So this value doesn't +/// make sense for a memory location or length. +const SENTINEL: u32 = u32::MAX; + +impl From for Option { + fn from(code: ReturnCode) -> Self { + (code.0 < SENTINEL).then_some(code.0) + } +} + +impl ReturnCode { + /// Returns the raw underlying `u32` representation. + pub fn into_u32(self) -> u32 { + self.0 + } + /// Returns the underlying `u32` converted into `bool`. + pub fn into_bool(self) -> bool { + self.0.ne(&0) + } +} + +type Result = core::result::Result<(), ReturnErrorCode>;