feat: add config for grpc server methods (#5886)

Description
---
Added configuration options for the base node's gRPC methods whereby
each method can be enabled or disabled with the startup-config settings.

Closing #5858

Some BloomRPC screenshots:


![image](https://github.com/tari-project/tari/assets/39146854/356cbe44-d3ff-46c8-9215-57e9f24da815)


![image](https://github.com/tari-project/tari/assets/39146854/8bf225b8-1b00-439b-96be-93c8040bf8d4)


Motivation and Context
---
See #5858

How Has This Been Tested?
---
- Pass existing unit tests
- Added unit test `fn it_deserializes_enums`
- Pass cucumber tests on CI
- Manual gRPC queries to the base node (with BloomRPC)

What process can a PR reviewer use to test or verify this change?
---
- Code walkthrough
- Manual gRPC queries to the base node

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Breaking Changes
---

- [x] None
- [ ] Requires data directory on base node to be deleted
- [ ] Requires hard fork
- [ ] Other - Please specify

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applications/minotari_node/Cargo.toml

@@ -65,3 +65,6 @@ ignored = [
     # We need to specify extra features for log4rs even though it is not used directly in this crate
     "log4rs"
 ]
+
+[dev-dependencies]
+toml = { version = "0.5" }

applications/minotari_node/src/config.rs

@@ -87,6 +87,8 @@ pub struct BaseNodeConfig {
     pub grpc_enabled: bool,
     /// GRPC address of base node
     pub grpc_address: Option<Multiaddr>,
+    /// GRPC server config - which methods are active and which not
+    pub grpc_server_deny_methods: Vec<GrpcMethod>,
     /// A path to the file that stores the base node identity and secret key
     pub identity_file: PathBuf,
     /// Spin up and use a built-in Tor instance. This only works on macos/linux - requires that the wallet was built
@@ -143,6 +145,16 @@ impl Default for BaseNodeConfig {
             network: Network::default(),
             grpc_enabled: true,
             grpc_address: None,
+            grpc_server_deny_methods: vec![
+                // These gRPC server methods share sensitive information, thus disabled by default
+                GrpcMethod::GetVersion,
+                GrpcMethod::CheckForUpdates,
+                GrpcMethod::GetSyncInfo,
+                GrpcMethod::GetSyncProgress,
+                GrpcMethod::GetTipInfo,
+                GrpcMethod::Identify,
+                GrpcMethod::GetNetworkStatus,
+            ],
             identity_file: PathBuf::from("config/base_node_id.json"),
             use_libtor: false,
             tor_identity_file: PathBuf::from("config/base_node_tor_id.json"),
@@ -195,3 +207,83 @@ impl BaseNodeConfig {
 pub enum DatabaseType {
     Lmdb,
 }
+
+/// A list of all the GRPC methods that can be enabled/disabled
+#[derive(Debug, Clone, Serialize, Deserialize, Eq, PartialEq)]
+#[serde(rename_all = "snake_case")]
+pub enum GrpcMethod {
+    ListHeaders,
+    GetHeaderByHash,
+    GetBlocks,
+    GetBlockTiming,
+    GetConstants,
+    GetBlockSize,
+    GetBlockFees,
+    GetVersion,
+    CheckForUpdates,
+    GetTokensInCirculation,
+    GetNetworkDifficulty,
+    GetNewBlockTemplate,
+    GetNewBlock,
+    GetNewBlockBlob,
+    SubmitBlock,
+    SubmitBlockBlob,
+    SubmitTransaction,
+    GetSyncInfo,
+    GetSyncProgress,
+    GetTipInfo,
+    SearchKernels,
+    SearchUtxos,
+    FetchMatchingUtxos,
+    GetPeers,
+    GetMempoolTransactions,
+    TransactionState,
+    Identify,
+    GetNetworkStatus,
+    ListConnectedPeers,
+    GetMempoolStats,
+    GetActiveValidatorNodes,
+    GetShardKey,
+    GetTemplateRegistrations,
+    GetSideChainUtxos,
+}
+
+#[cfg(test)]
+mod tests {
+    use serde::{Deserialize, Serialize};
+
+    use crate::config::GrpcMethod;
+
+    #[derive(Clone, Serialize, Deserialize, Debug)]
+    #[allow(clippy::struct_excessive_bools)]
+    struct TestConfig {
+        name: String,
+        inner_config: TestInnerConfig,
+    }
+
+    #[derive(Clone, Serialize, Deserialize, Debug)]
+    #[allow(clippy::struct_excessive_bools)]
+    struct TestInnerConfig {
+        deny_methods: Vec<GrpcMethod>,
+    }
+
+    #[test]
+    fn it_deserializes_enums() {
+        let config_str = r#"name = "blockchain champion"
+                inner_config.deny_methods = [
+                    "list_headers",
+                    "get_constants",
+            #        "get_blocks"
+                    "identify",
+            #        "get_shard_key"
+                ]"#;
+        let config = toml::from_str::<TestConfig>(config_str).unwrap();
+
+        // Enums in the config
+        assert!(config.inner_config.deny_methods.contains(&GrpcMethod::ListHeaders));
+        assert!(config.inner_config.deny_methods.contains(&GrpcMethod::GetConstants));
+        assert!(!config.inner_config.deny_methods.contains(&GrpcMethod::GetBlocks)); // commented out in the config
+        assert!(config.inner_config.deny_methods.contains(&GrpcMethod::Identify));
+        assert!(!config.inner_config.deny_methods.contains(&GrpcMethod::GetShardKey)); // commented out in the config
+    }
+}