diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5a67acb98d7..beeafd21f8a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -54,7 +54,7 @@ jobs:
       - uses: actions/checkout@v4
 
       # Install all the required tools
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: just,cargo-nextest,cargo-llvm-cov
 
@@ -107,7 +107,7 @@ jobs:
         with:
           python-version: 3.11
           cache: pip
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: cargo-llvm-cov
       - run: pip3 install --user -r pytest/requirements.txt
@@ -133,7 +133,7 @@ jobs:
         with:
           python-version: 3.11
           cache: pip
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: cargo-llvm-cov
       - run: pip3 install --user -r pytest/requirements.txt
@@ -163,7 +163,7 @@ jobs:
         with:
           python-version: 3.11
           cache: pip
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: cargo-llvm-cov
       - run: pip3 install --user -r pytest/requirements.txt
@@ -195,7 +195,7 @@ jobs:
         with:
           python-version: 3.11
           cache: pip
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: cargo-llvm-cov
       - run: pip3 install --user -r pytest/requirements.txt
@@ -217,7 +217,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: just
       - uses: actions/setup-python@v4
@@ -236,7 +236,7 @@ jobs:
         with:
           python-version: 3.11
           cache: pip
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: cargo-llvm-cov
       - run: pip3 install --user -r pytest/requirements.txt
@@ -258,7 +258,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: just
       - run: just check-rpc-errors-schema
@@ -277,7 +277,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: just
       - run: just check-cargo-fmt
@@ -287,7 +287,7 @@ jobs:
     runs-on: ubuntu-22.04-8core
     steps:
       - uses: actions/checkout@v4
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: just
       - run: just check-cargo-clippy
@@ -297,7 +297,7 @@ jobs:
     runs-on: ubuntu-22.04-8core
     steps:
       - uses: actions/checkout@v4
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: just
       - run: just doctests
@@ -307,7 +307,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: just,cargo-deny
       - run: just check-cargo-deny
@@ -317,7 +317,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: just
       - run: just check-themis
@@ -327,7 +327,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: just
       - run: just check-non-default
@@ -337,7 +337,7 @@ jobs:
     runs-on: ubuntu-22.04-8core
     steps:
       - uses: actions/checkout@v4
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: just,cargo-udeps
       - run: just check-cargo-udeps
@@ -347,7 +347,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: cargo-audit
       - run: cargo audit -D warnings
@@ -373,7 +373,7 @@ jobs:
         with:
           name: coverage-profraw
           path: coverage/profraw
-      - uses: taiki-e/install-action@91af8c38814c3998cb755869e5cbeffd3ab0e462
+      - uses: taiki-e/install-action@9b5b983efc779f85e5e5d11539f005e85ccb27ff
         with:
           tool: cargo-llvm-cov
       - uses: actions/setup-python@v4
diff --git a/Cargo.toml b/Cargo.toml
index 73ed4457d5d..01f706b667b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 version = "0.0.0"                               # managed by cargo-workspaces, see below
 authors = ["Near Inc <hello@nearprotocol.com>"]
 edition = "2021"
-rust-version = "1.76.0"
+rust-version = "1.77.0"
 repository = "https://github.com/near/nearcore"
 license = "MIT OR Apache-2.0"
 
diff --git a/chain/chain/src/store.rs b/chain/chain/src/store.rs
index f4ccab48a7f..a19600f35b5 100644
--- a/chain/chain/src/store.rs
+++ b/chain/chain/src/store.rs
@@ -2772,8 +2772,7 @@ mod tests {
         let mut chain = get_chain(Clock::real());
         let genesis = chain.get_block_by_height(0).unwrap();
         let signer = Arc::new(create_test_signer("test1"));
-        let short_fork =
-            vec![TestBlockBuilder::new(Clock::real(), &genesis, signer.clone()).build()];
+        let short_fork = [TestBlockBuilder::new(Clock::real(), &genesis, signer.clone()).build()];
         let mut store_update = chain.mut_chain_store().store_update();
         store_update.save_block_header(short_fork[0].header().clone()).unwrap();
         store_update.commit().unwrap();
diff --git a/chain/chain/src/tests/garbage_collection.rs b/chain/chain/src/tests/garbage_collection.rs
index de2ab720d21..1894731227c 100644
--- a/chain/chain/src/tests/garbage_collection.rs
+++ b/chain/chain/src/tests/garbage_collection.rs
@@ -601,7 +601,7 @@ fn test_fork_far_away_from_epoch_end() {
     let max_changes = 1;
     let fork_clean_step = 100;
     let epoch_length = fork_clean_step + 10;
-    let simple_chains = vec![
+    let simple_chains = [
         SimpleChain { from: 0, length: 5, is_removed: false },
         SimpleChain { from: 5, length: 2, is_removed: true },
         // We want the chain to end up exactly at the new epoch start.
diff --git a/chain/client/src/adapter.rs b/chain/client/src/adapter.rs
index fdc59b7c63f..16987651e08 100644
--- a/chain/client/src/adapter.rs
+++ b/chain/client/src/adapter.rs
@@ -3,30 +3,6 @@ use crate::view_client::ViewClientActor;
 use near_async::actix::AddrWithAutoSpanContextExt;
 use near_async::messaging::IntoSender;
 use near_network::client::ClientSenderForNetwork;
-use near_network::types::{
-    PartialEncodedChunkForwardMsg, PartialEncodedChunkRequestMsg, PartialEncodedChunkResponseMsg,
-};
-use near_primitives::hash::CryptoHash;
-use near_primitives::sharding::PartialEncodedChunk;
-
-#[derive(actix::Message, Debug)]
-#[rtype(result = "()")]
-pub(crate) struct RecvPartialEncodedChunkForward(pub PartialEncodedChunkForwardMsg);
-
-#[derive(actix::Message, Debug)]
-#[rtype(result = "()")]
-pub(crate) struct RecvPartialEncodedChunk(pub PartialEncodedChunk);
-
-#[derive(actix::Message, Debug)]
-#[rtype(result = "()")]
-pub(crate) struct RecvPartialEncodedChunkResponse(
-    pub PartialEncodedChunkResponseMsg,
-    pub std::time::Instant,
-);
-
-#[derive(actix::Message, Debug)]
-#[rtype(result = "()")]
-pub(crate) struct RecvPartialEncodedChunkRequest(pub PartialEncodedChunkRequestMsg, pub CryptoHash);
 
 pub fn client_sender_for_network(
     client_addr: actix::Addr<ClientActor>,
diff --git a/chain/client/src/sync/external.rs b/chain/client/src/sync/external.rs
index c03727e230e..af8c08ec510 100644
--- a/chain/client/src/sync/external.rs
+++ b/chain/client/src/sync/external.rs
@@ -151,7 +151,11 @@ impl ExternalConnection {
                 if let Some(parent_dir) = path.parent() {
                     std::fs::create_dir_all(parent_dir)?;
                 }
-                let mut file = std::fs::OpenOptions::new().write(true).create(true).open(&path)?;
+                let mut file = std::fs::OpenOptions::new()
+                    .write(true)
+                    .create(true)
+                    .truncate(true)
+                    .open(&path)?;
                 file.write_all(data)?;
                 tracing::debug!(target: "state_sync_dump", shard_id, part_length = data.len(), ?location, ?file_type, "Wrote a state part to a file");
                 Ok(())
diff --git a/chain/epoch-manager/src/tests/mod.rs b/chain/epoch-manager/src/tests/mod.rs
index 7beffe89ab6..c090c6af9d7 100644
--- a/chain/epoch-manager/src/tests/mod.rs
+++ b/chain/epoch-manager/src/tests/mod.rs
@@ -2296,7 +2296,7 @@ fn test_protocol_version_switch_with_shard_layout_change() {
         }
         epoch_manager.record_block_info(block_info, [0; 32]).unwrap();
     }
-    let epochs = vec![EpochId::default(), EpochId(h[2]), EpochId(h[4])];
+    let epochs = [EpochId::default(), EpochId(h[2]), EpochId(h[4])];
     assert_eq!(
         epoch_manager.get_epoch_info(&epochs[1]).unwrap().protocol_version(),
         new_protocol_version - 1
diff --git a/chain/network/src/network_protocol/tests.rs b/chain/network/src/network_protocol/tests.rs
index 81e54691787..2d339b1b2cc 100644
--- a/chain/network/src/network_protocol/tests.rs
+++ b/chain/network/src/network_protocol/tests.rs
@@ -24,7 +24,7 @@ fn deduplicate_edges() {
     let bc1 = data::make_edge(&b, &c, 1);
     let mut want = vec![ab5.clone(), ac9.clone(), bc1.clone()];
     want.sort_by_key(|e| e.key().clone());
-    let input = vec![ab1, ab3, ab5, ac7, ac9, bc1];
+    let input = [ab1, ab3, ab5, ac7, ac9, bc1];
     for p in input.iter().permutations(input.len()) {
         let mut got = Edge::deduplicate(p.into_iter().cloned().collect());
         got.sort_by_key(|e| e.key().clone());
diff --git a/chain/network/src/peer/peer_actor.rs b/chain/network/src/peer/peer_actor.rs
index dcc99931635..a96b785aeda 100644
--- a/chain/network/src/peer/peer_actor.rs
+++ b/chain/network/src/peer/peer_actor.rs
@@ -1795,6 +1795,7 @@ impl actix::Handler<WithSpanContext<Stop>> for PeerActor {
 type InboundHandshakePermit = tokio::sync::OwnedSemaphorePermit;
 
 #[derive(Debug)]
+#[allow(dead_code)]
 enum ConnectingStatus {
     Inbound(InboundHandshakePermit),
     Outbound { _permit: connection::OutboundHandshakePermit, handshake_spec: HandshakeSpec },
@@ -1813,6 +1814,7 @@ enum ConnectingStatus {
 /// For the exact process of establishing a connection between peers,
 /// see PoolSnapshot in chain/network/src/peer_manager/connection.rs.
 #[derive(Debug)]
+#[allow(dead_code)]
 enum PeerStatus {
     /// Handshake in progress.
     Connecting(HandshakeSignalSender, ConnectingStatus),
diff --git a/core/crypto/src/key_file.rs b/core/crypto/src/key_file.rs
index c3c7795ed14..e56f80f3d81 100644
--- a/core/crypto/src/key_file.rs
+++ b/core/crypto/src/key_file.rs
@@ -26,7 +26,7 @@ impl KeyFile {
     #[cfg(unix)]
     fn create(path: &Path) -> io::Result<File> {
         use std::os::unix::fs::OpenOptionsExt;
-        std::fs::File::options().mode(0o600).write(true).create(true).open(path)
+        std::fs::File::options().mode(0o600).write(true).create(true).truncate(true).open(path)
     }
 
     #[cfg(not(unix))]
diff --git a/core/store/src/db/refcount.rs b/core/store/src/db/refcount.rs
index 80278847ae4..c7844220003 100644
--- a/core/store/src/db/refcount.rs
+++ b/core/store/src/db/refcount.rs
@@ -35,16 +35,19 @@ use crate::DBCol;
 /// In builds with debug assertions enabled, panics if `bytes` are non-empty but
 /// too short to fit 64-bit reference count.
 pub fn decode_value_with_rc(bytes: &[u8]) -> (Option<&[u8]>, i64) {
-    if bytes.len() < 8 {
-        debug_assert!(bytes.is_empty());
-        return (None, 0);
-    }
-    let (head, tail) = stdx::rsplit_slice::<8>(bytes);
-    let rc = i64::from_le_bytes(*tail);
-    if rc <= 0 {
-        (None, rc)
-    } else {
-        (Some(head), rc)
+    match bytes.split_last_chunk::<8>() {
+        None => {
+            debug_assert!(bytes.is_empty());
+            return (None, 0);
+        }
+        Some((head, tail)) => {
+            let rc = i64::from_le_bytes(*tail);
+            if rc <= 0 {
+                (None, rc)
+            } else {
+                (Some(head), rc)
+            }
+        }
     }
 }
 
diff --git a/core/store/src/trie/mod.rs b/core/store/src/trie/mod.rs
index 41bcebb4c6e..f8be9140c09 100644
--- a/core/store/src/trie/mod.rs
+++ b/core/store/src/trie/mod.rs
@@ -563,7 +563,7 @@ pub struct ApplyStatePartResult {
 }
 
 enum NodeOrValue {
-    Node(Box<RawTrieNodeWithSize>),
+    Node,
     Value(std::sync::Arc<[u8]>),
 }
 
@@ -812,7 +812,7 @@ impl Trie {
         to: &Option<&AccountId>,
     ) {
         match self.debug_retrieve_raw_node_or_value(hash) {
-            Ok(NodeOrValue::Node(_)) => {
+            Ok(NodeOrValue::Node) => {
                 let mut prefix: Vec<u8> = Vec::new();
                 let mut limit = limit.unwrap_or(u32::MAX);
                 self.print_recursive_internal(
@@ -1115,7 +1115,7 @@ impl Trie {
     ) -> Result<NodeOrValue, StorageError> {
         let bytes = self.internal_retrieve_trie_node(hash, true)?;
         match RawTrieNodeWithSize::try_from_slice(&bytes) {
-            Ok(node) => Ok(NodeOrValue::Node(Box::new(node))),
+            Ok(_) => Ok(NodeOrValue::Node),
             Err(_) => Ok(NodeOrValue::Value(bytes)),
         }
     }
diff --git a/runtime/near-vm-runner/src/instrument/stack_height/mod.rs b/runtime/near-vm-runner/src/instrument/stack_height/mod.rs
index a0da4859330..d6856d98f98 100644
--- a/runtime/near-vm-runner/src/instrument/stack_height/mod.rs
+++ b/runtime/near-vm-runner/src/instrument/stack_height/mod.rs
@@ -90,6 +90,7 @@ mod thunk;
 ///
 /// This means that the module is invalid.
 #[derive(Debug)]
+#[allow(dead_code)]
 pub struct Error(String);
 
 pub(crate) struct Context {
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 5e2dfe6908b..f84ea34e80d 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -2,6 +2,6 @@
 # This specifies the version of Rust we use to build.
 # Individual crates in the workspace may support a lower version, as indicated by `rust-version` field in each crate's `Cargo.toml`.
 # The version specified below, should be at least as high as the maximum `rust-version` within the workspace.
-channel = "1.76.0"
+channel = "1.77.0"
 components = [ "rustfmt", "clippy" ]
 targets = [ "wasm32-unknown-unknown" ]
diff --git a/utils/stdx/src/lib.rs b/utils/stdx/src/lib.rs
index a31eb9a7581..ecf027e1f13 100644
--- a/utils/stdx/src/lib.rs
+++ b/utils/stdx/src/lib.rs
@@ -27,45 +27,10 @@ pub fn split_array_mut<const N: usize, const L: usize, const R: usize>(
     (left.try_into().unwrap(), right.try_into().unwrap())
 }
 
-/// Splits `&[u8]` into `(&[u8; N], &[u8])`.  **Panics** if slice is shorter
-/// than `N`.
-pub fn split_slice<const N: usize>(slice: &[u8]) -> (&[u8; N], &[u8]) {
-    let (head, tail) = slice.split_at(N);
-    (head.try_into().unwrap(), tail)
-}
-
-/// Splits `&[u8]` into `(&[u8], &[u8; N])`.  **Panics** if slice is shorter
-/// than `N`.
-pub fn rsplit_slice<const N: usize>(slice: &[u8]) -> (&[u8], &[u8; N]) {
-    let index = slice.len().checked_sub(N).expect("len to be ≥ N");
-    let (head, tail) = slice.split_at(index);
-    (head, tail.try_into().unwrap())
-}
-
-/// Splits `&[u8]` into `(&[u8; N], &[u8])`.  **Panics** if slice is shorter
-/// than `N`.
-pub fn split_slice_mut<const N: usize>(slice: &mut [u8]) -> (&mut [u8; N], &mut [u8]) {
-    let (head, tail) = slice.split_at_mut(N);
-    (head.try_into().unwrap(), tail)
-}
-
-/// Splits `&[u8]` into `(&[u8], &[u8; N])`.  **Panics** if slice is shorter
-/// than `N`.
-pub fn rsplit_slice_mut<const N: usize>(slice: &mut [u8]) -> (&mut [u8], &mut [u8; N]) {
-    let index = slice.len().checked_sub(N).expect("len to be ≥ N");
-    let (head, tail) = slice.split_at_mut(index);
-    (head, tail.try_into().unwrap())
-}
-
 #[test]
 fn test_split() {
     assert_eq!((&[0, 1], &[2, 3, 4]), split_array(&[0, 1, 2, 3, 4]));
     assert_eq!((&mut [0, 1], &mut [2, 3, 4]), split_array_mut(&mut [0, 1, 2, 3, 4]));
-
-    assert_eq!((&[0, 1], &[2, 3, 4][..]), split_slice(&[0, 1, 2, 3, 4]));
-    assert_eq!((&[0, 1][..], &[2, 3, 4]), rsplit_slice(&[0, 1, 2, 3, 4]));
-    assert_eq!((&mut [0, 1], &mut [2, 3, 4][..]), split_slice_mut(&mut [0, 1, 2, 3, 4]));
-    assert_eq!((&mut [0, 1][..], &mut [2, 3, 4]), rsplit_slice_mut(&mut [0, 1, 2, 3, 4]));
 }
 
 /// Joins `[u8; L]` and `[u8; R]` into `[u8; L + R]`.