lightningdevkit · tnull · May 7, 2026 · May 7, 2026 · May 7, 2026 · May 7, 2026
diff --git a/.github/workflows/audit.yml b/.github/workflows/audit.yml
@@ -15,9 +15,3 @@ jobs:
       - uses: rustsec/audit-check@v1.4.1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
-          ignore: "RUSTSEC-2021-0145"
-              # RUSTSEC-2021-0145 pertains `atty`, which is a depencency of
-              # `criterion`. While the latter removed the depencency in its
-              # newest version, it would also require a higher `rustc`. We
-              # therefore avoid bumping it to allow benchmarking with our
-              # `rustc` 1.63 MSRV.
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
@@ -215,7 +215,7 @@ jobs:
   fuzz_sanity:
     runs-on: self-hosted
     env:
-      TOOLCHAIN: 1.75
+      TOOLCHAIN: 1.85.0
     steps:
       - name: Checkout source code
         uses: actions/checkout@v4
@@ -232,7 +232,7 @@ jobs:
   fuzz:
     runs-on: self-hosted
     env:
-      TOOLCHAIN: 1.75
+      TOOLCHAIN: 1.85.0
     steps:
       - name: Checkout source code
         uses: actions/checkout@v4
@@ -317,7 +317,7 @@ jobs:
   rustfmt:
     runs-on: ubuntu-latest
     env:
-      TOOLCHAIN: 1.75.0
+      TOOLCHAIN: 1.85.0
     steps:
       - name: Checkout source code
         uses: actions/checkout@v4
@@ -336,7 +336,7 @@ jobs:
   tor-connect:
     runs-on: ubuntu-latest
     env:
-      TOOLCHAIN: 1.75.0
+      TOOLCHAIN: 1.85.0
     steps:
       - name: Checkout source code
         uses: actions/checkout@v4

diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
@@ -19,11 +19,11 @@ jobs:
             || fromJSON('["self-hosted"]') }}
         toolchain: >-
           ${{ github.event_name == 'push' && github.ref == 'refs/heads/main'
-            && fromJSON('["stable","beta","1.75.0"]')
-            || fromJSON('["1.75.0"]') }}
+            && fromJSON('["stable","beta","1.85.0"]')
+            || fromJSON('["1.85.0"]') }}
         exclude:
           - platform: windows-latest
-            toolchain: 1.75.0
+            toolchain: 1.85.0
           - platform: windows-latest
             toolchain: beta
           - platform: macos-latest
@@ -40,7 +40,7 @@ jobs:
         shell: bash
         run: echo "RUSTFLAGS=-C linker=rust-lld" >> "$GITHUB_ENV"
       - name: Set RUSTFLAGS to deny warnings
-        if: "matrix.toolchain == '1.75.0'"
+        if: "matrix.toolchain == '1.85.0'"
         run: echo "RUSTFLAGS=-D warnings" >> "$GITHUB_ENV"
       - name: Install no-std-check dependencies for ARM Embedded
         if: matrix.platform == 'self-hosted'

diff --git a/CLAUDE.md b/CLAUDE.md
@@ -11,11 +11,11 @@ See [README.md](README.md) for the workspace layout and [ARCH.md](ARCH.md) for s
 ## Development Rules
 
 - Always ensure tests pass before committing. To this end, you should run
-  `cargo +1.75.0 test` for all affected crates and/or features. Upon completion
+  `cargo +1.85.0 test` for all affected crates and/or features. Upon completion
   of the full task you might prompt the user whether they want you to run the
   full CI tests via `./ci/ci-tests.sh`. Note however that this script will run
   for a very long time, so please don't timeout when you do.
-- Run `cargo +1.75.0 fmt --all` before committing code changes. If rust 1.75.0 is
+- Run `cargo +1.85.0 fmt --all` before committing code changes. If rust 1.85.0 is
   not installed, skip this step.
 - Never add new dependencies unless explicitly requested
 - Please always disclose the use of any AI tools in commit messages and PR descriptions using a `Co-Authored-By:` line.

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -88,7 +88,7 @@ be covered by functional tests.
 When refactoring, structure your PR to make it easy to review and don't
 hesitate to split it into multiple small, focused PRs.
 
-The Minimum Supported Rust Version (MSRV) currently is 1.75.0 (enforced by
+The Minimum Supported Rust Version (MSRV) currently is 1.85.0 (enforced by
 our GitHub Actions). We support reading serialized LDK objects written by any
 version of LDK 0.0.99 and above. We support LDK versions 0.0.113 and above
 reading serialized LDK objects written by modern LDK. Any expected issues with
@@ -124,7 +124,7 @@ display fine at any tab-length display setting. We use `rustfmt` to establish
 uniform coding standards throughout the codebase. Please run
 
 ```bash
-cargo +1.75.0 fmt
+cargo +1.85.0 fmt
 ```
 
 before committing and pushing any changes, as compliance will also be checked

diff --git a/bench/Cargo.toml b/bench/Cargo.toml
@@ -2,7 +2,7 @@
 name = "lightning-bench"
 version = "0.0.1"
 authors = ["Matt Corallo"]
-edition = "2021"
+edition = "2024"
 
 [[bench]]
 name = "bench"
@@ -12,7 +12,7 @@ harness = false
 lightning = { path = "../lightning", features = ["_test_utils", "criterion"] }
 lightning-persister = { path = "../lightning-persister", features = ["criterion"] }
 lightning-rapid-gossip-sync = { path = "../lightning-rapid-gossip-sync", features = ["criterion"] }
-criterion = { version = "0.4", default-features = false }
+criterion = { version = "0.5", default-features = false }
 
 [profile.release]
 opt-level = 3

diff --git a/ci/ci-tests-common.sh b/ci/ci-tests-common.sh
@@ -3,8 +3,6 @@
 # Source this file; do not execute it directly.
 # shellcheck disable=SC2002,SC2207
 
-RUSTC_MINOR_VERSION=$(rustc --version | awk '{ split($2,a,"."); print a[2] }')
-
 # Some crates require pinning to meet our MSRV even for our downstream users,
 # which we do here.
 # Further crates which appear only as dev-dependencies are pinned further down.
@@ -14,13 +12,4 @@ function PIN_RELEASE_DEPS {
 
 PIN_RELEASE_DEPS # pin the release dependencies in our main workspace
 
-# The backtrace v0.3.75 crate relies on rustc 1.82
-[ "$RUSTC_MINOR_VERSION" -lt 82 ] && cargo update -p backtrace --precise "0.3.74" --quiet
-
-# Starting with version 1.2.0, the `idna_adapter` crate has an MSRV of rustc 1.81.0.
-[ "$RUSTC_MINOR_VERSION" -lt 81 ] && cargo update -p idna_adapter --precise "1.1.0" --quiet
-
-# Starting with version 0.27.8, the `hyper-rustls` crate has an MSRV of rustc 1.85.0.
-[ "$RUSTC_MINOR_VERSION" -lt 85 ] && cargo update -p hyper-rustls --precise "0.27.7" --quiet
-
 export RUST_BACKTRACE=1
diff --git a/ext-functional-test-demo/Cargo.toml b/ext-functional-test-demo/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "ext-functional-tester"
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 
 [features]
 test-broken = []

diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
@@ -3,7 +3,7 @@ name = "lightning-fuzz"
 version = "0.0.1"
 authors = ["Automatically generated"]
 publish = false
-edition = "2021"
+edition = "2024"
 
 [dependencies]
 lightning = { path = "../lightning", features = ["regex", "_test_utils"] }

diff --git a/fuzz/fuzz-fake-hashes/Cargo.toml b/fuzz/fuzz-fake-hashes/Cargo.toml
@@ -3,7 +3,7 @@ name = "lightning-fuzz-fake-hashes"
 version = "0.0.1"
 authors = ["Automatically generated"]
 publish = false
-edition = "2021"
+edition = "2024"
 
 [package.metadata]
 cargo-fuzz = true

diff --git a/fuzz/fuzz-real-hashes/Cargo.toml b/fuzz/fuzz-real-hashes/Cargo.toml
@@ -3,7 +3,7 @@ name = "lightning-fuzz-real-hashes"
 version = "0.0.1"
 authors = ["Automatically generated"]
 publish = false
-edition = "2021"
+edition = "2024"
 
 [package.metadata]
 cargo-fuzz = true

diff --git a/fuzz/src/base32.rs b/fuzz/src/base32.rs
@@ -52,7 +52,7 @@ pub fn base32_test<Out: test_logger::Output>(data: &[u8], _out: Out) {
 	do_test(data);
 }
 
-#[no_mangle]
+#[unsafe(no_mangle)]
 pub extern "C" fn base32_run(data: *const u8, datalen: usize) {
 	do_test(unsafe { std::slice::from_raw_parts(data, datalen) });
 }
diff --git a/fuzz/src/bech32_parse.rs b/fuzz/src/bech32_parse.rs
@@ -51,7 +51,7 @@ pub fn bech32_parse_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 	do_test(data, out);
 }
 
-#[no_mangle]
+#[unsafe(no_mangle)]
 pub extern "C" fn bech32_parse_run(data: *const u8, datalen: usize) {
 	do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull {});
 }
diff --git a/fuzz/src/bolt11_deser.rs b/fuzz/src/bolt11_deser.rs
@@ -70,7 +70,7 @@ pub fn bolt11_deser_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 	do_test(data, out);
 }
 
-#[no_mangle]
+#[unsafe(no_mangle)]
 pub extern "C" fn bolt11_deser_run(data: *const u8, datalen: usize) {
 	do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull {});
 }