vroom

[wjblanke]

DO NOT MERGE

with

cargo test -p blst --features vroom

without

cargo test -p blst

I changed the pairing related tests to loop 100 times to do kind of a benchmark.

On Ryzen 7 7800X3D under WSL Ubuntu I didn't see much difference. 16.4 seconds either way

---

Note

High Risk
Touches cryptography build/linking and pairing implementation selection, with a large new vendored blst surface and optional alternate native code path that can impact correctness and platform builds.

Overview
Introduces git submodules for vroom and blst-src and overrides crates.io blst via [patch.crates-io]/workspace deps to ensure the workspace links a single native blst implementation.

Adds a new local crates/blst crate (bindings + build script) that compiles blst-src, and when the vroom feature is enabled, stages a copy of the sources with pairing.c replaced by VROOM’s version; chia-bls exposes a vroom feature and documents the pairing backend behavior/clone requirements in README.md.

^{Written by Cursor Bugbot for commit 65ea962. This will update automatically on new commits. Configure here.}

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

Autofix Details

Bugbot Autofix prepared a fix for the issue found in the latest run.

• ✅ Fixed: Experimental vroom feature enabled by default contradicts documentation
  • I made vroom opt-in by changing chia-bls default features to empty so the standard backend remains default unless explicitly enabled.

Or push these changes by commenting:

@cursor push 37e9c05f7f

Preview (37e9c05f7f)

diff --git a/crates/chia-bls/Cargo.toml b/crates/chia-bls/Cargo.toml
--- a/crates/chia-bls/Cargo.toml
+++ b/crates/chia-bls/Cargo.toml
@@ -12,7 +12,7 @@
 workspace = true
 
 [features]
-default = ["vroom"]
+default = []
 py-bindings = ["dep:pyo3", "dep:chia_py_streamable_macro", "chia-traits/py-bindings"]
 arbitrary = ["dep:arbitrary"]
 serde = ["dep:serde", "dep:chia-serde"]

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[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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