gridtokenx-chain-bridge

Patterns, gotchas, and high-throughput performance guidance for building and maintaining GridTokenX Rust microservices — specifically the chain-bridge service (the Solana signing protocol bridge) and its siblings that use mTLS + SPIFFE identity, connectrpc, NATS JetStream, HashiCorp Vault Transit signing, and Solana RPC. Use this skill whenever the user is working on chain-bridge (crates/chain-bridge-api/src/api/service.rs, crates/chain-bridge-api/src/main.rs, crates/chain-bridge-api/src/middleware.rs, crates/chain-bridge-api/src/nats_consumer/consumer.rs, crates/chain-bridge-api/src/vault.rs), adding a new gRPC handler, adding a new NATS subject, wiring up a new GridTokenX service, debugging mTLS or SPIFFE identity issues, integrating Vault Transit signing, reasoning about RBAC between platform microservices, OR scaling the bridge to high throughput (questions about TPS targets, Vault signing bottlenecks, Solana RPC pooling, NATS worker concurrency, connection reuse, backpressure, latency budgets, or any que

Reviews axum web framework code for routing patterns, extractor usage, middleware, state management, and error handling. Use when reviewing Rust code that uses axum, tower, or hyper for HTTP services. Covers axum 0.7+ patterns including State, Path, Query, Json extractors.

Development guidance for writing idiomatic Rust. Use when: (1) writing new Rust functions or modules, (2) choosing between borrowing, cloning, or ownership patterns, (3) implementing error handling with Result types, (4) optimizing Rust code for performance, (5) configuring clippy and linting for a project, (6) deciding between static and dynamic dispatch, (7) writing documentation or doc tests.

Reviews Rust code for ownership, borrowing, lifetime, error handling, trait design, unsafe usage, and common mistakes. Use when reviewing .rs files, checking borrow checker issues, error handling patterns, or trait implementations. Covers Rust 2024 edition patterns and modern idioms.

Reviews tokio async runtime usage for task management, sync primitives, channel patterns, and runtime configuration. Covers Rust 2024 edition changes including async fn in traits, RPIT lifetime capture, LazyLock, and if-let temporary scoping. Use when reviewing Rust code that uses tokio, async/await patterns, spawn, channels, or async synchronization. Also covers tokio-util, tower, and hyper integration patterns.