MPP TestKit - Rust SDK
rust
dev.to
The Rust MPP SDK (mpp-test-sdk on crates.io) implements the full Solana HTTP 402 payment flow in pure async Rust. No Solana SDK dependency. Ed25519 signing, base58, and compact-u16 transaction encoding — all from scratch with ed25519-dalek and num-bigint. Framework-agnostic server middleware via a ChargeResult enum. Why Rust and HTTP 402? Rust is increasingly the language of high-performance APIs, WebAssembly services, and systems that need both speed and correctness. If you're bu