A lightweight Rust backend server built with Axum and Tokio, exposing Solana-related APIs.
This backend provides endpoints to generate keypairs, sign/verify messages, transfer SOL, and handle SPL tokens.

This project simplifies Solana development by providing ready-to-use HTTP endpoints that abstract away complex Solana instruction building.
It is stateless, secure, and easily extendable for new Solana features like Token-2022.

• POST /keypair
• Generates a new Solana keypair (public + secret).

• POST /token/create
• Creates a new SPL Token mint with a given authority and decimals.

• POST /token/mint
• Mints new tokens to a destination account.

• POST /message/sign
• Signs a message using a provided secret key.

• POST /message/verify
• Verifies that a signature belongs to a given message and public key.

• POST /send/sol
• Creates a native SOL transfer instruction between two accounts.

• POST /send/token
• Creates an SPL Token transfer instruction between two accounts.

• Uses Ed25519 for message signing and verification.
• Keys encoded in Base58.
• Signatures and instruction data encoded in Base64.
• Structured error handling for safer responses.
• Stateless design (no private key storage).

• 🚫 No private keys are stored on the server.
• ✅ Input validation for all endpoints.
• ✅ Uses secure cryptographic primitives from Solana crates.
• ✅ Proper error handling with no sensitive info leakage.

• Axum – Web framework
• Tokio – Async runtime
• Solana SDK – Solana primitives
• SPL Token – Token program support

MIT License © 2025