Lib.rs

Public key recovery from secp256k1 ECDSA signatures.

This module provides low-level cryptographic building blocks that must be used carefully to ensure proper security. Read this documentation and accompanying links thoroughly.

The secp256k1_recover syscall allows a secp256k1 public key that has previously signed a message to be recovered from the combination of the message, the signature, and a recovery ID. The recovery ID is generated during signing.

Use cases for secp256k1_recover include:

• Implementing the Ethereum ecrecover builtin contract.
• Performing secp256k1 public key recovery generally.
• Verifying a single secp256k1 signature.

While secp256k1_recover can be used to verify secp256k1 signatures, Solana also provides the secp256k1 program, which is more flexible, has lower CPU cost, and can validate many signatures at once.