Module solana_program::secp256k1_recover

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, Safecoin also provides the secp256k1 program, which is more flexible, has lower CPU cost, and can validate many signatures at once.

Structs

• Secp256k1Pubkey

Enums

• Secp256k1RecoverError

Constants

• SECP256K1_PUBLIC_KEY_LENGTH
• SECP256K1_SIGNATURE_LENGTH

Functions

• secp256k1_recover
  Recover the public key from a secp256k1 ECDSA signature and cryptographically-hashed message.