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sp_io::crypto

Function secp256k1_ecdsa_recover

Source 
pub fn secp256k1_ecdsa_recover(
    sig: <PassPointerAndRead<&[u8; 65], 65> as RIType>::Inner,
    msg: <PassPointerAndRead<&[u8; 32], 32> as RIType>::Inner,
) -> <AllocateAndReturnByCodec<Result<[u8; 64], EcdsaVerifyError>> as RIType>::Inner
Expand description

Verify and recover a SECP256k1 ECDSA signature.

  • sig is passed in RSV format. V should be either 0/1 or 27/28.
  • msg is the blake2-256 hash of the message.

Returns Err if the signature is bad, otherwise the 64-byte pubkey (doesn’t include the 0x04 prefix).