IsSortedAndUniqueSECP2561RSigs returns true if [sigs] is sorted.

SortSECP2561RSigs sorts a slice of SECP2561R signatures.

SECP256K1RPKLen is the number of bytes in a secp2561k recoverable public key.

SECP256K1RSigLen is the number of bytes in a secp2561k recoverable signature.

SECP256K1RSKLen is the number of bytes in a secp2561k recoverable private key.