Function IsDefinedHashtypeSignature

src/script/interpreter.cpp:196–205

}

bool static IsDefinedHashtypeSignature(const valtype &vchSig) {
    if (vchSig.size() == 0) {
        return false;
    }
    unsigned char nHashType = GetHashType(vchSig) & (~(SIGHASH_ANYONECANPAY | SIGHASH_FORKID));
    if (nHashType < SIGHASH_ALL || nHashType > SIGHASH_SINGLE)
        return false;

    return true;
}

bool static UsesForkId(uint32_t nHashType) {
    return nHashType & SIGHASH_FORKID;