Method from_scriptPubKey

bitcoin/wallet.py:219–270

Convert a scriptPubKey to a P2PKH address Raises CBitcoinAddressError if the scriptPubKey isn't of the correct form. accept_non_canonical_pushdata - Allow non-canonical pushes (default True) accept_bare_checksig - Treat bare-checksig as P2PKH scriptPubKeys

(cls, scriptPubKey, accept_non_canonical_pushdata=True, accept_bare_checksig=True)

    @classmethod
    def from_scriptPubKey(cls, scriptPubKey, accept_non_canonical_pushdata=True, accept_bare_checksig=True):
        """Convert a scriptPubKey to a P2PKH address

        Raises CBitcoinAddressError if the scriptPubKey isn't of the correct
        form.

        accept_non_canonical_pushdata - Allow non-canonical pushes (default True)

        accept_bare_checksig          - Treat bare-checksig as P2PKH scriptPubKeys (default True)
        """
        if accept_non_canonical_pushdata:
            # Canonicalize script pushes
            scriptPubKey = script.CScript(scriptPubKey) # in case it's not a CScript instance yet

            try:
                scriptPubKey = script.CScript(tuple(scriptPubKey)) # canonicalize
            except bitcoin.core.script.CScriptInvalidError:
                raise CBitcoinAddressError('not a P2PKH scriptPubKey: script is invalid')

        if scriptPubKey.is_witness_v0_keyhash():
            return cls.from_bytes(scriptPubKey[2:22], bitcoin.params.BASE58_PREFIXES['PUBKEY_ADDR'])
        elif scriptPubKey.is_witness_v0_nested_keyhash():
            return cls.from_bytes(scriptPubKey[3:23], bitcoin.params.BASE58_PREFIXES['PUBKEY_ADDR'])
        elif (len(scriptPubKey) == 25
                and scriptPubKey[0]  == script.OP_DUP
                and scriptPubKey[1]  == script.OP_HASH160
                and scriptPubKey[2]  == 0x14
                and scriptPubKey[23] == script.OP_EQUALVERIFY
                and scriptPubKey[24] == script.OP_CHECKSIG):
            return cls.from_bytes(scriptPubKey[3:23], bitcoin.params.BASE58_PREFIXES['PUBKEY_ADDR'])

        elif accept_bare_checksig:
            pubkey = None

            # We can operate on the raw bytes directly because we've
            # canonicalized everything above.
            if (len(scriptPubKey) == 35 # compressed
                  and scriptPubKey[0]  == 0x21
                  and scriptPubKey[34] == script.OP_CHECKSIG):

                pubkey = scriptPubKey[1:34]

            elif (len(scriptPubKey) == 67 # uncompressed
                    and scriptPubKey[0] == 0x41
                    and scriptPubKey[66] == script.OP_CHECKSIG):

                pubkey = scriptPubKey[1:65]

            if pubkey is not None:
                return cls.from_pubkey(pubkey, accept_invalid=True)

        raise CBitcoinAddressError('not a P2PKH scriptPubKey')

    def to_scriptPubKey(self, nested=False):
        """Convert an address to a scriptPubKey"""