def input_script_multisig(
multisig: MultisigRedeemScriptType,
signature: bytes,
signature_index: int,
sighash: int,
):
signatures = multisig.signatures # other signatures
if len(signatures[signature_index]) > 0:
raise ScriptsError("Invalid multisig parameters")
signatures[signature_index] = signature # our signature
w = bytearray()
# Starts with OP_FALSE because of an old OP_CHECKMULTISIG bug, which
# consumes one additional item on the stack:
# https://bitcoin.org/en/developer-guide#standard-transactions
w.append(0x00)
for s in signatures:
if len(s):
append_signature(w, s, sighash)
# redeem script
pubkeys = multisig_get_pubkeys(multisig)
redeem_script = output_script_multisig(pubkeys, multisig.m)
write_op_push(w, len(redeem_script))
write_bytes(w, redeem_script)
return w
def input_script_multisig(
multisig: MultisigRedeemScriptType,
signature: bytes,
signature_index: int,
sighash: int,
coin: CoinInfo,
) -> bytearray:
signatures = multisig.signatures # other signatures
if len(signatures[signature_index]) > 0:
raise ScriptsError("Invalid multisig parameters")
signatures[signature_index] = signature # our signature
# length of the redeem script
pubkeys = multisig_get_pubkeys(multisig)
redeem_script_length = output_script_multisig_length(pubkeys, multisig.m)
# length of the result
total_length = 0
if utils.BITCOIN_ONLY or not coin.decred:
total_length += 1 # OP_FALSE
for s in signatures:
total_length += 1 + len(s) + 1 # length, signature, sighash
total_length += 1 + redeem_script_length # length, script
w = empty_bytearray(total_length)
if utils.BITCOIN_ONLY or not coin.decred:
# Starts with OP_FALSE because of an old OP_CHECKMULTISIG bug, which
# consumes one additional item on the stack:
# https://bitcoin.org/en/developer-guide#standard-transactions
w.append(0x00)
for s in signatures:
if len(s):
append_signature(w, s, sighash)
# redeem script
write_op_push(w, redeem_script_length)
write_output_script_multisig(w, pubkeys, multisig.m)
return w
def append_pubkey(w: bytearray, pubkey: bytes) -> bytearray:
write_op_push(w, len(pubkey))
write_bytes(w, pubkey)
return w
def append_signature(w: bytearray, signature: bytes,
sighash: int) -> bytearray:
write_op_push(w, len(signature) + 1)
write_bytes(w, signature)
w.append(sighash)
return w
def output_script_paytoopreturn(data: bytes) -> bytearray:
w = empty_bytearray(1 + 5 + len(data))
w.append(0x6A) # OP_RETURN
write_op_push(w, len(data))
w.extend(data)
return w
def append_pubkey(w: Writer, pubkey: bytes) -> None:
write_op_push(w, len(pubkey))
write_bytes_unchecked(w, pubkey)
def append_signature(w: Writer, signature: bytes, sighash: int) -> None:
write_op_push(w, len(signature) + 1)
write_bytes_unchecked(w, signature)
w.append(sighash)