def witness_p2wsh(
multisig: MultisigRedeemScriptType,
signature: bytes,
signature_index: int,
sighash: int,
):
# get other signatures, stretch with None to the number of the pubkeys
signatures = multisig.signatures + [None] * (
multisig_get_pubkey_count(multisig) - len(multisig.signatures)
)
# fill in our signature
if signatures[signature_index]:
raise ScriptsError("Invalid multisig parameters")
signatures[signature_index] = signature
# filter empty
signatures = [s for s in signatures if s]
# witness program + signatures + redeem script
num_of_witness_items = 1 + len(signatures) + 1
w = bytearray()
write_varint(w, num_of_witness_items)
write_varint(w, 0) # version 0 witness program
for s in signatures:
append_signature(w, s, sighash) # size of the witness included
# redeem script
pubkeys = multisig_get_pubkeys(multisig)
redeem_script = output_script_multisig(pubkeys, multisig.m)
write_varint(w, len(redeem_script))
write_bytes(w, redeem_script)
return w
def witness_p2wsh(
multisig: MultisigRedeemScriptType,
signature: bytes,
signature_index: int,
sighash: int,
) -> bytearray:
# get other signatures, stretch with None to the number of the pubkeys
signatures = multisig.signatures + [None] * (
multisig_get_pubkey_count(multisig) - len(multisig.signatures)
)
# fill in our signature
if signatures[signature_index]:
raise ScriptsError("Invalid multisig parameters")
signatures[signature_index] = signature
# filter empty
signatures = [s for s in signatures if s]
# witness program + signatures + redeem script
num_of_witness_items = 1 + len(signatures) + 1
# 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 = 1 + 1 # number of items, 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)
write_varint(w, num_of_witness_items)
# 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
write_varint(w, 0)
for s in signatures:
append_signature(w, s, sighash) # size of the witness included
# redeem script
write_varint(w, redeem_script_length)
write_output_script_multisig(w, pubkeys, multisig.m)
return w