def input_script_p2wpkh_in_p2sh(pubkeyhash: bytes) -> bytearray:
# 16 00 14 <pubkeyhash>
# Signature is moved to the witness.
w = bytearray_with_cap(3 + len(pubkeyhash))
w.append(0x16) # length of the data
w.append(0x00) # witness version byte
w.append(0x14) # P2WPKH witness program (pub key hash length)
write_bytes(w, pubkeyhash) # pub key hash
return w
def output_script_native_p2wpkh_or_p2wsh(witprog: bytes) -> bytearray:
# Either:
# 00 14 <20-byte-key-hash>
# 00 20 <32-byte-script-hash>
w = bytearray_with_cap(3 + len(witprog))
w.append(0x00) # witness version byte
w.append(
len(witprog)) # pub key hash length is 20 (P2WPKH) or 32 (P2WSH) bytes
write_bytes(w, witprog) # pub key hash
return w
def input_script_p2wsh_in_p2sh(script_hash: bytes) -> bytearray:
# 22 00 20 <redeem script hash>
# Signature is moved to the witness.
if len(script_hash) != 32:
raise ScriptsError('Redeem script hash should be 32 bytes long')
w = bytearray_with_cap(3 + len(script_hash))
w.append(0x22) # length of the data
w.append(0x00) # witness version byte
w.append(0x20) # P2WSH witness program (redeem script hash length)
write_bytes(w, script_hash)
return w
def output_script_paytoopreturn(data: bytes) -> bytearray:
w = bytearray_with_cap(1 + 5 + len(data))
w.append(0x6A) # OP_RETURN
write_op_push(w, len(data))
w.extend(data)
return w
def input_script_p2pkh_or_p2sh(pubkey: bytes, signature: bytes,
sighash: int) -> bytearray:
w = bytearray_with_cap(5 + len(signature) + 1 + 5 + len(pubkey))
append_signature(w, signature, sighash)
append_pubkey(w, pubkey)
return w
def witness_p2wpkh(signature: bytes, pubkey: bytes, sighash: int):
w = bytearray_with_cap(1 + 5 + len(signature) + 1 + 5 + len(pubkey))
write_varint(w, 0x02) # num of segwit items, in P2WPKH it's always 2
append_signature(w, signature, sighash)
append_pubkey(w, pubkey)
return w
