mirror of
https://github.com/dashpay/dash.git
synced 2024-12-26 20:42:59 +01:00
4a3e3af6e7
fa0074e2d82928016a43ca408717154a1c70a4db scripted-diff: Bump copyright headers (MarcoFalke)
Pull request description:
Needs to be done because no one has removed the years yet
ACKs for top commit:
practicalswift:
ACK fa0074e2d82928016a43ca408717154a1c70a4db
Tree-SHA512: 210e92acd7d400b556cf8259c3ec9967797420cfd19f0c2a4fa54cb2b3d32ad9ae27e771269201e7d554c0f4cd73a8b1c1a42c9f65d8685ca4d52e5134b071a3
58 lines
2.4 KiB
Python
Executable File
58 lines
2.4 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
# Copyright (c) 2019-2020 The Bitcoin Core developers
|
|
# Distributed under the MIT software license, see the accompanying
|
|
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
"""Useful Script constants and utils."""
|
|
from test_framework.script import CScript, hash160, OP_DUP, OP_HASH160, OP_CHECKSIG, OP_EQUAL, OP_EQUALVERIFY
|
|
from test_framework.util import hex_str_to_bytes
|
|
|
|
# To prevent a "tx-size-small" policy rule error, a transaction has to have a
|
|
# size of at least 83 bytes (MIN_STANDARD_TX_SIZE in
|
|
# src/policy/policy.h). Considering a Tx with the smallest possible single
|
|
# input (blank, empty scriptSig), and with an output omitting the scriptPubKey,
|
|
# we get to a minimum size of 60 bytes:
|
|
#
|
|
# Tx Skeleton: 4 [Version] + 1 [InCount] + 1 [OutCount] + 4 [LockTime] = 10 bytes
|
|
# Blank Input: 32 [PrevTxHash] + 4 [Index] + 1 [scriptSigLen] + 4 [SeqNo] = 41 bytes
|
|
# Output: 8 [Amount] + 1 [scriptPubKeyLen] = 9 bytes
|
|
#
|
|
# Hence, the scriptPubKey of the single output has to have a size of at
|
|
# least 23 bytes, which corresponds to the size of a P2SH scriptPubKey.
|
|
# The following script constant consists of a single push of 22 bytes of 'a':
|
|
# <PUSH_22> <22-bytes of 'a'>
|
|
# resulting in a 23-byte size. It should be used whenever (small) fake
|
|
# scriptPubKeys are needed, to guarantee that the minimum transaction size is
|
|
# met.
|
|
DUMMY_P2SH_SCRIPT = CScript([b'a' * 22])
|
|
DUMMY_2_P2SH_SCRIPT = CScript([b'b' * 22])
|
|
|
|
def keyhash_to_p2pkh_script(hash, main = False):
|
|
assert len(hash) == 20
|
|
return CScript([OP_DUP, OP_HASH160, hash, OP_EQUALVERIFY, OP_CHECKSIG])
|
|
|
|
def scripthash_to_p2sh_script(hash, main = False):
|
|
assert len(hash) == 20
|
|
return CScript([OP_HASH160, hash, OP_EQUAL])
|
|
|
|
def key_to_p2pkh_script(key, main = False):
|
|
key = check_key(key)
|
|
return keyhash_to_p2pkh_script(hash160(key), main)
|
|
|
|
def script_to_p2sh_script(script, main = False):
|
|
script = check_script(script)
|
|
return scripthash_to_p2sh_script(hash160(script), main)
|
|
|
|
def check_key(key):
|
|
if isinstance(key, str):
|
|
key = hex_str_to_bytes(key) # Assuming this is hex string
|
|
if isinstance(key, bytes) and (len(key) == 33 or len(key) == 65):
|
|
return key
|
|
assert False
|
|
|
|
def check_script(script):
|
|
if isinstance(script, str):
|
|
script = hex_str_to_bytes(script) # Assuming this is hex string
|
|
if isinstance(script, bytes) or isinstance(script, CScript):
|
|
return script
|
|
assert False
|