mirror of
https://github.com/dashpay/dash.git
synced 2024-12-24 19:42:46 +01:00
c2fd4fe379
fa62207737657e76ba45d5bf826fc0ccac658df6 test: Return the largest utxo in MiniWallet.get_utxo (MarcoFalke) Pull request description: This is for consistency with the `send_self_transfer` method. Also, remove the feature that the change of the last transfer can be retrieved via `get_utxo`. This can trivially and clearer be achieved by simply passing the txid of the transfer. Also, this fixes the bug in `feature_txindex_compatibility` in current master after a silent merge conflict. Fixes #23514 Top commit has no ACKs. Tree-SHA512: edd066d372aaa72b4e0fc7526f84931c8d1f6d14f53678cb7832bc8e3d211f44b90ec9c59b7d915ef24acc63a36e7d66c8d3b7598355bd490ac637ed3bcc3dff
262 lines
12 KiB
Python
262 lines
12 KiB
Python
#!/usr/bin/env python3
|
|
# Copyright (c) 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.
|
|
"""A limited-functionality wallet, which may replace a real wallet in tests"""
|
|
|
|
from copy import deepcopy
|
|
from decimal import Decimal
|
|
from enum import Enum
|
|
from test_framework.address import ADDRESS_BCRT1_P2SH_OP_TRUE
|
|
from test_framework.descriptors import descsum_create
|
|
from test_framework.key import ECKey
|
|
from random import choice
|
|
from typing import Optional
|
|
from test_framework.messages import (
|
|
COIN,
|
|
COutPoint,
|
|
CTransaction,
|
|
CTxIn,
|
|
CTxOut,
|
|
tx_from_hex,
|
|
)
|
|
from test_framework.script import (
|
|
CScript,
|
|
SignatureHash,
|
|
OP_CHECKSIG,
|
|
OP_TRUE,
|
|
OP_NOP,
|
|
SIGHASH_ALL,
|
|
)
|
|
from test_framework.util import (
|
|
assert_equal,
|
|
assert_greater_than_or_equal,
|
|
)
|
|
|
|
DEFAULT_FEE = Decimal("0.0001")
|
|
|
|
class MiniWalletMode(Enum):
|
|
"""Determines the transaction type the MiniWallet is creating and spending.
|
|
|
|
For most purposes, the default mode ADDRESS_OP_TRUE should be sufficient;
|
|
it simply uses a fixed P2SH address whose coins are spent with a
|
|
witness stack of OP_TRUE, i.e. following an anyone-can-spend policy.
|
|
However, if the transactions need to be modified by the user (e.g. prepending
|
|
scriptSig for testing opcodes that are activated by a soft-fork), or the txs
|
|
should contain an actual signature, the raw modes RAW_OP_TRUE and RAW_P2PK
|
|
can be useful. Summary of modes:
|
|
|
|
| output | | tx is | can modify | needs
|
|
mode | description | address | standard | scriptSig | signing
|
|
----------------+-------------------+-----------+----------+------------+----------
|
|
ADDRESS_OP_TRUE | anyone-can-spend | bech32 | yes | no | no
|
|
RAW_OP_TRUE | anyone-can-spend | - (raw) | no | yes | no
|
|
RAW_P2PK | pay-to-public-key | - (raw) | yes | yes | yes
|
|
"""
|
|
ADDRESS_OP_TRUE = 1
|
|
RAW_OP_TRUE = 2
|
|
RAW_P2PK = 3
|
|
|
|
|
|
class MiniWallet:
|
|
def __init__(self, test_node, *, mode=MiniWalletMode.ADDRESS_OP_TRUE):
|
|
self._test_node = test_node
|
|
self._utxos = []
|
|
self._priv_key = None
|
|
self._address = None
|
|
|
|
assert isinstance(mode, MiniWalletMode)
|
|
if mode == MiniWalletMode.RAW_OP_TRUE:
|
|
self._scriptPubKey = bytes(CScript([OP_TRUE]))
|
|
elif mode == MiniWalletMode.RAW_P2PK:
|
|
# use simple deterministic private key (k=1)
|
|
self._priv_key = ECKey()
|
|
self._priv_key.set((1).to_bytes(32, 'big'), True)
|
|
pub_key = self._priv_key.get_pubkey()
|
|
self._scriptPubKey = bytes(CScript([pub_key.get_bytes(), OP_CHECKSIG]))
|
|
elif mode == MiniWalletMode.ADDRESS_OP_TRUE:
|
|
self._address = ADDRESS_BCRT1_P2SH_OP_TRUE
|
|
self._scriptPubKey = bytes.fromhex(self._test_node.validateaddress(self._address)['scriptPubKey'])
|
|
|
|
def rescan_utxos(self):
|
|
"""Drop all utxos and rescan the utxo set"""
|
|
self._utxos = []
|
|
res = self._test_node.scantxoutset(action="start", scanobjects=[self.get_descriptor()])
|
|
assert_equal(True, res['success'])
|
|
for utxo in res['unspents']:
|
|
self._utxos.append({'txid': utxo['txid'], 'vout': utxo['vout'], 'value': utxo['amount'], 'height': utxo['height']})
|
|
|
|
def scan_blocks(self, *, start=1, num):
|
|
"""Scan the blocks for self._address outputs and add them to self._utxos"""
|
|
for i in range(start, start + num):
|
|
block = self._test_node.getblock(blockhash=self._test_node.getblockhash(i), verbosity=2)
|
|
for tx in block['tx']:
|
|
self.scan_tx(tx)
|
|
|
|
def scan_tx(self, tx):
|
|
"""Scan the tx for self._scriptPubKey outputs and add them to self._utxos"""
|
|
for out in tx['vout']:
|
|
if out['scriptPubKey']['hex'] == self._scriptPubKey.hex():
|
|
self._utxos.append({'txid': tx['txid'], 'vout': out['n'], 'value': out['value'], 'height': 0})
|
|
|
|
def sign_tx(self, tx, fixed_length=True):
|
|
"""Sign tx that has been created by MiniWallet in P2PK mode"""
|
|
assert self._priv_key is not None
|
|
(sighash, err) = SignatureHash(CScript(self._scriptPubKey), tx, 0, SIGHASH_ALL)
|
|
assert err is None
|
|
# for exact fee calculation, create only signatures with fixed size by default (>49.89% probability):
|
|
# 65 bytes: high-R val (33 bytes) + low-S val (32 bytes)
|
|
# with the DER header/skeleton data of 6 bytes added, this leads to a target size of 71 bytes
|
|
der_sig = b''
|
|
while not len(der_sig) == 71:
|
|
der_sig = self._priv_key.sign_ecdsa(sighash)
|
|
if not fixed_length:
|
|
break
|
|
tx.vin[0].scriptSig = CScript([der_sig + bytes(bytearray([SIGHASH_ALL]))])
|
|
|
|
def generate(self, num_blocks, **kwargs):
|
|
"""Generate blocks with coinbase outputs to the internal address, and append the outputs to the internal list"""
|
|
blocks = self._test_node.generatetodescriptor(num_blocks, self.get_descriptor(), **kwargs)
|
|
for b in blocks:
|
|
block_info = self._test_node.getblock(blockhash=b, verbosity=2)
|
|
cb_tx = block_info['tx'][0]
|
|
self._utxos.append({'txid': cb_tx['txid'], 'vout': 0, 'value': cb_tx['vout'][0]['value'], 'height': block_info['height']})
|
|
return blocks
|
|
|
|
def get_descriptor(self):
|
|
return descsum_create(f'raw({self._scriptPubKey.hex()})')
|
|
|
|
def get_address(self):
|
|
return self._address
|
|
|
|
def get_utxo(self, *, txid: Optional[str]='', mark_as_spent=True):
|
|
"""
|
|
Returns a utxo and marks it as spent (pops it from the internal list)
|
|
|
|
Args:
|
|
txid: get the first utxo we find from a specific transaction
|
|
"""
|
|
index = -1 # by default the last utxo
|
|
self._utxos = sorted(self._utxos, key=lambda k: (k['value'], -k['height'])) # Put the largest utxo last
|
|
if txid:
|
|
utxo = next(filter(lambda utxo: txid == utxo['txid'], self._utxos))
|
|
index = self._utxos.index(utxo)
|
|
if mark_as_spent:
|
|
return self._utxos.pop(index)
|
|
else:
|
|
return self._utxos[index]
|
|
|
|
def send_self_transfer(self, **kwargs):
|
|
"""Create and send a tx with the specified fee_rate. Fee may be exact or at most one satoshi higher than needed."""
|
|
tx = self.create_self_transfer(**kwargs)
|
|
self.sendrawtransaction(from_node=kwargs['from_node'], tx_hex=tx['hex'])
|
|
return tx
|
|
|
|
def create_self_transfer(self, *, fee_rate=Decimal("0.003"), from_node, utxo_to_spend=None, mempool_valid=True, locktime=0, sequence=0):
|
|
"""Create and return a tx with the specified fee_rate. Fee may be exact or at most one satoshi higher than needed."""
|
|
utxo_to_spend = utxo_to_spend or self.get_utxo()
|
|
if self._priv_key is None:
|
|
vsize = Decimal(85) # anyone-can-spend
|
|
else:
|
|
vsize = Decimal(168) # P2PK (73 bytes scriptSig + 35 bytes scriptPubKey + 60 bytes other)
|
|
send_value = int(COIN * (utxo_to_spend['value'] - fee_rate * (vsize / 1000)))
|
|
assert send_value > 0
|
|
|
|
tx = CTransaction()
|
|
tx.vin = [CTxIn(COutPoint(int(utxo_to_spend['txid'], 16), utxo_to_spend['vout']), nSequence=sequence)]
|
|
tx.vout = [CTxOut(send_value, self._scriptPubKey)]
|
|
tx.nLockTime = locktime
|
|
if not self._address:
|
|
# raw script
|
|
if self._priv_key is not None:
|
|
# P2PK, need to sign
|
|
self.sign_tx(tx)
|
|
else:
|
|
# anyone-can-spend
|
|
tx.vin[0].scriptSig = CScript([OP_NOP] * 24) # pad to identical size
|
|
else:
|
|
tx.vin[0].scriptSig = CScript([CScript([OP_TRUE])])
|
|
tx_hex = tx.serialize().hex()
|
|
|
|
tx_info = from_node.testmempoolaccept([tx_hex])[0]
|
|
assert_equal(mempool_valid, tx_info['allowed'])
|
|
if mempool_valid:
|
|
assert_equal(len(tx_hex) // 2, vsize) # 1 byte = 2 character
|
|
assert_equal(tx_info['fees']['base'], utxo_to_spend['value'] - Decimal(send_value) / COIN)
|
|
return {'txid': tx_info['txid'], 'hex': tx_hex, 'tx': tx}
|
|
|
|
def sendrawtransaction(self, *, from_node, tx_hex):
|
|
from_node.sendrawtransaction(tx_hex)
|
|
self.scan_tx(from_node.decoderawtransaction(tx_hex))
|
|
|
|
def make_chain(node, address, privkeys, parent_txid, parent_value, n=0, parent_locking_script=None, fee=DEFAULT_FEE):
|
|
"""Build a transaction that spends parent_txid.vout[n] and produces one output with
|
|
amount = parent_value with a fee deducted.
|
|
Return tuple (CTransaction object, raw hex, nValue, scriptPubKey of the output created).
|
|
"""
|
|
inputs = [{"txid": parent_txid, "vout": n}]
|
|
my_value = parent_value - fee
|
|
outputs = {address : my_value}
|
|
rawtx = node.createrawtransaction(inputs, outputs)
|
|
prevtxs = [{
|
|
"txid": parent_txid,
|
|
"vout": n,
|
|
"scriptPubKey": parent_locking_script,
|
|
"amount": parent_value,
|
|
}] if parent_locking_script else None
|
|
signedtx = node.signrawtransactionwithkey(hexstring=rawtx, privkeys=privkeys, prevtxs=prevtxs)
|
|
assert signedtx["complete"]
|
|
tx = tx_from_hex(signedtx["hex"])
|
|
return (tx, signedtx["hex"], my_value, tx.vout[0].scriptPubKey.hex())
|
|
|
|
def create_child_with_parents(node, address, privkeys, parents_tx, values, locking_scripts, fee=DEFAULT_FEE):
|
|
"""Creates a transaction that spends the first output of each parent in parents_tx."""
|
|
num_parents = len(parents_tx)
|
|
total_value = sum(values)
|
|
inputs = [{"txid": tx.rehash(), "vout": 0} for tx in parents_tx]
|
|
outputs = {address : total_value - fee}
|
|
rawtx_child = node.createrawtransaction(inputs, outputs)
|
|
prevtxs = []
|
|
for i in range(num_parents):
|
|
prevtxs.append({"txid": parents_tx[i].rehash(), "vout": 0, "scriptPubKey": locking_scripts[i], "amount": values[i]})
|
|
signedtx_child = node.signrawtransactionwithkey(hexstring=rawtx_child, privkeys=privkeys, prevtxs=prevtxs)
|
|
assert signedtx_child["complete"]
|
|
return signedtx_child["hex"]
|
|
|
|
def create_raw_chain(node, first_coin, address, privkeys, chain_length=25):
|
|
"""Helper function: create a "chain" of chain_length transactions. The nth transaction in the
|
|
chain is a child of the n-1th transaction and parent of the n+1th transaction.
|
|
"""
|
|
parent_locking_script = None
|
|
txid = first_coin["txid"]
|
|
chain_hex = []
|
|
chain_txns = []
|
|
value = first_coin["amount"]
|
|
|
|
for _ in range(chain_length):
|
|
(tx, txhex, value, parent_locking_script) = make_chain(node, address, privkeys, txid, value, 0, parent_locking_script)
|
|
txid = tx.rehash()
|
|
chain_hex.append(txhex)
|
|
chain_txns.append(tx)
|
|
|
|
return (chain_hex, chain_txns)
|
|
|
|
def bulk_transaction(tx, node, target_weight, privkeys, prevtxs=None):
|
|
"""Pad a transaction with extra outputs until it reaches a target weight (or higher).
|
|
returns CTransaction object
|
|
"""
|
|
tx_heavy = deepcopy(tx)
|
|
assert_greater_than_or_equal(target_weight, tx_heavy.get_weight())
|
|
while tx_heavy.get_weight() < target_weight:
|
|
random_spk = "6a4d0200" # OP_RETURN OP_PUSH2 512 bytes
|
|
for _ in range(512*2):
|
|
random_spk += choice("0123456789ABCDEF")
|
|
tx_heavy.vout.append(CTxOut(0, bytes.fromhex(random_spk)))
|
|
# Re-sign the transaction
|
|
if privkeys:
|
|
signed = node.signrawtransactionwithkey(tx_heavy.serialize().hex(), privkeys, prevtxs)
|
|
return tx_from_hex(signed["hex"])
|
|
# OP_TRUE
|
|
tx_heavy.vin[0].scriptSig = CScript([CScript([OP_TRUE])])
|
|
return tx_heavy
|