diff options
Diffstat (limited to 'test/functional/test_framework/wallet.py')
| -rw-r--r-- | test/functional/test_framework/wallet.py | 37 |
1 files changed, 23 insertions, 14 deletions
diff --git a/test/functional/test_framework/wallet.py b/test/functional/test_framework/wallet.py index bfb5916c37..47ec6b0be2 100644 --- a/test/functional/test_framework/wallet.py +++ b/test/functional/test_framework/wallet.py @@ -6,6 +6,7 @@ from decimal import Decimal from enum import Enum +from typing import Optional from test_framework.address import ADDRESS_BCRT1_P2WSH_OP_TRUE from test_framework.key import ECKey from test_framework.messages import ( @@ -87,12 +88,20 @@ class MiniWallet: if out['scriptPubKey']['hex'] == self._scriptPubKey.hex(): self._utxos.append({'txid': tx['txid'], 'vout': out['n'], 'value': out['value']}) - def sign_tx(self, tx): + 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) = LegacySignatureHash(CScript(self._scriptPubKey), tx, 0, SIGHASH_ALL) assert err is None - tx.vin[0].scriptSig = CScript([self._priv_key.sign_ecdsa(sighash) + bytes(bytearray([SIGHASH_ALL]))]) + # 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): """Generate blocks with coinbase outputs to the internal address, and append the outputs to the internal list""" @@ -105,12 +114,12 @@ class MiniWallet: def get_address(self): return self._address - def get_utxo(self, *, txid='', mark_as_spent=True): + 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 (string), optional: get the first utxo we find from a specific transaction + txid: get the first utxo we find from a specific transaction Note: Can be used to get the change output immediately after a send_self_transfer """ @@ -123,23 +132,26 @@ class MiniWallet: else: return self._utxos[index] - def send_self_transfer(self, *, fee_rate=Decimal("0.003"), from_node, utxo_to_spend=None, locktime=0): + 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(fee_rate=fee_rate, from_node=from_node, utxo_to_spend=utxo_to_spend) - self.sendrawtransaction(from_node=from_node, tx_hex=tx['hex']) + 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): + 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.""" self._utxos = sorted(self._utxos, key=lambda k: k['value']) utxo_to_spend = utxo_to_spend or self._utxos.pop() # Pick the largest utxo (if none provided) and hope it covers the fee - vsize = Decimal(96) + if self._priv_key is None: + vsize = Decimal(96) # anyone-can-spend + else: + vsize = Decimal(168) # P2PK (73 bytes scriptSig + 35 bytes scriptPubKey + 60 bytes other) send_value = satoshi_round(utxo_to_spend['value'] - fee_rate * (vsize / 1000)) fee = utxo_to_spend['value'] - send_value assert send_value > 0 tx = CTransaction() - tx.vin = [CTxIn(COutPoint(int(utxo_to_spend['txid'], 16), utxo_to_spend['vout']))] + tx.vin = [CTxIn(COutPoint(int(utxo_to_spend['txid'], 16), utxo_to_spend['vout']), nSequence=sequence)] tx.vout = [CTxOut(int(send_value * COIN), self._scriptPubKey)] tx.nLockTime = locktime if not self._address: @@ -158,10 +170,7 @@ class MiniWallet: tx_info = from_node.testmempoolaccept([tx_hex])[0] assert_equal(mempool_valid, tx_info['allowed']) if mempool_valid: - # TODO: for P2PK, vsize is not constant due to varying scriptSig length, - # so only check this for anyone-can-spend outputs right now - if self._priv_key is None: - assert_equal(tx_info['vsize'], vsize) + assert_equal(tx_info['vsize'], vsize) assert_equal(tx_info['fees']['base'], fee) return {'txid': tx_info['txid'], 'wtxid': tx_info['wtxid'], 'hex': tx_hex, 'tx': tx} |