diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/functional/test_framework/wallet.py | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/test/functional/test_framework/wallet.py b/test/functional/test_framework/wallet.py index 0962a5cb54..4b761128ee 100644 --- a/test/functional/test_framework/wallet.py +++ b/test/functional/test_framework/wallet.py @@ -88,12 +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""" |