test: Run feature_cltv with MiniWallet

Author: MarcoFalke

test/functional/feature_cltv.py

@@ -11,11 +11,9 @@
 from test_framework.blocktools import (
     create_block,
     create_coinbase,
-    create_transaction,
 )
 from test_framework.messages import (
     CTransaction,
-    ToHex,
     msg_block,
 )
 from test_framework.p2p import P2PInterface
@@ -27,12 +25,8 @@
     OP_DROP,
 )
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import (
-    assert_equal,
-    hex_str_to_bytes,
-)
-
-from io import BytesIO
+from test_framework.util import assert_equal
+from test_framework.wallet import MiniWallet
 
 CLTV_HEIGHT = 1351
 
@@ -41,15 +35,11 @@
 # 1) prepending a given script to the scriptSig of vin 0 and
 # 2) (optionally) modify the nSequence of vin 0 and the tx's nLockTime
 def cltv_modify_tx(node, tx, prepend_scriptsig, nsequence=None, nlocktime=None):
+    assert_equal(len(tx.vin), 1)
     if nsequence is not None:
         tx.vin[0].nSequence = nsequence
         tx.nLockTime = nlocktime
 
-        # Need to re-sign, since nSequence and nLockTime changed
-        signed_result = node.signrawtransactionwithwallet(ToHex(tx))
-        tx = CTransaction()
-        tx.deserialize(BytesIO(hex_str_to_bytes(signed_result['hex'])))
-
     tx.vin[0].scriptSig = CScript(prepend_scriptsig + list(CScript(tx.vin[0].scriptSig)))
     tx.rehash()
     return tx
@@ -97,9 +87,6 @@ def set_test_params(self):
         self.setup_clean_chain = True
         self.rpc_timeout = 480
 
-    def skip_test_if_missing_module(self):
-        self.skip_if_no_wallet()
-
     def test_cltv_info(self, *, is_active):
         assert_equal(self.nodes[0].getblockchaininfo()['softforks']['bip65'], {
                 "active": is_active,
@@ -110,20 +97,20 @@ def test_cltv_info(self, *, is_active):
 
     def run_test(self):
         peer = self.nodes[0].add_p2p_connection(P2PInterface())
+        wallet = MiniWallet(self.nodes[0], raw_script=True)
 
         self.test_cltv_info(is_active=False)
 
         self.log.info("Mining %d blocks", CLTV_HEIGHT - 2)
-        self.coinbase_txids = [self.nodes[0].getblock(b)['tx'][0] for b in self.nodes[0].generate(CLTV_HEIGHT - 2)]
-        self.nodeaddress = self.nodes[0].getnewaddress()
+        wallet.generate(10)
+        self.nodes[0].generate(CLTV_HEIGHT - 2 - 10)
 
         self.log.info("Test that invalid-according-to-CLTV transactions can still appear in a block")
 
         # create one invalid tx per CLTV failure reason (5 in total) and collect them
         invalid_ctlv_txs = []
         for i in range(5):
-            spendtx = create_transaction(self.nodes[0], self.coinbase_txids[i],
-                                         self.nodeaddress, amount=1.0)
+            spendtx = wallet.create_self_transfer(from_node=self.nodes[0])['tx']
             spendtx = cltv_invalidate(self.nodes[0], spendtx, i)
             invalid_ctlv_txs.append(spendtx)
 
@@ -158,8 +145,7 @@ def run_test(self):
 
         # create and test one invalid tx per CLTV failure reason (5 in total)
         for i in range(5):
-            spendtx = create_transaction(self.nodes[0], self.coinbase_txids[10+i],
-                                         self.nodeaddress, amount=1.0)
+            spendtx = wallet.create_self_transfer(from_node=self.nodes[0])['tx']
             spendtx = cltv_invalidate(self.nodes[0], spendtx, i)
 
             expected_cltv_reject_reason = [

test/functional/test_framework/wallet.py

@@ -17,6 +17,7 @@
 from test_framework.script import (
     CScript,
     OP_TRUE,
+    OP_NOP,
 )
 from test_framework.util import (
     assert_equal,
@@ -26,11 +27,15 @@
 
 
 class MiniWallet:
-    def __init__(self, test_node):
+    def __init__(self, test_node, *, raw_script=False):
         self._test_node = test_node
         self._utxos = []
-        self._address = ADDRESS_BCRT1_P2WSH_OP_TRUE
-        self._scriptPubKey = hex_str_to_bytes(self._test_node.validateaddress(self._address)['scriptPubKey'])
+        if raw_script:
+            self._address = None
+            self._scriptPubKey = bytes(CScript([OP_TRUE]))
+        else:
+            self._address = ADDRESS_BCRT1_P2WSH_OP_TRUE
+            self._scriptPubKey = hex_str_to_bytes(self._test_node.validateaddress(self._address)['scriptPubKey'])
 
     def scan_blocks(self, *, start=1, num):
         """Scan the blocks for self._address outputs and add them to self._utxos"""
@@ -47,7 +52,7 @@ def scan_tx(self, tx):
 
     def generate(self, num_blocks):
         """Generate blocks with coinbase outputs to the internal address, and append the outputs to the internal list"""
-        blocks = self._test_node.generatetoaddress(num_blocks, self._address)
+        blocks = self._test_node.generatetodescriptor(num_blocks, f'raw({self._scriptPubKey.hex()})')
         for b in blocks:
             cb_tx = self._test_node.getblock(blockhash=b, verbosity=2)['tx'][0]
             self._utxos.append({'txid': cb_tx['txid'], 'vout': 0, 'value': cb_tx['vout'][0]['value']})
@@ -89,16 +94,20 @@ def create_self_transfer(self, *, fee_rate=Decimal("0.003"), from_node, utxo_to_
         tx = CTransaction()
         tx.vin = [CTxIn(COutPoint(int(utxo_to_spend['txid'], 16), utxo_to_spend['vout']))]
         tx.vout = [CTxOut(int(send_value * COIN), self._scriptPubKey)]
-        tx.wit.vtxinwit = [CTxInWitness()]
-        tx.wit.vtxinwit[0].scriptWitness.stack = [CScript([OP_TRUE])]
+        if not self._address:
+            # raw script
+            tx.vin[0].scriptSig = CScript([OP_NOP] * 35)  # pad to identical size
+        else:
+            tx.wit.vtxinwit = [CTxInWitness()]
+            tx.wit.vtxinwit[0].scriptWitness.stack = [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(tx_info['vsize'], vsize)
             assert_equal(tx_info['fees']['base'], fee)
-        return {'txid': tx_info['txid'], 'wtxid': tx_info['wtxid'], 'hex': tx_hex}
+        return {'txid': tx_info['txid'], 'wtxid': tx_info['wtxid'], 'hex': tx_hex, 'tx': tx}
 
     def sendrawtransaction(self, *, from_node, tx_hex):
         from_node.sendrawtransaction(tx_hex)