test: add test for utxo-to-sqlite conversion script

test/functional/test_runner.py

@@ -282,6 +282,7 @@ BASE_SCRIPTS = [
     'mempool_packages.py',
     'mempool_package_onemore.py',
     'mempool_package_limits.py',
+    'tool_utxo_to_sqlite.py',
     'feature_versionbits_warning.py',
     'rpc_preciousblock.py',
     'wallet_importprunedfunds.py --legacy-wallet',

test/functional/tool_utxo_to_sqlite.py

@@ -0,0 +1,112 @@
+#!/usr/bin/env python3
+# Copyright (c) 2023 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test utxo-to-sqlite conversion tool"""
+import os.path
+try:
+    import sqlite3
+except ImportError:
+    pass
+import subprocess
+import sys
+
+from test_framework.key import ECKey
+from test_framework.messages import (
+    COutPoint,
+    CTxOut,
+)
+from test_framework.crypto.muhash import MuHash3072
+from test_framework.script import (
+    CScript,
+    CScriptOp,
+)
+from test_framework.script_util import (
+    key_to_p2pk_script,
+    key_to_p2pkh_script,
+    key_to_p2wpkh_script,
+    keys_to_multisig_script,
+    output_key_to_p2tr_script,
+    script_to_p2sh_script,
+    script_to_p2wsh_script,
+)
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import (
+    assert_equal,
+)
+from test_framework.wallet import MiniWallet
+
+
+class UtxoToSqliteTest(BitcoinTestFramework):
+    def set_test_params(self):
+        self.num_nodes = 1
+        # we want to create some UTXOs with non-standard output scripts
+        self.extra_args = [['-acceptnonstdtxn=1']]
+
+    def skip_test_if_missing_module(self):
+        self.skip_if_no_sqlite()
+
+    def run_test(self):
+        node = self.nodes[0]
+        wallet = MiniWallet(node)
+        key = ECKey()
+
+        self.log.info('Create UTXOs with various output script types')
+        for i in range(1, 10+1):
+            key.generate(compressed=False)
+            uncompressed_pubkey = key.get_pubkey().get_bytes()
+            key.generate(compressed=True)
+            pubkey = key.get_pubkey().get_bytes()
+
+            # add output scripts for compressed script type 0 (P2PKH), type 1 (P2SH),
+            # types 2-3 (P2PK compressed), types 4-5 (P2PK uncompressed) and
+            # for uncompressed scripts (bare multisig, segwit, etc.)
+            output_scripts = (
+                key_to_p2pkh_script(pubkey),
+                script_to_p2sh_script(key_to_p2pkh_script(pubkey)),
+                key_to_p2pk_script(pubkey),
+                key_to_p2pk_script(uncompressed_pubkey),
+
+                keys_to_multisig_script([pubkey]*i),
+                keys_to_multisig_script([uncompressed_pubkey]*i),
+                key_to_p2wpkh_script(pubkey),
+                script_to_p2wsh_script(key_to_p2pkh_script(pubkey)),
+                output_key_to_p2tr_script(pubkey[1:]),
+                CScript([CScriptOp.encode_op_n(i)]*(1000*i)),  # large script (up to 10000 bytes)
+            )
+
+            # create outputs and mine them in a block
+            for output_script in output_scripts:
+                wallet.send_to(from_node=node, scriptPubKey=output_script, amount=i, fee=20000)
+            self.generate(wallet, 1)
+
+        self.log.info('Dump UTXO set via `dumptxoutset` RPC')
+        input_filename = os.path.join(self.options.tmpdir, "utxos.dat")
+        node.dumptxoutset(input_filename)
+
+        self.log.info('Convert UTXO set from compact-serialized format to sqlite format')
+        output_filename = os.path.join(self.options.tmpdir, "utxos.sqlite")
+        base_dir = self.config["environment"]["SRCDIR"]
+        utxo_to_sqlite_path = os.path.join(base_dir, "contrib", "utxo-tools", "utxo_to_sqlite.py")
+        subprocess.run([sys.executable, utxo_to_sqlite_path, input_filename, output_filename],
+                       check=True, stderr=subprocess.STDOUT)
+
+        self.log.info('Verify that both UTXO sets match by comparing their MuHash')
+        muhash = MuHash3072()
+        con = sqlite3.connect(output_filename)
+        cur = con.cursor()
+        for (txid_hex, vout, value, coinbase, height, spk_hex) in cur.execute("SELECT * FROM utxos"):
+            # serialize UTXO for MuHash (see function `TxOutSer` in the  coinstats module)
+            utxo_ser = COutPoint(int(txid_hex, 16), vout).serialize()
+            utxo_ser += (height * 2 + coinbase).to_bytes(4, 'little')
+            utxo_ser += CTxOut(value, bytes.fromhex(spk_hex)).serialize()
+            muhash.insert(utxo_ser)
+        con.close()
+
+        muhash_sqlite = muhash.digest()[::-1].hex()
+        muhash_compact_serialized = node.gettxoutsetinfo('muhash')['muhash']
+        assert_equal(muhash_sqlite, muhash_compact_serialized)
+
+
+if __name__ == "__main__":
+    UtxoToSqliteTest().main()