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diff --git a/test/functional/test_framework/wallet_util.py b/test/functional/test_framework/wallet_util.py
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+#!/usr/bin/env python3
+# Copyright (c) 2018 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Useful util functions for testing the wallet"""
+from collections import namedtuple
+
+from test_framework.address import (
+ key_to_p2pkh,
+ key_to_p2sh_p2wpkh,
+ key_to_p2wpkh,
+ script_to_p2sh,
+ script_to_p2sh_p2wsh,
+ script_to_p2wsh,
+)
+from test_framework.script import (
+ CScript,
+ OP_0,
+ OP_2,
+ OP_3,
+ OP_CHECKMULTISIG,
+ OP_CHECKSIG,
+ OP_DUP,
+ OP_EQUAL,
+ OP_EQUALVERIFY,
+ OP_HASH160,
+ hash160,
+ sha256,
+)
+from test_framework.util import hex_str_to_bytes
+
+Key = namedtuple('Key', ['privkey',
+ 'pubkey',
+ 'p2pkh_script',
+ 'p2pkh_addr',
+ 'p2wpkh_script',
+ 'p2wpkh_addr',
+ 'p2sh_p2wpkh_script',
+ 'p2sh_p2wpkh_redeem_script',
+ 'p2sh_p2wpkh_addr'])
+
+Multisig = namedtuple('Multisig', ['privkeys',
+ 'pubkeys',
+ 'p2sh_script',
+ 'p2sh_addr',
+ 'redeem_script',
+ 'p2wsh_script',
+ 'p2wsh_addr',
+ 'p2sh_p2wsh_script',
+ 'p2sh_p2wsh_addr'])
+
+def get_key(node):
+ """Generate a fresh key on node
+
+ Returns a named tuple of privkey, pubkey and all address and scripts."""
+ addr = node.getnewaddress()
+ pubkey = node.getaddressinfo(addr)['pubkey']
+ pkh = hash160(hex_str_to_bytes(pubkey))
+ return Key(privkey=node.dumpprivkey(addr),
+ pubkey=pubkey,
+ p2pkh_script=CScript([OP_DUP, OP_HASH160, pkh, OP_EQUALVERIFY, OP_CHECKSIG]).hex(),
+ p2pkh_addr=key_to_p2pkh(pubkey),
+ p2wpkh_script=CScript([OP_0, pkh]).hex(),
+ p2wpkh_addr=key_to_p2wpkh(pubkey),
+ p2sh_p2wpkh_script=CScript([OP_HASH160, hash160(CScript([OP_0, pkh])), OP_EQUAL]).hex(),
+ p2sh_p2wpkh_redeem_script=CScript([OP_0, pkh]).hex(),
+ p2sh_p2wpkh_addr=key_to_p2sh_p2wpkh(pubkey))
+
+def get_multisig(node):
+ """Generate a fresh 2-of-3 multisig on node
+
+ Returns a named tuple of privkeys, pubkeys and all address and scripts."""
+ addrs = []
+ pubkeys = []
+ for _ in range(3):
+ addr = node.getaddressinfo(node.getnewaddress())
+ addrs.append(addr['address'])
+ pubkeys.append(addr['pubkey'])
+ script_code = CScript([OP_2] + [hex_str_to_bytes(pubkey) for pubkey in pubkeys] + [OP_3, OP_CHECKMULTISIG])
+ witness_script = CScript([OP_0, sha256(script_code)])
+ return Multisig(privkeys=[node.dumpprivkey(addr) for addr in addrs],
+ pubkeys=pubkeys,
+ p2sh_script=CScript([OP_HASH160, hash160(script_code), OP_EQUAL]).hex(),
+ p2sh_addr=script_to_p2sh(script_code),
+ redeem_script=script_code.hex(),
+ p2wsh_script=witness_script.hex(),
+ p2wsh_addr=script_to_p2wsh(script_code),
+ p2sh_p2wsh_script=CScript([OP_HASH160, witness_script, OP_EQUAL]).hex(),
+ p2sh_p2wsh_addr=script_to_p2sh_p2wsh(script_code))
+
+def test_address(node, address, **kwargs):
+ """Get address info for `address` and test whether the returned values are as expected."""
+ addr_info = node.getaddressinfo(address)
+ for key, value in kwargs.items():
+ if value is None:
+ if key in addr_info.keys():
+ raise AssertionError("key {} unexpectedly returned in getaddressinfo.".format(key))
+ elif addr_info[key] != value:
+ raise AssertionError("key {} value {} did not match expected value {}".format(key, addr_info[key], value))