#!/usr/bin/env python3 # Copyright (c) 2015-2022 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 multisig RPCs""" import decimal import itertools import json import os from test_framework.address import address_to_scriptpubkey from test_framework.descriptors import descsum_create, drop_origins from test_framework.key import ECPubKey from test_framework.messages import COIN from test_framework.test_framework import BitcoinTestFramework from test_framework.util import ( assert_raises_rpc_error, assert_equal, ) from test_framework.wallet_util import generate_keypair from test_framework.wallet import ( MiniWallet, getnewdestination, ) class RpcCreateMultiSigTest(BitcoinTestFramework): def add_options(self, parser): self.add_wallet_options(parser) def set_test_params(self): self.setup_clean_chain = True self.num_nodes = 3 self.supports_cli = False self.enable_wallet_if_possible() def create_keys(self, num_keys): self.pub = [] self.priv = [] for _ in range(num_keys): privkey, pubkey = generate_keypair(wif=True) self.pub.append(pubkey.hex()) self.priv.append(privkey) def create_wallet(self, node, wallet_name): node.createwallet(wallet_name=wallet_name, disable_private_keys=True) return node.get_wallet_rpc(wallet_name) def run_test(self): node0, node1, node2 = self.nodes self.wallet = MiniWallet(test_node=node0) if self.is_wallet_compiled(): self.check_addmultisigaddress_errors() self.log.info('Generating blocks ...') self.generate(self.wallet, 149) wallet_multi = self.create_wallet(node1, 'wmulti') if self._requires_wallet else None self.create_keys(21) # max number of allowed keys + 1 m_of_n = [(2, 3), (3, 3), (2, 5), (3, 5), (10, 15), (15, 15)] for (sigs, keys) in m_of_n: for output_type in ["bech32", "p2sh-segwit", "legacy"]: self.do_multisig(keys, sigs, output_type, wallet_multi) self.test_multisig_script_limit(wallet_multi) self.test_mixing_uncompressed_and_compressed_keys(node0, wallet_multi) self.test_sortedmulti_descriptors_bip67() # Check that bech32m is currently not allowed assert_raises_rpc_error(-5, "createmultisig cannot create bech32m multisig addresses", self.nodes[0].createmultisig, 2, self.pub, "bech32m") def check_addmultisigaddress_errors(self): if self.options.descriptors: return self.log.info('Check that addmultisigaddress fails when the private keys are missing') addresses = [self.nodes[1].getnewaddress(address_type='legacy') for _ in range(2)] assert_raises_rpc_error(-5, 'no full public key for address', lambda: self.nodes[0].addmultisigaddress(nrequired=1, keys=addresses)) for a in addresses: # Importing all addresses should not change the result self.nodes[0].importaddress(a) assert_raises_rpc_error(-5, 'no full public key for address', lambda: self.nodes[0].addmultisigaddress(nrequired=1, keys=addresses)) # Bech32m address type is disallowed for legacy wallets pubs = [self.nodes[1].getaddressinfo(addr)["pubkey"] for addr in addresses] assert_raises_rpc_error(-5, "Bech32m multisig addresses cannot be created with legacy wallets", self.nodes[0].addmultisigaddress, 2, pubs, "", "bech32m") def test_multisig_script_limit(self, wallet_multi): node1 = self.nodes[1] pubkeys = self.pub[0:20] self.log.info('Test legacy redeem script max size limit') assert_raises_rpc_error(-8, "redeemScript exceeds size limit: 684 > 520", node1.createmultisig, 16, pubkeys, 'legacy') self.log.info('Test valid 16-20 multisig p2sh-legacy and bech32 (no wallet)') self.do_multisig(nkeys=20, nsigs=16, output_type="p2sh-segwit", wallet_multi=None) self.do_multisig(nkeys=20, nsigs=16, output_type="bech32", wallet_multi=None) self.log.info('Test invalid 16-21 multisig p2sh-legacy and bech32 (no wallet)') assert_raises_rpc_error(-8, "Number of keys involved in the multisignature address creation > 20", node1.createmultisig, 16, self.pub, 'p2sh-segwit') assert_raises_rpc_error(-8, "Number of keys involved in the multisignature address creation > 20", node1.createmultisig, 16, self.pub, 'bech32') # Check legacy wallet related command self.log.info('Test legacy redeem script max size limit (with wallet)') if wallet_multi is not None and not self.options.descriptors: assert_raises_rpc_error(-8, "redeemScript exceeds size limit: 684 > 520", wallet_multi.addmultisigaddress, 16, pubkeys, '', 'legacy') self.log.info('Test legacy wallet unsupported operation. 16-20 multisig p2sh-legacy and bech32 generation') # Due an internal limitation on legacy wallets, the redeem script limit also applies to p2sh-segwit and bech32 (even when the scripts are valid) # We take this as a "good thing" to tell users to upgrade to descriptors. assert_raises_rpc_error(-4, "Unsupported multisig script size for legacy wallet. Upgrade to descriptors to overcome this limitation for p2sh-segwit or bech32 scripts", wallet_multi.addmultisigaddress, 16, pubkeys, '', 'p2sh-segwit') assert_raises_rpc_error(-4, "Unsupported multisig script size for legacy wallet. Upgrade to descriptors to overcome this limitation for p2sh-segwit or bech32 scripts", wallet_multi.addmultisigaddress, 16, pubkeys, '', 'bech32') def do_multisig(self, nkeys, nsigs, output_type, wallet_multi): node0, node1, node2 = self.nodes pub_keys = self.pub[0: nkeys] priv_keys = self.priv[0: nkeys] # Construct the expected descriptor desc = 'multi({},{})'.format(nsigs, ','.join(pub_keys)) if output_type == 'legacy': desc = 'sh({})'.format(desc) elif output_type == 'p2sh-segwit': desc = 'sh(wsh({}))'.format(desc) elif output_type == 'bech32': desc = 'wsh({})'.format(desc) desc = descsum_create(desc) msig = node2.createmultisig(nsigs, pub_keys, output_type) assert 'warnings' not in msig madd = msig["address"] mredeem = msig["redeemScript"] assert_equal(desc, msig['descriptor']) if output_type == 'bech32': assert madd[0:4] == "bcrt" # actually a bech32 address if wallet_multi is not None: # compare against addmultisigaddress msigw = wallet_multi.addmultisigaddress(nsigs, pub_keys, None, output_type) maddw = msigw["address"] mredeemw = msigw["redeemScript"] assert_equal(desc, drop_origins(msigw['descriptor'])) # addmultisigiaddress and createmultisig work the same assert maddw == madd assert mredeemw == mredeem spk = address_to_scriptpubkey(madd) value = decimal.Decimal("0.00004000") tx = self.wallet.send_to(from_node=self.nodes[0], scriptPubKey=spk, amount=int(value * COIN)) prevtxs = [{"txid": tx["txid"], "vout": tx["sent_vout"], "scriptPubKey": spk.hex(), "redeemScript": mredeem, "amount": value}] self.generate(node0, 1) outval = value - decimal.Decimal("0.00002000") # deduce fee (must be higher than the min relay fee) # send coins to node2 when wallet is enabled node2_balance = node2.getbalances()['mine']['trusted'] if self.is_wallet_compiled() else 0 out_addr = node2.getnewaddress() if self.is_wallet_compiled() else getnewdestination('bech32')[2] rawtx = node2.createrawtransaction([{"txid": tx["txid"], "vout": tx["sent_vout"]}], [{out_addr: outval}]) prevtx_err = dict(prevtxs[0]) del prevtx_err["redeemScript"] assert_raises_rpc_error(-8, "Missing redeemScript/witnessScript", node2.signrawtransactionwithkey, rawtx, priv_keys[0:nsigs-1], [prevtx_err]) # if witnessScript specified, all ok prevtx_err["witnessScript"] = prevtxs[0]["redeemScript"] node2.signrawtransactionwithkey(rawtx, priv_keys[0:nsigs-1], [prevtx_err]) # both specified, also ok prevtx_err["redeemScript"] = prevtxs[0]["redeemScript"] node2.signrawtransactionwithkey(rawtx, priv_keys[0:nsigs-1], [prevtx_err]) # redeemScript mismatch to witnessScript prevtx_err["redeemScript"] = "6a" # OP_RETURN assert_raises_rpc_error(-8, "redeemScript does not correspond to witnessScript", node2.signrawtransactionwithkey, rawtx, priv_keys[0:nsigs-1], [prevtx_err]) # redeemScript does not match scriptPubKey del prevtx_err["witnessScript"] assert_raises_rpc_error(-8, "redeemScript/witnessScript does not match scriptPubKey", node2.signrawtransactionwithkey, rawtx, priv_keys[0:nsigs-1], [prevtx_err]) # witnessScript does not match scriptPubKey prevtx_err["witnessScript"] = prevtx_err["redeemScript"] del prevtx_err["redeemScript"] assert_raises_rpc_error(-8, "redeemScript/witnessScript does not match scriptPubKey", node2.signrawtransactionwithkey, rawtx, priv_keys[0:nsigs-1], [prevtx_err]) rawtx2 = node2.signrawtransactionwithkey(rawtx, priv_keys[0:nsigs - 1], prevtxs) rawtx3 = node2.signrawtransactionwithkey(rawtx2["hex"], [priv_keys[-1]], prevtxs) assert rawtx3['complete'] tx = node0.sendrawtransaction(rawtx3["hex"], 0) blk = self.generate(node0, 1)[0] assert tx in node0.getblock(blk)["tx"] # When the wallet is enabled, assert node2 sees the incoming amount if self.is_wallet_compiled(): assert_equal(node2.getbalances()['mine']['trusted'], node2_balance + outval) txinfo = node0.getrawtransaction(tx, True, blk) self.log.info("n/m=%d/%d %s size=%d vsize=%d weight=%d" % (nsigs, nkeys, output_type, txinfo["size"], txinfo["vsize"], txinfo["weight"])) def test_mixing_uncompressed_and_compressed_keys(self, node, wallet_multi): self.log.info('Mixed compressed and uncompressed multisigs are not allowed') pk0, pk1, pk2 = [getnewdestination('bech32')[0].hex() for _ in range(3)] # decompress pk2 pk_obj = ECPubKey() pk_obj.set(bytes.fromhex(pk2)) pk_obj.compressed = False pk2 = pk_obj.get_bytes().hex() # Check all permutations of keys because order matters apparently for keys in itertools.permutations([pk0, pk1, pk2]): # Results should be the same as this legacy one legacy_addr = node.createmultisig(2, keys, 'legacy')['address'] if wallet_multi is not None: # 'addmultisigaddress' should return the same address result = wallet_multi.addmultisigaddress(2, keys, '', 'legacy') assert_equal(legacy_addr, result['address']) assert 'warnings' not in result # Generate addresses with the segwit types. These should all make legacy addresses err_msg = ["Unable to make chosen address type, please ensure no uncompressed public keys are present."] for addr_type in ['bech32', 'p2sh-segwit']: result = self.nodes[0].createmultisig(nrequired=2, keys=keys, address_type=addr_type) assert_equal(legacy_addr, result['address']) assert_equal(result['warnings'], err_msg) if wallet_multi is not None: result = wallet_multi.addmultisigaddress(nrequired=2, keys=keys, address_type=addr_type) assert_equal(legacy_addr, result['address']) assert_equal(result['warnings'], err_msg) def test_sortedmulti_descriptors_bip67(self): self.log.info('Testing sortedmulti descriptors with BIP 67 test vectors') with open(os.path.join(os.path.dirname(os.path.realpath(__file__)), 'data/rpc_bip67.json'), encoding='utf-8') as f: vectors = json.load(f) for t in vectors: key_str = ','.join(t['keys']) desc = descsum_create('sh(sortedmulti(2,{}))'.format(key_str)) assert_equal(self.nodes[0].deriveaddresses(desc)[0], t['address']) sorted_key_str = ','.join(t['sorted_keys']) sorted_key_desc = descsum_create('sh(multi(2,{}))'.format(sorted_key_str)) assert_equal(self.nodes[0].deriveaddresses(sorted_key_desc)[0], t['address']) if __name__ == '__main__': RpcCreateMultiSigTest().main()