Merge #16546: External signer support - Wallet Box edition

f75e0c1edde39a91cc353b0102638e232def9476 doc: add external-signer.md (Sjors Provoost)
d4b0107d68a91ed4d1a5c78c8ca76251329d3f3c rpc: send: support external signer (Sjors Provoost)
245b4457cf9265190a05529a0a97e1cb258cca8a rpc: signerdisplayaddress (Sjors Provoost)
7ebc7c0215979c53b92a436acc8b5b607b8d735a wallet: ExternalSigner: add GetDescriptors method (Sjors Provoost)
fc5da520f5c72287f59823b8a6d748dda49c574a wallet: add GetExternalSigner() (Sjors Provoost)
259f52cc33817a00b91ec9c7d078c07b88db7ab4 test: external_signer wallet flag is immutable (Sjors Provoost)
2655197e1c2dea9536c32afe1482ced4a1f481e9 rpc: add external_signer option to createwallet (Sjors Provoost)
2700f09c4130af6167ce71f46960e92ca800e205 rpc: signer: add enumeratesigners to list external signers (Sjors Provoost)
07b7c940a7da138d55a484ef83fee19ebf58a867 rpc: add external signer RPC files (Sjors Provoost)
8ce7767071779a0170364e6426bd393ed71bf281 wallet: add ExternalSignerScriptPubKeyMan (Sjors Provoost)
157ea7c614950d61bfe405310e2aaabcee31f7a3 wallet: add external_signer flag (Sjors Provoost)
f3e6ce78fba2b31173fe7b606aa9edb5b615bff3 test: add external signer test (Sjors Provoost)
8cf543f96dcd6fdfac1367b9e2b1d7d51be8bb76 wallet: add -signer argument for external signer command (Sjors Provoost)
f7eb7ecc6750ab267a979d9268ce5b5d151c26de test: framework: add skip_if_no_external_signer (Sjors Provoost)
87a97941f667483bbf2ab00929e03a2199cb8a62 configure: add --enable-external-signer (Sjors Provoost)

Pull request description:

  Big picture overview in [this gist](https://gist.github.com/Sjors/29d06728c685e6182828c1ce9b74483d).

  This PR lets `bitcoind` call an arbitrary command `-signer=<cmd>`, e.g. a hardware wallet driver,  where it can fetch public keys, ask to display an address, and sign a transaction (using PSBT under the hood).

  It's design to work with https://github.com/bitcoin-core/HWI, which supports multiple hardware wallets. Any command with the same arguments and return values will work. It simplifies the manual procedure described [here](https://github.com/bitcoin-core/HWI/blob/master/docs/bitcoin-core-usage.md).

  Usage is documented in [doc/external-signer.md](
  https://github.com/Sjors/bitcoin/blob/2019/08/hww-box2/doc/external-signer.md), which also describes what protocol a different signer binary should conform to.

  Use `--enable-external-signer` to opt in, requires Boost::Process:

  ```
  Options used to compile and link:
    with wallet     = yes
    with gui / qt   = no
    external signer = yes
  ```

  It adds the following RPC methods:
  * `enumeratesigners`: asks <cmd> for a list of signers (e.g. devices) and their master key fingerprint
  * `signerdisplayaddress <address>`:  asks <cmd> to display an address

  It enhances the following RPC methods:
  * `createwallet`: takes an additional `external_signer` argument and fetches keys from device
  * `send`: automatically sends transaction to device and waits

  Usage TL&DR:
  * clone HWI repo somewhere and launch `bitcoind -signer=../HWI/hwi.py`
  * check if you can see your hardware device: `bitcoin-cli enumeratesigners`
  * create wallet and auto import keys `bitcoin-cli createwallet "hww" true true "" true true true`
  * display address on device: `bitcoin-cli signerdisplayaddress ...`
  * to spend, use `send` RPC and approve transaction on device

  Prerequisites:
  - [x] #21127 load wallet flags before everything else
  - [x] #21182 remove mostly pointless BOOST_PROCESS macro

  Potentially useful followups:
  - GUI support: bitcoin-core/gui#4
  - bumpfee support
  - (automatically) verify (a subset of) keys on the device after import, through message signing

ACKs for top commit:
  laanwj:
    re-ACK f75e0c1edde39a91cc353b0102638e232def9476

Tree-SHA512: 7db8afd54762295c1424c3f01d8c587ec256a72f34bd5256e04b21832dabd5dc212be8ab975ae3b67de75259fd569a561491945750492f417111dc7b6641e77f

7 files changed, 336 insertions, 3 deletions

diff --git a/test/config.ini.in b/test/config.ini.in
index 77c9a720c3..e3872181cd 100644
--- a/test/config.ini.in
+++ b/test/config.ini.in
@@ -23,3 +23,4 @@ RPCAUTH=@abs_top_srcdir@/share/rpcauth/rpcauth.py
 @BUILD_BITCOIND_TRUE@ENABLE_BITCOIND=true
 @ENABLE_FUZZ_TRUE@ENABLE_FUZZ=true
 @ENABLE_ZMQ_TRUE@ENABLE_ZMQ=true
+@ENABLE_EXTERNAL_SIGNER_TRUE@ENABLE_EXTERNAL_SIGNER=true
diff --git a/test/functional/mocks/signer.py b/test/functional/mocks/signer.py
new file mode 100755
index 0000000000..676d0a0a4d
--- /dev/null
+++ b/test/functional/mocks/signer.py
@@ -0,0 +1,102 @@
+#!/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.
+
+import os
+import sys
+import argparse
+import json
+
+def perform_pre_checks():
+    mock_result_path = os.path.join(os.getcwd(), "mock_result")
+    if(os.path.isfile(mock_result_path)):
+        with open(mock_result_path, "r", encoding="utf8") as f:
+            mock_result = f.read()
+        if mock_result[0]:
+            sys.stdout.write(mock_result[2:])
+            sys.exit(int(mock_result[0]))
+
+def enumerate(args):
+  sys.stdout.write(json.dumps([{"fingerprint": "00000001", "type": "trezor", "model": "trezor_t"}, {"fingerprint": "00000002"}]))
+
+def getdescriptors(args):
+    xpub = "tpubD6NzVbkrYhZ4WaWSyoBvQwbpLkojyoTZPRsgXELWz3Popb3qkjcJyJUGLnL4qHHoQvao8ESaAstxYSnhyswJ76uZPStJRJCTKvosUCJZL5B"
+
+    sys.stdout.write(json.dumps({
+        "receive": [
+            "pkh([00000001/44'/1'/" + args.account + "']" + xpub + "/0/*)#vt6w3l3j",
+            "sh(wpkh([00000001/49'/1'/" + args.account + "']" + xpub + "/0/*))#r0grqw5x",
+            "wpkh([00000001/84'/1'/" + args.account + "']" + xpub + "/0/*)#x30uthjs"
+        ],
+        "internal": [
+            "pkh([00000001/44'/1'/" + args.account + "']" + xpub + "/1/*)#all0v2p2",
+            "sh(wpkh([00000001/49'/1'/" + args.account + "']" + xpub + "/1/*))#kwx4c3pe",
+            "wpkh([00000001/84'/1'/" + args.account + "']" + xpub + "/1/*)#h92akzzg"
+        ]
+    }))
+
+
+def displayaddress(args):
+    # Several descriptor formats are acceptable, so allowing for potential
+    # changes to InferDescriptor:
+    if args.fingerprint != "00000001":
+        return sys.stdout.write(json.dumps({"error": "Unexpected fingerprint", "fingerprint": args.fingerprint}))
+
+    expected_desc = [
+        "wpkh([00000001/84'/1'/0'/0/0]02c97dc3f4420402e01a113984311bf4a1b8de376cac0bdcfaf1b3ac81f13433c7)#0yneg42r"
+    ]
+    if args.desc not in expected_desc:
+        return sys.stdout.write(json.dumps({"error": "Unexpected descriptor", "desc": args.desc}))
+
+    return sys.stdout.write(json.dumps({"address": "bcrt1qm90ugl4d48jv8n6e5t9ln6t9zlpm5th68x4f8g"}))
+
+def signtx(args):
+    if args.fingerprint != "00000001":
+        return sys.stdout.write(json.dumps({"error": "Unexpected fingerprint", "fingerprint": args.fingerprint}))
+
+    with open(os.path.join(os.getcwd(), "mock_psbt"), "r", encoding="utf8") as f:
+        mock_psbt = f.read()
+
+    if args.fingerprint == "00000001" :
+        sys.stdout.write(json.dumps({
+            "psbt": mock_psbt,
+            "complete": True
+        }))
+    else:
+        sys.stdout.write(json.dumps({"psbt": args.psbt}))
+
+parser = argparse.ArgumentParser(prog='./signer.py', description='External signer mock')
+parser.add_argument('--fingerprint')
+parser.add_argument('--chain', default='main')
+parser.add_argument('--stdin', action='store_true')
+
+subparsers = parser.add_subparsers(description='Commands', dest='command')
+subparsers.required = True
+
+parser_enumerate = subparsers.add_parser('enumerate', help='list available signers')
+parser_enumerate.set_defaults(func=enumerate)
+
+parser_getdescriptors = subparsers.add_parser('getdescriptors')
+parser_getdescriptors.set_defaults(func=getdescriptors)
+parser_getdescriptors.add_argument('--account', metavar='account')
+
+parser_displayaddress = subparsers.add_parser('displayaddress', help='display address on signer')
+parser_displayaddress.add_argument('--desc', metavar='desc')
+parser_displayaddress.set_defaults(func=displayaddress)
+
+parser_signtx = subparsers.add_parser('signtx')
+parser_signtx.add_argument('psbt', metavar='psbt')
+
+parser_signtx.set_defaults(func=signtx)
+
+if not sys.stdin.isatty():
+    buffer = sys.stdin.read()
+    if buffer and buffer.rstrip() != "":
+       sys.argv.extend(buffer.rstrip().split(" "))
+
+args = parser.parse_args()
+
+perform_pre_checks()
+
+args.func(args)
diff --git a/test/functional/rpc_help.py b/test/functional/rpc_help.py
index 1eefd109f8..de21f43747 100755
--- a/test/functional/rpc_help.py
+++ b/test/functional/rpc_help.py
@@ -105,10 +105,13 @@ class HelpRpcTest(BitcoinTestFramework):
         if self.is_wallet_compiled():
             components.append('Wallet')
 
+        if self.is_external_signer_compiled():
+            components.append('Signer')
+
         if self.is_zmq_compiled():
             components.append('Zmq')
 
-        assert_equal(titles, components)
+        assert_equal(titles, sorted(components))
 
     def dump_help(self):
         dump_dir = os.path.join(self.options.tmpdir, 'rpc_help_dump')
diff --git a/test/functional/test_framework/test_framework.py b/test/functional/test_framework/test_framework.py
index 70a9798449..f7eaaa548f 100755
--- a/test/functional/test_framework/test_framework.py
+++ b/test/functional/test_framework/test_framework.py
@@ -827,10 +827,19 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
                     self.options.previous_releases_path))
         return self.options.prev_releases
 
+    def skip_if_no_external_signer(self):
+        """Skip the running test if external signer support has not been compiled."""
+        if not self.is_external_signer_compiled():
+            raise SkipTest("external signer support has not been compiled.")
+
     def is_cli_compiled(self):
         """Checks whether bitcoin-cli was compiled."""
         return self.config["components"].getboolean("ENABLE_CLI")
 
+    def is_external_signer_compiled(self):
+        """Checks whether external signer support was compiled."""
+        return self.config["components"].getboolean("ENABLE_EXTERNAL_SIGNER")
+
     def is_wallet_compiled(self):
         """Checks whether the wallet module was compiled."""
         return self.config["components"].getboolean("ENABLE_WALLET")
diff --git a/test/functional/test_framework/test_node.py b/test/functional/test_framework/test_node.py
index b820c36e6e..ce9c1bc024 100755
--- a/test/functional/test_framework/test_node.py
+++ b/test/functional/test_framework/test_node.py
@@ -678,10 +678,10 @@ class RPCOverloadWrapper():
     def __getattr__(self, name):
         return getattr(self.rpc, name)
 
-    def createwallet(self, wallet_name, disable_private_keys=None, blank=None, passphrase='', avoid_reuse=None, descriptors=None, load_on_startup=None):
+    def createwallet(self, wallet_name, disable_private_keys=None, blank=None, passphrase='', avoid_reuse=None, descriptors=None, load_on_startup=None, external_signer=None):
         if descriptors is None:
             descriptors = self.descriptors
-        return self.__getattr__('createwallet')(wallet_name, disable_private_keys, blank, passphrase, avoid_reuse, descriptors, load_on_startup)
+        return self.__getattr__('createwallet')(wallet_name, disable_private_keys, blank, passphrase, avoid_reuse, descriptors, load_on_startup, external_signer)
 
     def importprivkey(self, privkey, label=None, rescan=None):
         wallet_info = self.getwalletinfo()
diff --git a/test/functional/test_runner.py b/test/functional/test_runner.py
index d742ef4eee..79ad2cf161 100755
--- a/test/functional/test_runner.py
+++ b/test/functional/test_runner.py
@@ -111,6 +111,7 @@ BASE_SCRIPTS = [
     'wallet_listtransactions.py --legacy-wallet',
     'wallet_listtransactions.py --descriptors',
     'feature_taproot.py',
+    'wallet_signer.py --descriptors',
     # vv Tests less than 60s vv
     'p2p_sendheaders.py',
     'wallet_importmulti.py --legacy-wallet',
diff --git a/test/functional/wallet_signer.py b/test/functional/wallet_signer.py
new file mode 100755
index 0000000000..9dd080dca9
--- /dev/null
+++ b/test/functional/wallet_signer.py
@@ -0,0 +1,217 @@
+#!/usr/bin/env python3
+# Copyright (c) 2017-2018 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test external signer.
+
+Verify that a bitcoind node can use an external signer command
+"""
+import os
+import platform
+
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import (
+    assert_equal,
+    assert_raises_rpc_error,
+)
+
+
+class SignerTest(BitcoinTestFramework):
+    def mock_signer_path(self):
+        path = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'mocks', 'signer.py')
+        if platform.system() == "Windows":
+            return "py " + path
+        else:
+            return path
+
+    def set_test_params(self):
+        self.num_nodes = 4
+
+        self.extra_args = [
+            [],
+            [f"-signer={self.mock_signer_path()}", '-keypool=10'],
+            [f"-signer={self.mock_signer_path()}", '-keypool=10'],
+            ["-signer=fake.py"],
+        ]
+
+    def skip_test_if_missing_module(self):
+        self.skip_if_no_wallet()
+        self.skip_if_no_external_signer()
+
+    def set_mock_result(self, node, res):
+        with open(os.path.join(node.cwd, "mock_result"), "w", encoding="utf8") as f:
+            f.write(res)
+
+    def clear_mock_result(self, node):
+        os.remove(os.path.join(node.cwd, "mock_result"))
+
+    def run_test(self):
+        self.log.debug(f"-signer={self.mock_signer_path()}")
+
+        assert_raises_rpc_error(-4, 'Error: restart bitcoind with -signer=<cmd>',
+            self.nodes[0].enumeratesigners
+        )
+
+        # Handle script missing:
+        assert_raises_rpc_error(-1, 'execve failed: No such file or directory',
+            self.nodes[3].enumeratesigners
+        )
+
+        # Handle error thrown by script
+        self.set_mock_result(self.nodes[1], "2")
+        assert_raises_rpc_error(-1, 'RunCommandParseJSON error',
+            self.nodes[1].enumeratesigners
+        )
+        self.clear_mock_result(self.nodes[1])
+
+        self.set_mock_result(self.nodes[1], '0 [{"type": "trezor", "model": "trezor_t", "error": "fingerprint not found"}]')
+        assert_raises_rpc_error(-4, 'fingerprint not found',
+            self.nodes[1].enumeratesigners
+        )
+        self.clear_mock_result(self.nodes[1])
+
+        # Create new wallets for an external signer.
+        # disable_private_keys and descriptors must be true:
+        assert_raises_rpc_error(-4, "Private keys must be disabled when using an external signer", self.nodes[1].createwallet, wallet_name='not_hww', disable_private_keys=False, descriptors=True, external_signer=True)
+        if self.is_bdb_compiled():
+            assert_raises_rpc_error(-4, "Descriptor support must be enabled when using an external signer", self.nodes[1].createwallet, wallet_name='not_hww', disable_private_keys=True, descriptors=False, external_signer=True)
+        else:
+            assert_raises_rpc_error(-4, "Compiled without bdb support (required for legacy wallets)", self.nodes[1].createwallet, wallet_name='not_hww', disable_private_keys=True, descriptors=False, external_signer=True)
+
+        self.nodes[1].createwallet(wallet_name='hww', disable_private_keys=True, descriptors=True, external_signer=True)
+        hww = self.nodes[1].get_wallet_rpc('hww')
+
+        result = hww.enumeratesigners()
+        assert_equal(len(result['signers']), 2)
+        assert_equal(result['signers'][0]["fingerprint"], "00000001")
+        assert_equal(result['signers'][0]["name"], "trezor_t")
+
+        # Flag can't be set afterwards (could be added later for non-blank descriptor based watch-only wallets)
+        self.nodes[1].createwallet(wallet_name='not_hww', disable_private_keys=True, descriptors=True, external_signer=False)
+        not_hww = self.nodes[1].get_wallet_rpc('not_hww')
+        assert_raises_rpc_error(-8, "Wallet flag is immutable: external_signer", not_hww.setwalletflag, "external_signer", True)
+
+        # assert_raises_rpc_error(-4, "Multiple signers found, please specify which to use", wallet_name='not_hww', disable_private_keys=True, descriptors=True, external_signer=True)
+
+        # TODO: Handle error thrown by script
+        # self.set_mock_result(self.nodes[1], "2")
+        # assert_raises_rpc_error(-1, 'Unable to parse JSON',
+        #     self.nodes[1].createwallet, wallet_name='not_hww2', disable_private_keys=True, descriptors=True, external_signer=False
+        # )
+        # self.clear_mock_result(self.nodes[1])
+
+        assert_equal(hww.getwalletinfo()["keypoolsize"], 30)
+
+        address1 = hww.getnewaddress(address_type="bech32")
+        assert_equal(address1, "bcrt1qm90ugl4d48jv8n6e5t9ln6t9zlpm5th68x4f8g")
+        address_info = hww.getaddressinfo(address1)
+        assert_equal(address_info['solvable'], True)
+        assert_equal(address_info['ismine'], True)
+        assert_equal(address_info['hdkeypath'], "m/84'/1'/0'/0/0")
+
+        address2 = hww.getnewaddress(address_type="p2sh-segwit")
+        assert_equal(address2, "2N2gQKzjUe47gM8p1JZxaAkTcoHPXV6YyVp")
+        address_info = hww.getaddressinfo(address2)
+        assert_equal(address_info['solvable'], True)
+        assert_equal(address_info['ismine'], True)
+        assert_equal(address_info['hdkeypath'], "m/49'/1'/0'/0/0")
+
+        address3 = hww.getnewaddress(address_type="legacy")
+        assert_equal(address3, "n1LKejAadN6hg2FrBXoU1KrwX4uK16mco9")
+        address_info = hww.getaddressinfo(address3)
+        assert_equal(address_info['solvable'], True)
+        assert_equal(address_info['ismine'], True)
+        assert_equal(address_info['hdkeypath'], "m/44'/1'/0'/0/0")
+
+        self.log.info('Test signerdisplayaddress')
+        result = hww.signerdisplayaddress(address1)
+        assert_equal(result, {"address": address1})
+
+        # Handle error thrown by script
+        self.set_mock_result(self.nodes[1], "2")
+        assert_raises_rpc_error(-1, 'RunCommandParseJSON error',
+            hww.signerdisplayaddress, address1
+        )
+        self.clear_mock_result(self.nodes[1])
+
+        self.log.info('Prepare mock PSBT')
+        self.nodes[0].sendtoaddress(address1, 1)
+        self.nodes[0].generate(1)
+        self.sync_all()
+
+        # Load private key into wallet to generate a signed PSBT for the mock
+        self.nodes[1].createwallet(wallet_name="mock", disable_private_keys=False, blank=True, descriptors=True)
+        mock_wallet = self.nodes[1].get_wallet_rpc("mock")
+        assert mock_wallet.getwalletinfo()['private_keys_enabled']
+
+        result = mock_wallet.importdescriptors([{
+            "desc": "wpkh([00000001/84'/1'/0']tprv8ZgxMBicQKsPd7Uf69XL1XwhmjHopUGep8GuEiJDZmbQz6o58LninorQAfcKZWARbtRtfnLcJ5MQ2AtHcQJCCRUcMRvmDUjyEmNUWwx8UbK/0/*)#rweraev0",
+            "timestamp": 0,
+            "range": [0,1],
+            "internal": False,
+            "active": True
+        },
+        {
+            "desc": "wpkh([00000001/84'/1'/0']tprv8ZgxMBicQKsPd7Uf69XL1XwhmjHopUGep8GuEiJDZmbQz6o58LninorQAfcKZWARbtRtfnLcJ5MQ2AtHcQJCCRUcMRvmDUjyEmNUWwx8UbK/1/*)#j6uzqvuh",
+            "timestamp": 0,
+            "range": [0, 0],
+            "internal": True,
+            "active": True
+        }])
+        assert_equal(result[0], {'success': True})
+        assert_equal(result[1], {'success': True})
+        assert_equal(mock_wallet.getwalletinfo()["txcount"], 1)
+        dest = self.nodes[0].getnewaddress(address_type='bech32')
+        mock_psbt = mock_wallet.walletcreatefundedpsbt([], {dest:0.5}, 0, {}, True)['psbt']
+        mock_psbt_signed = mock_wallet.walletprocesspsbt(psbt=mock_psbt, sign=True, sighashtype="ALL", bip32derivs=True)
+        mock_psbt_final = mock_wallet.finalizepsbt(mock_psbt_signed["psbt"])
+        mock_tx = mock_psbt_final["hex"]
+        assert(mock_wallet.testmempoolaccept([mock_tx])[0]["allowed"])
+
+        # # Create a new wallet and populate with specific public keys, in order
+        # # to work with the mock signed PSBT.
+        # self.nodes[1].createwallet(wallet_name="hww4", disable_private_keys=True, descriptors=True, external_signer=True)
+        # hww4 = self.nodes[1].get_wallet_rpc("hww4")
+        #
+        # descriptors = [{
+        #     "desc": "wpkh([00000001/84'/1'/0']tpubD6NzVbkrYhZ4WaWSyoBvQwbpLkojyoTZPRsgXELWz3Popb3qkjcJyJUGLnL4qHHoQvao8ESaAstxYSnhyswJ76uZPStJRJCTKvosUCJZL5B/0/*)#x30uthjs",
+        #     "timestamp": "now",
+        #     "range": [0, 1],
+        #     "internal": False,
+        #     "watchonly": True,
+        #     "active": True
+        # },
+        # {
+        #     "desc": "wpkh([00000001/84'/1'/0']tpubD6NzVbkrYhZ4WaWSyoBvQwbpLkojyoTZPRsgXELWz3Popb3qkjcJyJUGLnL4qHHoQvao8ESaAstxYSnhyswJ76uZPStJRJCTKvosUCJZL5B/1/*)#h92akzzg",
+        #     "timestamp": "now",
+        #     "range": [0, 0],
+        #     "internal": True,
+        #     "watchonly": True,
+        #     "active": True
+        # }]
+
+        # result = hww4.importdescriptors(descriptors)
+        # assert_equal(result[0], {'success': True})
+        # assert_equal(result[1], {'success': True})
+        assert_equal(hww.getwalletinfo()["txcount"], 1)
+
+        assert(hww.testmempoolaccept([mock_tx])[0]["allowed"])
+
+        with open(os.path.join(self.nodes[1].cwd, "mock_psbt"), "w", encoding="utf8") as f:
+            f.write(mock_psbt_signed["psbt"])
+
+        self.log.info('Test send using hww1')
+
+        res = hww.send(outputs={dest:0.5},options={"add_to_wallet": False})
+        assert(res["complete"])
+        assert_equal(res["hex"], mock_tx)
+
+        # # Handle error thrown by script
+        # self.set_mock_result(self.nodes[4], "2")
+        # assert_raises_rpc_error(-1, 'Unable to parse JSON',
+        #     hww4.signerprocesspsbt, psbt_orig, "00000001"
+        # )
+        # self.clear_mock_result(self.nodes[4])
+
+if __name__ == '__main__':
+    SignerTest().main()