Backport invalid address tests

Reduced version of the test from master/bitcoin#20861 by John Newbery.

Github-Pull: bitcoin#20861
Rebased-From: fe5e495

test/functional/rpc_invalid_address_message.py

@@ -0,0 +1,84 @@
+#!/usr/bin/env python3
+# Copyright (c) 2020 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 error messages for 'getaddressinfo' and 'validateaddress' RPC commands."""
+
+from test_framework.test_framework import BitcoinTestFramework
+
+from test_framework.util import assert_raises_rpc_error
+
+BECH32_VALID = 'bcrt1qtmp74ayg7p24uslctssvjm06q5phz4yrxucgnv'
+BECH32_INVALID_BECH32 = 'bcrt1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vqdmchcc'
+BECH32_INVALID_BECH32M = 'bcrt1qw508d6qejxtdg4y5r3zarvary0c5xw7k35mrzd'
+BECH32_INVALID_VERSION = 'bcrt130xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vqynjegk'
+BECH32_INVALID_SIZE = 'bcrt1s0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7v8n0nx0muaewav25430mtr'
+BECH32_INVALID_V0_SIZE = 'bcrt1qw508d6qejxtdg4y5r3zarvary0c5xw7kqqq5k3my'
+BECH32_INVALID_PREFIX = 'bc1pw508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7k7grplx'
+
+BASE58_VALID = 'mipcBbFg9gMiCh81Kj8tqqdgoZub1ZJRfn'
+BASE58_INVALID_PREFIX = '17VZNX1SN5NtKa8UQFxwQbFeFc3iqRYhem'
+
+INVALID_ADDRESS = 'asfah14i8fajz0123f'
+
+class InvalidAddressErrorMessageTest(BitcoinTestFramework):
+    def set_test_params(self):
+        self.setup_clean_chain = True
+        self.num_nodes = 1
+
+    def skip_test_if_missing_module(self):
+        self.skip_if_no_wallet()
+
+    def test_validateaddress(self):
+        node = self.nodes[0]
+
+        # Bech32
+        info = node.validateaddress(BECH32_INVALID_SIZE)
+        assert not info['isvalid']
+
+        info = node.validateaddress(BECH32_INVALID_PREFIX)
+        assert not info['isvalid']
+
+        info = node.validateaddress(BECH32_INVALID_BECH32)
+        assert not info['isvalid']
+
+        info = node.validateaddress(BECH32_INVALID_BECH32M)
+        assert not info['isvalid']
+
+        info = node.validateaddress(BECH32_INVALID_V0_SIZE)
+        assert not info['isvalid']
+
+        info = node.validateaddress(BECH32_VALID)
+        assert info['isvalid']
+        assert 'error' not in info
+
+        # Base58
+        info = node.validateaddress(BASE58_INVALID_PREFIX)
+        assert not info['isvalid']
+
+        info = node.validateaddress(BASE58_VALID)
+        assert info['isvalid']
+        assert 'error' not in info
+
+        # Invalid address format
+        info = node.validateaddress(INVALID_ADDRESS)
+        assert not info['isvalid']
+
+    def test_getaddressinfo(self):
+        node = self.nodes[0]
+
+        assert_raises_rpc_error(-5, "Invalid address", node.getaddressinfo, BECH32_INVALID_SIZE)
+
+        assert_raises_rpc_error(-5, "Invalid address", node.getaddressinfo, BECH32_INVALID_PREFIX)
+
+        assert_raises_rpc_error(-5, "Invalid address", node.getaddressinfo, BASE58_INVALID_PREFIX)
+
+        assert_raises_rpc_error(-5, "Invalid address", node.getaddressinfo, INVALID_ADDRESS)
+
+    def run_test(self):
+        self.test_validateaddress()
+        self.test_getaddressinfo()
+
+
+if __name__ == '__main__':
+    InvalidAddressErrorMessageTest().main()

test/functional/test_runner.py

@@ -281,6 +281,7 @@
     'rpc_getdescriptorinfo.py',
     'rpc_getpeerinfo_deprecation.py',
     'rpc_help.py',
+    'rpc_invalid_address_message.py',
     'feature_help.py',
     'feature_shutdown.py',
     'p2p_ibd_txrelay.py',