Merge bitcoin#26514: Improve address decoding errors

962a093 Improve address decoding errors (Aurèle Oulès)

Pull request description:

  Attempt to fix bitcoin#21741.

ACKs for top commit:
  MarcoFalke:
    lgtm ACK 962a093
  davidgumberg:
    ACK bitcoin@962a093
  1440000bytes:
    utACK bitcoin@962a093

Tree-SHA512: 6f216eeaeccf6bfdf0730d38835fdf26c935a5e1fc35006660393a9ad76bf38c85340f0f20e92f87840463d83d891d9714cfad313aab301a16bb8efa4490df06

Author: glozow

src/key_io.cpp

@@ -107,17 +107,17 @@ CTxDestination DecodeDestination(const std::string& str, const CChainParams& par
                 std::equal(script_prefix.begin(), script_prefix.end(), data.begin())) ||
             (data.size() >= pubkey_prefix.size() &&
                 std::equal(pubkey_prefix.begin(), pubkey_prefix.end(), data.begin()))) {
-            error_str = "Invalid length for Base58 address";
+            error_str = "Invalid length for Base58 address (P2PKH or P2SH)";
         } else {
-            error_str = "Invalid prefix for Base58-encoded address";
+            error_str = "Invalid or unsupported Base58-encoded address.";
         }
         return CNoDestination();
     } else if (!is_bech32) {
         // Try Base58 decoding without the checksum, using a much larger max length
         if (!DecodeBase58(str, data, 100)) {
-            error_str = "Not a valid Bech32 or Base58 encoding";
+            error_str = "Invalid or unsupported Segwit (Bech32) or Base58 encoding.";
         } else {
-            error_str = "Invalid checksum or length of Base58 address";
+            error_str = "Invalid checksum or length of Base58 address (P2PKH or P2SH)";
         }
         return CNoDestination();
     }
@@ -127,7 +127,7 @@ CTxDestination DecodeDestination(const std::string& str, const CChainParams& par
     if ((dec.encoding == bech32::Encoding::BECH32 || dec.encoding == bech32::Encoding::BECH32M) && dec.data.size() > 0) {
         // Bech32 decoding
         if (dec.hrp != params.Bech32HRP()) {
-            error_str = "Invalid prefix for Bech32 address";
+            error_str = strprintf("Invalid or unsupported prefix for Segwit (Bech32) address (expected %s, got %s).", params.Bech32HRP(), dec.hrp);
             return CNoDestination();
         }
         int version = dec.data[0]; // The first 5 bit symbol is the witness version (0-16)

test/functional/rpc_invalid_address_message.py

@@ -64,7 +64,7 @@ def check_invalid(self, addr, error_str, error_locations=None):
     def test_validateaddress(self):
         # Invalid Bech32
         self.check_invalid(BECH32_INVALID_SIZE, 'Invalid Bech32 address data size')
-        self.check_invalid(BECH32_INVALID_PREFIX, 'Not a valid Bech32 or Base58 encoding')
+        self.check_invalid(BECH32_INVALID_PREFIX, 'Invalid or unsupported Segwit (Bech32) or Base58 encoding.')
         self.check_invalid(BECH32_INVALID_BECH32, 'Version 1+ witness address must use Bech32m checksum')
         self.check_invalid(BECH32_INVALID_BECH32M, 'Version 0 witness address must use Bech32 checksum')
         self.check_invalid(BECH32_INVALID_VERSION, 'Invalid Bech32 address witness version')
@@ -84,16 +84,16 @@ def test_validateaddress(self):
         self.check_valid(BECH32_VALID_MULTISIG)
 
         # Invalid Base58
-        self.check_invalid(BASE58_INVALID_PREFIX, 'Invalid prefix for Base58-encoded address')
-        self.check_invalid(BASE58_INVALID_CHECKSUM, 'Invalid checksum or length of Base58 address')
-        self.check_invalid(BASE58_INVALID_LENGTH, 'Invalid checksum or length of Base58 address')
+        self.check_invalid(BASE58_INVALID_PREFIX, 'Invalid or unsupported Base58-encoded address.')
+        self.check_invalid(BASE58_INVALID_CHECKSUM, 'Invalid checksum or length of Base58 address (P2PKH or P2SH)')
+        self.check_invalid(BASE58_INVALID_LENGTH, 'Invalid checksum or length of Base58 address (P2PKH or P2SH)')
 
         # Valid Base58
         self.check_valid(BASE58_VALID)
 
         # Invalid address format
-        self.check_invalid(INVALID_ADDRESS, 'Not a valid Bech32 or Base58 encoding')
-        self.check_invalid(INVALID_ADDRESS_2, 'Not a valid Bech32 or Base58 encoding')
+        self.check_invalid(INVALID_ADDRESS, 'Invalid or unsupported Segwit (Bech32) or Base58 encoding.')
+        self.check_invalid(INVALID_ADDRESS_2, 'Invalid or unsupported Segwit (Bech32) or Base58 encoding.')
 
         node = self.nodes[0]
 
@@ -106,9 +106,9 @@ def test_getaddressinfo(self):
         node = self.nodes[0]
 
         assert_raises_rpc_error(-5, "Invalid Bech32 address data size", node.getaddressinfo, BECH32_INVALID_SIZE)
-        assert_raises_rpc_error(-5, "Not a valid Bech32 or Base58 encoding", node.getaddressinfo, BECH32_INVALID_PREFIX)
-        assert_raises_rpc_error(-5, "Invalid prefix for Base58-encoded address", node.getaddressinfo, BASE58_INVALID_PREFIX)
-        assert_raises_rpc_error(-5, "Not a valid Bech32 or Base58 encoding", node.getaddressinfo, INVALID_ADDRESS)
+        assert_raises_rpc_error(-5, "Invalid or unsupported Segwit (Bech32) or Base58 encoding.", node.getaddressinfo, BECH32_INVALID_PREFIX)
+        assert_raises_rpc_error(-5, "Invalid or unsupported Base58-encoded address.", node.getaddressinfo, BASE58_INVALID_PREFIX)
+        assert_raises_rpc_error(-5, "Invalid or unsupported Segwit (Bech32) or Base58 encoding.", node.getaddressinfo, INVALID_ADDRESS)
 
     def run_test(self):
         self.test_validateaddress()

test/functional/wallet_basic.py

@@ -632,7 +632,7 @@ def run_test(self):
         assert_equal(total_txs, len(self.nodes[0].listtransactions("*", 99999)))
 
         # Test getaddressinfo on external address. Note that these addresses are taken from disablewallet.py
-        assert_raises_rpc_error(-5, "Invalid prefix for Base58-encoded address", self.nodes[0].getaddressinfo, "3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy")
+        assert_raises_rpc_error(-5, "Invalid or unsupported Base58-encoded address.", self.nodes[0].getaddressinfo, "3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy")
         address_info = self.nodes[0].getaddressinfo("mneYUmWYsuk7kySiURxCi3AGxrAqZxLgPZ")
         assert_equal(address_info['address'], "mneYUmWYsuk7kySiURxCi3AGxrAqZxLgPZ")
         assert_equal(address_info["scriptPubKey"], "76a9144e3854046c7bd1594ac904e4793b6a45b36dea0988ac")