fix: Remove InvalidHotWallet Error from gateway_balances RPC handler (#1830)

Fixes #1825 by removing the check in the gateway_balances RPC handler
that returns the RpcInvalidHotWallet error code if one of the addresses
supplied in the request's `hotwallet` array does not have a trustline
with the `account` from the request.

As stated in the original ticket, this change fixes a discrepancy in
behavior between Clio and rippled, as rippled does not check for
trustline existence when handling gateway_balances RPCs

Co-authored-by: Sergey Kuznetsov <skuznetsov@ripple.com>

src/rpc/Errors.cpp

@@ -79,7 +79,6 @@ getErrorInfo(ClioError code)
         {.code = ClioError::RpcMalformedRequest, .error = "malformedRequest", .message = "Malformed request."},
         {.code = ClioError::RpcMalformedOwner, .error = "malformedOwner", .message = "Malformed owner."},
         {.code = ClioError::RpcMalformedAddress, .error = "malformedAddress", .message = "Malformed address."},
-        {.code = ClioError::RpcInvalidHotWallet, .error = "invalidHotWallet", .message = "Invalid hot wallet."},
         {.code = ClioError::RpcUnknownOption, .error = "unknownOption", .message = "Unknown option."},
         {.code = ClioError::RpcFieldNotFoundTransaction,
          .error = "fieldNotFoundTransaction",

src/rpc/Errors.hpp

@@ -39,7 +39,6 @@ enum class ClioError {
     RpcMalformedRequest = 5001,
     RpcMalformedOwner = 5002,
     RpcMalformedAddress = 5003,
-    RpcInvalidHotWallet = 5004,
     RpcUnknownOption = 5005,
     RpcFieldNotFoundTransaction = 5006,
     RpcMalformedOracleDocumentId = 5007,

src/rpc/handlers/GatewayBalances.cpp

@@ -145,10 +145,6 @@ GatewayBalancesHandler::process(GatewayBalancesHandler::Input input, Context con
     if (auto status = std::get_if<Status>(&ret))
         return Error{*status};
 
-    auto inHotbalances = [&](auto const& hw) { return output.hotBalances.contains(hw); };
-    if (not std::ranges::all_of(input.hotWallets, inHotbalances))
-        return Error{Status{ClioError::RpcInvalidHotWallet}};
-
     output.accountID = input.account;
     output.ledgerHash = ripple::strHex(lgrInfo.hash);
     output.ledgerIndex = lgrInfo.seq;

src/web/impl/ErrorHandling.hpp

@@ -88,7 +88,6 @@ public:
                     case rpc::ClioError::RpcMalformedRequest:
                     case rpc::ClioError::RpcMalformedOwner:
                     case rpc::ClioError::RpcMalformedAddress:
-                    case rpc::ClioError::RpcInvalidHotWallet:
                     case rpc::ClioError::RpcFieldNotFoundTransaction:
                     case rpc::ClioError::RpcMalformedOracleDocumentId:
                     case rpc::ClioError::RpcMalformedAuthorizedCredentials:

src/web/ng/impl/ErrorHandling.cpp

@@ -102,7 +102,6 @@ ErrorHelper::makeError(rpc::Status const& err) const
             case rpc::ClioError::RpcMalformedRequest:
             case rpc::ClioError::RpcMalformedOwner:
             case rpc::ClioError::RpcMalformedAddress:
-            case rpc::ClioError::RpcInvalidHotWallet:
             case rpc::ClioError::RpcFieldNotFoundTransaction:
             case rpc::ClioError::RpcMalformedOracleDocumentId:
             case rpc::ClioError::RpcMalformedAuthorizedCredentials:

tests/unit/rpc/handlers/GatewayBalancesTests.cpp

@@ -327,53 +327,6 @@ TEST_F(RPCGatewayBalancesHandlerTest, AccountNotFound)
     });
 }
 
-TEST_F(RPCGatewayBalancesHandlerTest, InvalidHotWallet)
-{
-    auto const seq = 300;
-
-    EXPECT_CALL(*backend_, fetchLedgerBySequence).Times(1);
-    // return valid ledgerHeader
-    auto const ledgerHeader = createLedgerHeader(kLEDGER_HASH, seq);
-    ON_CALL(*backend_, fetchLedgerBySequence(seq, _)).WillByDefault(Return(ledgerHeader));
-
-    // return valid account
-    auto const accountKk = ripple::keylet::account(getAccountIdWithString(kACCOUNT)).key;
-    ON_CALL(*backend_, doFetchLedgerObject(accountKk, seq, _)).WillByDefault(Return(Blob{'f', 'a', 'k', 'e'}));
-
-    // return valid owner dir
-    auto const ownerDir = createOwnerDirLedgerObject({ripple::uint256{kINDEX2}}, kINDEX1);
-    auto const ownerDirKk = ripple::keylet::ownerDir(getAccountIdWithString(kACCOUNT)).key;
-    ON_CALL(*backend_, doFetchLedgerObject(ownerDirKk, seq, _))
-        .WillByDefault(Return(ownerDir.getSerializer().peekData()));
-    EXPECT_CALL(*backend_, doFetchLedgerObject).Times(2);
-
-    // create a valid line, balance is 0
-    auto const line1 = createRippleStateLedgerObject("USD", kISSUER, 0, kACCOUNT, 10, kACCOUNT2, 20, kTXN_ID, 123);
-    std::vector<Blob> bbs;
-    bbs.push_back(line1.getSerializer().peekData());
-    ON_CALL(*backend_, doFetchLedgerObjects).WillByDefault(Return(bbs));
-    EXPECT_CALL(*backend_, doFetchLedgerObjects).Times(1);
-
-    auto const handler = AnyHandler{GatewayBalancesHandler{backend_}};
-    runSpawn([&](auto yield) {
-        auto const output = handler.process(
-            json::parse(fmt::format(
-                R"({{
-                    "account": "{}",
-                    "hotwallet": "{}"
-                }})",
-                kACCOUNT,
-                kACCOUNT2
-            )),
-            Context{yield}
-        );
-        ASSERT_FALSE(output);
-        auto const err = rpc::makeError(output.result.error());
-        EXPECT_EQ(err.at("error").as_string(), "invalidHotWallet");
-        EXPECT_EQ(err.at("error_message").as_string(), "Invalid hot wallet.");
-    });
-}
-
 struct NormalTestBundle {
     std::string testName;
     ripple::STObject mockedDir;