Fix quoteAsset value in getAggregatePrice (#1449)

Fixes #1373

src/rpc/handlers/GetAggregatePrice.hpp

@@ -22,6 +22,7 @@
 #include "data/BackendInterface.hpp"
 #include "rpc/Errors.hpp"
 #include "rpc/JS.hpp"
+#include "rpc/common/MetaProcessors.hpp"
 #include "rpc/common/Modifiers.hpp"
 #include "rpc/common/Specs.hpp"
 #include "rpc/common/Types.hpp"
@@ -32,7 +33,6 @@
 #include <boost/json/conversion.hpp>
 #include <ripple/basics/Number.h>
 #include <ripple/protocol/AccountID.h>
-#include <ripple/protocol/ErrorCodes.h>
 #include <ripple/protocol/STAmount.h>
 #include <ripple/protocol/STObject.h>
 #include <ripple/protocol/jss.h>
@@ -45,6 +45,7 @@
 #include <string_view>
 #include <utility>
 #include <vector>
+
 namespace rpc {
 
 /**
@@ -162,11 +163,13 @@ public:
         static auto const rpcSpec = RpcSpec{
             {JS(ledger_hash), validation::Uint256HexStringValidator},
             {JS(ledger_index), validation::LedgerIndexValidator},
-            // note: Rippled's base_asset and quote_asset can be non-string. It will eventually return
-            // "rpcOBJECT_NOT_FOUND". Clio will return "rpcINVALID_PARAMS" if the base_asset or quote_asset is not a
-            // string. User can clearly know there is a mistake in the input.
+            // validate quoteAsset in accordance to the currency code found in XRPL doc:
+            // https://xrpl.org/docs/references/protocol/data-types/currency-formats#currency-codes
+            // usually Clio returns rpcMALFORMED_CURRENCY , return InvalidParam here just to mimic rippled
             {JS(base_asset), validation::Required{}, validation::Type<std::string>{}},
-            {JS(quote_asset), validation::Required{}, validation::Type<std::string>{}},
+            {JS(quote_asset),
+             validation::Required{},
+             meta::WithCustomError{validation::CurrencyValidator, Status(RippledError::rpcINVALID_PARAMS)}},
             {JS(oracles), validation::Required{}, oraclesValidator},
             // note: Unlike `rippled`, Clio only supports UInt as input, no string, no `null`, etc.
             {JS(time_threshold), validation::Type<std::uint32_t>{}},

tests/unit/rpc/handlers/GetAggregatePriceTests.cpp

@@ -159,6 +159,38 @@ generateTestValuesForParametersTest()
             "invalidParams",
             "Required field 'quote_asset' missing"
         },
+        GetAggregatePriceParamTestCaseBundle{
+            "invalid_quote_asset",
+            R"({
+                    "quote_asset" : "asdf",
+                    "base_asset": "USD",
+                    "oracles": 
+                    [
+                        {
+                            "account": "rGh1VZCRBJY6rJiaFpD4LZtyHiuCkC8aeD",
+                            "oracle_document_id": 2
+                        }
+                    ]
+                })",
+            "invalidParams",
+            "Invalid parameters."
+        },
+        GetAggregatePriceParamTestCaseBundle{
+            "invalid_quote_asset2",
+            R"({
+                    "quote_asset" : "+aa",
+                    "base_asset": "USD",
+                    "oracles": 
+                    [
+                        {
+                            "account": "rGh1VZCRBJY6rJiaFpD4LZtyHiuCkC8aeD",
+                            "oracle_document_id": 2
+                        }
+                    ]
+                })",
+            "invalidParams",
+            "Invalid parameters."
+        },
         GetAggregatePriceParamTestCaseBundle{
             "oraclesIsEmpty",
             R"({