transform skip errors into same format as squid err res for now

src/commonMain/kotlin/exchange.dydx.abacus/output/input/TransferInput.kt

@@ -562,7 +562,6 @@ data class TransferInput(
 
                 val errors = parser.asString(route?.get("errors"))
                 val errorMessage: String? =
-//                prefer route?.get("errorMessage") and default to this
                     if (errors != null) {
                         val errorArray = parser.decodeJsonArray(errors)
                         val firstError = parser.asMap(errorArray?.first())

src/commonMain/kotlin/exchange.dydx.abacus/processor/router/skip/SkipRouteProcessor.kt

@@ -11,9 +11,6 @@ internal class SkipRouteProcessor(internal val parser: ParserProtocol) {
             "route.usd_amount_out" to "toAmountUSD",
             "route.estimated_amount_out" to "toAmount",
             "swap_price_impact_percent" to "aggregatePriceImpact",
-//            [Q] we probably need to handle this separately. should return a 4XX error
-//            "errors" to "errors",
-            "message" to "errorMessage",
 
 //            SQUID PARAMS THAT ARE NOW DEPRECATED:
 //            "route.estimate.gasCosts.0.amountUSD" to "gasFee",
@@ -65,11 +62,19 @@ internal class SkipRouteProcessor(internal val parser: ParserProtocol) {
 
         val payloadProcessor = SkipRoutePayloadProcessor(parser)
 //        TODO: Remove slippage.
-//        This is just hard coded in our params so we're keeping it to be
-//        at parity for now. Fast follow squid -> skip migration project to removing max slippage
-//        because we already show the actual slippage.
+//        This is just hard coded in our params so we're keeping it to be at parity for now
+//        Fast follow squid -> skip migration project to removing max slippage
+//        because we already show the actual price impact.
         modified.safeSet("slippage", "1")
         modified.safeSet("requestPayload", payloadProcessor.received(null, payload))
+
+        val errorCode = parser.value(payload, "code")
+//        if we have an error code, add the payload as a list of errors
+//        this allows to match the current errors format.
+//        TODO: replace errors with errorMessage once we finish migration
+        if (errorCode != null) {
+            modified.safeSet("errors", parser.asString(listOf(payload)))
+        }
         return modified
     }
 }

src/commonTest/kotlin/exchange.dydx.abacus/processor/router/skip/SkipRouteProcessorTests.kt

@@ -34,4 +34,16 @@ class SkipRouteProcessorTests {
         )
         assertEquals(expected.toString(), result.toString())
     }
+
+    @Test
+    fun testReceivedError() {
+        val payload = skipRouteMock.payload_error
+        val result = skipRouteProcessor.received(existing = mapOf(), payload = templateToJson(payload), decimals = 6.0)
+        val expected = mapOf(
+            "slippage" to "1",
+            "requestPayload" to emptyMap<String, Any>(),
+            "errors" to "[{code=3, message=\"difference in usd value of route input and output is too large. input usd value: 100000.00 output usd value: 98811.81\", details=[{\"@type\":\"type.googleapis.com/google.rpc.ErrorInfo\",\"reason\":\"BAD_PRICE_ERROR\",\"domain\":\"skip.money\",\"metadata\":{}}]}]",
+        )
+        assertEquals(expected.toString(), result.toString())
+    }
 }

src/commonTest/kotlin/exchange.dydx.abacus/tests/payloads/SkipRouteMock.kt

@@ -106,5 +106,18 @@ internal class SkipRouteMock {
             "noble-1"
         ]
     }
+}"""
+    internal val payload_error = """
+    {
+  "code": 3,
+  "message": "difference in usd value of route input and output is too large. input usd value: 100000.00 output usd value: 98811.81",
+  "details": [
+    {
+      "@type": "type.googleapis.com/google.rpc.ErrorInfo",
+      "reason": "BAD_PRICE_ERROR",
+      "domain": "skip.money",
+      "metadata": {}
+    }
+  ]
 }"""
 }