problem: no response on invalid request to proxy

rel: #43

testing/dshackle/dshackle.yaml

@@ -8,6 +8,9 @@ cluster:
   upstreams:
     - id: test-1
       chain: ethereum
+      methods:
+        enabled:
+          - name: debug_traceTransaction
       options:
         disable-validation: true
       connection:

testing/simple-upstream/src/main/groovy/testing/BlocksHandler.groovy

@@ -5,9 +5,11 @@ import com.fasterxml.jackson.databind.ObjectMapper
 class BlocksHandler implements CallHandler {
 
     ObjectMapper objectMapper
+    ResourceResponse resourceResponse
 
     BlocksHandler(ObjectMapper objectMapper) {
         this.objectMapper = objectMapper
+        this.resourceResponse = new ResourceResponse(objectMapper)
     }
 
     @Override
@@ -18,22 +20,13 @@ class BlocksHandler implements CallHandler {
         if (method == "eth_getBlockByNumber") {
             String blockId = params[0]
             println("get block $blockId")
-            def result = getResource("block-${blockId}.json")
-            return Result.ok(result)
+            return resourceResponse.respondWith("block-${blockId}.json")
         }
         if (method == "eth_getTransactionByHash") {
             String txId = params[0]
-            def result = getResource("tx-${txId}.json")
-            return Result.ok(result)
+            return resourceResponse.respondWith("tx-${txId}.json")
         }
         return null
     }
 
-    Object getResource(String name) {
-        String json = BlocksHandler.class.getResourceAsStream("/" + name)?.text
-        if (json == null) {
-            return null
-        }
-        return objectMapper.readValue(json, Map)
-    }
 }

testing/simple-upstream/src/main/groovy/testing/ResourceResponse.groovy

@@ -0,0 +1,25 @@
+package testing
+
+import com.fasterxml.jackson.databind.ObjectMapper
+
+class ResourceResponse {
+
+    ObjectMapper objectMapper
+
+    ResourceResponse(ObjectMapper objectMapper) {
+        this.objectMapper = objectMapper
+    }
+
+    Object getResource(String name) {
+        String json = BlocksHandler.class.getResourceAsStream("/" + name)?.text
+        if (json == null) {
+            return null
+        }
+        return objectMapper.readValue(json, Map)
+    }
+
+    CallHandler.Result respondWith(String name) {
+        return CallHandler.Result.ok(getResource(name))
+    }
+
+}

testing/simple-upstream/src/main/groovy/testing/SimpleUpstream.groovy

@@ -13,7 +13,7 @@ class SimpleUpstream {
     void prepare() {
         objectMapper = new ObjectMapper()
 
-        handlers << new TestcaseHandler()
+        handlers << new TestcaseHandler(objectMapper)
         handlers << new CommonHandlers()
         handlers << new BlocksHandler(objectMapper)
         handlers << new InvalidCallHandler()

testing/simple-upstream/src/main/groovy/testing/TestcaseHandler.groovy

@@ -1,7 +1,17 @@
 package testing
 
+import com.fasterxml.jackson.databind.ObjectMapper
+
 class TestcaseHandler implements CallHandler {
 
+    ObjectMapper objectMapper
+    ResourceResponse resourceResponse
+
+    TestcaseHandler(ObjectMapper objectMapper) {
+        this.objectMapper = objectMapper
+        this.resourceResponse = new ResourceResponse(objectMapper)
+    }
+
     @Override
     Result handle(String method, List<Object> params) {
         // https://github.com/emeraldpay/dshackle/issues/35
@@ -9,6 +19,11 @@ class TestcaseHandler implements CallHandler {
                 && params[0].to?.toLowerCase() == "0x542156d51D10Db5acCB99f9Db7e7C91B74E80a2c".toLowerCase()) {
             return Result.error(-32015, "VM execution error.")
         }
+        // https://github.com/emeraldpay/dshackle/issues/43
+        if (method == "debug_traceTransaction"
+                && params[0].toLowerCase() == "0xd949bc0fe1a5d16f4522bc47933554dcc4ada0493ff71ee1973b2410257af9fe".toLowerCase()) {
+            return resourceResponse.respondWith("trace-0xd949bc.json")
+        }
         return null
     }
 }