[ANCHOR-435]: Update event callback schema

api-schema/src/main/java/org/stellar/anchor/api/callback/SendEventRequest.java

@@ -11,10 +11,14 @@
 @AllArgsConstructor
 @NoArgsConstructor
 public class SendEventRequest {
-  /** The seconds since the Unix epoch, UTC. */
-  Long timestamp;
+  /** The ID of the event */
+  String id;
+  /** The ISO 8601 UTC datetime string */
+  String timestamp;
+  /** The type of event */
+  String type;
   /** The event payload. */
-  AnchorEvent payload;
+  SendEventRequestPayload payload;
 
   /**
    * Creates a SendEventRequest from an AnchorEvent.
@@ -24,8 +28,10 @@ public class SendEventRequest {
    */
   public static SendEventRequest from(AnchorEvent event) {
     SendEventRequest request = new SendEventRequest();
-    request.setTimestamp(Instant.now().getEpochSecond());
-    request.setPayload(event);
+    request.setId(event.getId());
+    request.setType(event.getType().toString().toLowerCase());
+    request.setTimestamp(Instant.now().toString());
+    request.setPayload(SendEventRequestPayload.from(event));
     return request;
   }
 }

api-schema/src/main/java/org/stellar/anchor/api/callback/SendEventRequestPayload.java

@@ -0,0 +1,37 @@
+package org.stellar.anchor.api.callback;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.stellar.anchor.api.event.AnchorEvent;
+import org.stellar.anchor.api.platform.GetQuoteResponse;
+import org.stellar.anchor.api.platform.GetTransactionResponse;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class SendEventRequestPayload {
+  GetTransactionResponse transaction;
+  GetQuoteResponse quote;
+
+  /**
+   * Creates a SendEventRequestPayload from an AnchorEvent.
+   *
+   * @param event
+   * @return a SendEventRequestPayload
+   */
+  public static SendEventRequestPayload from(AnchorEvent event) {
+    SendEventRequestPayload payload = new SendEventRequestPayload();
+    switch (event.getType()) {
+      case QUOTE_CREATED:
+        payload.setQuote(event.getQuote());
+      case TRANSACTION_CREATED:
+        payload.setTransaction(event.getTransaction());
+      case TRANSACTION_ERROR:
+        payload.setTransaction(event.getTransaction());
+      case TRANSACTION_STATUS_CHANGED:
+        payload.setTransaction(event.getTransaction());
+    }
+    return payload;
+  }
+}

integration-tests/src/test/kotlin/org/stellar/anchor/platform/KotlinReferenceServerIntegrationTest.kt

@@ -41,34 +41,33 @@ internal class KotlinReferenceServerIntegrationTest {
       client.sendEvent(sendEventRequest1)
       var latestEvent = client.getLatestEvent()
       Assertions.assertNotNull(latestEvent)
-      JSONAssert.assertEquals(json(latestEvent), json(sendEventRequest1.payload), true)
+      JSONAssert.assertEquals(json(latestEvent), json(sendEventRequest1), true)
       // send event2
       client.sendEvent(sendEventRequest2)
       latestEvent = client.getLatestEvent()
       Assertions.assertNotNull(latestEvent)
-      JSONAssert.assertEquals(json(latestEvent), json(sendEventRequest2.payload), true)
+      JSONAssert.assertEquals(json(latestEvent), json(sendEventRequest2), true)
       // check if there are totally two events recorded
       assertEquals(client.getEvents().size, 2)
-      JSONAssert.assertEquals(json(client.getEvents()[0]), json(sendEventRequest1.payload), true)
-      JSONAssert.assertEquals(json(client.getEvents()[1]), json(sendEventRequest2.payload), true)
+      JSONAssert.assertEquals(json(client.getEvents()[0]), json(sendEventRequest1), true)
+      JSONAssert.assertEquals(json(client.getEvents()[1]), json(sendEventRequest2), true)
     }
   }
 
   companion object {
     val sendEventRequestJson =
       """
       {
-          "timestamp": 1000000,
+          "timestamp": "2011-10-05T14:48:00.000Z",
+          "id": "2a419880-0dde-4821-90cb-f3bfcb671ea3",
+          "type": "transaction_created",
           "payload": {
-              "type": "TRANSACTION_CREATED",
-              "id": 100,
-              "sep": 24,
-              "transaction": {
-                "amount_in": {
-                  "amount": "10.0",
-                  "asset": "USDC"
-                }
+            "transaction": {
+              "amount_in": {
+                "amount": "10.0",
+                "asset": "USDC"
               }
+            }
           }
       }
     """
@@ -77,11 +76,10 @@ internal class KotlinReferenceServerIntegrationTest {
     val sendEventRequestJson2 =
       """
 {
-  "timestamp": 1000000,
+  "id": "2a419880-0dde-4821-90cb-f3bfcb671ea3",
+  "timestamp": "2011-10-05T14:48:00.000Z",
+  "type": "quote_created",
   "payload": {
-    "type": "TRANSACTION_CREATED",
-    "id": 100,
-    "sep": 24,
     "quote": {
       "sell_amount": "10.0",
       "buy_amount": "1"