[Coinmetrics-lwba] Updates result to include mid (#3950)

* [Coinmetrics-lwba] Updates result to include mid

* Ensures to run the original endpoint validation

---------

Co-authored-by: app-token-issuer-data-feeds[bot] <134377064+app-token-issuer-data-feeds[bot]@users.noreply.github.com>

Author: mohamed-mehany

.changeset/brave-spoons-explode.md

@@ -0,0 +1,5 @@
+---
+'@chainlink/coinmetrics-lwba-adapter': minor
+---
+
+Updates result to include mid

packages/sources/coinmetrics-lwba/src/index.ts

@@ -2,6 +2,8 @@ import { makeConfig } from '@chainlink/coinmetrics-adapter/config'
 import { endpoint } from '@chainlink/coinmetrics-adapter/endpoint/lwba'
 import { expose, ServerInstance } from '@chainlink/external-adapter-framework'
 import { Adapter } from '@chainlink/external-adapter-framework/adapter'
+import { AdapterResponse } from '@chainlink/external-adapter-framework/util/types'
+import { AdapterError } from '@chainlink/external-adapter-framework/validation/error'
 
 export const config = makeConfig({
   NAME: 'COINMETRICS_LWBA',
@@ -14,6 +16,20 @@ export const config = makeConfig({
 
 const newEndpoint = Object.assign(Object.create(Object.getPrototypeOf(endpoint)), endpoint)
 newEndpoint.aliases.push('crypto', 'price')
+const originalValidate = endpoint.customOutputValidation
+newEndpoint.customOutputValidation = (resp: AdapterResponse): AdapterError | undefined => {
+  const err = originalValidate?.(resp)
+  if (err) {
+    return err
+  }
+  if (!resp.errorMessage) {
+    const mid = (resp.data as any)?.mid
+    if (mid !== undefined) {
+      resp.result = mid
+    }
+  }
+  return undefined // no validation error
+}
 
 export const adapter = new Adapter({
   defaultEndpoint: newEndpoint.name,

packages/sources/coinmetrics-lwba/test/integration/__snapshots__/adapter-ws.test.ts.snap

@@ -7,7 +7,7 @@ exports[`crypto-lwba websocket happy path returns a successful response 1`] = `
     "bid": 1562.3384315992228,
     "mid": 1562.3733948803842,
   },
-  "result": null,
+  "result": 1562.3733948803842,
   "statusCode": 200,
   "timestamps": {
     "providerDataReceivedUnixMs": 1024,
@@ -24,7 +24,7 @@ exports[`crypto-lwba websocket happy path returns a successful response for cryp
     "bid": 1562.3384315992228,
     "mid": 1562.3733948803842,
   },
-  "result": null,
+  "result": 1562.3733948803842,
   "statusCode": 200,
   "timestamps": {
     "providerDataReceivedUnixMs": 1024,
@@ -41,7 +41,7 @@ exports[`crypto-lwba websocket happy path returns a successful response for pric
     "bid": 1562.3384315992228,
     "mid": 1562.3733948803842,
   },
-  "result": null,
+  "result": 1562.3733948803842,
   "statusCode": 200,
   "timestamps": {
     "providerDataReceivedUnixMs": 1024,