Merge pull request #121 from smartcontractkit/feature/tusd-total

Update TrustToken adapter

Author: thodges-gh

trueusd/README.md

@@ -1,8 +1,12 @@
-# Chainlink External Adapter for trueusd
+# Chainlink External Adapter for TrueUSD
+
+## Total Supply API
+
+https://core-api.real-time-attest.trustexplorer.io/trusttoken/TrueUSD
 
 ## Input Params
 
-_No params_
+- `field`: The data field to return. (defaults to `totalToken`, one of `totalToken`, `totalTrust`)
 
 ## Output
 
@@ -23,9 +27,9 @@ _No params_
     "message": [{ "msg": "get contractSupply successfully" }],
     "success": true,
     "responseCode": 200,
-    "result": 347215038.53
+    "result": 343465335.4587567
   },
-  "result": 347215038.53,
+  "result": 343465335.4587567,
   "statusCode": 200
 }
 ```

trueusd/adapter.js

@@ -5,19 +5,21 @@ const customError = (data) => {
   return false
 }
 
+const supplyParams = {
+  field: false,
+}
+
 const execute = (input, callback) => {
-  const validator = new Validator(input)
+  const validator = new Validator(input, supplyParams)
   if (validator.error) return callback(validator.error.statusCode, validator.error)
 
   const jobRunID = validator.validated.id
   const url = 'https://core-api.real-time-attest.trustexplorer.io/trusttoken/TrueUSD'
+  const field = validator.validated.data.field || 'totalToken'
 
   Requester.request(url, customError)
     .then((response) => {
-      response.data.result = Requester.validateResultNumber(response.data, [
-        'responseData',
-        'totalTrust',
-      ])
+      response.data.result = Requester.validateResultNumber(response.data, ['responseData', field])
       callback(response.status, Requester.success(jobRunID, response))
     })
     .catch((error) => callback(500, Requester.errored(jobRunID, error)))

trueusd/test/adapter_test.js

@@ -1,5 +1,5 @@
 const { assert } = require('chai')
-const { assertSuccess } = require('@chainlink/external-adapter')
+const { assertSuccess, assertError } = require('@chainlink/external-adapter')
 const { execute } = require('../adapter')
 
 describe('execute', () => {
@@ -9,13 +9,16 @@ describe('execute', () => {
     const requests = [
       {
         name: 'id not supplied',
-        testData: { data: {} },
+        testData: { data: { field: 'totalTrust' } },
       },
       {
         name: 'id is supplied',
-        testData: { id: jobID, data: {} },
+        testData: { id: jobID, data: { field: 'totalTrust' } },
+      },
+      {
+        name: 'trust supply',
+        testData: { id: jobID, data: { field: 'totalToken' } },
       },
-      { name: 'empty body', testData: {} },
     ]
 
     requests.forEach((req) => {
@@ -29,4 +32,22 @@ describe('execute', () => {
       })
     })
   })
+
+  context('error calls @integration', () => {
+    const requests = [
+      {
+        name: 'unknown field',
+        testData: { id: jobID, data: { field: 'not_real' } },
+      },
+    ]
+
+    requests.forEach((req) => {
+      it(`${req.name}`, (done) => {
+        execute(req.testData, (statusCode, data) => {
+          assertError({ expected: 500, actual: statusCode }, data, jobID)
+          done()
+        })
+      })
+    })
+  })
 })