diff --git a/packages/api/src/abi/ConfluxEthUsd.json b/packages/api/src/abi/ConfluxEthUsd.json
new file mode 100644
index 00000000..121f8ca4
--- /dev/null
+++ b/packages/api/src/abi/ConfluxEthUsd.json
@@ -0,0 +1,116 @@
+[
+  {
+    "inputs": [
+      { "internalType": "address", "name": "_wrb", "type": "address" }
+    ],
+    "stateMutability": "nonpayable",
+    "type": "constructor"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": false,
+        "internalType": "uint64",
+        "name": "",
+        "type": "uint64"
+      }
+    ],
+    "name": "PriceUpdated",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": false,
+        "internalType": "string",
+        "name": "",
+        "type": "string"
+      }
+    ],
+    "name": "ResultError",
+    "type": "event"
+  },
+  {
+    "inputs": [],
+    "name": "ETHUSD3ID",
+    "outputs": [{ "internalType": "bytes32", "name": "", "type": "bytes32" }],
+    "stateMutability": "view",
+    "type": "function",
+    "constant": true
+  },
+  {
+    "inputs": [],
+    "name": "lastPrice",
+    "outputs": [{ "internalType": "uint64", "name": "", "type": "uint64" }],
+    "stateMutability": "view",
+    "type": "function",
+    "constant": true
+  },
+  {
+    "inputs": [],
+    "name": "lastRequestId",
+    "outputs": [{ "internalType": "uint256", "name": "", "type": "uint256" }],
+    "stateMutability": "view",
+    "type": "function",
+    "constant": true
+  },
+  {
+    "inputs": [],
+    "name": "pending",
+    "outputs": [{ "internalType": "bool", "name": "", "type": "bool" }],
+    "stateMutability": "view",
+    "type": "function",
+    "constant": true
+  },
+  {
+    "inputs": [],
+    "name": "request",
+    "outputs": [
+      {
+        "internalType": "contract WitnetRequest",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function",
+    "constant": true
+  },
+  {
+    "inputs": [],
+    "name": "timestamp",
+    "outputs": [{ "internalType": "uint256", "name": "", "type": "uint256" }],
+    "stateMutability": "view",
+    "type": "function",
+    "constant": true
+  },
+  {
+    "inputs": [],
+    "name": "requestUpdate",
+    "outputs": [],
+    "stateMutability": "payable",
+    "type": "function",
+    "payable": true
+  },
+  {
+    "inputs": [],
+    "name": "completeUpdate",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [{ "internalType": "bytes32", "name": "_id", "type": "bytes32" }],
+    "name": "valueFor",
+    "outputs": [
+      { "internalType": "int256", "name": "", "type": "int256" },
+      { "internalType": "uint256", "name": "", "type": "uint256" },
+      { "internalType": "uint256", "name": "", "type": "uint256" }
+    ],
+    "stateMutability": "view",
+    "type": "function",
+    "constant": true
+  }
+]
diff --git a/packages/api/src/dataFeeds.json b/packages/api/src/dataFeeds.json
index 1b2159cd..e4a4cf61 100644
--- a/packages/api/src/dataFeeds.json
+++ b/packages/api/src/dataFeeds.json
@@ -70,5 +70,29 @@
       "address": "0x0C4be6AA667df48de54BA174bE7948875fdf152B",
       "abi": "./src/abi/WitnetRequestBoardProxy.json"
     }
+  },
+  {
+    "abi": "./src/abi/ConfluxBtcUsd.json",
+    "address": "0x8934bfeFb0d5d7d4f1fbEf558562f6487787b6cC",
+    "witnetRequestBoard": {
+      "address": "0x84f3342E460265D1A271Fc1Bd678A361a9208e72",
+      "abi": "./src/abi/ConfluxWitnetRequestBoardProxy.json"
+    },
+    "network": "conflux",
+    "name": "btc/usd",
+    "label": "$",
+    "pollingPeriod": 900000
+  },
+  {
+    "abi": "./src/abi/ConfluxEthUsd.json",
+    "address": "0x8E5C614bA4DA97E823D4C3f0DCB02c872C84E6C3",
+    "witnetRequestBoard": {
+      "address": "0x84f3342E460265D1A271Fc1Bd678A361a9208e72",
+      "abi": "./src/abi/ConfluxWitnetRequestBoardProxy.json"
+    },
+    "network": "conflux",
+    "name": "eth/usd",
+    "label": "$",
+    "pollingPeriod": 900000
   }
 ]
diff --git a/packages/api/src/index.ts b/packages/api/src/index.ts
index 3f1bee3f..03572729 100644
--- a/packages/api/src/index.ts
+++ b/packages/api/src/index.ts
@@ -38,24 +38,25 @@ async function main () {
 function readDataFeeds (): Array<FeedInfo> {
   console.log('DIRNAME', __dirname)
   console.log('DATA_FEED_CONFIG_PATH:>', process.env.DATA_FEED_CONFIG_PATH)
-  console.log('resolve path: ', path.resolve(process.env.DATA_FEED_CONFIG_PATH || './dataFeeds.json'))
+  console.log(
+    'resolve path: ',
+    path.resolve(process.env.DATA_FEED_CONFIG_PATH || './dataFeeds.json')
+  )
 
   const dataFeeds: Array<FeedInfoConfig> = JSON.parse(
-    fs.readFileSync(path.resolve(process.env.DATA_FEED_CONFIG_PATH || './dataFeeds.json'), 'utf-8')
+    fs.readFileSync(
+      path.resolve(process.env.DATA_FEED_CONFIG_PATH || './dataFeeds.json'),
+      'utf-8'
+    )
   )
 
   return dataFeeds.map(dataFeed => ({
     ...dataFeed,
-    abi: JSON.parse(
-      fs.readFileSync(path.resolve(dataFeed.abi), 'utf-8')
-    ),
+    abi: JSON.parse(fs.readFileSync(path.resolve(dataFeed.abi), 'utf-8')),
     witnetRequestBoard: {
       ...dataFeed.witnetRequestBoard,
       abi: JSON.parse(
-        fs.readFileSync(
-          path.resolve(dataFeed.witnetRequestBoard.abi),
-          'utf-8'
-        )
+        fs.readFileSync(path.resolve(dataFeed.witnetRequestBoard.abi), 'utf-8')
       )
     }
   }))
diff --git a/packages/api/src/repository/Feed.ts b/packages/api/src/repository/Feed.ts
index 02b23794..4646e156 100644
--- a/packages/api/src/repository/Feed.ts
+++ b/packages/api/src/repository/Feed.ts
@@ -26,7 +26,9 @@ export class FeedRepository {
     ).map(this.normalizeId)
   }
 
-  async insert (feed: Omit<FeedDbObject, '_id'>): Promise<FeedDbObjectNormalized | null> {
+  async insert (
+    feed: Omit<FeedDbObject, '_id'>
+  ): Promise<FeedDbObjectNormalized | null> {
     if (this.isValidFeed(feed)) {
       const response = await this.collection.insertOne(feed)
 
@@ -38,7 +40,10 @@ export class FeedRepository {
     }
   }
 
-  async addResultRequest (feedId: ObjectId, resultRequestId: ObjectId): Promise<FeedDbObjectNormalized> {
+  async addResultRequest (
+    feedId: ObjectId,
+    resultRequestId: ObjectId
+  ): Promise<FeedDbObjectNormalized> {
     const response = await this.collection.findOneAndUpdate(
       { _id: feedId },
       { $push: { requests: resultRequestId } },
@@ -54,7 +59,10 @@ export class FeedRepository {
     )
   }
 
-  async getFeeds (page: number, size: number): Promise<Array<FeedDbObjectNormalized>> {
+  async getFeeds (
+    page: number,
+    size: number
+  ): Promise<Array<FeedDbObjectNormalized>> {
     return (
       await this.collection
         .find({ address: { $in: this.dataFeedsAddresses } })
@@ -82,6 +90,6 @@ export class FeedRepository {
   }
 
   private isValidFeed (feed: Omit<FeedDbObject, '_id'>): boolean {
-    return !containFalsyValues(feed) 
+    return !containFalsyValues(feed)
   }
 }
diff --git a/packages/api/src/repository/ResultRequest.ts b/packages/api/src/repository/ResultRequest.ts
index 7ea4c175..6387c800 100644
--- a/packages/api/src/repository/ResultRequest.ts
+++ b/packages/api/src/repository/ResultRequest.ts
@@ -18,7 +18,9 @@ export class ResultRequestRepository {
     this.dataFeedsAddresses = dataFeeds.map(dataFeed => dataFeed.address)
   }
 
-  async getFeedRequests (feedId: ObjectId): Promise<Array<ResultRequestDbObjectNormalized>> {
+  async getFeedRequests (
+    feedId: ObjectId
+  ): Promise<Array<ResultRequestDbObjectNormalized>> {
     return (
       await this.collection
         .find({
@@ -29,7 +31,11 @@ export class ResultRequestRepository {
     ).map(this.normalizeId)
   }
 
-  async getFeedRequestsPage (feedId: ObjectId, page: number, size: number): Promise<Array<ResultRequestDbObjectNormalized>> {
+  async getFeedRequestsPage (
+    feedId: ObjectId,
+    page: number,
+    size: number
+  ): Promise<Array<ResultRequestDbObjectNormalized>> {
     return (
       await this.collection
         .find({
@@ -42,7 +48,9 @@ export class ResultRequestRepository {
     ).map(this.normalizeId)
   }
 
-  async getLastResult (feedId: ObjectId): Promise<ResultRequestDbObjectNormalized> {
+  async getLastResult (
+    feedId: ObjectId
+  ): Promise<ResultRequestDbObjectNormalized> {
     const lastResultRequest = await this.collection.findOne(
       {
         feedId: feedId.toString()
@@ -61,7 +69,9 @@ export class ResultRequestRepository {
     return this.normalizeId(lastResultRequest)
   }
 
-  async insert (resultRequest: Omit<ResultRequestDbObject, '_id'>): Promise<ResultRequestDbObjectNormalized | null> {
+  async insert (
+    resultRequest: Omit<ResultRequestDbObject, '_id'>
+  ): Promise<ResultRequestDbObjectNormalized | null> {
     if (this.isValidResultRequest(resultRequest)) {
       const response = await this.collection.insertOne(resultRequest)
 
diff --git a/packages/api/src/repository/containFalsyValues.ts b/packages/api/src/repository/containFalsyValues.ts
index 7e01ea3f..17d65f2b 100644
--- a/packages/api/src/repository/containFalsyValues.ts
+++ b/packages/api/src/repository/containFalsyValues.ts
@@ -1,3 +1,3 @@
-export function containFalsyValues(obj: Object): boolean {
+export function containFalsyValues (obj: Object): boolean {
   return !Object.values(obj).reduce((prev, val) => prev && val)
-}
\ No newline at end of file
+}
diff --git a/packages/api/src/web3Middleware/dataFeeds.ts b/packages/api/src/web3Middleware/dataFeeds.ts
deleted file mode 100644
index fb629020..00000000
--- a/packages/api/src/web3Middleware/dataFeeds.ts
+++ /dev/null
@@ -1,68 +0,0 @@
-// import { FeedInfo, Network, AbiItem } from '../types'
-// import BtcUsdAbi from './abi/BtcUsd.json'
-// import ConfluxBtcUsdAbi from './abi/ConfluxBtcUsd.json'
-// import ConfluxWitnetRequestBoardProxy from './abi/ConfluxWitnetRequestBoardProxy.json'
-// import WitnetRequestBoardProxy from './abi/WitnetRequestBoardProxy.json'
-
-// export const dataFeeds: Array<FeedInfo> = [
-//   {
-//     abi: BtcUsdAbi as Array<AbiItem>,
-//     address: '0xa3AFD68122a21c7D21Ddd95E5c077f958dA46662',
-//     network: Network.Goerli,
-//     name: 'btc/usd',
-//     label: '$',
-//     pollingPeriod: 10000,
-//     witnetRequestBoard: {
-//       address: '0x0C4be6AA667df48de54BA174bE7948875fdf152B',
-//       abi: WitnetRequestBoardProxy as Array<AbiItem>
-//     }
-//   },
-//   {
-//     abi: BtcUsdAbi as Array<AbiItem>,
-//     address: '0x56834Ff8D4b27db647Da97CA3bd8540f7fA0e89D',
-//     network: Network.Kovan,
-//     name: 'btc/usd',
-//     label: '$',
-//     pollingPeriod: 15000,
-//     witnetRequestBoard: {
-//       address: '0xD9a6d1Ea0d0f4795985725C7Bd40C31a667c033d',
-//       abi: WitnetRequestBoardProxy as Array<AbiItem>
-//     }
-//   },
-//   {
-//     abi: BtcUsdAbi as Array<AbiItem>,
-//     address: '0x49C0BCce51a8B28f92d008394F06d5B259657F33',
-//     witnetRequestBoard: {
-//       address: '0x9b42b0D80C428B17A5828dF5C2c96454ca54bD04',
-//       abi: WitnetRequestBoardProxy as Array<AbiItem>
-//     },
-//     network: Network.Rinkeby,
-//     name: 'btc/usd',
-//     label: '$',
-//     pollingPeriod: 10000
-//   },
-//   {
-//     abi: ConfluxBtcUsdAbi as Array<AbiItem>,
-//     address: '0x83803e703fb38d8682b53C698B7330dfd262E949',
-//     witnetRequestBoard: {
-//       address: '0x80786fD4878c98EC22559942e533223CaA8B003F',
-//       abi: ConfluxWitnetRequestBoardProxy as Array<AbiItem>
-//     },
-//     network: Network.Conflux,
-//     name: 'btc/usd',
-//     label: '$',
-//     pollingPeriod: 10000
-//   },
-//   {
-//     abi: ConfluxBtcUsdAbi as Array<AbiItem>,
-//     address: '0x8aE319e40dE6Cbb2226d4C449375d429d6782739',
-//     witnetRequestBoard: {
-//       address: '0x80786fD4878c98EC22559942e533223CaA8B003F',
-//       abi: ConfluxWitnetRequestBoardProxy as Array<AbiItem>
-//     },
-//     network: Network.Conflux,
-//     name: 'eth/usd',
-//     label: '$',
-//     pollingPeriod: 10000
-//   }
-// ]
diff --git a/packages/api/src/web3Middleware/index.ts b/packages/api/src/web3Middleware/index.ts
index f6b8ec78..2d028fdd 100644
--- a/packages/api/src/web3Middleware/index.ts
+++ b/packages/api/src/web3Middleware/index.ts
@@ -54,11 +54,7 @@ export class Web3Middleware {
       return feed
     })
 
-    try {
-      return await Promise.all(promises)
-    } catch (err) {
-      console.error('[ERROR]', err.message)
-    }
+    return await Promise.all(promises)
   }
 
   async listen () {
diff --git a/packages/api/test/containFalsyValues.spec.ts b/packages/api/test/containFalsyValues.spec.ts
index ce0cb12c..4b02003f 100644
--- a/packages/api/test/containFalsyValues.spec.ts
+++ b/packages/api/test/containFalsyValues.spec.ts
@@ -4,7 +4,7 @@ describe('containFalsyValues', () => {
   it('should return FALSE when no falsy value is found on the object', () => {
     const obj = {
       a: 'a',
-      b: 'b',
+      b: 'b'
     }
 
     expect(containFalsyValues(obj)).toBe(false)
@@ -13,9 +13,9 @@ describe('containFalsyValues', () => {
   it('should return TRUE when falsy value is found on the object', () => {
     const obj = {
       a: 'a',
-      b: null,
+      b: null
     }
 
     expect(containFalsyValues(obj)).toBe(true)
   })
-})
\ No newline at end of file
+})
diff --git a/packages/api/tsconfig.json b/packages/api/tsconfig.json
index b21f40b0..3a5a9f94 100644
--- a/packages/api/tsconfig.json
+++ b/packages/api/tsconfig.json
@@ -10,7 +10,7 @@
     "noUnusedLocals": true,
     "noUnusedParameters": true,
     "resolveJsonModule": true,
-    "noImplicitReturns": true,
+    "noImplicitReturns": true
   },
   "include": ["src/"],
   "exclude": ["node_modules", "test"]