Use array for events.

README.md

@@ -13,7 +13,36 @@ Monitors an NFT contract for `Mint` events
 ### Twitter message
 
 Use the `TWITTER_MESSAGE_TEMPLATE` value in `.env` to format your tweet.
-If you need access to additional variables please open an issue or submit a pull request.
+You will have access to the `event` object (example below).
+The value will be interpreted as a string literal and may include variables of format `${event.transactionHash}`
+
+```javascript
+{
+  removed: false,
+  logIndex: 342,
+  transactionIndex: 294,
+  transactionHash: '0x48378b555048baf27aed8fc7f4e1526a64dd91a2206d0d79690ee77e063ce97e',
+  blockHash: '0xd0d3af59b2eca4bff3651ee09417f105756d206a4dd84674893f64fd31bf9dbe',
+  blockNumber: 12310282,
+  address: '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2',
+  id: 'log_8626df84',
+  returnValues: Result {
+    '0': '0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D',
+    '1': '6610245104149876',
+    src: '0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D',
+    wad: '6610245104149876'
+  },
+  event: 'Withdrawal',
+  signature: '0x7fcf532c15f0a6db0bd6d0e038bea71d30d808c7d98cb3bf7268a95bf5081b65',
+  raw: {
+    data: '0x00000000000000000000000000000000000000000000000000177bfb9f4fa574',
+    topics: [
+      '0x7fcf532c15f0a6db0bd6d0e038bea71d30d808c7d98cb3bf7268a95bf5081b65'
+      '0x0000000000000000000000007a250d5630b4cf539739df2c5dacb4c659f2488d'
+    ]
+  }
+}
+```
 
 ## Running the app
 

index.js

@@ -11,8 +11,10 @@ const {
   WSURL,
   ETHERSCAN_ABI_URL,
   ETHERSCAN_API_KEY,
-  CONTRACT_ADDRESS } = process.env
+  CONTRACT_ADDRESS,
+  CONTRACT_EVENTS } = process.env
 
+const CONTRACT_EVENTS_ARRAY = CONTRACT_EVENTS.split(',')
 const Web3 = require('web3')
 const Twitter = require('twitter')
 const restClient = require('node-rest-client-promise').Client();
@@ -24,10 +26,10 @@ const twitterClient = new Twitter({
   access_token_secret: TWITTER_ACCESS_TOKEN_SECRET
 })
 
-function postToTwitter(transaction_hash) {
+function postToTwitter(event) {
   const msg = eval('`'+ TWITTER_MESSAGE_TEMPLATE + '`')
   return twitterClient.post('statuses/update', {status: msg},  function(error, tweet, response) {
-      if(error) return console.log(JSON.stringify(error))
+      if (error) return console.log(JSON.stringify(error))
   });
 }
 
@@ -44,10 +46,9 @@ async function eventQuery(){
   let lastHash
 	contract.events.allEvents()
 		.on('data', (event) => {
-      console.log(event)
-      if (event.event === 'Deposit' && event.transactionHash !== lastHash) {
+      if (CONTRACT_EVENTS_ARRAY.includes(event.event) && event.transactionHash !== lastHash) {
         lastHash = event.transactionHash // dedupe
-        postToTwitter(event.transactionHash)
+        postToTwitter(event)
       }
 		})
 		.on('error', console.error)

sample.env

@@ -1,9 +1,10 @@
-TWITTER_API_KEY=abc123
-TWITTER_API_SECRET_KEY=abc123
-TWITTER_ACCESS_TOKEN=abc123
-TWITTER_ACCESS_TOKEN_SECRET=abc123
-TWITTER_MESSAGE_TEMPLATE="Deposit event heard at transaction hash ${transaction_hash}"
+TWITTER_API_KEY=YOUR-API-KEY
+TWITTER_API_SECRET_KEY=YOUR-API-SECRET
+TWITTER_ACCESS_TOKEN=YOUR-ACCESS-TOKEN
+TWITTER_ACCESS_TOKEN_SECRET=YOUR-TOKEN-SECRET
+TWITTER_MESSAGE_TEMPLATE="${event.event} event heard at transaction hash ${event.transactionHash}, Block number: ${event.blockNumber}"
 WSURL=wss://mainnet.infura.io/ws/v3/YOUR-PROJECT-ID
-ETHERSCAN_ABI_URL=https://YOUR-api.etherscan.io/api?module=contract&action=getabi&address=
-ETHERSCAN_API_KEY=abc123
+ETHERSCAN_ABI_URL=https://api-YOUR-ACCOUNT.etherscan.io/api?module=contract&action=getabi&address=
+ETHERSCAN_API_KEY=YOUR-API-KEY
 CONTRACT_ADDRESS=0xffffffffffffffffffffffffffffffffffffffff
+CONTRACT_EVENTS=Deposit,Withdrawal