fix replacement bug

config.js

@@ -1,7 +1,7 @@
 require('dotenv').config()
 
 module.exports = {
-  version: '1.1',
+  version: '1.2',
   netId: Number(process.env.NET_ID) || 42,
   redisUrl: process.env.REDIS_URL,
   rpcUrl: process.env.RPC_URL || 'https://kovan.infura.io/',

src/relayController.js

@@ -153,7 +153,8 @@ async function sendTx(tx, done, retryAttempt = 1) {
     console.log('error', e.message)
     if(e.message === 'Returned error: Transaction gas price supplied is too low. There is another transaction with same nonce in the queue. Try increasing the gas price or incrementing the nonce.' 
     || e.message === 'Returned error: Transaction nonce is too low. Try incrementing the nonce.'
-    || e.message === 'Returned error: nonce too low') {
+    || e.message === 'Returned error: nonce too low'
+    || e.message === 'Returned error: replacement transaction underpriced') {
       console.log('nonce too low, retrying')
       if(retryAttempt <= 10) {
         retryAttempt++