diff --git a/src/TxManager.js b/src/TxManager.js
index 330abe7..34dd466 100644
--- a/src/TxManager.js
+++ b/src/TxManager.js
@@ -35,11 +35,7 @@ class TxManager {
     this._web3.eth.defaultAccount = this.address
     this._gasPriceOracle = new GasPriceOracle({ defaultRpc: rpcUrl })
     this._mutex = new Mutex()
-  }
-
-  // todo get rid of it
-  async init() {
-    this.nonce = await this._web3.eth.getTransactionCount(this.address, 'latest')
+    this.nonce
   }
 
   /**
@@ -57,6 +53,9 @@ class TxManager {
   async _submit(tx, emitter) {
     const release = await this._mutex.acquire()
     try {
+      if (!this.nonce) {
+        this.nonce = await this._web3.eth.getTransactionCount(this.address, 'latest')
+      }
       return new Transaction(tx, emitter, this).submit()
     } finally {
       release()
@@ -85,7 +84,9 @@ class Transaction {
 
   async _prepare() {
     this.tx.gas = await this._web3.eth.estimateGas(this.tx)
-    this.tx.gasPrice = await this._getGasPrice('fast')
+    if (!this.tx.gasPrice) {
+      this.tx.gasPrice = await this._getGasPrice('fast')
+    }
     this.tx.nonce = this.nonce
   }
 
@@ -111,13 +112,23 @@ class Transaction {
 
         await sleep(this.config.POLL_INTERVAL)
       }
-      console.log('Mined. Start waiting for confirmations...')
-      await sleep(5000) // todo
+
       let receipt = await this._getReceipts()
+      let retryAttempt = 5
+      while (retryAttempt >= 0 && !receipt) {
+        console.log('retryAttempt', retryAttempt)
+        await sleep(1000)
+        receipt = await this._getReceipts()
+        retryAttempt--
+      }
+
       if (!receipt) {
         // resubmit
       }
 
+      console.log('Mined. Start waiting for confirmations...')
+      this.emitter.emit('mined', receipt)
+
       let currentBlock = await this._web3.eth.getBlockNumber()
       let confirmations = currentBlock > receipt.blockNumber ? currentBlock - receipt.blockNumber : 0
       while (confirmations <= this.config.CONFIRMATIONS) {
diff --git a/src/utils.js b/src/utils.js
index 9cf5645..950fa41 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -2,7 +2,7 @@ const { instances, netId } = require('../config')
 const { poseidon } = require('circomlib')
 const { toBN } = require('web3-utils')
 
-const sleep = (ms) => new Promise(res => setTimeout(res, ms))
+const sleep = (ms) => new Promise((res) => setTimeout(res, ms))
 
 function getInstance(address) {
   const inst = instances[`netId${netId}`]
@@ -30,19 +30,25 @@ const poseidonHash = (items) => toBN(poseidon(items).toString())
 const poseidonHash2 = (a, b) => poseidonHash([a, b])
 
 function setSafeInterval(func, interval) {
-  func().catch(console.error).finally(() => {
-    setTimeout(() => setSafeInterval(func, interval), interval)
-  })
+  func()
+    .catch(console.error)
+    .finally(() => {
+      setTimeout(() => setSafeInterval(func, interval), interval)
+    })
 }
 
 /**
  * A promise that resolves when the source emits specified event
  */
 function when(source, event) {
-  return new Promise(resolve => {
-    source.once(event, payload => {
-      resolve(payload)
-    })
+  return new Promise((resolve, reject) => {
+    source
+      .once(event, (payload) => {
+        resolve(payload)
+      })
+      .on('error', (error) => {
+        reject(error)
+      })
   })
 }
 
diff --git a/testTxManager.js b/testTxManager.js
index 9474534..8e9d0ef 100644
--- a/testTxManager.js
+++ b/testTxManager.js
@@ -1,28 +1,38 @@
 const { toHex, toWei } = require('web3-utils')
 const TxManager = require('./src/TxManager')
 const { rpcUrl, privateKey } = require('./config')
+
 const TxM = new TxManager({
   privateKey,
   rpcUrl,
+  config: {
+    CONFIRMATIONS: 2,
+    GAS_BUMP_INTERVAL: 1000 * 15,
+  },
 })
 
 const tx = {
   from: '0x03Ebd0748Aa4D1457cF479cce56309641e0a98F5',
   value: 0,
-  gasPrice: toHex(toWei('1', 'gwei')),
+  // gasPrice: toHex(toWei('0.1', 'gwei')),
   to: '0x03Ebd0748Aa4D1457cF479cce56309641e0a98F5',
 }
 
 async function main() {
-  await TxM.init()
   const receipt = await TxM.submit(tx)
     .on('transactionHash', (hash) => {
       console.log('hash', hash)
     })
+    .on('mined', (receipt) => {
+      console.log('Mined in block', receipt.blockNumber)
+    })
     .on('confirmations', (confirmations) => {
       console.log('confirmations', confirmations)
     })
   console.log('receipt', receipt)
+
+  // const hash = await when(TxM.submit(tx), 'transactionHash')
+  // console.log('hash', hash)
 }
 
 main()