diff --git a/app.js b/app.js
index 28a9d8c..cd121ce 100644
--- a/app.js
+++ b/app.js
@@ -1 +1 @@
-module.exports = require('./src/index')
+module.exports = require('./src/server')
diff --git a/src/healthWatcher.js b/src/healthWatcher.js
index b39e0d8..d6c2917 100644
--- a/src/healthWatcher.js
+++ b/src/healthWatcher.js
@@ -1,4 +1,4 @@
-const { setSafeInterval, toBN, fromWei } = require('./utils')
+const { setSafeInterval, toBN, fromWei, RelayerError } = require('./utils')
 const { privateKey, minimumBalance } = require('./config')
 const { redis } = require('./modules/redis')
 const web3 = require('./modules/web3')()
@@ -14,7 +14,7 @@ async function main() {
       throw new Error('Too many errors on relayer')
     }
     if (toBN(balance).lt(toBN(minimumBalance))) {
-      throw new Error(`Not enough balance, less than ${fromWei(minimumBalance)} ETH`)
+      throw new RelayerError(`Not enough balance, less than ${fromWei(minimumBalance)} ETH`, 1)
     }
 
     await redis.hset('health', { status: true, error: '' })
diff --git a/src/worker.js b/src/worker.js
index 6e5fb59..fb722f5 100644
--- a/src/worker.js
+++ b/src/worker.js
@@ -106,7 +106,11 @@ async function start() {
     queue.process(processJob)
     console.log('Worker started')
   } catch (e) {
-    redis.zadd('errors', new Date().getTime(), e.message)
+    if (e instanceof RelayerError) {
+      if (e.score > 0) redis.zadd('errors', e.score, e.message)
+    } else {
+      redis.zadd('errors', 1, e.message)
+    }
     console.error('error on start worker', e.message)
   }
 }
@@ -187,9 +191,9 @@ async function checkMiningFee({ args }) {
   const serviceFeePercent = isMiningReward
     ? toBN(0)
     : toBN(args.amount)
-        .sub(providedFee) // args.amount includes fee
-        .mul(toBN(parseInt(miningServiceFee * 1e10)))
-        .div(toBN(1e10 * 100))
+      .sub(providedFee) // args.amount includes fee
+      .mul(toBN(parseInt(miningServiceFee * 1e10)))
+      .div(toBN(1e10 * 100))
   /* eslint-enable */
   const desiredFee = expenseInPoints.add(serviceFeePercent) // in points
   console.log(
@@ -199,7 +203,7 @@ async function checkMiningFee({ args }) {
     serviceFeePercent.toString(),
   )
   if (toBN(providedFee).lt(desiredFee)) {
-    throw new Error('Provided fee is not enough. Probably it is a Gas Price spike, try to resubmit.')
+    throw new RelayerError('Provided fee is not enough. Probably it is a Gas Price spike, try to resubmit.')
   }
 }
 
@@ -277,7 +281,7 @@ async function processJob(job) {
   } catch (e) {
     console.error('processJob', e.message)
     await updateStatus(status.FAILED)
-    throw e
+    throw new RelayerError(e.message)
   }
 }