diff --git a/src/oracle/tss-sign/signer.js b/src/oracle/tss-sign/signer.js
index 69181da..39d77b4 100644
--- a/src/oracle/tss-sign/signer.js
+++ b/src/oracle/tss-sign/signer.js
@@ -116,23 +116,29 @@ async function waitForAccountNonce(address, nonce) {
   return !cancelled
 }
 
-
-function sendTx(tx) {
-  return httpClient
-    .post('/api/v1/broadcast?sync=true', tx, {
-      headers: {
-        'Content-Type': 'text/plain'
-      }
-    })
-    .catch(async (err) => {
+async function sendTx(tx) {
+  while (true) {
+    try {
+      return await httpClient
+        .post('/api/v1/broadcast?sync=true', tx, {
+          headers: {
+            'Content-Type': 'text/plain'
+          }
+        })
+    } catch (err) {
       if (err.response.data.message.includes('Tx already exists in cache')) {
         logger.debug('Tx already exists in cache')
         return true
       }
-      logger.info('Something failed, restarting: %o', err.response)
-      await delay(1000)
-      return await sendTx(tx)
-    })
+      if (err.response.data.message.includes(' < ')) {
+        logger.warn('Insufficient funds, waiting for funds to income')
+        await delay(60000)
+      } else {
+        logger.info('Something failed, restarting: %o', err.response)
+        await delay(10000)
+      }
+    }
+  }
 }
 
 function sign(keysFile, hash, tx, publicKey, signerAddress) {
diff --git a/tests/test/ethToBnc.js b/tests/test/ethToBnc.js
index 4bd5e08..4ae6ef6 100644
--- a/tests/test/ethToBnc.js
+++ b/tests/test/ethToBnc.js
@@ -7,45 +7,60 @@ const { HOME_BRIDGE_ADDRESS } = process.env
 
 const { controller1 } = require('./utils/proxyController')
 
-module.exports = (getUsers) => {
+module.exports = (getUsers, amount = 5, getBncPrefundedUser = null) => {
   describe('exchange of tokens in eth => bnc direction', function () {
     let info
     let users
     let ethBalances
     let bncBalances
     let bncBridgeSequence
+    let bncPrefundedUser
 
     before(async function () {
       users = getUsers()
       info = await controller1.getInfo()
       ethBalances = await Promise.all(users.map((user) => user.getErcBalance()))
       bncBalances = await seqMap(users, (user) => user.getBepBalance())
-
+      if (getBncPrefundedUser) {
+        bncPrefundedUser = getBncPrefundedUser()
+      }
       bncBridgeSequence = await getBncSequence(info.foreignBridgeAddress)
-      await Promise.all(users.map((user, i) => user.approveErc(HOME_BRIDGE_ADDRESS, 5 + i)))
+      await Promise.all(users.map((user, i) => user.approveErc(HOME_BRIDGE_ADDRESS, amount + i)))
     })
 
     it('should accept exchange requests', async function () {
-      await Promise.all(users.map((user, i) => user.exchangeErc(5 + i)))
+      await Promise.all(users.map((user, i) => user.exchangeErc(amount + i)))
       const newEthBalances = await Promise.all(users.map((user) => user.getErcBalance()))
       for (let i = 0; i < 3; i += 1) {
-        assert.strictEqual(newEthBalances[i], ethBalances[i] - 5 - i, `Balance of ${users[i].ethAddress} did not updated as expected`)
+        assert.strictEqual(newEthBalances[i], ethBalances[i] - amount - i, `Balance of ${users[i].ethAddress} did not updated as expected`)
       }
     })
 
-    it('should make exchange transaction on bnc side', async function () {
-      this.timeout(300000)
-      await waitPromise(
-        () => getBncSequence(info.foreignBridgeAddress),
-        (sequence) => sequence === bncBridgeSequence + 1
-      )
-    })
+    if (bncPrefundedUser) {
+      it('should make exchange transaction on bnc side with waiting for enough funds on bnc side', async function () {
+        this.timeout(300000)
+        await delay(120000)
+        await bncPrefundedUser.transferBepBnb(info.foreignBridgeAddress, amount * 3 + 10, 0)
+        await waitPromise(
+          () => getBncSequence(info.foreignBridgeAddress),
+          (sequence) => sequence === bncBridgeSequence + 1
+        )
+      })
+    } else {
+      it('should make exchange transaction on bnc side', async function () {
+        this.timeout(300000)
+        await waitPromise(
+          () => getBncSequence(info.foreignBridgeAddress),
+          (sequence) => sequence === bncBridgeSequence + 1
+        )
+      })
+    }
 
     it('should make correct exchange transaction', async function () {
       await delay(10000)
       const newBncBalances = await Promise.all(users.map((user) => user.getBepBalance()))
       for (let i = 0; i < 3; i += 1) {
-        assert.strictEqual(newBncBalances[i], bncBalances[i] + 5 + i, `Balance of ${users[i].bncAddress} did not updated as expected`)
+        assert.strictEqual(newBncBalances[i], bncBalances[i] + amount + i, `Balance of ${users[i].bncAddress} did not updated as expected`)
       }
     })
   })
diff --git a/tests/test/index.js b/tests/test/index.js
index 3acb9bb..8ae7840 100644
--- a/tests/test/index.js
+++ b/tests/test/index.js
@@ -21,6 +21,7 @@ const { controller1 } = require('./utils/proxyController')
 
 describe('bridge tests', function () {
   let users
+  let bncPrefundedUser
 
   before(async function () {
     users = await seqMap(usersConfig, (user) => createUser(user.privateKey))
@@ -29,7 +30,6 @@ describe('bridge tests', function () {
   describe('generation of initial epoch keys', function () {
     let info
     let ethPrefundedUser
-    let bncPrefundedUser
 
     before(async function () {
       ethPrefundedUser = await createUser(HOME_PRIVATE_KEY, 'eth')
@@ -99,5 +99,5 @@ describe('bridge tests', function () {
   testEthToBnc(() => users)
   testBncToEth(() => users)
   testEthToBncWithRestart(() => users, 2)
-  testEthToBnc(() => users)
+  testEthToBnc(() => users, 500, bncPrefundedUser)
 })
diff --git a/tests/test/utils/bncClient.js b/tests/test/utils/bncClient.js
index cd461fb..bd18a30 100644
--- a/tests/test/utils/bncClient.js
+++ b/tests/test/utils/bncClient.js
@@ -36,7 +36,7 @@ module.exports = async function main(privateKey) {
       await client.multiSend(from, outputs, 'funding')
     },
     async exchange(to, value) {
-      await client.transfer(from, to, value.toString(), FOREIGN_ASSET, 'exchange')
+      await client.transfer(from, to, value.toString(), FOREIGN_ASSET, '')
     }
   }
 }