Error: PollingBlockTracker - encountered an error while attempting to update latest block:

[BlockchainsFans]

• [ ] I've asked for help in the Truffle Gitter before filing this issue.

---

Issue

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Steps to Reproduce

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Expected Behavior

What you expected to happen.

Actual Results

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Environment

• Operating System:
• Ethereum client:
• Truffle version (truffle version):
• node version (node --version):
• npm version (npm --version):

[eggplantzzz]

Closing this as a duplicate of issue #3356

[umobiajulu]

I had the sam issue with BSC testnet. I solved mine by replacing 'https' in the provider url with 'wss'

testnet: {
  provider: () => new HDWalletProvider(mnemonic, `wss://data-seed-prebsc-1-s1.binance.org:8545`),
  network_id: 97,
  confirmations: 10,
  timeoutBlocks: 200,
  skipDryRun: true
},

[rafante]

If it helps, I had the exact same error. I could deploy on any ethereum environment, but couldn't deploy on Polygon (neither mumbai or the mainet). When I tried with this https://rpc-mumbai.maticvigil.com/ instead of this https://rpc-mumbai.matic.today, it worked.

Hope it helped!

[amit221]

I had the sam issue with BSC testnet. I solved mine by replacing 'https' in the provider url with 'wss'

testnet: {
  provider: () => new HDWalletProvider(mnemonic, `wss://data-seed-prebsc-1-s1.binance.org:8545`),
  network_id: 97,
  confirmations: 10,
  timeoutBlocks: 200,
  skipDryRun: true
},

works like a charm

[racetrack0616]

If it helps, I had the exact same error. I could deploy on any ethereum environment, but couldn't deploy on Polygon (neither mumbai or the mainet). When I tried with this https://rpc-mumbai.maticvigil.com/ instead of this https://rpc-mumbai.matic.today, it worked.

Hope it helped!

I am having the same issue in matic testnet. I tried this solution but now,

  code: -32603,
  message: 'Too Many Requests',
  data: { originalError: {} },
  stack: 'Error: Too Many Requests\n' +```

[nelsoncerqueira]

If it helps, I had the exact same error. I could deploy on any ethereum environment, but couldn't deploy on Polygon (neither mumbai or the mainet). When I tried with this https://rpc-mumbai.maticvigil.com/ instead of this https://rpc-mumbai.matic.today, it worked. Hope it helped!

I am having the same issue in matic testnet. I tried this solution but now,

  code: -32603,
  message: 'Too Many Requests',
  data: { originalError: {} },
  stack: 'Error: Too Many Requests\n' +```

I get the same

[racetrack0616]

Nothing is actually working for me. Most of time I get TIMEDOUT issue now.

[umobiajulu]

I later found out that the major cause of this problem is unstable network. your ip changes in the middle of deploying the contract. the solution is to use a stable network or use a vpn which will stabilize your network. in my case I used proton vpn and everything worked perfectly

[racetrack0616]

Thank you for your response. I used https://rpc-mumbai.maticvigil.com URL and used proton vpn but now the issue is

[racetrack0616]

The other issue is as in screenshot . It is so frustrating now. I can't get rid of it. :(. I am using vpn though.

[wpitallo]

Please reopen this issue...

[web3dev6]

Try this Matic testnet url:

https://matic-mumbai.chainstacklabs.com/

Worked for me!

[Oskii]

Try this Matic testnet url:

https://matic-mumbai.chainstacklabs.com/

Worked for me!

This URL did not work for me - same issue.

[Fahad67]

I had same issue but resolve it by using speedy node testnet url.

https://speedy-nodes-nyc.moralis.io/*****.......*****/bsc/testnet

[xxycfhb]

I had the sam issue with BSC testnet. I solved mine by replacing 'https' in the provider url with 'wss'

testnet: {
  provider: () => new HDWalletProvider(mnemonic, `wss://data-seed-prebsc-1-s1.binance.org:8545`),
  network_id: 97,
  confirmations: 10,
  timeoutBlocks: 200,
  skipDryRun: true
},

works like a charm

Amazing! It worked for me.

[Wwjian-lab]

I had the sam issue with BSC testnet. I solved mine by replacing 'https' in the provider url with 'wss'

testnet: {
  provider: () => new HDWalletProvider(mnemonic, `wss://data-seed-prebsc-1-s1.binance.org:8545`),
  network_id: 97,
  confirmations: 10,
  timeoutBlocks: 200,
  skipDryRun: true
},

It worked for me.Thx

[OnahProsperity]

I had the same issue with BSC testnet. I solved mine by replacing 'https' in the provider url with 'wss' worked a t a point but after few days it stopped working so i had to migrate using this:

truffle deploy --network testnet --reset --compile-none

testnet: { provider: () => new HDWalletProvider(mnemonic, https://data-seed-prebsc-1-s1.binance.org:8545), network_id: 97, confirmations: 10, timeoutBlocks: 200, skipDryRun: true },

worked for me

[barhouum7]

I've started seeing the exact same ETIMEDOUT error when deploying my Smart Contract on Goerli Testnet, and using Alchemy as my node provider.

And I was able to fix it by simply replacing https in my node provider URL with wss For example:

https://eth-goerli.alchemyapi.io/v2/${process.env.ALCHEMY_API_KEY} // Url to an Ethereum Node

To >>>

wss://eth-goerli.alchemyapi.io/v2/${process.env.ALCHEMY_API_KEY} // Url to an Ethereum Node

goerli: {
      provider: function () {
        return new HDWalletProvider(
          privateKeys.split(','), // Array of account private keys
          `wss://eth-goerli.alchemyapi.io/v2/${process.env.ALCHEMY_API_KEY}`// Url to an Ethereum Node
        )
      },
      gas: 5000000,
      gasPrice: 25000000000,
      network_id: 5,
      skipDryRun: true,
      confirmations: 10,
      networkCheckTimeout: 1000000,
      websocket: true,
      timeoutBlocks: 90000
    }

[jstaszynskidev]

Try this Matic testnet url:

https://matic-mumbai.chainstacklabs.com/

Worked for me!

This URL did not work for me - same issue.

This network URL must be the same as you have in MetaMask (New RPC URL)

[lam268]

Any updates on this problem ? I still got this error sometimes when running my application on bsc testnet

[anisurrahman072]

Hey I have solved finally ✌️🎉

I didn't use truffle HD Wallet anymore as it gave me a lot of pain 😞. Finally, I used the core etherium web3.js for everything like provider instance creation, wallet selection, pay gass, everything. I used core etherium library https://github.com/ethereum/solc-js for the ABI (Application Binary Interface) & bytecode generation.

Use Etherium Solc-js as it is official library of etherium team & it has all the feature what truffle has 💪

I used Alchemy for my Polygon mumbai test-network Node communication. Wolla, that's it. Here is the code that will help you:

const web3 = new Web3(
    new Web3.providers.HttpProvider(
      "https://polygon-mumbai.g.alchemy.com/v2/<Alchemy-API-key>"
    )
  );
  // Creating a signing account from a private key
  const signer = web3.eth.accounts.privateKeyToAccount(
    <Your Account Private key that will be used as the signer>
  );
  web3.eth.accounts.wallet.add(signer);

  // deploying our contract
  const result = await new web3.eth.Contract(
    contracts["MyContract.sol"]["MyContract"].abi,
    null,
    {
      transactionBlockTimeout: 200,
      transactionConfirmationBlocks: 1000,
      transactionPollingTimeout: 1000,
      blockHeaderTimeout: 100,
    }
  )
    .deploy({
      data: contracts["MyContract.sol"]["MyContract"].evm.bytecode.object,
    })
    .send({
      gas: "5000000",
      from: <Account public address that will pay the gass>,
    });

[Raviprakash-B]

Error [ERR_UNHANDLED_ERROR]: Unhandled error. ({mpt #1 code: -32603, message: 'ESOCKETTIMEDOUT', data: { originalError: { code: 'ESOCKETTIMEDOUT', connect: false } }, stack: 'Error: ESOCKETTIMEDOUT\n' + ' at ClientRequest. (C:\Users\Admin\Desktop\defi-staking-app-starter\defi-staking-app-starter\ \node_modules\request\request.js:816:19)\n' + ' at Object.onceWrapper (node:events:627:28)\n' +

If anyone is facing the above error to run with Matic Network Solution: - Try to change the actual Provider URL, take out from the mentioned website https://rpc.maticvigil.com/apps/a712bb661daef11c93ef89af396c476dbed54a83

then run using truffle migrate --network matic

This Worked for me..

[Eh1Ka6]

Hey dears! had this problem happening this morning: compiling the contract first with t truffle compile --all and then migrating with truffle migrate --compile-none allowed me to solve this issue.

Found the answer on this forum: https://forum.moralis.io/t/client-network-socket-disconnected-before-secure-tls-connection-was-established/9526

[musicat1020]

Run npx truffle migrate --network goerli instead of truffle migrate --network goerli This Worked for me.