title: transaction underpriced in BEP-20 Token transaction
body: <p>I had do some transaction in Binance Smart Chain in Binance-Peg BUSD-T and it worked successfully. But after 5 transactions. I face to a problem that said <code>Returned error: transaction underpriced</code> ! This is my code:</p>
  <pre><code>const web3 = new Web3('https://bsc-dataseed1.binance.org:443');
  
  const contract = new web3.eth.Contract(abi, usdtContractAddr, {
    from: 'SENDER_ADDRESS', // default from address
    gasPrice: '200000000' // default gas price in wei, 20 gwei in this case
  });
  
  web3.eth.accounts.wallet.add('SENDER_PRIVATE_KEY');
  const receipt = await contract.methods.transfer('TO_ADDRESS', '1000000000000000000').send({
      from: 'SENDER_ADDRESS',
      gas: 100000
  });
  </code></pre>
  <p>I have increased my gas 10% and add a nonce more than the value which was given to me by calling
  <code>web3.eth.getTransactionCount('ADDRESS')</code>. But non of them works. I used to do a lot of transactions in Binance-Peg BUSD-T and so it is a big problem for me. Is there a way to solve this problem ???</p>