code: function cloneTxParams(txParams){
    return {
      from: txParams.from,
      to: txParams.to,
      value: txParams.value,
      data: txParams.data,
      gas: txParams.gas,
      gasPrice: txParams.gasPrice,
      nonce: txParams.nonce,
    }
  }
docs: util we use this to clean any custom params from the txParams