ethereum transaction template

https://ethereum.stackexchange.com/questions/50042/why-does-sendsignedtransaction-return-a-tx-hash-but-does-not-post-to-the-rinkeby

  
window.web3 = new Web3(new Web3.providers.HttpProvider(endpoint));  
  
sendEther() {  
    const fromAccount = **acct1**;  
    const toAccount   = **acct2**;  
  
    const rawTransaction    = this.makeRawTransaction(fromAccount, toAccount);  
    const signedTransaction = this.makeSignedTransaction(rawTransaction);  
    const serializedTransaction = `0x${signedTransaction.serialize().toString('hex')}`;  
  
    window.web3.eth.sendSignedTransaction(serializedTransaction, (error, result) => {  
        if(!error) {  
          console.log(`Transaction hash is: ${result}`);  
          this.setState({  
            etherscanUrl: `https://rinkeby.etherscan.io/tx/${result}`,  
            error: null  
          });  
  
        } else {  
          this.setState({ error: error.message })  
          console.error(error);  
        }  
    });  
  }  
  
  makeSignedTransaction(rawTransaction) {  
    const privateKey   = '**************';  
    const privateKeyX  = new Buffer(privateKey, 'hex');  
    const transaction  = new EthTx(rawTransaction);  
    transaction.sign(privateKeyX);  
  
    return transaction;  
  }  
  
  makeRawTransaction(fromAccount, toAccount) {  
    const { exchangeRate } = this.props;  
    const amount = (1 / exchangeRate) * 5;  
  
    return ({  
      nonce: window.web3.utils.toHex(window.web3.eth.getTransactionCount(fromAccount)),  
      to: toAccount,  
      gasPrice: window.web3.utils.toHex(100000000000),  
      gasLimit: window.web3.utils.toHex(100000),  
      value: window.web3.utils.toHex(window.web3.utils.toWei(`${amount}`, 'ether')),  
      data: ''  
    });  
  }