I really need help sending ETH via PHP

[mrpmorris]

Hi all

I have the following code.

require 'vendor/autoload.php';
use Web3\Web3;
use Web3p\EthereumTx\EIP1559Transaction;
 
$web3 = new Web3('https://eth-rinkeby.alchemyapi.io/v2/--api--');
 
$fromAddress = '0xB5A2FD09ed2Eb7AA3bBf55C7f8e8D8576B68b0F2';
$toAddress = '0x2928C5Fb489BE1182B3569a3863F1C61Cafde240';
$prvKey   = '--private-key--';
$transactionAmount = 145;
 
 
$gasLimit = 0;
$baseFeePerGas = 0;
$gasUsed = 0;
$maxFeePerGas = 0;
$estimatedGas = 0;
 
 
$web3->eth->getBlockByNumber('pending',false,function($err,$success){
    if ($err !== null) {
      echo 'Error: ' . $err->getMessage();
      exit;
    }
    global $gasLimit;
    global $baseFeePerGas;
    global $gasUsed;
    
    $gasLimit = $success->gasLimit;
    $baseFeePerGas = $success->baseFeePerGas;
    $gasUsed = $success->gasUsed;
   
});
 
$estimateGasRequest = [
    'from' => $fromAddress,
    'to' => $toAddress,
    'value' => $transactionAmount
];

$web3->eth->estimateGas($estimateGasRequest,function($err,$success){
    if ($err !== null) {
      echo 'Error: ' . $err->getMessage();
      exit;
    }   
    global $estimatedGas;
    $estimatedGas = $success->value;
});
 
echo $gasLimit; // Outputs 0x1c8debe
echo '<br/>';
echo $baseFeePerGas; // Outputs 0x8
echo '<br/>';
echo $gasUsed; // Outputs 0x1c8bb1d
echo '<br/>';
echo $estimatedGas; // Outputs 21000
echo '<br/>';

 

I am struggling to understand how I can use the retrieved values in order to fill out the required values for a transaction.

Can someone help me to understand how I can calculate the values marked ?????? in the source code shown?

$gweiFactor = 1 / 1000000000;
$nonce = '113';

// generate transaction instance with transaction parameters
$transactionInfo = [
    'gas' => ??????,
    'maxPriorityFeePerGas' => ??????,
    'maxFeePerGas' => ??????,
    'nonce' => '0x' . dechex($nonce),
    'from' => $fromAddress,
    'to' => $toAddress,
    'value' => '0x' . dechex($transactionAmount),
    'chainId' => 4, // required
    'accessList' => [],
    'data' => ''
]);

 

I tried with some hard-coded values that eth-rinkeby.alchemyapi.io seemed to accept (and give me a transaction hash) but the transaction never appears on the test net or actually transfers any eth.

 

Can anyone help?

[gizmola]

What specific component libraries are you using?