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payBill.php
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payBill.php
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<?php
ob_start();
session_start();
include_once 'doeconnect.php';
require __DIR__ . '/vendor/autoload.php';
use ZuluCrypto\StellarSdk\Keypair;
use ZuluCrypto\StellarSdk\Server;
use ZuluCrypto\StellarSdk\XdrModel\Asset;
use ZuluCrypto\StellarSdk\XdrModel\AccountId;
use ZuluCrypto\StellarSdk\XdrModel\Operation\SetOptionsOp;
if(isset($_POST['btn-pay']))
{
//retrieve source,destination,amount
$destname = $_SESSION['username'];
$sourcename = $_POST['destination'];
$amount = $_POST['amount'];
//interaction with db
$query1 = "SELECT Publickey,Seed FROM Users where Username like '$sourcename'";
$query2 = "SELECT Publickey,Seed FROM Users where Username like '$destname'";
$result1 = mysqli_query($conn,$query1);
$result2 = mysqli_query($conn,$query2);
$row1 = mysqli_fetch_array($result1);
$row2 = mysqli_fetch_array($result2);
$sourcePublickey = $row1['Publickey'];
$sourceSeed = $row1['Seed'];
$destPublickey = $row2['Publickey'];
$destSeed = $row2['Seed'];
//speak to stellar and get keypair
$sourceKeypair = Keypair::newFromSeed($sourceSeed);
$receivingKeypair = Keypair::newFromSeed($destSeed);
//Asset initialisation
$asset = new Asset(Asset::TYPE_ALPHANUM_12);
$asset->setAssetCode("DOECredits");
$issuer = new AccountId('GBLJGGNZB7GTTC2D2AZ3HPAAIO4CQMES442C4OEI6PDZFRG4MBQL6ZOS');
$asset->setIssuer($issuer);
//server start
$server = Server::testNet();
//build transaction
$txEnvelope = $server->buildTransaction($sourceKeypair)
->addCustomAssetPaymentOp($asset, $amount, $receivingKeypair->getPublicKey())
->getTransactionEnvelope();
//source signs transaction
$txEnvelope->sign($sourceKeypair);
//encode transaction
$b64Tx = base64_encode($txEnvelope->toXdr());
//submit transaction
$transaction = $server->submitB64Transaction($b64Tx);
$transactionID = $transaction->getTransactionHash();
//insert into database transactions
$query3 = "Select ID from Users where Username like '$sourcename'";
$query4 = "Select ID from Users where Username like '$destname'";
$result3 = mysqli_query($conn,$query3);
$result4 = mysqli_query($conn,$query4);
$row3 = mysqli_fetch_array($result3);
$row4 = mysqli_fetch_array($result4);
$sourceID = $row3['ID'];
$destID = $row4['ID'];
$query5 = "INSERT INTO Transactions(TransactionID,SourceID,DestinationID,Amount)
VALUES('$transactionID','$sourceID','$destID','$amount')";
$result5 = mysqli_query($conn,$query5);
if(!result5)
{
echo "Error : Failed to execute query";
}
//get DOE publickey,seed
$query6 = "SELECT Publickey,Seed from Users where Username like 'DOE'";
$result6 = mysqli_query($conn,$query6);
$row6 = mysqli_fetch_array($result6);
$doePublickey = $row6['Publickey'];
$doeSeed = $row6['Seed'];
//get DOE keypair
$doeKeypair = Keypair::newFromSeed($doeSeed);
//calculate compensation
$compensation = 0.01 * $amount;
//new transactions where source = merchant, destination = DOE
$txEnvelope = $server->buildTransaction($receivingKeypair)
->addCustomAssetPaymentOp($asset, $compensation, $doeKeypair->getPublicKey())
->getTransactionEnvelope();
//source signs transaction
$txEnvelope->sign($receivingKeypair);
//encode transaction
$b64Tx = base64_encode($txEnvelope->toXdr());
//submit transaction
$transaction = $server->submitB64Transaction($b64Tx);
$transactionID = $transaction->getTransactionHash();
//interact with db, insert into transactions table
$query3 = "Select ID from Users where Username like '$destname'";
$query4 = "Select ID from Users where Username like 'DOE'";
$result3 = mysqli_query($conn,$query3);
$result4 = mysqli_query($conn,$query4);
$row3 = mysqli_fetch_array($result3);
$row4 = mysqli_fetch_array($result4);
$sourceID = $row3['ID'];
$destID = $row4['ID'];
$query5 = "INSERT INTO Transactions(TransactionID,SourceID,DestinationID,Amount)
VALUES('$transactionID','$sourceID','$destID','$compensation')";
$result5 = mysqli_query($conn,$query5);
}
if(isset($_POST['btn-back']))
{
header("Location: merchantHome.php");
}
?>
<!DOCTYPE HTML>
<html>
<head>
<title>Home</title>
<link rel="stylesheet" href="CSS/Form.css" type="text/css"/>
</head>
<body background="CSS/thumb-1920-840086.jpg">
<div class="login-page">
<div class="form">
<form method="post" class="login-form" action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']); ?>" autocomplete="off">
<a class="message">BILL</a>
<br>
<br>
<input type="text" class="form-control" name="amount" placeholder="Enter Amount">
<br>
<input type="text" class="form-control" name="destination" placeholder="Enter Customer Name">
<br><br>
<button type="submit" class="btn btn-block btn-primary" name="btn-pay">Pay</button>
<br><br>
<button type="submit" class="btn btn-block btn-primary" name="btn-back">Back</button>
</form>
</div>
</div>
</body>
</html>