setup-merchant-credentials.php

$data = [
	// string - Merchant Name for Payment Screen
	'merchant_name' => "Wave Merchant",

	// string - Merchant id provided by Wave Money
	'merchant_id' => "wavemerchant",

        // unsigned integer - Time to live for Transaction (seconds)
        'timeToLiveSeconds' => 300,

	// unsigned integer - Order id provided Merchant
	'order_id' => rand(1000000, 9999999),

	// unsigned integer - Total Amount of transaction
	'amount' => 50,

	// string - mendatory backend url for Payment Service
	'backend_result_url' => "https://wave-merchant.com/backend-callback",

	// string - mendatory frontend url for Payment Service
	'frontend_result_url' => "https://wave-merchant.com",

	// string - Unique Merchant Reference ID for Transaction
	'merchant_reference_id' => "wavemerchant-" . rand(1000000, 9999999),

	// string - Payment Description for Payment Screen from Merchant
	'payment_description' => "Buying things from Wave Merchant"
];

// Secret Key provided by Wave Money
$secret_key = "w2u";