neiyou_user_web/app/Http/Controllers/Gateway/AbstractPayment.php

<?php

namespace App\Http\Controllers\Gateway;

use App\Models\Payment;
use App\Models\PaymentCallback;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Str;

abstract class AbstractPayment {
	abstract public function purchase(Request $request): JsonResponse;

	abstract public function notify(Request $request): void;

	protected function creatNewPayment($uid, $oid, $amount): Payment {
		$payment = new Payment();
		$payment->trade_no = Str::random(8);
		$payment->user_id = $uid;
		$payment->order_id = $oid;
		$payment->amount = $amount;
		$payment->save();

		return $payment;
	}

	/**
	 * @param  string  $trade_no      本地订单号
	 * @param  string  $out_trade_no  外部订单号
	 * @param  int     $amount        交易金额
	 * @return int
	 */
	protected function addPamentCallback($trade_no, $out_trade_no, $amount): int {
		$log = new PaymentCallback();
		$log->trade_no = $trade_no;
		$log->out_trade_no = $out_trade_no;
		$log->amount = $amount;

		return $log->save();
	}

	// MD5验签
	protected function verify($data, $key, $signature, $filter = true): bool {
		return hash_equals($this->aliStyleSign($data, $key, $filter), $signature);
	}

	/**
	 *  Alipay式数据MD5签名
	 * @param  array    $data    需要加密的数组
	 * @param  string   $key     尾部的密钥
	 * @param  boolean  $filter  是否清理空值
	 * @return string md5加密后的数据
	 */
	protected function aliStyleSign($data, $key, $filter = true): string {
		// 剃离sign，sign_type，空值
		unset($data['sign'], $data['sign_type']);
		if($filter){
			$data = array_filter($data);
		}

		// 排序
		ksort($data, SORT_STRING);
		reset($data);

		return md5(urldecode(http_build_query($data)).$key);
	}
}