Creating wechat voucher process with PHP

• Create wechat voucher interface document address
  https://pay.weixin.qq.com/wiki/doc/apiv3/wxpay/marketing/convention/chapter3_1.shtml

• Be careful ： All voucher interfaces must comply with api-v3 Interface rules
  api-v3 Interface rule address
  https://wechatpay-api.gitbook.io/wechatpay-api-v3/

• Signature verification rules can be downloaded from wechat PHP-SDK, There is a specific implementation
  PHP-SDK Download address
  https://pay.weixin.qq.com/wiki/doc/apiv3/wechatpay/wechatpay6_0.shtml

• Specific code （ Reference resources ）

<?php
/** *  Create wechat payment vouchers  * @param Request $request * @return \Illuminate\Http\JsonResponse * @throws \GuzzleHttp\Exception\GuzzleException */
public function createWeChatPayCashCoupon(Request $request){
    
	$requestAllData = $request->all();	

	$merchantId             = $this->merchantId;
	//  Merchant number 
	$merchantId             = $merchantId;
	//  Merchant API Certificate serial number 
	$merchantSerialNumber   = $this->serial_no;
	//  Merchants private key 
	$merchantPrivateKey     = PemUtil::loadPrivateKey($this->privateKeyPath);
	//  Wechat payment platform certificate 
	$wechatpayCertificate   = PemUtil::loadCertificate($this->weChatPayCertificateKeyPath);

	//  Construct a WechatPayMiddleware
	$wechatpayMiddleware = WechatPayMiddleware::builder()
		->withMerchant($merchantId, $merchantSerialNumber, $merchantPrivateKey) //  Incoming merchant related configuration 
		->withWechatPay([ $wechatpayCertificate ]) //  Multiple wechat payment platform certificates can be imported , Parameter type is array
		->build();

	//  take WechatPayMiddleware Add to Guzzle Of HandlerStack in 
	$stack = HandlerStack::create();
	$stack->push($wechatpayMiddleware, 'wechatpay');

	//  establish Guzzle HTTP Client when , take HandlerStack Pass in 
	$client = new Client(['handler' => $stack]);

	try {
    
		$out_request_no       = $this->getOutRequestNo();
		$available_begin_time = $this->dateTransformationTimezone($requestAllData['available_begin_time']);
		$available_end_time   = $this->dateTransformationTimezone($requestAllData['available_end_time']);

		$couponData['store_id']                 = $requestAllData['store_id'];
		$couponData['coupon_type']              = 2;
		$couponData['coupon_stock_name']        = isset($requestAllData['coupon_stock_name']) ? $requestAllData['coupon_stock_name'] : " vouchers ";
		$couponData['coupon_belong_merchant']   = $this->merchantId;
		$couponData['coupon_comment']           = isset($requestAllData['coupon_comment']) ? $requestAllData['coupon_comment'] : " vouchers ";
		$couponData['goods_name']               = " Single product use ";
		$couponData['coupon_stock_type']        = "NORMAL";
		$couponData['out_request_no']           = $out_request_no;
		$couponData['coupon_code_mode']         = "WECHATPAY_MODE";
		$couponData['available_begin_time']     = $available_begin_time;
		$couponData['available_end_time']       = $available_end_time;
		$couponData['discount_amount']          = intval($requestAllData['discount_amount']);
		$couponData['transaction_minimum']      = intval($requestAllData['transaction_minimum']);
		$couponData['use_method']               = 3;
		$couponData['max_amount']               = $requestAllData['max_coupons'] * $requestAllData['discount_amount'];
		$couponData['max_coupons']              = intval($requestAllData['max_coupons']);
		$couponData['max_coupons_per_user']     = intval($requestAllData['max_coupons_per_user']) ?? 1;

		//  For the request 
		$resp = $client->request('POST', 'https://api.mch.weixin.qq.com/v3/marketing/favor/coupon-stocks', [
			'json' => [
				'stock_name'      => $couponData['coupon_stock_name'],
				'belong_merchant' => $merchantId,
				'comment'         => $couponData['coupon_comment'],
				'available_begin_time' => $available_begin_time,
				'available_end_time' => $available_end_time,
				'stock_use_rule'     => [
					'max_coupons'  => $couponData['max_coupons'], //  Total quantity 
					'max_amount'  => $couponData['max_coupons'] * $couponData['discount_amount'], //  general budget 
					'max_coupons_per_user'  => $couponData['max_coupons_per_user'],
					'natural_person_limit'  => false,
					'prevent_api_abuse'  => false,
				],
				'coupon_use_rule' => [
					'fixed_normal_coupon' => [
						'coupon_amount'     => $couponData['discount_amount'],
						'transaction_minimum' => $couponData['transaction_minimum'],
					],
					'available_merchants' => [
						$weixinStoreInfo->wx_sub_merchant_id
					],
				],
				'no_cash' => true,
				'stock_type' => 'NORMAL',
				'out_request_no' => $out_request_no
			],
			'headers' => ['Accept' => 'application/json']
		]);
		$coupon = json_decode($resp->getBody(),true);

		if(isset($coupon['stock_id']) && !empty($coupon['stock_id'])){
    
			$couponData['stock_id']                 = $coupon['stock_id'];
			$couponData['available_begin_time']     = $requestAllData['available_begin_time'];
			$couponData['available_end_time']       = $requestAllData['available_end_time'];
			date_default_timezone_set("Asia/Shanghai");
			$couponData['created_at']               = $this->timezoneTransformationDate($coupon['create_time']);

			//  Create card data 
			$customerAppletsCouponsModel = new CustomerAppletsCoupons();

			$result = $customerAppletsCouponsModel->createCoupon($couponData);

			if($result['status'] == 200){
    
				// return $this->responseDataJson($resp->getStatusCode(),$resp->getReasonPhrase(),$coupon);
				return $this->responseDataJson(1,' Create success ',$coupon);
			}else{
    
				return $this->responseDataJson(202," Card coupon data storage failed ");
			}
		}else{
    
			return $this->responseDataJson(202," Create failure ");
		}
	} catch (RequestException $e) {
    
		$errorData = json_decode($e->getResponse()->getBody(),true);
		return $this->responseDataJson($e->getResponse()->getStatusCode(),$errorData['message'],$errorData);
	}
}