转账功能优化
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Dev
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<?php
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namespace app\common\service;
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use app\common\model\account\TransferAuthorizations;
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use app\common\traits\ServiceTrait;
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use think\Log;
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/**
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* 免确认收款授权（商家转账-用户确认模式的前置授权）
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* 流程：
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* 1. 用户发起提现时，前端调本服务 apply() 发起授权申请，
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* 拿到 package_info 后用 wx.requestMerchantTransfer 拉起授权页；
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* 2. 用户授权成功后，微信异步回调 transferAuthorizationNotify，
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* 本服务记录 authorization_id 并将状态置为 TAKING_EFFECT；
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* 3. 后台审核提现时，校验授权为 TAKING_EFFECT 后走
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* /v3/fund-app/mch-transfer/transfer-bills/transfer 完成免确认转账。
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* 文档：https://pay.weixin.qq.com/doc/v3/merchant/4015901167
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*/
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class TransferAuthorizationService
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{
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use ServiceTrait;
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/** @var TransferAuthorizations */
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public static $Model = TransferAuthorizations::class;
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// 授权状态
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const STATE_WAIT_USER_CONFIRM = 'WAIT_USER_CONFIRM'; //已受理，待用户确认
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const STATE_TAKING_EFFECT = 'TAKING_EFFECT'; //已授权，生效中（长期有效，直至主动解除）
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/**
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* 生成商户侧授权单号：一个用户固定一个单号。
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* 微信规则：未确认的授权单 30 天后单号可复用重新发起，因此复用同一单号即可
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* @param int $userId
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* @return string 仅含字母数字，最长 32 位
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*/
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public static function generateAuthNo($userId): string
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{
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return 'TXAUTH' . str_pad((string)intval($userId), 10, '0', STR_PAD_LEFT);
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}
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/**
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* 获取用户的授权记录
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* @param int $userId
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* @return TransferAuthorizations|null
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*/
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public static function getByUserId($userId)
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{
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return self::getOne(['user_id' => $userId]);
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}
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/**
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* 用户是否已完成免确认收款授权
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* @param int $userId
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* @return bool
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*/
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public static function isAuthorized($userId): bool
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{
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$record = self::getByUserId($userId);
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return $record
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&& $record->state == self::STATE_TAKING_EFFECT
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&& $record->authorization_id;
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}
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/**
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* 发起/获取免确认收款授权，供前端拉起授权页
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* @param \app\common\model\Users $user 用户（需含 openid）
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* @param string $displayName 授权详情中展示的开通账号名称
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* @return array {authorized: bool, state, package_info?, mch_id?, app_id?}
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* @throws \Exception
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*/
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public static function apply($user, string $displayName = ''): array
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{
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$userId = $user->id;
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if (empty($user->openid)) {
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throw new \Exception('无法获取用户微信身份，请先登录小程序');
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}
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//已授权的用户直接返回，不再重复发起
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$record = self::getByUserId($userId);
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if ($record && self::isAuthorized($userId)) {
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return [
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'authorized' => true,
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'state' => $record->state,
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];
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}
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//发起授权申请（授权单号固定，复用同一单号可重新发起）
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$authNo = self::generateAuthNo($userId);
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$wechat = new EasyWeChatService();
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$displayName = mb_substr($displayName ?: ($user->nickname ?: ('用户' . $userId)), 0, 32);
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$res = $wechat->applyTransferAuthorization($authNo, $user->openid, $displayName);
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if (empty($res['package_info'])) {
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throw new \Exception($res['message'] ?? '发起免确认收款授权失败');
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}
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//保存/更新授权记录（package_info 用于前端拉起授权页，state 当前为待用户确认）
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$data = [
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'state' => $res['state'] ?? self::STATE_WAIT_USER_CONFIRM,
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'package_info' => $res['package_info'],
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];
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if ($record) {
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$record->save($data);
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} else {
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self::create(array_merge([
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'user_id' => $userId,
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'out_authorization_no' => $authNo,
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'authorization_id' => '',
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], $data));
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}
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return [
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'authorized' => false,
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'state' => $data['state'],
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'package_info' => $res['package_info'],
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//前端 wx.requestMerchantTransfer 需要：商户号 + AppID + package
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'mch_id' => (string)$wechat->payApp->getMerchant()->getMerchantId(),
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'app_id' => $wechat->config['app_id'],
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];
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}
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/**
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* 处理免确认收款授权结果回调（用户授权成功后微信异步通知）
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* @param array $message 解密后的授权结果，含 out_authorization_no / authorization_id / state
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* @return bool
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*/
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public static function handleAuthorizationNotify(array $message): bool
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{
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$outAuthNo = trim((string)($message['out_authorization_no'] ?? ''));
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$authorizationId = trim((string)($message['authorization_id'] ?? ''));
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$state = trim((string)($message['state'] ?? ''));
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if (!$outAuthNo || !$authorizationId) {
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Log::error('免确认收款授权回调参数缺失:' . json_encode($message, JSON_UNESCAPED_UNICODE));
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return false;
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}
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$record = self::getOne(['out_authorization_no' => $outAuthNo]);
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if (!$record) {
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Log::error('免确认收款授权回调找不到授权记录:' . $outAuthNo);
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return false;
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}
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//记录微信侧授权单号，标记授权生效（授权长期有效，直至用户或商户主动解除）
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$record->authorization_id = $authorizationId;
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$record->state = $state ?: self::STATE_TAKING_EFFECT;
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$record->save();
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Log::info('免确认收款授权生效:' . json_encode([
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'user_id' => $record->user_id,
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'state' => $record->state,
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], JSON_UNESCAPED_UNICODE));
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return true;
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}
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}
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