支付凭证优化

backend/application/common/service/EasyWeChatService.php

@@ -31,6 +31,8 @@ class EasyWeChatService
         $this->app = new MiniAppApplication([
             'app_id' => $this->config['app_id'],
             'secret' => $this->config['secret'],
+            // 稳定版凭证重复获取不会把上一张作废。旧接口并发刷新会返回 40001
+            'use_stable_access_token' => true,
             'http'  => ['throw' => false, 'timeout' => 10.0],
         ]);
 
@@ -46,6 +48,24 @@ class EasyWeChatService
         ]);
     }
 
+    /**
+     * 刷新小程序 access_token。普通刷新不会使有效凭证失效；force 只在微信返回凭证无效时使用
+     * @param bool $force
+     * @return string
+     */
+    public function refreshMiniAccessToken($force = false)
+    {
+        $accessToken = $this->app->getAccessToken();
+        if ($force && method_exists($accessToken, 'getStableAccessToken')) {
+            return $accessToken->getStableAccessToken(true);
+        }
+        if ($accessToken instanceof \EasyWeChat\Kernel\Contracts\RefreshableAccessToken) {
+            return $accessToken->refresh();
+        }
+
+        return '';
+    }
+
     /**
      * 小程序登录(code2session)
      * @param string $code wx.login 获取的 code