初始化项目：添加后端代码、ThinkPHP框架、前端资源

extend/Yansongda/Pay/Events/ApiRequested.php

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+<?php
+
+namespace Yansongda\Pay\Events;
+
+class ApiRequested extends Event
+{
+    /**
+     * Endpoint.
+     *
+     * @var string
+     */
+    public $endpoint;
+
+    /**
+     * Result.
+     *
+     * @var array
+     */
+    public $result;
+
+    /**
+     * Bootstrap.
+     */
+    public function __construct(string $driver, string $gateway, string $endpoint, array $result)
+    {
+        $this->endpoint = $endpoint;
+        $this->result = $result;
+
+        parent::__construct($driver, $gateway);
+    }
+}

extend/Yansongda/Pay/Events/ApiRequesting.php

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+<?php
+
+namespace Yansongda\Pay\Events;
+
+class ApiRequesting extends Event
+{
+    /**
+     * Endpoint.
+     *
+     * @var string
+     */
+    public $endpoint;
+
+    /**
+     * Payload.
+     *
+     * @var array
+     */
+    public $payload;
+
+    /**
+     * Bootstrap.
+     */
+    public function __construct(string $driver, string $gateway, string $endpoint, array $payload)
+    {
+        $this->endpoint = $endpoint;
+        $this->payload = $payload;
+
+        parent::__construct($driver, $gateway);
+    }
+}

extend/Yansongda/Pay/Events/Event.php

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+<?php
+
+namespace Yansongda\Pay\Events;
+
+use Symfony\Contracts\EventDispatcher\Event as SymfonyEvent;
+
+class Event extends SymfonyEvent
+{
+    /**
+     * Driver.
+     *
+     * @var string
+     */
+    public $driver;
+
+    /**
+     * Method.
+     *
+     * @var string
+     */
+    public $gateway;
+
+    /**
+     * Extra attributes.
+     *
+     * @var mixed
+     */
+    public $attributes;
+
+    /**
+     * Bootstrap.
+     *
+     * @author yansongda <me@yansongda.cn>
+     */
+    public function __construct(string $driver, string $gateway)
+    {
+        $this->driver = $driver;
+        $this->gateway = $gateway;
+    }
+}

extend/Yansongda/Pay/Events/MethodCalled.php

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+<?php
+
+namespace Yansongda\Pay\Events;
+
+class MethodCalled extends Event
+{
+    /**
+     * endpoint.
+     *
+     * @var string
+     */
+    public $endpoint;
+
+    /**
+     * payload.
+     *
+     * @var array
+     */
+    public $payload;
+
+    /**
+     * Bootstrap.
+     *
+     * @author yansongda <me@yansongda.cn>
+     */
+    public function __construct(string $driver, string $gateway, string $endpoint, array $payload = [])
+    {
+        $this->endpoint = $endpoint;
+        $this->payload = $payload;
+
+        parent::__construct($driver, $gateway);
+    }
+}

extend/Yansongda/Pay/Events/PayStarted.php

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+<?php
+
+namespace Yansongda\Pay\Events;
+
+class PayStarted extends Event
+{
+    /**
+     * Endpoint.
+     *
+     * @var string
+     */
+    public $endpoint;
+
+    /**
+     * Payload.
+     *
+     * @var array
+     */
+    public $payload;
+
+    /**
+     * Bootstrap.
+     */
+    public function __construct(string $driver, string $gateway, string $endpoint, array $payload)
+    {
+        $this->endpoint = $endpoint;
+        $this->payload = $payload;
+
+        parent::__construct($driver, $gateway);
+    }
+}

extend/Yansongda/Pay/Events/PayStarting.php

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+<?php
+
+namespace Yansongda\Pay\Events;
+
+class PayStarting extends Event
+{
+    /**
+     * Params.
+     *
+     * @var array
+     */
+    public $params;
+
+    /**
+     * Bootstrap.
+     */
+    public function __construct(string $driver, string $gateway, array $params)
+    {
+        $this->params = $params;
+
+        parent::__construct($driver, $gateway);
+    }
+}

extend/Yansongda/Pay/Events/RequestReceived.php

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+<?php
+
+namespace Yansongda\Pay\Events;
+
+class RequestReceived extends Event
+{
+    /**
+     * Received data.
+     *
+     * @var array
+     */
+    public $data;
+
+    /**
+     * Bootstrap.
+     *
+     * @author yansongda <me@yansongda.cn>
+     */
+    public function __construct(string $driver, string $gateway, array $data)
+    {
+        $this->data = $data;
+
+        parent::__construct($driver, $gateway);
+    }
+}

extend/Yansongda/Pay/Events/SignFailed.php

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+<?php
+
+namespace Yansongda\Pay\Events;
+
+class SignFailed extends Event
+{
+    /**
+     * Received data.
+     *
+     * @var array
+     */
+    public $data;
+
+    /**
+     * Bootstrap.
+     *
+     * @author yansongda <me@yansongda.cn>
+     */
+    public function __construct(string $driver, string $gateway, array $data)
+    {
+        $this->data = $data;
+
+        parent::__construct($driver, $gateway);
+    }
+}