Question

我已经在PHP中创建了一个功能齐全的Coinbase API系统，用于我自己的目的。但是，系统中有一部分无法正常运行：市场订单。

下面显示的代码是面向对象系统中发生的步骤的再现。我认为线性代码在这个论坛中比在挖掘继承层更容易进行故障排除。

Coinbase API返回错误消息，如此处代码底部的注释文本中所示。价格＆＃39; ＆＃39;市场＆＃39;不需要参数。订单API，在此处描述：Coinbase Exchange API Documentation。当我通过添加请求的字段来响应错误消息时，订单最终会成功，但订单将作为“限制”处理。订购而不是市场＆＃39;按类型指示的顺序。

你能发现我犯的错误吗？

<?php
$settings = \parse_ini_file("API.ini", true);

$apiSecret = $settings['trader_sandbox']['API Secret'];
$apiKey = $settings['trader_sandbox']['API Key'];
$apiPassPhrase = $settings['trader_sandbox']['Passphrase'];

$urlBase = "https://api-public.sandbox.exchange.coinbase.com";

//get timestamp
$date = new \DateTime("now", new \DateTimeZone("America/Los_Angeles"));
$timestamp = $date->getTimestamp();

//API url
$relUrl = "/orders";

//set the method type GET|POST|DELETE|PUT
$method = "POST";

$params = [
    "type" => "market",
    "side" => "sell",
    "product_id" => "BTC-USD",
    "stp" => "dc",
    "size" => "0.10000000"
];

//copied from coinbase's documentation added apiSecret
function signature($request_path = '', $body = '', $timestamp = false, $method = 'GET', $apiSecret=null) {
    /**
     * Modified $body assignment to exclude empty bodies
     * @author Jared Clemence <jaredclemence@alum.drexel.edu>
     * @ref https://community.coinbase.com/t/get-fills-invalid-signature-error-php-example-included/911
     */
    $body = is_array($body) ? ( \count($body) > 0 ? json_encode($body) : null ) : $body;
    $timestamp = $timestamp ? time() : $timestamp;

    $what = $timestamp . $method . $request_path . $body;

    return base64_encode(hash_hmac("sha256", $what, base64_decode($apiSecret), true));
}

$url = $urlBase . $relUrl;

$ch = curl_init($url);
$output = \json_encode($params);

$signature = \signature($relUrl, $output, $timestamp, $method, $apiSecret);

$headers = [
    "User-Agent" => "Traderbot/v1.0",
    "CB-ACCESS-KEY" => $apiKey,
    "CB-ACCESS-SIGN" => $signature,
    "CB-ACCESS-TIMESTAMP" => $timestamp,
    "CB-ACCESS-PASSPHRASE" => $apiPassPhrase,
    "Content-Type" => "application/json"
];

\curl_setopt($ch, CURLOPT_POST, true);
\curl_setopt($ch, CURLOPT_POSTFIELDS, $output);

foreach ($headers as $key => &$header) {
    //this I found is necessary. Before I added this, the headers lacked the field data and only had the content values
    $header = "{$key}:$header";
}
\curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
\curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($ch);
\curl_close($ch);
try {
    $newResult = \json_decode($result);
    $result = $newResult;
} catch (Exception $ex) {

}
var_dump( $result );
/**
 * 
 * Output:

class stdClass#2 (1) {
  public $message =>
  string(13) "Invalid price"
}
 */

Answer 1

我认为导致此失败的唯一原因是目前通过Exchange API缺乏对市场订单的支持。来自文档：

即将推出的市场订单功能的文档仅供参考只要。该功能尚不可用。但是你应该更新你的处理处理程序以准备新的消息类型。

在此PHP代码中，Coinbase Exchange API导致市场订单失败的原因是什么？

1 个答案: