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为了我自己的目的，我用 PHP 创建了一个功能齐全的 Coinbase API 系统。但是，我无法正常运行系统的一部分：市价单。

下面出现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挖掘继承层更容易解决。

Coinbase API 返回错误消息，如此处代码底部的注释文本所示。'market' 订单 API 不需要 'price' 参数，如下所述：Coinbase Exchange API Documentation。当我通过添加请求的字段来响应错误消息时，订单最终成功，但订单被处理为“限价”订单，而不是类型所指示的“市场”订单。

你能看出我犯的错误吗？

<?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"
}
 */
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1 回答 1

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我猜唯一导致此失败的原因是目前通过 Exchange API 缺乏对市场订单的支持。从文档：

即将推出的市价单功能的文档仅供参考。该功能尚不可用。但是，您应该更新您的提要处理程序以准备新的消息类型。

于 2015-06-30T23:08:55.227 回答