Google表格中的Cryptopia API（Google Apps脚本）

问题描述

继续使用Google Apps脚本构建Google SpreadSheet我已经完成了获得我的Bittrex和Poloniex余额的工作，但无法与Cryptopia合作。

以下是我与Bittrex奋斗的链接

以下是官方API链接：

以下是一些例子：

这里是我的代码，它会得到Invalid authorization header错误：

  / /获取Cryptopia余额
 var key = keys.getRange（B4）。getValue（）; 
 var secret = keys.getRange（C4）。getValue（）; 
 var baseUrl ='https://www.cryptopia.co.nz/api/'; 
 
 var command =GetBalance; 
 var url = baseUrl +命令; 
 
 var signature = key +POST+ encodeURIComponent（url）.toLowerCase（）+ nonce; 
 var hmacsignature = Utilities.computeHmacSignature（Utilities.MacAlgorithm.HMAC_SHA_256，signature，secret）; 
 
 var header_value =amx+ key +：+ hmacsignature +：+ nonce; 
 var headers = {'Authorization'：header_value，'Content-Type'：'application / json; charset = utf-8'}; 
 
 var options = {
 method：'POST'，
 headers：headers 
}; 
 
 var response = UrlFetchApp.fetch（https://www.cryptopia.co.nz/api/GetBalance，options）; 
 var json = JSON.parse（response.getContentText（））; 
 
  

解决方案

Utilities.computeHmacSignature（算法，值，键）方法不会正确计算二进制输入。 值和键参数的类型是 String ，但 Utilities.base64Decode 的结果是 Byte [] 。原始二进制值在从 Byte [] 转换为字符串时进行了更改。

使用，以及参阅。

可以使用以下方法计算正确的值，并通过正确 UrlFetchApp.fetch 的选项获取结果。

  ....粘贴src / sha256.js内容... 
 
 ... 
 var params = {Currency：BTC}; 
 ... 
 var sha = new jsSHA（SHA-256，TEXT）; 
 sha.setHMACKey（秘密，B64）; 
 sha.update（签名）; 
 var hmacsignature = sha.getHMAC（B64）; 
 
 var header_value =amx+ key +：+ hmacsignature +：+ nonce; 
 var headers = {
Authorization：header_value，
}; 
 
 var options = {
contentType：'application / json; charset = utf-8'，
method：'post'，
headers：headers，
payload：JSON.stringify（params），
contentLength ：JSON.stringify（params）.length 
}; 
 
 var response = UrlFetchApp.fetch（url，options）; 
 var json = JSON.parse（response.getContentText（））; 
 
 Logger.log（json）; 
  

In continuation of building Google SpreadSheet using Google Apps Script I've done with getting my Bittrex and Poloniex balances, but can't get to work with Cryptopia.

Here is a link to my struggles with Bittrex Map JSON objects array to strings

Here is an official API links: https://www.cryptopia.co.nz/Forum/Thread/256

Here are some examples:

1. https://www.cryptopia.co.nz/Forum/Thread/262
2. https://github.com/Coac/cryptopia.js/blob/master/index.js
3. https://github.com/sigwo/node-cryptopia/blob/master/cryptopia.js

Here is my code, which getting "Invalid authorization header" error:

// Get Cryptopia balances
  var key = keys.getRange("B4").getValue();
  var secret = keys.getRange("C4").getValue();
  var baseUrl = 'https://www.cryptopia.co.nz/api/';

  var command = "GetBalance";
  var url = baseUrl + command;

  var signature = key + "POST" + encodeURIComponent(url).toLowerCase() + nonce;
  var hmacsignature = Utilities.computeHmacSignature(Utilities.MacAlgorithm.HMAC_SHA_256,signature,secret);

  var header_value = "amx " + key + ":" + hmacsignature + ":" + nonce;
  var headers = { 'Authorization': header_value, 'Content-Type':'application/json; charset=utf-8' };

  var options = {
    method: 'POST',
    headers: headers
  };

  var response = UrlFetchApp.fetch("https://www.cryptopia.co.nz/api/GetBalance", options);
  var json = JSON.parse(response.getContentText());
}

解决方案

Utilities.computeHmacSignature(algorithm, value, key) method does not compute the binary input correctly. The type of value and key parameter is String, but Utilities.base64Decode's result is Byte[]. The raw binary value is changed while being converted from Byte[] to String.

Use jsSHA, and cf. https://stackoverflow.com/a/14007167.

The following can be used to calculate the correct value, and fetch the result by proper UrlFetchApp.fetch's options.

.... paste src/sha256.js contents ...

...
var params = {"Currency" : "BTC"};
...
var sha = new jsSHA("SHA-256", "TEXT");
sha.setHMACKey(secret, "B64");
sha.update(signature);
var hmacsignature = sha.getHMAC("B64");

var header_value = "amx " + key + ":" + hmacsignature + ":" + nonce;
var headers = {
  "Authorization" : header_value,
};

var options = {
  "contentType": 'application/json; charset=utf-8',
  "method": 'post',
  "headers": headers,
  "payload": JSON.stringify(params),
  "contentLength": JSON.stringify(params).length
};

var response = UrlFetchApp.fetch(url, options);
var json = JSON.parse(response.getContentText());

Logger.log(json);

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