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Cryptowatch HTTP API client

A rough implementation of the Cryptowatch HTTP API

Minimum PHP Version

Installation

This package can be installed using composer

composer require djansen20/cryptowatch-http-api:^1.0

Or add the following directly into your composer.json

{
    "require": {
        "djansen20/cryptowatch-http-api": "^1.0"
    }
}

Usage

In order to use this library, include the following namespace into you project

use Cryptowatch\CryptowatchHttpApi

All methods will return a response object that can be convertd to json or to a usable array

# To get data as array
$array = $response->asArray();

# Get data as json
$json = $response->jsonSerialize();

Rate limiting

Cryptowatch gives each client 8 seconds of CPU time per hour. Currently this client does not read this limit or does anything with it. If you get a response with status code 429 it means the request limit has been reached. The library will probably crap out earlier though.

Methods

All methods are called statically so there is no need to create an object. Currently there are 5 possible static methods.

getAssets

An asset can be a crypto or fiat currency

Example request

$asset = 'neo';
$responseObject = CryptowatchHttpApi::getAssets($asset);
$data = $responseObject->asArray();

Example response

array(2) {
  ["result"]=>
  array(5) {
    ["id"]=>
    int(66)
    ["symbol"]=>
    string(3) "neo"
    ["name"]=>
    string(3) "NEO"
    ["fiat"]=>
    bool(false)
    ["markets"]=>
    array(1) {
      ["base"]=>
      array(11) {
        [0]=>
        array(5) {
          ["id"]=>
          int(643)
          ["exchange"]=>
          string(6) "bitmex"
          ["pair"]=>
          string(22) "neobtc-monthly-futures"
          ["active"]=>
          bool(true)
          ["route"]=>
          string(62) "https://api.cryptowat.ch/markets/bitmex/neobtc-monthly-futures"
        }
        [1]=>
        array(5) {
          ["id"]=>
          int(661)
          ["exchange"]=>
          string(6) "bitmex"
          ["pair"]=>
          string(24) "neobtc-quarterly-futures"
          ["active"]=>
          bool(true)
          ["route"]=>
          string(64) "https://api.cryptowat.ch/markets/bitmex/neobtc-quarterly-futures"
        }
        ...
      }
    }
  }
  ["allowance"]=>
  array(2) {
    ["cost"]=>
    int(113410)
    ["remaining"]=>
    int(7947157629)
  }
}

getPairs

A pair of assets. Each pair has a base and a quote. For example, btceur has base btc and quote eur.

Example Request

$pair = 'neotbtc'
$responseObject = CryptowatchHttpApi::getPairs($pair);
$data = $responseObject->asArray();

Example Response

array(2) {
  ["result"]=>
  array(6) {
    ["symbol"]=>
    string(6) "neobtc"
    ["id"]=>
    int(86)
    ["base"]=>
    array(5) {
      ["id"]=>
      int(66)
      ["symbol"]=>
      string(3) "neo"
      ["name"]=>
      string(3) "NEO"
      ["fiat"]=>
      bool(false)
      ["route"]=>
      string(35) "https://api.cryptowat.ch/assets/neo"
    }
    ["quote"]=>
    array(5) {
      ["id"]=>
      int(60)
      ["symbol"]=>
      string(3) "btc"
      ["name"]=>
      string(7) "Bitcoin"
      ["fiat"]=>
      bool(false)
      ["route"]=>
      string(35) "https://api.cryptowat.ch/assets/btc"
    }
    ["route"]=>
    string(37) "https://api.cryptowat.ch/pairs/neobtc"
    ["markets"]=>
    array(3) {
      [0]=>
      array(5) {
        ["id"]=>
        int(582)
        ["exchange"]=>
        string(7) "binance"
        ["pair"]=>
        string(6) "neobtc"
        ["active"]=>
        bool(true)
        ["route"]=>
        string(47) "https://api.cryptowat.ch/markets/binance/neobtc"
      }
      [1]=>
      array(5) {
        ["id"]=>
        int(34)
        ["exchange"]=>
        string(8) "bitfinex"
        ["pair"]=>
        string(6) "neobtc"
        ["active"]=>
        bool(true)
        ["route"]=>
        string(48) "https://api.cryptowat.ch/markets/bitfinex/neobtc"
      }
      [2]=>
      array(5) {
        ["id"]=>
        int(383)
        ["exchange"]=>
        string(7) "bittrex"
        ["pair"]=>
        string(6) "neobtc"
        ["active"]=>
        bool(true)
        ["route"]=>
        string(47) "https://api.cryptowat.ch/markets/bittrex/neobtc"
      }
    }
  }
  ["allowance"]=>
  array(2) {
    ["cost"]=>
    int(224791)
    ["remaining"]=>
    int(7946932838)
  }
}

getExchanges

Get information on a specific exchange

Example Request

$exchange = 'bitstamp';
$responseObject = CryptowatchHttpApi::getExchanges($exchange);
$data = $responseObject->asArray();

Example Response

array(2) {
  ["result"]=>
  array(5) {
    ["id"]=>
    int(3)
    ["symbol"]=>
    string(8) "bitstamp"
    ["name"]=>
    string(8) "Bitstamp"
    ["active"]=>
    bool(true)
    ["routes"]=>
    array(1) {
      ["markets"]=>
      string(41) "https://api.cryptowat.ch/markets/bitstamp"
    }
  }
  ["allowance"]=>
  array(2) {
    ["cost"]=>
    int(29870)
    ["remaining"]=>
    int(7946902968)
  }
}

getMarkets

A market is a pair listed on an exchange. For example, pair btceur on exchange kraken is a market.

There are various subcommands available for each exchange / pair combo.

  • price // Returns a market’s last price.
  • summary // Returns a market’s last price as well as other stats based on a 24-hour sliding window.
  • trades // Returns a market’s most recent trades, incrementing chronologically.
  • orderbook // Returns a market’s order book.
  • ohlc // Returns a market’s OHLC candlestick data. Returns data as lists of lists of numbers for each time period integer.

Example Request

$exchange = 'bitstamp';
$pair = 'btcusd';
$subcommand = 'ohlc';

$params = [
    'after' => 1481563244
    'before' => 1481663244
    'periods' => 86400
];

$responseObject = CryptowatchHttpApi::getMarkets($exchange, $pair, $subcommand, $params);
$data = $responseObject->asArray();

Example Response

array(2) {
  ["result"]=>
  array(1) {
    [86400]=>
    array(2) {
      [0]=>
      array(7) {
        [0]=>
        int(1481587200)
        [1]=>
        float(768.97)
        [2]=>
        int(779)
        [3]=>
        float(768.96)
        [4]=>
        float(776.9)
        [5]=>
        float(2802.0916)
        [6]=>
        int(0)
      }
      [1]=>
      array(7) {
        [0]=>
        int(1481673600)
        [1]=>
        int(777)
        [2]=>
        float(793.27)
        [3]=>
        float(765.1)
        [4]=>
        float(775.35)
        [5]=>
        float(4918.8164)
        [6]=>
        int(0)
      }
    }
  }
  ["allowance"]=>
  array(2) {
    ["cost"]=>
    int(2032490)
    ["remaining"]=>
    int(7943769676)
  }
}

getAggregate

Markets are identified by a slug, which is the exchange name and currency pair concatenated with a colon.

There are currently 2 aggregates available

  • prices // Returns the current price for all supported markets. Some values may be out of date by a few seconds.
  • summaries // Returns the market summary for all supported markets. Some values may be out of date by a few seconds.

Example Request

$method = 'prices';
$responseObject = CryptowatchHttpApi::getAggregate($method);
$data = $responseObject->asArray();

Example Response

array(2) {
  ["result"]=>
  array(726) {
    ["binance:adabtc"]=>
    float(2.165E-5)
    ["binance:adaeth"]=>
    float(0.00033469)
    ["binance:arkbtc"]=>
    float(0.0003211)
    ["binance:batbtc"]=>
    float(2.413E-5)
    ["binance:bateth"]=>
    float(0.00037179)
    ["binance:bccbtc"]=>
    float(0.115777)
    ["binance:bcceth"]=>
    float(1.79409)
    ["binance:bccusdt"]=>
    float(989.7)
  ...
  }
  ["allowance"]=>
  array(2) {
    ["cost"]=>
    int(1039078)
    ["remaining"]=>
    int(7941514860)
  }
}