README

Welcome to use Fintechonex API.

API Summarize

Market overview and general information.

Matching Engine

This chapter explains the matching engine in the following four aspects:

• Filled Price
• Order Life Cycle
• Token Trading Price Limit Rules
• Futures Trading Price Limit Rules

Filled Price

fintechonex’s matching engine operates at a first-come, first-serve basis. Orders are executed in price-time priority as received by the matching engine.

Example 3 orders are placed to the order book respectively: a) 9900USDT for 1BTC, b) 10100USDT for 2BTC, and c) 9900USDT for 1.5BTC. They will be matched in price-time priority, which is b > a > c.

Orders are matched and executed at maker price, not at taker price.

Example User A placed an order to buy 1BTC at 10000USDT, and after that, user B placed an order to sell 1BTC at 8000USDT. Since the order created by user A was placed in the book first, user A will be the maker in this transaction and the filled price will be 10000USDT.

Order Life Cycle

Valid orders sent to the matching engine are in "unfilled" state. If the order executes against another order, it is considered "filled". An order can be "partially filled" and stays in the orders matching queue. If an open order is recalled, it is considered "cancelled". All cancelled or filled orders will be removed from the matching queue.

Token Trading Price Limit Rules

A new Fill-or-kill feature is now available in spot token trading. It is designed to prevent execution errors which may lead to unnecessary loss when placing orders.

Should an order would be filled, regardless its filled quantity, at the price of ±30% from best bid & offer by the time it executed in the order book, the order would be entirely cancelled. Otherwise, the order would be executed and matched normally.

Example A user placed a market order to buy 100BTC in XRP/BTC. The best offer price at that time is 0.00012. If the order does entirely execute in the market, the market price would be driven up to 0.0002. Based of the calculation (0.0002-0.00012)/0.00012=66.7%>30%), the potential filled price would be deviated >30% from the current best offer. Therefore, the system would cancel the mentioned market order entirely.

Fees

This chapter explains the fee details in the following two aspects:

• Trading Fees
• Deposit/Withdrawal Fees

Trading Fees

To encourage more order placement and liquidity, fintechonex adopts a marker-taker fee schedule, which the maker fee is lower than the taker fee. The fee schedule is volume-based, to be eligible for a tier, you are required to meet the minimum trading volume requirements. The higher the tier you are in, the lower the fees you can enjoy. Aside from tiered-volume fees discount, our market maker program specifically rewards traders who intend to provide consistent liquidity and competitive bid-ask spread.

Please see here for details(https://www.fintechonex.com/pages/products/fees.html)

Deposit/Withdrawal Fees

fintechonex does not charge any withdrawal or deposit fees. Also, mining fees are not required for any transfers between OKCoin and fintechonex, and the transfers between the two platforms are instant. However, mining fees will be levied by miners for any withdrawals out of fintechonex and OKCoin.

Data Centers

The database and servers of fintechonex are based in Hong Kong. To lower the API latency, we suggest you to use an ISP that can communicate smoothly with Hong Kong.

Request

This chapter explains the request details in the following three aspects:

• Introduction
• Errors
• Success

Introduction

Rest API provides account management, market data, and transactions features. Rest API Terminal URL https://www.fintechonex.com/ We also provide WebSocket-stream. Subscribe to our WebSocket and you can get our market data push.

All requested are based on https protocol. Please set the contentType of the request message to: "application/json"

Errors

Unless otherwise stated, errors to bad requests will respond with HTTP 4xx or status codes. The body will also contain a message parameter indicating the cause. Your language’s http library should be configured to provide message bodies for non-2xx requests so that you can read the message field from the body.

Common Error Codes

Success

A successful response is indicated by HTTP status code 200 and may contain an optional body. If the response has a body it will be documented under each resource below.

Pagination

fintechonex uses cursor pagination for all REST requests which return arrays. Cursor pagination allows for fetching results before and after the current page of results and is well suited for real time data. Endpoints like /trades, /fills, /orders, return the latest items by default. To retrieve more results subsequent requests should specify which direction to paginate based on the data previously returned.

from and to cursors are available via response headers OK-BEFORE and OK-AFTER. Your requests should use these cursor values when making requests for pages after the initial request.

The from cursor references the first item in a results page and the after cursor references the last item in a set of results.

To request a page of records before the current one, use the from query parameter. Your initial request can omit this parameter to get the default first page.

The response will contain a OK-FROM header which will return the cursor id to use in your next request for the page before the current one. The page before is a newer page and not one that happened before in chronological time.

The response will also contain a OK-To header which will return the cursor id to use in your next request for the page after this one. The page after is an older page and not one that happened after this one in chronological time.

Example If the ID’s of the returned results are: 111, 112, 113, 114, 115, 116, 117, 118, 119, 120 Then they will be ordered in: 120, 119, 118, 117, 116, 115, 114, 113, 112, 111 The OK-FROM ID is now 120, and the OK-TO ID is now 111. If you want to access to updated data such as data after 120, then you will have to use the before parameters. For example: orders?from=120&limit=5 will return the 5 strings of data after 120, which is 125, 124, 123, 122, 121

Parameters

Example

GET /orders?from=2&limit=30

Rules

This chapter explains the standard specifications in the following three aspects:

• Timestamps
• Numbers
• IDs

Timestamps

Unless otherwise specified, all timestamps from API are returned in ISO 8601 with microseconds. Make sure you can parse the following ISO 8601 format. Most modern languages and libraries will handle this without issues.

Example

2014-11-06T10:34:47.123Z

Numbers

Decimal numbers are returned as strings to preserve full precision across platforms. When making a request, it is recommended that you also convert your numbers to strings to avoid truncation and precision errors.

Integer numbers (like trade id and sequence) are unquoted.

IDs

Most identifiers are UUID unless otherwise specified. When making a request which requires a UUID, both forms (with and without dashes) are accepted.

132fb6ae-456b-4654-b4e0-d681ac05cea1 or 132fb6ae456b4654b4e0d681ac05cea1

Endpoints

This chapter explains the details of endpoint types in the following two aspects:

• Public Endpoints
• Private Endpoints

Public Endpoints

Public APIs are available for acquiring information and market data. Public requests do not require any verifications.

Private Endpoints

Private endpoints are available for order management, and account management. Every private request must be signed using the described authentication scheme.

Private endpoints require authentication using your APIKey. You can generate APIKeys.

Rate Limits

This chapter explains the details of access restriction in the following two aspects:

• Rest API
• WebSocket

When a rate limit is exceeded, a status of ‘429: Too Many Requests’ will be returned.

Rest API

We use UserID for rate limiting if you have a valid APIKey. If not, we use the public IP for rate limiting.

Rate limit: Each interface on the separate instructions, if there is no general interface of speed for 6 times per second.

Special note: when placing multiple orders, every four trading pairs with 10 orders for each pair is counted as one request.

WebSocket

The WebSocket throttles the number of incoming messages to 50 commands per second.

Authentication

This chapter explains the details of authentication in the following five aspects:

• Generating an APIKey
• Creating a Request
• Signing a Message
• Timestamp
• Getting Server Time

Generating an APIKey

Before being able to sign any requests, you must create an APIKey via the fintechonex website. Upon creating a key you will have 3 pieces of information which you must remember:

APIKey

Secret

Passphrase

The APIKey and Secret will be randomly generated and provided by fintechonex; the Passphrase will be provided by you to further secure your API access. fintechonex stores the salted hash of your Passphrase for verification, but cannot recover the passphrase if you forget it.

Creating a Request

All REST requests must contain the following headers:

OK-ACCESS-KEY The APIKey as a string.

OK-ACCESS-SIGN The Base64-encoded signature (see Signing a Message).

OK-ACCESS-TIMESTAMP A timestamp for your request.

OK-ACCESS-PASSPHRASE The passphrase you specified when creating the APIKey.

All request bodies should have content type application/json and be valid JSON.

public enum ContentTypeEnum {

    APPLICATION_JSON("application/json"),
    APPLICATION_JSON_UTF8("application/json; charset=UTF-8"),
    // The server does not support types
    APPLICATION_FORM("application/x-www-form-urlencoded; charset=UTF-8"),;


    private String contentType;

    ContentTypeEnum(String contentType) {
        this.contentType = contentType;
    }

    public String contentType() {
        return contentType;
    }
}


public enum HttpHeadersEnum {

    OK_ACCESS_KEY("OK-ACCESS-KEY"),
    OK_ACCESS_SIGN("OK-ACCESS-SIGN"),
    OK_ACCESS_TIMESTAMP("OK-ACCESS-TIMESTAMP"),
    OK_ACCESS_PASSPHRASE("OK-ACCESS-PASSPHRASE"),

    OK_FROM("OK-FROM"),
    OK_TO("OK-TO"),
    OK_LIMIT("OK-LIMIT"),;

    private String header;

    HttpHeadersEnum(String header) {
        this.header = header;
    }

    public String header() {
        return header;
    }
}

import com.okcoin.commons.fintechonex.open.api.config.APIConfiguration;
import com.okcoin.commons.fintechonex.open.api.constant.APIConstants;
import com.okcoin.commons.fintechonex.open.api.enums.ContentTypeEnum;
import com.okcoin.commons.fintechonex.open.api.enums.HttpHeadersEnum;
import com.okcoin.commons.fintechonex.open.api.exception.APIException;
import com.okcoin.commons.fintechonex.open.api.utils.DateUtils;
import com.okcoin.commons.fintechonex.open.api.utils.HmacSHA256Base64Utils;
import okhttp3.*;
import okio.Buffer;

public class APIHttpClient {

    private APIConfiguration config;
    private APICredentials credentials;

    public APIHttpClient(APIConfiguration config, APICredentials credentials) {
        this.config = config;
        this.credentials = credentials;
    }

    public OkHttpClient client() {
        OkHttpClient.Builder clientBuilder = new OkHttpClient.Builder();
        clientBuilder.connectTimeout(this.config.getConnectTimeout(), TimeUnit.SECONDS);
        clientBuilder.readTimeout(this.config.getReadTimeout(), TimeUnit.SECONDS);
        clientBuilder.writeTimeout(this.config.getWriteTimeout(), TimeUnit.SECONDS);
        clientBuilder.retryOnConnectionFailure(this.config.isRetryOnConnectionFailure());
        clientBuilder.addInterceptor((Interceptor.Chain chain) -> {
            Request.Builder requestBuilder = chain.request().newBuilder();
            String timestamp = DateUtils.getBase64Time();
            requestBuilder.headers(headers(chain.request(), timestamp));
            Request request = requestBuilder.build();
            if (this.config.isPrint()) {
                printRequest(request, timestamp);
            }
            return chain.proceed(request);
        });
        return clientBuilder.build();
    }

    private Headers headers(Request request, String timestamp) {
        Headers.Builder builder = new Headers.Builder();
        builder.add(APIConstants.ACCEPT, ContentTypeEnum.APPLICATION_JSON.contentType());
        builder.add(APIConstants.CONTENT_TYPE, ContentTypeEnum.APPLICATION_JSON_UTF8.contentType());
        builder.add(APIConstants.COOKIE, getCookie());
        if (StringUtils.isNotEmpty(this.credentials.getSecretKey())) {
            builder.add(HttpHeadersEnum.OK_ACCESS_KEY.header(), this.credentials.getApiKey());
            builder.add(HttpHeadersEnum.OK_ACCESS_SIGN.header(), sign(request, timestamp));
            builder.add(HttpHeadersEnum.OK_ACCESS_TIMESTAMP.header(), timestamp);
            builder.add(HttpHeadersEnum.OK_ACCESS_PASSPHRASE.header(), this.credentials.getPassphrase());
        }
        return builder.build();
    }

    private String getCookie() {
        StringBuilder cookie = new StringBuilder();
        cookie.append(APIConstants.LOCALE).append(this.config.getI18n().i18n());
        return cookie.toString();
    }

    private String sign(Request request, String timestamp) {
        String sign;
        try {
            sign = HmacSHA256Base64Utils.sign(timestamp, method(request), requestPath(request),
                    queryString(request), body(request), this.credentials.getSecretKey());
        } catch (IOException e) {
            throw new APIException("Request get body io exception.", e);
        } catch (CloneNotSupportedException e) {
            throw new APIException("Hmac SHA256 Base64 Signature clone not supported exception.", e);
        } catch (InvalidKeyException e) {
            throw new APIException("Hmac SHA256 Base64 Signature invalid key exception.", e);
        }
        return sign;
    }

    private String url(Request request) {
        return request.url().toString();
    }

    private String method(Request request) {
        return request.method().toUpperCase();
    }

    private String requestPath(Request request) {
        String url = url(request);
        url = url.replace(this.config.getEndpoint(), APIConstants.EMPTY);
        String requestPath = url;
        if (requestPath.contains(APIConstants.QUESTION)) {
            requestPath = requestPath.substring(0, url.lastIndexOf(APIConstants.QUESTION));
        }
        if(this.config.getEndpoint().endsWith(APIConstants.SLASH)){
            requestPath = APIConstants.SLASH + requestPath;
        }
        return requestPath;
    }

    private String queryString(Request request) {
        String url = url(request);
        String queryString = APIConstants.EMPTY;
        if (url.contains(APIConstants.QUESTION)) {
            queryString = url.substring(url.lastIndexOf(APIConstants.QUESTION) + 1);
        }
        return queryString;
    }

    private String body(Request request) throws IOException {
        RequestBody requestBody = request.body();
        String body = APIConstants.EMPTY;
        if (requestBody != null) {
            Buffer buffer = new Buffer();
            requestBody.writeTo(buffer);
            body = buffer.readString(APIConstants.UTF_8);
        }
        return body;
    }
}



import retrofit2.Call;
import retrofit2.http.GET;
import retrofit2.http.Path;
import retrofit2.http.Query;

import java.util.List;

interface FuturesMarketAPI {

    @GET("/api/futures/v3/products/{instrument_id}/candles")
    Call<JSONArray> getProductCandles(@Path("instrument_id") String productId, @Query("start") String start, @Query("end") String end, @Query("granularity") String granularity);

}

import com.alibaba.fastjson.JSONArray;
import com.okcoin.commons.fintechonex.open.api.bean.futures.result.*;
import com.okcoin.commons.fintechonex.open.api.client.APIClient;
import com.okcoin.commons.fintechonex.open.api.config.APIConfiguration;
import com.okcoin.commons.fintechonex.open.api.service.futures.FuturesMarketAPIService;



public class FuturesMarketAPIServiceImpl implements FuturesMarketAPIService {

    private APIClient client;
    private FuturesMarketAPI api;

    public FuturesMarketAPIServiceImpl(APIConfiguration config) {
        this.client = new APIClient(config);
        this.api = client.createService(FuturesMarketAPI.class);
    }

    @Override
    public JSONArray getProductCandles(String productId, long start, long end, long granularity) {
        return this.client.executeSync(this.api.getProductCandles(productId, String.valueOf(start), String.valueOf(end), String.valueOf(granularity)));
    }

}

import okhttp3.Headers;
import okhttp3.OkHttpClient;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import retrofit2.Call;
import retrofit2.Response;
import retrofit2.Retrofit;

import java.io.IOException;
import java.util.List;
import java.util.Optional;

public class APIClient {

    /**
     * Synchronous send request
     */
    public <T> T executeSync(Call<T> call) {
        try {
            Response<T> response = call.execute();
            if (this.config.isPrint()) {
                printResponse(response);
            }
            int status = response.code();
            String message = new StringBuilder().append(response.code()).append(" / ").append(response.message()).toString();
            if (response.isSuccessful()) {
                return response.body();
            } else if (APIConstants.resultStatusArray.contains(status)) {
                HttpResult result = JSON.parseObject(new String(response.errorBody().bytes()), HttpResult.class);
                result.setStatusCode(status);
                throw new APIException(result.message());
            } else {
                throw new APIException(message);
            }
        } catch (IOException e) {
            throw new APIException("APIClient executeSync exception.", e);
        }
    }

}

public class FuturesAPIBaseTests extends BaseTests {

    public APIConfiguration config() {
        APIConfiguration config = new APIConfiguration();

        config.setEndpoint("https://www.fintechonex.com/");
        config.setApiKey("");
        config.setSecretKey("");

        config.setPassphrase("");
        config.setPrint(true);
        config.setI18n(I18nEnum.ENGLISH);

        return config;
    }

    String productId = "BTC-USD-180928";
}



import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.okcoin.commons.fintechonex.open.api.bean.futures.result.*;
import com.okcoin.commons.fintechonex.open.api.service.futures.FuturesMarketAPIService;
import com.okcoin.commons.fintechonex.open.api.service.futures.impl.FuturesMarketAPIServiceImpl;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.List;

public class FuturesMarketAPITests extends FuturesAPIBaseTests {

    private FuturesMarketAPIService marketAPIService;

    @Before
    public void before() {
        config = config();
        marketAPIService = new FuturesMarketAPIServiceImpl(config);
    }

    @Test
    public void testGetProductCandles() {
        long start = System.currentTimeMillis();
        long end = System.currentTimeMillis() + 2000L;
        JSONArray array = marketAPIService.getProductCandles(productId, 1530323640000L, 0, 180L);
        toResultString(LOG, "Product-Candles", array);
    }


}

package fintechonex

import (
    "bytes"
    "errors"
    "fmt"
    "io/ioutil"
    "net/http"
    "strconv"
    "strings"
    "time"
)

type Client struct {
    Config     Config
    HttpClient *http.Client
}

type ApiMessage struct {
    Message string `json:"message"`
}

/*
 Get a http client
*/
func NewClient(config Config) *Client {
    var client Client
    client.Config = config
    timeout := config.TimeoutSecond
    if timeout <= 0 {
        timeout = 30
    }
    client.HttpClient = &http.Client{
        Timeout: time.Duration(timeout) * time.Second,
    }
    return &client
}

/*
 Send a http request to remote server and get a response data
*/
func (client *Client) Request(method string, requestPath string,
    params, result interface{}) (response *http.Response, err error) {
    config := client.Config
    // uri
    endpoint := config.Endpoint
    if strings.HasSuffix(config.Endpoint, "/") {
        endpoint = config.Endpoint[0:len(config.Endpoint)-1]
    }
    url := endpoint + requestPath

    // get json and bin styles request body
    var jsonBody string
    var binBody = bytes.NewReader(make([]byte, 0))
    if params != nil {
        jsonBody, binBody, err = ParseRequestParams(params)
        if err != nil {
            return response, err
        }
    }

    // get a http request
    request, err := http.NewRequest(method, url, binBody)
    if err != nil {
        return response, err
    }

    // Sign and set request headers
    timestamp := IsoTime()
    preHash := PreHashString(timestamp, method, requestPath, jsonBody)
    sign, err := HmacSha256Base64Signer(preHash, config.SecretKey)
    if err != nil {
        return response, err
    }
    Headers(request, config, timestamp, sign)

    if config.IsPrint {
        printRequest(config, request, jsonBody, preHash)
    }

    // send a request to remote server, and get a response
    response, err = client.HttpClient.Do(request)
    if err != nil {
        return response, err
    }
    defer response.Body.Close()

    // get a response results and parse
    status := response.StatusCode
    message := response.Status
    body, err := ioutil.ReadAll(response.Body)
    if err != nil {
        return response, err
    }

    if config.IsPrint {
        printResponse(status, message, body)
    }

    response.Header.Add(ResultJsonString, string(body))

    if status >= 200 && status < 300 {
        if body != nil && result != nil {
            err := JsonBytes2Struct(body, result)
            if err != nil {
                return response, err
            }
        }
        return response, nil
    } else if status == 400 || status == 401 || status == 500 {
        if body != nil {
            var apiMessage ApiMessage
            err := JsonBytes2Struct(body, &apiMessage)
            if err != nil {
                return response, err
            }
            message = strconv.Itoa(status) + " " + apiMessage.Message
        }
        return response, errors.New(message)
    } else {
        return response, errors.New(message)
    }
    return response, nil
}

type Config struct {
    // Rest API endpoint url. eg: http://www.fintechonex.com/
    Endpoint string
    // The user's APIKey provided by fintechonex.
    ApiKey string
    // The user's secret key provided by fintechonex. The secret key used to sign your request data.
    SecretKey string
    // The Passphrase will be provided by you to further secure your API access.
    Passphrase string
    // Http request timeout.
    TimeoutSecond int
    // Whether to print API information
    IsPrint bool
    // Internationalization @see file: constants.go
    I18n string
}

func (client *Client) GetFuturesProductCandles(productId string, start, end, granularity int64) ([][] float64, error) {
    var candles [][] float64
    params := NewParams()
    params["start"] = Int642String(start)
    params["end"] = Int642String(end)
    params["granularity"] = Int642String(granularity)
    requestPath := BuildParams(FuturesPathPrefix+"products/"+productId+"/candles", params)
    _, err := client.Request(GET, requestPath, nil, &candles)
    return candles, err
}


func NewTestClient() *Client {
    // Set fintechonex API's config
    var config Config
    config.Endpoint = "https://www.fintechonex.com/"
    config.ApiKey = ""
    config.SecretKey = ""
    config.Passphrase = ""
    config.TimeoutSecond = 45
    config.IsPrint = false
    config.I18n = ENGLISH

    client := NewClient(config)
    return client
}



import "testing"

const (
    productId = "BTC-USD-180928"
    currency  = "BTC"
)

func TestGetFuturesProductCandles(t *testing.T) {
    start := int64(0)
    end := int64(0)
    candles, err := NewTestClient().GetFuturesProductCandles(productId, start, end, 180)
    if err != nil {
        t.Error(err)
    }
    FmtPrintln(GUnitTest+"Futures product candles: ", candles)
}

string OKEXAPI::GetSign(string timestamp, string method, string requestPath, string body) {
    string sign;
    unsigned char * mac = NULL;
    unsigned int mac_length = 0;
    string data = timestamp + method + requestPath + body;
    string key = m_config.SecretKey;
    int ret = HmacEncode("sha256", key.c_str(), key.length(), data.c_str(), data.length(), mac, mac_length);
    sign = Base64_encode(mac, mac_length);
    return sign;
}

string OKEXAPI::Request(const string &method, const string &requestPath, const string &params) {
    /************************** set request method ***************************/
    http_request request;
    request.set_method(method);
    /************************** set request uri ***************************/
    uri_builder builder;
    builder.append_path(requestPath);
    request.set_request_uri(builder.to_uri());

    /************************** set request headers ***************************/
    char * timestamp = new char[32];
    timestamp = GetTimestamp(timestamp, 32);
    string sign = GetSign(timestamp, method, builder.to_string(), params);
    request.headers().clear();
    request.headers().add(U("OK-ACCESS-KEY"), m_config.ApiKey);
    request.headers().add(U("OK-ACCESS-SIGN"), sign);
    request.headers().add(U("OK-ACCESS-TIMESTAMP"), timestamp);
    request.headers().add(U("OK-ACCESS-PASSPHRASE"), m_config.Passphrase);
    request.headers().add(U("Accept"), U("application/json"));
    request.headers().set_content_type(U("application/json; charset=UTF-8"));
    request.headers().add(U("Cookie"),U("locale="+m_config.I18n));

    /************************** set request body ***************************/
    request.set_body(params,"application/json; charset=UTF-8");

    /************************** get response ***************************/
    http_response response;
    string str;
    http_client client(m_config.Endpoint);
    response = client.request(request).get();
    str = response.extract_string(true).get();

    delete []timestamp;
    return str;
}


string GetSpotOrdersExample() {
    OKEXAPI okexapi;
    /************************** set config **********************/
    struct Config config;
    config.Endpoint = "https://www.fintechonex.com";
    config.SecretKey = "";
    config.ApiKey = "";
    config.Passphrase = "";
    okapi.SetConfig(config);

    /************************** set parameters **********************/
    string method(GET);
    map<string,string> m;
    m.insert(make_pair("productId", "BTC-USD"));
    m.insert(make_pair("status", "all"));

    /************************** request and response **********************/
    string request_path = BuildParams("/api/spot/v3/orders", m);
    return okexapi.Request(method, request_path);
}

string AddSpotOrderExample() {
    OKEXAPI okexapi;
    /************************** set config **********************/
    struct Config config;
    config.Endpoint = "https://www.fintechonex.com";
    config.SecretKey = "";
    config.ApiKey = "";
    config.Passphrase = "";
    okapi.SetConfig(config);

    /************************** set parameters **********************/
    value obj;
    obj["size"] = value::number(1);
    obj["price"] = value::number(8);
    obj["side"] = value::string("buy");
    obj["instrument_id"] = value::string("BTC-USD");

    /************************** request and response **********************/
    string params = obj.serialize();
    return okexapi.Request(POST, "/api/spot/v3/orders", params);
}
}

import hmac
import Base64
import requests
import json

CONTENT_TYPE = 'Content-Type'
OK_ACCESS_KEY = 'OK-ACCESS-KEY'
OK_ACCESS_SIGN = 'OK-ACCESS-SIGN'
OK_ACCESS_TIMESTAMP = 'OK-ACCESS-TIMESTAMP'
OK_ACCESS_PASSPHRASE = 'OK-ACCESS-PASSPHRASE'
APPLICATION_JSON = 'application/json'


# signature
def signature(timestamp, method, request_path, body, secret_key):
    if str(body) == '{}' or str(body) == 'None':
        body = ''
    message = str(timestamp) + str.upper(method) + request_path + str(body)
    mac = hmac.new(bytes(secret_key, encoding='utf8'), bytes(message, encoding='utf-8'), digestmod='sha256')
    d = mac.digest()
    return Base64.b64encode(d)


# set request header
def get_header(api_key, sign, timestamp, passphrase):
    header = dict()
    header[CONTENT_TYPE] = APPLICATION_JSON
    header[OK_ACCESS_KEY] = api_key
    header[OK_ACCESS_SIGN] = sign
    header[OK_ACCESS_TIMESTAMP] = str(timestamp)
    header[OK_ACCESS_PASSPHRASE] = passphrase
    return header


def parse_params_to_str(params):
    url = '?'
    for key, value in params.items():
        url = url + str(key) + '=' + str(value) + '&'

    return url[0:-1]


# Example Request 
# set the request url
base_url = 'https://www.fintechonex.com'
request_path = '/api/account/v3/currencies'
# set request header
header = get_header('your_api_key', signature('timestamp', 'GET', request_path, 'your_secret_key'), 'timestamp', 'your_passphrase')
# do request
response = requests.get(base_url + request_path, headers=header)
# json
print(response.json())

# [{
#     "id": "BTC",
#     "name": "Bitcoin"，
#      "deposit": "1",
#      "withdraw": "1",
#       "withdraw_min":"0.000001btc"
# }, {
#     "id": "ETH",
#     "name": "Ethereum",
#     "deposit": "1",
#      "withdraw": "1"，
#      "withdraw_min":"0.0001eth"
#     }
#  …
# ]


########################################################
# take order
base_url = 'https://www.fintechonex.com'
request_path = '/api/spot/v3/orders'

# request params
params = {'type': 'market', 'side': 'buy', 'instrument_id': 'usdt_okb', 'size': '10', 'client_oid': '',
                  'price': '10', 'funds': ''}

# request path
request_path = request_path + parse_params_to_str(params)
url = base_url + request_path

# request header and body
header = get_header('your_api_key', signature('timestamp', 'POST', request_path, 'your_secret_key'), 'timestamp', 'your_passphrase')
body = json.dumps(params)

# do request
response = requests.post(url, data=body, headers=header)

#########################################################
# get order info
base_url = 'https://www.fintechonex.com'
request_path = '/api/spot/v3/orders'

params = {'status':'all', 'instrument_id': 'okb_usdt'}

# request path
request_path = request_path + parse_params_to_str(params)
url = base_url + request_path

# request header and body
header = get_header('your_api_key', signature('timestamp', 'GET', request_path, 'your_secret_key'), 'timestamp', 'your_passphrase')

# do request
response = requests.get(url, headers=header)

Timestamp

The OK-ACCESS-TIMESTAMP request header must be in the UTC time zone Unix timestamp decimal seconds format or the ISO8601 standard time format. It needs to be accurate to milliseconds.

Your timestamp must be within 30 seconds of the api service time or your request will be considered expired and rejected. We recommend using the time endpoint to query for the API server time if you believe there many be time skew between your server and the API servers.

Getting Server Time

API server time. This is a public endpoint, no verification is required.

HTTP Requests

GET /api/general/v3/time

{

"iso": "2015-01-07T23:47:25.201Z",

"epoch": 1420674445.201

}

Wallet API

The Funding Account API is used to transfer funds among the main account, sub accounts and various trading accounts, as well as getting deposit addresses and making withdrawals.

Get Currencies

This retrieves a list of all currencies. Not all currencies can be traded. Currencies that have not been defined in ISO 4217 may use a custom symbol.

Limit: 6 requests per second

HTTP Request

GET/api/account/v3/currencies

Example Request

GET/api/account/v3/currencies

    {
         "can_deposit":1,
         "can_withdraw":1,
         "currency":"BTC",
         "min_withdrawal":0.01,
         "name":""
     },
     {
         "can_deposit":1,
         "can_withdraw":1,
         "currency":"LTC",
         "min_withdrawal":0.1,
         "name":""
     }

Wallet Information

This retrieves information on the balances of all the assets, and the amount that is available or on hold.

Limit: 6 requests per second

HTTP Request

GET/api/account/v3/wallet

Example Request

GET/api/account/v3/wallet

    {
        "available":37.11827078,
        "balance":37.11827078,
        "currency":"ETH",
        "hold":0
    },
    {
        "available":0,
        "balance":0,
        "currency":"BTC",
        "hold":0
    }

Wallet of a Currency

This retrieves information for a single token in your account, including the remaining balance, and the amount available or on hold.

Limit: 6 requests per second

HTTP Request

GET/api/account/v3/wallet/< currency >

Example Request

GET/api/account/v3/wallet/XMR

Parameters

[{
    "balance":"300.00000000",
    "available":"300.00000000",
    "currency":"BTC",
    "hold":"0.00000000"
}]

Funds Transfer

This endpoint supports the transfer of funds between Funding Account, trading accounts, main account and sub accounts.

Limit: 20 times / 2s

Limit: 1 time / 2s (Counted Per each token)

HTTP Requests

POST /api/account/v3/transfer

Example Request

POST /api/account/v3/transfer

Request Parameters

{
    "transfer_id": "754147",
    "currency"："ETC"
    "from": "6",
    "amount": "0.1",
    "to": "1",
    "result": true
}

Withdrawal

This endpoint supports the withdrawal of tokens

Limit: 6 requests per second

HTTP Request

POST /api/account/v3/withdrawal

Example Request

POST /api/account/v3/withdrawal{"amount":"1","fee":"0.0005","trade_pwd":"123456","destination":4,"currency":"btc","to_address":"17DKe3kkkkiiiiTvAKKi2vMPbm1Bz3CMKw"}

Request Parameters

Notes

About tag: Some token deposits requires a deposit address and a tag (AKA Memo/Payment ID), which is a string that guarantees the uniqueness of your deposit address. Please follow the deposit procedure carefully, or you may risk losing your assets

{
    "amount":0.1,
    "withdrawal_id":67485,
    "currency":"btc",
    "result":true
}

Withdrawal Fees

This retrieves the information about the recommended network transaction fee for withdrawals to digital currency addresses. The higher the fees are set, the faster the confirmations.

Limit: 6 requests per second

HTTP Requests

GET/api/account/v3/withdrawal/fee

Example Request

GET/api/account/v3/withdrawal/fee?currency=btc

Parameters

{
        "currency":"BTC",
        "max_fee":0.02,
        "min_fee":0.0005
    },
    {
        "currency":"LTC",
        "max_fee":0.2,
        "min_fee":0.001
    },
    {
        "currency":"ETH",
        "max_fee":0.2,
        "min_fee":0.01
    }

Recent Withdrawal History

This retrieves up to 100 recent withdrawal records.

Limit: 6 requests per second

HTTP Request

GET/api/account/v3/withdrawal/history

Example Request

GET/api/account/v3/withdrawal/history

    {
        "amount":0.094,
        "withdrawal_id": "4703879",
        "fee":"0.01000000eth",
        "txid":"0x62477bac6509a04512819bb1455e923a60dea5966c7caeaa0b24eb8fb0432b85",
        "currency":"ETH",
        "from":"13426335357",
        "to":"0xA41446125D0B5b6785f6898c9D67874D763A1519",
        "timestamp":"2018-04-22T23:09:45.000Z",
        "status":2
    },
    {
        "amount":0.01,
        "withdrawal_id": "4703879",
        "fee":"0.00000000btc",
        "txid":"",
        "currency":"BTC",
        "from":"13426335357",
        "to":"13426335357",
        "timestamp":"2018-05-17T02:43:08.000Z",
        "status":2
    }

Recent Withdrawal History of a Currency

This retrieves the withdrawal records of a specific currency.

Limit: 6 requests per second

HTTP Request

GET/api/account/v3/withdrawal/history/<currency>

Example Request

GET/api/account/v3/withdrawal/history/btc

Parameters

[
    {
        "amount":"0.01105486",
        "withdrawal_id": "4703879",
        "fee":"0.00000000btc",
        "txid": "66602e279569ba319a929f5bda731d228962bc67cd89dfa0d432d82722681d66",
        "currency": "BTC",
        "from":"13426335357",
        "to":"13426335357",
        "timestamp":"2018-09-30T02:49:29.000Z",
        "status":"2"
    },
    {
        "amount":"0.01144408",
        "withdrawal_id": "4703859",
        "fee":"0.00000000btc",
        "txid": "66602e279569ba319a929f5bda731d228962456475467d89dfa0d432d82722681d66",
        "currency": "BTC",
        "from":"13426335357",
        "to":"13426335357",
        "timestamp":"2018-09-18T00:44:56.000Z",
        "status":"2"
    }
]

Bills Details

This endpoint retrieves the bill details of the Funding Account. All the information will be paged and sorted in reverse chronological order, which means the latest will be at the top. Please refer to the pagination section for additional records after the first page. 3 months recent records will be returned at maximum

Limit: 20 times / 2s

HTTP Requests

GET /api/account/v3/ledger

Example Request

GET /api/account/v3/ledger?type=2&currency=btc&from=4&limit=10

Request Parameters

{
        "amount":"0.00100941",
        "balance":0,
        "currency":"BTC",
        "fee":0,
        "ledger_id":9260348,
        "timestamp":"2018-10-19T01:12:21.000Z",
        "typename":"To: spot account"
    },
    {
        "amount":0.00051843,
        "balance":0.00100941,
        "currency":"BTC",
        "fee":0,
        "ledger_id":8987285,
        "timestamp":"2018-10-12T11:01:14.000Z",
        "typename":"Get from activity"
    }

Get Deposit Address

This retrieves the deposit addresses of currencies, including previously used addresses.

Limit: 6 requests per second

HTTP Request

GET/api/account/v3/deposit/address

Example Request

GET/api/account/v3/deposit/address?currency=eos

Parameters

[
    {
        "address": "okbtothemoon",
        "memo": "971668",
        "currency": "eos",
        "to": 6
    }
]

Get Deposit History of All Currencies

This retrieves the deposit history of all currencies, up to 100 recent records(Within one year).

Limit: 6 requests per second

HTTP Request

GET/api/account/v3/deposit/history

Example Request

GET/api/account/v3/deposit/history

[
    {
        "amount":"0.01044408",
        "txid":"1915737_3_0_0_WALLET",
        "currency":"BTC",
        "from": "13801825426",
        "to":"",
        "timestamp":"2018-09-30T02:45:50.000Z",
        "status":"2"
        "deposit_id": "4003809",
    },
    {
        "amount":"491.6784211",
        "txid":"1744594_3_184_0_WALLET",
        "currency":"OKB",
        "from": "",
        "to":"",
        "timestamp":"2018-08-21T08:03:10.000Z",
        "status":"2"
        "deposit_id": "4709809",
    },
    {
        "amount":"223.18782496",
        "txid":"6d892c669225b1092c780bf0da0c6f912fc7dc8f6b8cc53b003288624c",
        "currency":"USDT",
        "from": "",
        "to":"39kK4XvgEuM7rX9frgyHoZkWqx4iKu1spD",
        "timestamp":"2018-08-17T09:18:40.000Z",
        "status":"2"
        "deposit_id": "4703809",
    }
]

Get Deposit History of a Currency

This retrieves the deposit history of a currency, latest 3 months records will be returned at maximum.

Limit: 6 requests per second

HTTP Request

GET/api/account/v3/deposit/history/<currency>

Example Request

GET/api/account/v3/deposit/history/btc

Parameters

[
    {
        "amount":"0.0835",
        "txid":"6d892c669225b1092c780bf0da0c6f912fc3e8f997dc8f6b8cc53b003288624c",
        "currency":"BTC",
        "from":"13800138000"
        "to":"39kK4XvgEuM7rX9frgyHoZkWqx4iKu1spD",
        "timestamp":"2018-06-09T07:57:09.000Z",
        "status":"2"
        "deposit_id": "4703809",
    },
    {
        "amount":"0.01",
        "txid":"590426_1_0_WALLET",
        "currency":"BTC",
        "from":""
        "to":"",
        "timestamp":"2018-05-30T01:33:40.000Z",
        "status":"2"
        "deposit_id": "4703909",
    }
]

Spot Trading API

This includes endpoints for retrieving market data, account information, order management, and bills details of your trading account.

Note: Some of the API response parameters may be redundant in order to stay compatible with the older version. Please only reference parameters specified in the API documentation.

For example, the API may return three values for the amount on hold, frozen, hold, and holds. Please use hold as referred in the documentation.

Account Information

This retrieves the list of assets, (with non-zero balance), remaining balance, and amount available in the spot trading account.

Rate limit: 20 requests per 2 seconds

HTTP Requests

GET/api/spot/v3/accounts

Example Request

GET/api/spot/v3/accounts

[
    {
        "frozen":"0",
        "hold":"0",
        "id": "",
        "currency":"BTC",
        "balance":"0.0049925",
        "available":"0.0049925",
        "holds":"0"
    },
    {
        "frozen":"0",
        "hold":"0",
        "id": "",
        "currency":"USDT",
        "balance":"226.74061435",
        "available":"226.74061435",
        "holds":"0"
    },
    {
        "frozen":"0",
        "hold":"0",
        "currency":"EOS",
        "balance":"0.4925",
        "available":"0.4925",
        "holds":"0"
    }
]

Get Currency

This retrieves information for a single currency in your account, including the remaining balance, and the amount available or on hold.

Limit: 20 requests per 2 seconds

HTTP Request

GET/api/spot/v3/accounts/<currency>

Example Request

GET/api/spot/v3/accounts/btc

Parameters

{
    "frozen":"0",
    "hold":"0",
    "id":"",
    "currency":"BTC",
    "balance":"0.0049925",
    "available":"0.0049925",
    "holds":"0"
}

Bills Details

All paginated requests return the latest information (newest) as the first page sorted by newest (in chronological time) first. This API can retrieve data in the last 3 months.

Rate limit: 20/2s

HTTP Requests

GET /api/spot/v3/accounts/<currency>/ledger

End Certificate Example Request

GET /api/spot/v3/accounts/btc/ledger?limit=3&from=2&to=4

[
    {
        "timestamp":"2019-03-18T07:26:50.000Z",
        "ledger_id":"3995466151",
        "created_at":"2019-03-18T07:26:50.000Z",
        "currency":"BTC",
        "amount":"0.0009985",
        "balance":"0.0049925",
        "type":"trade",
        "details":{
            "instrument_id":"BTC-USDT",
            "order_id":"2500723297813504",
            "product_id":"BTC-USDT"
        }
    },
    {
        "timestamp":"2019-03-18T07:26:50.000Z",
        "ledger_id":"3995466150",
        "created_at":"2019-03-18T07:26:50.000Z",
        "currency":"BTC",
        "amount":"0.0009985",
        "balance":"0.003994",
        "type":"trade",
        "details":{
            "instrument_id":"BTC-USDT",
            "order_id":"2500723297223680",
            "product_id":"BTC-USDT"
        }
    },
    {
        "timestamp":"2019-03-18T07:08:25.000Z",
        "ledger_id":"3995334780",
        "created_at":"2019-03-18T07:08:25.000Z",
        "currency":"BTC",
        "amount":"0.0009985",
        "balance":"0.0029955",
        "type":"trade",
        "details":{
            "instrument_id":"BTC-USDT",
            "order_id":"2500650881647616",
            "product_id":"BTC-USDT"
        }
    }
]

Place Order

spot trading supports only limit and market orders. More order types will become available in the future. You can place an order only if you have enough funds.

Once your order is placed, the amount will be put on hold until the order is executed.

Rate limit: 100 requests per 2 seconds （The speed limit is not accumulated between different trading pair symbols)

HTTP Request

POST /api/spot/v3/orders

Example Request

POST /api/spot/v3/orders{"type": "limit", "side": "buy", "instrument_id": "BTC-USDT", "size":"0.001", "client_oid": "oktspot79", "price": "4638.51", "notional": "", "order_type": "3"}

Parameters

Limit Order Parameters

Market Order Parameters

Response

{
    "client_oid":"oktspot79",
    "error_message":"",
    "error_code":"0",
    "order_id":"2510789768709120",
    "result":true
}

Batch Orders

This supports placing multiple orders in batches for up to 4 trading pairs and a maximum of 10 orders per trading pair can be placed at a time.

Rate limit: 50 requests per 2 seconds （The speed limit is accumulated between different trading pair symbols)

HTTP Request

POST /api/spot/v3/batch_orders

Example Request

POST /api/spot/v3/batch_orders[{"client_oid":"ww20180728","instrument_id":"btc-usdt","side":"sell","type":"limit","size":"0.001","price":"10001","margin_trading ":"1"},{"client_oid":"w20180728","instrument_id":"btc-usdt","side":"sell","type":"limit","size":"0.001","price":"10002","margin_trading ":"1"}]

Parameters

Limit Order Parameters

Market Order Parameters

{
    "btc_usdt":[
        {
            "client_oid":"oktspot80",
            "error_message":"",
            "error_code":"0",
            "order_id":"2510832677159936",
            "result":true
        },
        {
            "client_oid":"oktspot81",
            "error_message":"",
            "error_code":"0",
            "order_id":"2510832677225472",
            "result":true
        },
        {
            "client_oid":"oktspot82",
            "error_message":"",
            "error_code":"0",
            "order_id":"2510832677225473",
            "result":true
        }
    ]
}

Cancel Order

This is used to cancel an unfilled order.

Rate limit: 100 requests per 2 seconds （The speed limit is not accumulated between different trading pair symbols)

HTTP Request

POST /api/spot/v3/cancel_orders/<order_id> or <client_oid>

Example Request

2018-10-12T07:34:30.223ZPOST/api/spot/v3/cancel_orders/a123{"instrument_id":"btc-usdt"}

Parameters

{
    "client_oid": "order123",
    "error_message":"",
    "error_code":"0",
    "order_id": "4407638476788736", 
    "result": true

}

Cancel Multiple Orders

Cancel multiple open orders with order_id or client_oid. Up to 4 trading pairs, and maximum 10 orders can be canceled at a time for each trading pair.

Rate limit: 20 requests per 2 seconds （The speed limit is accumulated between different trading pair symbols)

HTTP Requests

POST /api/spot/v3/cancel_batch_orders

Example Request

2018-10-12T07:30:49.664ZPOST/api/spot/v3/cancel_batch_orders[{"instrument_id":"btc-usdt","client_oids":["a123","a1234"]},{"instrument_id":"eth-usdt","client_oids":["a12345","a123456"]}]

Parameters

{
    "btc-usdt":[
    {
       "result":true,
       "error_message":"",
       "error_code":"0",
       "client_oid":"a123",
       "order_id": "2510832677225473"
     },
   {
       "result":true,
       "error_message":"",
       "error_code":"0",
       "client_oid":"a1234",
       "order_id": "2510832677225474"
     }
],
"eth-usdt":[
    {
       "result":true,
       "error_message":"",
       "error_code":"0",
       "client_oid":"a12345",
       "order_id": "2510832677225475"
     },
   {
       "result":true,
       "error_message":"",
       "error_code":"0",
       "client_oid":"a123456",
       "order_id": "2510832677225476"
     }
]
}

Order List

This retrieves the list of your orders from the most recent 3 months. This request supports paging and is stored according to the order time in chronological order from latest to earliest.

Rate limit: 10 requests per 2 seconds

HTTP Request

GET/api/spot/v3/orders

Example Request

2019-03-18T07:49:43.306ZGET/api/spot/v3/orders?instrument_id=BTC-USDT&state=filled&limit=2&&after=2500723297223680

Parameters

[
     {
            "client_oid":"oktspot76",
            "created_at":"2019-03-18T07:26:49.000Z",
            "filled_notional":"3.9734",
            "filled_size":"0.001",
            "funds":"",
            "instrument_id":"BTC-USDT",
            "notional":"",
            "order_id":"2500723297813504",
            "order_type":"0",
            "price":"4013",
            "price_avg": "4013",
            "product_id":"BTC-USDT",
            "side":"buy",
            "size":"0.001",
            "status":"filled",
            "state":"-2",
            "timestamp":"2019-03-18T07:26:49.000Z",
            "type":"limit"
     },
     {
            "client_oid":"oktspot75",
            "created_at":"2019-03-18T07:26:49.000Z",
            "filled_notional":"3.9734",
            "filled_size":"0.001",
            "funds":"",
            "instrument_id":"BTC-USDT",
            "notional":"",
            "order_id":"2500723297223680",
            "order_type":"0",
            "price":"4013",
            "price_avg": "4013",
            "product_id":"BTC-USDT",
            "side":"buy",
            "size":"0.001",
            "status":"filled",
            "state": "-2",    
            "timestamp":"2019-03-18T07:26:49.000Z",
            "type":"limit"
     },
     {
            "client_oid":"oktspot74",
            "created_at":"2019-03-18T07:08:24.000Z",
            "filled_notional":"3.9768",
            "filled_size":"0.001",
            "funds":"",
            "instrument_id":"BTC-USDT",
            "notional":"",
            "order_id":"2500650881647616",
            "order_type":"0",
            "price":"4016.8",
            "price_avg": "4016.8",
            "product_id":"BTC-USDT",
            "side":"buy",
            "size":"0.001",
            "staus":"filled",
            "state": "-2",    
            "timestamp":"2019-03-18T07:08:24.000Z",
            "type":"limit"
     }

]

Open Orders

This retrieves the list of your current open orders. Pagination is supported and the response is sorted with most recent first in reverse chronological order.

Rate limit: 20 requests per 2 seconds

HTTP Request

GET/api/spot/v3/orders_pending

Example Request

2018-09-12T07:51:51.138ZGET/api/spot/v3/orders_pending?limit=2&instrument_id=btc-usdt&after=2500723297223680

Parameters

[
        {
            "client_oid":"oktspot86",
            "created_at":"2019-03-20T03:28:14.000Z",
            "filled_notional":"0",
            "filled_size":"0",
            "funds":"",
            "instrument_id":"BTC-USDT",
            "notional":"",
            "order_id":"2511109744100352",
            "order_type":"0",
            "price":"3594.7",
            "price_avg":"",
            "product_id":"BTC-USDT",
            "side":"buy",
            "size":"0.001",
            "status":"open",
            "state":"0",
            "timestamp":"2019-03-20T03:28:14.000Z",
            "type":"limit"
        },
        {
            "client_oid":"oktspot85",
            "created_at":"2019-03-20T03:28:10.000Z",
            "filled_notional":"0",
            "filled_size":"0",
            "funds":"",
            "instrument_id":"BTC-USDT",
            "notional":"",
            "order_id":"2511109459543040",
            "order_type":"0",
            "price":"3594.9",
            "price_avg":"",
            "product_id":"BTC-USDT",
            "side":"buy",
            "size":"0.001",
            "status":"open",
            "state":"0",
            "timestamp":"2019-03-20T03:28:10.000Z",
            "type":"limit"
        }
]

Order Details

Retrieve order details by order ID.Can get order information for nearly 3 months。 Unfilled orders will be kept in record for only two hours after it is canceled.

Rate limit: 20 requests per 2 seconds

HTTP Request

GET/api/spot/v3/orders/<order_id>

or

GET/api/spot/v3/orders/<client_oid>

Example Request

2018-09-12T07:54:01.582ZGET/api/spot/v3/orders/23356?instrument_id=BTC-USDT

or

2018-09-12T07:54:01.582ZGET/api/spot/v3/orders/e23356?instrument_id=BTC-USDT

Parameters

{
    "client_oid":"oktspot70",
    "created_at":"2019-03-15T02:52:56.000Z",
    "filled_notional":"3.8886",
    "filled_size":"0.001",
    "funds":"",
    "instrument_id":"BTC-USDT",
    "notional":"",
    "order_id":"2482659399697408",
    "order_type":"0",
    "price":"3927.3",
    "price_avg":"3927.3",
    "product_id":"BTC-USDT",
    "side":"buy",
    "size":"0.001",
    "status":"filled",
    "state":"2",
    "timestamp":"2019-03-15T02:52:56.000Z",
    "type":"limit"
}

Trade Fee

Obtain the transaction fee rate corresponding to your current account transaction level. The sub-account rate under the parent account is the same as the parent account. Update every day at 0am

Rate limit: 1 requests per 10 seconds

HTTP Request

GET/api/spot/v3/trade_fee

Example Request

2019-11-12T07:28:43.497ZGET/api/spot/v3/trade_fee

{
    "maker": "0.001",
    "taker": "0.0015",
    "timestamp": "2019-12-05T09:06:20.260Z"
}

Transaction Details

Get details of the recent filled orders. Cursor pagination is used. All paginated requests return the latest information (newest) as the first page sorted by newest (in chronological time) first. This API can retrieve data in the last 3 months.

Rate limit: 20/2s

HTTP Requests

GET /api/spot/v3/fills

End Certificate Example Request

2018-09-12T07:56:11.922ZGET/api/spot/v3/fills?order_id=23212&instrument_id=btc-usdt&limit=2&from=2&to=4

Requests Parameters

[
    [
        {
            "created_at":"2019-03-15T02:52:56.000Z",
            "exec_type":"T",
            "fee":"0.00000067",
            "instrument_id":"BTC-USDT",
            "ledger_id":"3963052722",
            "liquidity":"T",
            "order_id":"2482659399697408",
            "price":"3888.6",
            "product_id":"BTC-USDT",
            "side":"buy",
            "size":"0.00044694",
            "timestamp":"2019-03-15T02:52:56.000Z"
        },
        {
            "created_at":"2019-03-15T02:52:56.000Z",
            "exec_type":"T",
            "fee":"0.00000082",
            "instrument_id":"BTC-USDT",
            "ledger_id":"3963052721",
            "liquidity":"T",
            "order_id":"2482659399697408",
            "price":"3888.6",
            "product_id":"BTC-USDT",
            "side":"buy",
            "size":"0.00055306",
            "timestamp":"2019-03-15T02:52:56.000Z"
        },
        {
            "created_at":"2019-03-15T02:52:56.000Z",
            "exec_type":"T",
            "fee":"0",
            "instrument_id":"BTC-USDT",
            "ledger_id":"3963052719",
            "liquidity":"T",
            "order_id":"2482659399697408",
            "price":"3888.6",
            "product_id":"BTC-USDT",
            "side":"sell",
            "size":"1.73797088",
            "timestamp":"2019-03-15T02:52:56.000Z"
        },
        {
            "created_at":"2019-03-15T02:52:56.000Z",
            "exec_type":"T",
            "fee":"0",
            "instrument_id":"BTC-USDT",
            "ledger_id":"3963052718",
            "liquidity":"T",
            "order_id":"2482659399697408",
            "price":"3888.6",
            "product_id":"BTC-USDT",
            "side":"sell",
            "size":"2.15062911",
            "timestamp":"2019-03-15T02:52:56.000Z"
        }
    ],
    {
        "before":"3963052722",
        "after":"3963052718"
    }
]

Place Algo Order

Rate limit：40 requests per 2 seconds

HTTP Request

POST /api/spot/v3/order_algo

Example

POST /api/spot/v3/order_algo{"instrument_id":"BTC-USDT","order_type":"1","mode":"1","side":"sell","size":"0.005","trigger_price":"8000","algo_price":"7500"}

Request Parameters

General Parameters

Trigger Order

Trail Order

Iceberg Order (Maximum 6 orders)

TWAP (Maximum 6 orders)

{
    "algo_id": 329967,
    "error_message": "",
    "error_code": "0",
    "result": true
}

Cancel Algo Order

If user use "algo_id" to cancel unfulfilled orders, they can cancel a maximum of 6 iceberg/TWAP or 10 trigger/trail orders at the same time.

Rate limit：20 requests per 2 seconds

HTTP Request

POST /api/spot/v3/cancel_batch_algos

Example

Single Order Cancellation: POST /api/spot/v3/cancel_batch_algos{"instrument_id": "BTC-USDT","order_type":"1","algo_ids": ["1600593327162368"]}

Batch Order Cancellation: POST /api/spot/v3/cancel_batch_algos{"instrument_id": "BTC-USDT","order_type":"1","algo_ids":["1600593327162368","1600593327162369"]}

Request Parameters

{
    "result":true,
    "error_message": "",
    "error_code": "0",
    "instrument_id":"BTC-USDT",
    "order_type":"1",
    "algo_id":"2517062038154240"
}

Get Algo Order List

Obtaining Order List

Rate limit：20 requests per 2 seconds

HTTP Request

GET/api/spot/v3/algo

Example Request

GET/api/spot/v3/algo?instrument_id=BTC-USDT&order_type=1

Parameters

{
    "btc_usdt": [
        {
            "algo_id": "329967",
            "algo_price": "7500",
            "instrument_id": "btc_usdt",
            "mode": "1",
            "order_id": "",
            "order_type": "1",
            "rejected_at": "2019-10-09T15:59:59.000Z",
            "side": "sell",
            "size": "0.005",
            "status": "3",
            "timestamp": "2019-10-08T09:43:56.000Z",
            "trigger_price": "8000"
        },
        {
            "algo_id": "329997",
            "algo_price": "7500",
            "instrument_id": "btc_usdt",
            "mode": "1",
            "order_id": "",
            "order_type": "1",
            "rejected_at": "2019-10-09T15:59:59.000Z",
            "side": "sell",
            "size": "0.005",
            "status": "1",
            "timestamp": "2019-10-08T10:10:44.000Z",
            "trigger_price": "8000"
        }
    ]
}

Public - Trading Pairs

This provides snapshots of market data and is publicly accessible without account authentication.

Retrieves list of trading pairs, trading limit, and unit increment.

Rate limit: 20 Requests per 2 seconds

HTTP Request

GET/api/spot/v3/instruments

Example Request

GET/api/spot/v3/instruments

[
    {
        "base_currency":"BTC",
        "instrument_id":"BTC-USDT",
        "min_size":"0.001",
        "quote_currency":"USDT",
        "size_increment":"0.00000001",
        "tick_size":"0.1"
    },
    {
        "base_currency":"ETH",
        "instrument_id":"ETH-USDT",
        "min_size":"0.001",
        "quote_currency":"USDT",
        "size_increment":"0.000001",
        "tick_size":"0.01"
    }
]

Public - Order Book

Retrieve a trading pair's order book. Pagination is not supported here; the entire orderbook will be returned per request. This is publicly accessible without account authentication. WebSocket is recommended here.

Rate limit: 20 requests per 2 seconds

HTTP Request

GET/api/spot/v3/instruments/<instrument_id>/book

Example Request

GET/api/spot/v3/instruments/BTC-USDT/book?size=5&depth=0.2

Parameters

{
    "asks":[
        [
            "3993.2",
            "0.41600068",
            "1"
        ],
        [
            "3993.4",
            "1.24807818",
            "3"
        ],
        [
            "3993.6",
            "0.03",
            "1"
        ],
        [
            "3993.8",
            "0.03",
            "1"
        ]
    ],
    "bids":[
        [
            "3993",
            "0.15149658",
            "2"
        ],
        [
            "3992.8",
            "1.19046818",
            "1"
        ],
        [
            "3992.6",
            "0.20831389",
            "1"
        ],
        [
            "3992.4",
            "0.01669446",
            "2"
        ]
    ],
    "timestamp":"2019-03-20T03:55:37.888Z"
}

Public - Trading Pairs

Retrieve the latest price snapshot, best bid/ask price, and trading volume in the last 24 hours for all trading pairs. This is publicly accessible without account authentication.

Rate limit: 20 requests per 2 seconds

HTTP Request

GET/api/spot/v3/instruments/ticker

Example Request

GET/api/spot/v3/instruments/ticker

{
    "best_ask": "7222.2",
    "best_bid": "7222.1",
    "instrument_id": "BTC-USDT",
    "product_id": "BTC-USDT",
    "last": "7222.2",
    "last_qty": "0.00136237",
    "ask": "7222.2",
    "best_ask_size": "0.09207739",
    "bid": "7222.1",
    "best_bid_size": "3.61314948",
    "open_24h": "7356.8",
    "high_24h": "7367.7",
    "low_24h": "7160",
    "base_volume_24h": "18577.2",
    "timestamp": "2019-12-11T07:48:04.014Z",
    "quote_volume_24h": "134899542.8"
}

Public - Trading Pair Information

Retrieve the latest price snapshot, best bid/ask price, and trading volume in the last 24 hours for a particular trading pair. This is publicly accessible without account authentication.

Rate limit: 20 requests per 2 seconds

HTTP Request

GET/api/spot/v3/instruments/<instrument_id>/ticker

Example Request

GET/api/spot/v3/instruments/BTC-USDT/ticker

Parameters

{
    "best_ask": "7222.2",
    "best_bid": "7222.1",
    "instrument_id": "BTC-USDT",
    "product_id": "BTC-USDT",
    "last": "7222.2",
    "last_qty": "0.00136237",
    "ask": "7222.2",
    "best_ask_size": "0.09207739",
    "bid": "7222.1",
    "best_bid_size": "3.61314948",
    "open_24h": "7356.8",
    "high_24h": "7367.7",
    "low_24h": "7160",
    "base_volume_24h": "18577.2",
    "timestamp": "2019-12-11T07:48:04.014Z",
    "quote_volume_24h": "134899542.8"
}

Public - Filled Orders

Retrieve the latest 60 transactions of all trading pairs.

Rate limit: 20 requests per 2 seconds

HTTP Request

GET/api/spot/v3/instruments/<instrument_id>/trades

Example Request

2018-09-12T07:58:34.414ZGET/api/spot/v3/instruments/LTC-USDT/trades?limit=20

Parameters

[
    {
        "time":"2019-04-12T02:07:30.523Z",
        "timestamp":"2019-04-12T02:07:30.523Z",
        "trade_id":"1296412902",
        "price":"4913.4",
        "size":"0.00990734",
        "side":"buy"
    },
    {
        "time":"2019-04-12T02:07:30.455Z",
        "timestamp":"2019-04-12T02:07:30.455Z",
        "trade_id":"1296412899",
        "price":"4913.2",
        "size":"0.17820096",
        "side":"sell"
    }
]

Public - Market Data

Retrieve the candlestick charts of the trading pairs. This API can retrieve the latest 2000 entries of data. Candlesticks are returned in groups based on requested granularity. Maximum of 1440 entries can be retrieved.

Rate limit: 20 requests per 2 seconds

HTTP Request

GET/api/spot/v3/instruments/<instrument_id>/candles

Example Request

GET/api/spot/v3/instruments/BTC-USDT/candles?granularity=86400&start=2019-03-19T16:00:00.000Z&end=2019-03-19T16:00:00.000Z

Parameters

[
    [
        "2019-03-19T16:00:00.000Z",
        "3997.3",
        "4031.9",
        "3982.5",
        "3998.7",
        "26175.21141385"
    ],
    [
        "2019-03-18T16:00:00.000Z",
        "3980.6",
        "4014.6",
        "3968.9",
        "3997.3",
        "33053.48725643"
    ]
]

WebSocketAPI

Spot

This is the V3 WebSocket API for spot ，Except for the separate channel of "account", data of other channels is open to token trading users.

General

WebSocket protocol is a new HTML5 protocol, which provides full-duplex communication between web browsers and web servers. Connection can be established after one handshake. Web server can then push business logic data to web browsers.Advantages:

Request header is small in size (around 2 bytes) during communication Since there is no need to create and delete TCP connection repeatedly, it saves resources We strongly recommend developers to use WebSocket API to access market related information and trading depth. Should you have any questions, feel free to contact our support team.

We strongly recommend developers to use WebSocket API to access market related information and trading depth.

All the messages returning from WebSocket API are optimized by Deflate compression. Users are expected to decompress the messages by their own means(Compression and decompression through the inflate algorithm). Please refer to our demo

The connection will break automatically when a network problem occurs

url：wss://real.okex.com:8443/ws/v3?brokerId=

Command Format

Request format：

{"op": "<value>", "args": ["<value1>","<value2>"]}

the value of op 1-- subscribe 2--unsubscribe 3--login

args: the value is the channel name, which can be one or more channels

Successful response format:

  {"event": "<value>","channel":"<value>"}
  {"table":"channel","data":"[{"<value1>","<value2>"}]"}

In the spot/depth channel, the return formats for distinguishing between the first full amount and the subsequent incremental data are:

{"table":"channel", "action":"<value>","data":"[{"<value1>","<value2>"}]"}

Failure response format:

{"event":"error","message":"<error_message>","errorCode":"<errorCode>"}

Subscription

Users may subscribe to one or more channels，The total length of multiple channels should not exceed 4,096 bytes.

{"op": "subscribe", "args": ["<SubscriptionTopic>"]}

Note： the value of <op> is subscribe

The array content of <args> is channel names：<channelname>:<filter>

The <channelname> is composed of business/channel

The value of business is 'spot', and channel is the specific data name of the aforementioned business. If a <channelname> consists of more than one words, they will be connected with an underscore " _ ".

Example：

"spot/ticker:ETH-USDT"or "spot/margin_account:ETH-USDT"

<Filter>> is data filterable. For details, please refer to the description of each channel

Example ：

send:

{"op": "subscribe", "args": ["spot/ticker:ETH-USDT","spot/candle60s:ETH-USDT"]}

response:

 {"event":"subscribe","channel":"spot/ticker:ETH-USDT"}

 {"event":"subscribe","channel":"spot/candle60s:ETH-USDT"}

 {"table":"spot/ticker","data":[{"instrument_id":"ETH-USDT","last":"8.8","best_bid":"3","best_ask":"8.1","open_24h":"5.1","high_24h":"8.8","low_24h":"3","base_volume_24h":"13.77340909",
 "quote_volume_24h":"78.49886361","timestamp":"2018-12-20T03:13:41.664Z"}]}

 {"table":"spot/candle60s","data":[{"candle":["2018-12-20T06:18:00.000Z","8.8","8.8","8.8","8.8","0"],"instrument_id":"ETH-USDT"}]}

Unsubscription

Users can cancel one or more channels.

{"op": "unsubscribe", "args": [<SubscriptionTopic>]}

send：

{"op": "unsubscribe", "args": ["spot/ticker:BTC-USDT", "spot/candle60s:BTC-USDT"]}

response：

{"event":"unsubscribe","channel":"spot/ticker:BTC-USDT"}
{"event":"unsubscribe","channel":"spot/candle60s:BTC-USDT"}

Login

Please refer to the Authentication section to understand how a valid authenticated sign is made with requests.

Login subscription format:

{"op":"login","args":["<api_key>","<passphrase>","<timestamp>","<sign>"]

Response：

{"event":"login","success":true}

Example：

{"op":"login","args":["985d5b66-57ce-40fb-b714-afc0b9787083","123456","1538054050.975",
"7L+zFQ+CEgGu5rzCj4+BdV2/uUHGqddA9pI6ztsRRPs="]}

api_key:'api_key' is apply 'APIKey' for users

passphrase:The passphrase entered when creating the APIKey

timestamp: Must be number of seconds since Unix-epoch in UTC Decimal values are allowed. The timestamp will expire for every 30 seconds. It is recommended to use the time endpoint to retrieve the server time if you find a large discrepancy between your server time and the API server.

sign:It is the authentication string. the description of generating a valid sign can be referred to in the Authentication section.

Example of timestamp:const timestamp = '' + Date.now() / 1000

Example of sign : sign=CryptoJS.enc.Base64.Stringify(CryptoJS.HmacSHA256(timestamp +'GET'+ '/users/self/verify', secret))

methodis preset as'GET'。

requestPath is preset as '/users/self/verify'

If the login fails, the connection will be automatically cut.

Connect limit

Connection limit：once per second

Subscription limit：240 times per hour

If there is no data returned after connection to WebSocket is established, the connection will break in 30 seconds. Users are advised to do the followings:

• Set a timer each time that a response message is received.
• If the timer is triggered, which means that no new message is received within N seconds, send the string 'ping'.
• Expect a ‘pong’ as response message. If the response message is not received within 5 seconds, please signal an error alert or reconnect.

The connection will be cut if there happens a network problem.

Checksum

This function helps users verify the accuracy of depth data.

Every time when depth data is pushed, a timestamp and a checksum value are returned together. A total of 200 entries of depth data will be returned after the subscription is successfully established. And the depth data afterwards is incremental. Each time the incremental data is pushed, the crc 32 value comprised of the first 25 string of latest 200 depth data should be calculated by the users. And the result should be compared with the Checksum value provided together with the latest incremental data. If the Checksum are the same, the connection is correctly established, otherwise please re-subscribe the channel.

The notes of depth aggregation: A total of 200 entries of depth data will be returned after the subscription is successfully established, the depth data received afterwards is incremental. Then the 200 entries of the price of ask & bid array shall be traversed with the incremental data. If the prices match, look at the quantity. If the quantity is 0, then delete the depth data; if the quantity has changed, replace the original data; if the price cannot be matched, sort the entry by the price.

Calculation Description: The value of checksum is a signed integer (32 bit)

1,The following data is aligned with bid and ask, the checksum String will be bid:ask:bid:ask:....

"data": [{
        "instrument_id": "BTC-USDT",
        "asks": [["3366.8", "9", 10],[ "3368","8",3]],
        "bids": [
            ["3366.1", "7", 0],[ "3366","6",3 ]
        ],
        "timestamp": "2018-12-04T09:38:36.300Z",
        "checksum": -1881014294
    }]

The checksum string of this example will be 3366.1:7:3366.8:9:3366:6:3368:8

2,If bid and ask data does not align , the checksum String will be bid:ask:ask:ask:....

"data": [{
        "instrument_id": "BTC-USDT",
        "asks": [["3366.8", "9", 10],[ "3368","8",3],[ "3372","8",3 ]],
        "bids": [
            ["3366.1", "7", 0]
        ],
        "timestamp": "2018-12-04T09:38:36.300Z",
        "checksum": 831078360
    }]

The checksum String of this example will be 3366.1:7:3366.8:9:3368:8:3372:8

The pushed data of depth channel that user receives are:

First 200 entries

{
    "table": "spot/depth",
    "action": "partial",
    "data": [{
        "instrument_id": "ETH-USDT",
        "asks": [
            ["8.8", "96.99999966", 1],
            ["9", "39", 3],
            ["9.5", "100", 1],
            ["12", "12", 1],
            ["95", "0.42973686", 3],
            ["11111", "1003.99999795", 1]
        ],
        "bids": [
            ["5", "7", 4],
            ["3", "5", 3],
            ["2.5", "100", 2],
            ["1.5", "100", 1],
            ["1.1", "100", 1],
            ["1", "1004.9998", 1]
        ],
        "timestamp": "2018-12-18T07:27:13.655Z",
        "checksum": 468410539
    }]
}

Increment：

{
    "table": "spot/depth",
    "action": "update",
    "data": [{
        "instrument_id": "BTC-USDT",
        "asks": [],
        "bids": [
            ["3983", "789", 0, 3]
        ],
        "timestamp": "2018-12-04T09:38:36.300Z",
        "checksum": -1200119424
    }]
}

Channel List

Channels that don't require login

spot/ticker // ticker channel

spot/candle60s // 1mins kline channel

spot/candle180s // 3mins kline channel

spot/candle300s // 5mins kline channel

spot/candle900s // 15mins kline channel

spot/candle1800s // 30mins kline channel

spot/candle3600s // 1hour kline channel

spot/candle7200s // 2hour kline channel

spot/candle14400s // 4hour kline channel

spot/candle21600 // 6hour kline channel

spot/candle43200s // 12hour kline channel

spot/candle86400s // 1day kline channel

spot/candle604800s // 1week kline channel

spot/trade // trade information

spot/depth //depth information,200 entries of depth data for the first time, then increment data

spot/depth5 //depth information, the previous five entries of depth data

Channels that require login

spot/account //User's account information

spot/order //User's order information

User Spot Account

Retrieve the user's spot account information (login authentication required).

send examples

{"op": "subscribe", "args": ["spot/account:BTC"]}

spot/account is the channel name，BTC is the currency

{
    "table":"spot/account",
    "data":[
        {
            "balance":"2.215374581132125",
            "available":"1.632774581132125",
            "currency":"USDT",
            "id":"",
            "hold":"0.5826"
        }
    ]
}

User Orders

Get user's order information , users need to log in first

send examples

{"op": "subscribe", "args": ["spot/order:LTC-USDT"]}

spot/order is channel name ，LTC-USDT is instrument_id

{
    "table":"spot/order",
    "data":[
        {
            "client_oid":"oktspot5",
            "filled_notional":"0",
            "filled_size":"0",
            "instrument_id":"BTC-USDT",
            "last_fill_px":"0",
            "last_fill_qty":"0",
            "last_fill_time":"1970-01-01T00:00:00.000Z",
            "margin_trading":"2",
            "notional":"",
            "order_id":"2666285202473984",
            "order_type":"3",
            "price":"4535.8",
            "side":"buy",
            "size":"0.001",
            "status":"cancelled",
            "timestamp":"2019-04-16T13:11:23.000Z",
            "type":"limit"
        }
    ]
}

Public-Ticker

Retrieve the latest price, best bid & offer and 24-hours trading volume of a single contract,data is pushed every 100ms.

Example Sends：

{"op": "subscribe", "args": ["spot/ticker:ETH-USDT"]}

spot/ticker is channel name ，ETH-USDT is instrument_id

{
    "table":"spot/ticker",
    "data":[
        {
            "instrument_id":"ETH-USDT",
            "last":"146.24",
            "last_qty":"0.082483",
            "best_bid":"146.24",
            "best_bid_size":"0.006822",
            "best_ask":"146.25",
            "best_ask_size":"80.541709",
            "open_24h":"147.17",
            "high_24h":"147.48",
            "low_24h":"143.88",
            "base_volume_24h":"117387.58",
            "quote_volume_24h":"17159427.21",
            "timestamp":"2019-12-11T02:31:40.436Z"
        }
    ]
}

Public-Kline

Retrieve the candlestick data,data is pushed every 500ms.

channel lists：

spot/candle60s // 1mins candlestick

spot/candle180s // 3mins candlestick

spot/candle300s // 5mins candlestick

spot/candle900s // 15mins candlestick

spot/candle1800s // 30mins candlestick

spot/candle3600s // 1hour candlestick

spot/candle7200s // 2hour candlestick

spot/candle14400s // 4hour candlestick

spot/candle21600s // 6hour candlestick

spot/candle43200s // 12hour candlestick

spot/candle86400s // 1day candlestick

spot/candle604800s // 1week candlestick

send examples

{"op": "subscribe", "args": ["spot/candle60s:ETH-USDT"]}

spot/candle60s is channel name，ETH-USDT is instrument_id

{
    "table":"spot/candle60s",
    "data":[
        {
            "candle":[
                "2019-04-16T10:49:00.000Z",
                "162.03",
                "162.04",
                "161.96",
                "161.98",
                "336.452694"
            ],
            "instrument_id":"ETH-USDT"
        }
    ]
}

Public-Trade

Get the filled orders data,it will be pushed when there is transaction data.

Example Send

{"op": "subscribe", "args": ["spot/trade:ETH-USDT"]}

spot/trade is the channel name ，ETH-USDT is instrument_id

{
    "table": "spot/trade",
    "data": [{
        "instrument_id": "ETH-USDT",
        "price": "162.12",
        "side": "buy",
        "size": "11.085",
        "timestamp": "2019-05-06T06:51:24.389Z",
        "trade_id": "1210447366"
    }]
}

Public-Depth5

Back to the previous five entries of depth data,This data is snapshot data per 100 milliseconds.For every 100 milliseconds, we will snapshot and push 5 entries of market depth data of the current order book.

Example Send

{"op": "subscribe", "args": ["spot/depth5:ETH-USDT"]}

spot/depth5 is channel name ，ETH-USDT is instrument_id

{
    "table":"spot/depth5",
    "data":[
        {
            "asks":[
                [
                    "161.96",
                    "7.37567",
                    3
                ],
                [
                    "161.99",
                    "5.185",
                    2
                ],
                [
                    "162",
                    "29.184592",
                    5
                ]
            ],
            "bids":[
                [
                    "161.94",
                    "4.552355",
                    1
                ],
                [
                    "161.89",
                    "11.999998",
                    1
                ],
                [
                    "161.88",
                    "6.585142",
                    3
                ]
            ],
            "instrument_id":"ETH-USDT",
            "timestamp":"2019-04-16T11:03:03.712Z"
        }
    ]
}

Public-Depth

After subscription, 400 entries of market depth data of the order book will first be pushed. Subsequently every 100 milliseconds we will snapshot and push entries that have changed during this time.

send examples

{"op": "subscribe", "args": ["spot/depth:ETH-USDT"]}

spot/depth is channel name ，ETH-USDT is trading pair

 First 200 entries 


{
    "table":"spot/depth",
    "action":"partial",
    "data":[
        {
            "instrument_id":"ETH-USDT",
            "asks":[
                [
                    "162.5",
                    "14.29884",
                    2
                ],
                [
                    "162.51",
                    "2.084362",
                    1
                ],
               ...

                [
                    "168.51",
                    "7.760755",
                    2
                ],
                [
                    "168.57",
                    "0.02",
                    1
                ]
            ],
            "bids":[
                [
                    "162.49",
                    "1.556106",
                    3
                ],
                [
                    "162.47",
                    "0.00913",
                    1
                ],
               ...

                [
                    "155.15",
                    "70",
                    1
                ],
                [
                    "155.13",
                    "3",
                    1
                ]
            ],
            "timestamp":"2019-04-16T10:17:28.507Z",
            "checksum":1141851215
        }
    ]
}

Increment：

{
    "table":"spot/depth",
    "action":"update",
    "data":[
        {
            "instrument_id":"ETH-USDT",
            "asks":[
                [
                    "162.5",
                    "0",
                    0
                ],
                [
                    "162.51",
                    "0",
                    0
                ],
                [
                    "162.52",
                    "0",
                    0
                ],
                [
                    "162.53",
                    "232.105791",
                    1
                ],
                [
                    "162.59",
                    "8",
                    1
                ],
                [
                    "168.66",
                    "0.0016",
                    1
                ],
                [
                    "168.69",
                    "0.006",
                    1
                ],
                [
                    "168.73",
                    "0.002082",
                    1
                ]
            ],
            "bids":[
                [
                    "162.49",
                    "1.512544",
                    2
                ],
                [
                    "162.47",
                    "0.05333",
                    2
                ],
                [
                    "162.3",
                    "5.353085",
                    5
                ],
                [
                    "162.29",
                    "6.569261",
                    12
                ],
                [
                    "162.25",
                    "8.308575",
                    3
                ]
            ],
            "timestamp":"2019-04-16T10:17:29.045Z",
            "checksum":227291232
        }
    ]
}

WS Public Index

WebSocket API public index channel

Ticker

This channel is a public index channel that includes the k-lines and tickers for indices.

The indices currently available are all USD-denominated. The asset list includes: BTC, LTC, ETH, ETC, XRP, EOS, BTG.

Get the public index ticker data

send examples

{"op": "subscribe", "args": ["index/ticker:BTC-USD"]}

index/ticker is channel name ，BTC-USD is token index

{"table":"index/ticker","data":[{"last":"3649.76","high_24h":"3955.4","low_24h":"10","instrument_id":"BTC-USD","open_24h":"3888.68","timestamp":"2018-11-27T10:01:23.341Z"}]}

Kline

Get the kline information

Channel list：

index/candle60s // 1mins kline channel

index/candle180s // 3mins kline channel

index/candle300s // 5mins kline channel

index/candle900s // 15mins kline channel

index/candle1800s // 30mins kline channel

index/candle3600s // 1hour kline channel

index/candle7200s // 2hour kline channel

index/candle14400s // 4hour kline channel

index/candle21600s // 6hour kline channel

index/candle43200s // 12hour kline channel

index/candle86400s // 1day kline channel

index/candle604800s // 1week kline channel

send examples

{"op": "subscribe", "args": ["index/candle60s:BTC-USD"]}
{"op": "subscribe", "args": ["index/candle60s:BTC-USDT"]}

index/candle60s is channel name ，BTC-USD is token index

{"table":"index/candle60s","data":[{"instrument_id":"BTC-USD","candle":["2018-11-27T10:01:23.341Z","3811.31","3811.31","3811.31","3811.31","0"]}]}

error code

error message format：

{"event":"error"," message":" ","errorCode":""}

Example

Questions And Feedback

If you have any questions or suggestions regarding our API, you are more than welcome to give us feedback via this link: (please indicate API v3). We will respond as soon as possible.