Kukot is Android Kotlin SDK for KuCoin crypto-currency exchange.

Usage

Basics

SDK API has two separate services, one of which provides an access via API KEY and Secret and the second one is open.

Restricted API service is represented by KuCoinService interface. It provides a neat access to the certain API groups:

• User profile
• Language
• Currency
• Assets
• Trading
• Market

The instance of KuCoinService could be obtained in the following way:

val apiKey = "<your-api-key>"
val secret = "<your-secret>"
val service = KuCoin.create(apiKey, secret)

Open API service is represented by KuCoinInfoService interface and provides and access to a basic exchange information like market ticks, trading markets, coin information, etc.

The instance of KuCoinService could be obtained in the following way:

val infoService = KuCoin.createInfoService()

Examples

Below are few examples of SDK usage which can give a general idea of API capabilities. For more information and detailed documentation see KuCoinService and KuCoinInfoService interfaces.

Get user profile

service.getUserProfile()
        .subscribe { profile -> Log.d("Kukot", "Profile for user with email ${profile.email} retrieved!") }

Change language

service.changeLanguage("en_US")
        .subscribe { Log.d("Kukot", "Language changed!") }

Change currency

service.changeCurrency("EUR")
        .subscribe { Log.d("Kukot", "Currency changed!") }

Get deposit address

service.getCoinDepositAddress("KCS")
        .subscribe { depositAddress -> Log.d("Kukot", "Deposit address: ${depositAddress.address}") }

Withdraw coin

service.withdrawCoin("KCS", 100.0, address)
        .subscribe { Log.d("Kukot", "Withdraw request created!") }

Get coin balance

service.getCoinBalance("KCS")
        .subscribe { coinBalance -> Log.d("Kukot", "You have ${coinBalance.balance} KCS") }

Create buy order

val price = 3.5
val amount = 100.0
service.createBuyOrder("KCS-BTC", price, amount)
        .subscribe { orderId -> Log.d("Kukot", "Buy order with id $orderId created!") }

Get list of active buy orders

service.getActiveBuyOrders("KCS-BTC")
        .subscribe { orders -> Log.d("Kukot", "Found ${orders.size} active buy orders") }

Multiple hosts support

By default Kukot uses production backend environment under the hood but since testing and debugging against production host might not always be a good idea, Kukot provides a way to specify host manually or use one of constants defined in EnvironmentConstants file and visible in the global namespace:

val apiKey = "<your-api-key>"
val secret = "<your-secret>"
val host = DEBUG_PROXY_HOST
val service = KuCoin.create(apiKey, secret, host)

Same works for info service:

val host = DEBUG_PROXY_HOST
val infoService = KuCoin.createInfoService(host)

Threading

Since Kukot uses RxJava2 as a part of its API, all network calls are scheduled automatically in the background thread but user receives results in the Android main thread, which is safe for UI:

val service = KuCoin.create(apiKey, secret)
service.getUserProfile() // background thread
            .subscribe({
                textView.text = it.email // main thread
            }, {
                Log.e(TAG, "Unable to acquire user profile", it) // main thread
            })

Testing

Kukot is heavily relying on interfaces so you can easily test it by mocking the whole KuCoinService or KuCoinInfoService facades with Mockito or implementing interfaces on your own and passing them around your application code without any hassle.

Sample application

There is a sample application for Android in the current repository which can give a basic idea of how to use SDK. By clicking on the button it simply requests user profile from the KuCoin exchange, retrieves email address and shows it as a Toast message. In order for sample application to work you need to replace API Key and Secret in the MainActivity.kt.

Download

Step 1. Add the JitPack repository to your build file Add it in your root build.gradle at the end of repositories:

allprojects {
	repositories {
		...
		maven { url 'https://jitpack.io' }
	}
}

Step 2. Add the dependency

dependencies {
        implementation 'com.github.abohomol:kukot:1.0.0'
}

License

Copyright 2018 Anton Bohomol

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.