QuarkChain Android SDK

Table of Contents

• Getting Started
  • Adding Quark-Chain Client SDK as a Maven Dependency
  • Basic Usage
• Features at a Glance
  • Create Wallet
  • Import Wallet By Keystore
  • Import Wallet By Private Key
  • Export Keystore
  • Export Private Key
  • QKC Balance
  • Send QKC

Getting Started

Add jitpack to your root gradle file at the end of repositories:

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

Adding Quark-Chain Client SDK as a Maven Dependency

Maven:

<dependency>
	    <groupId>com.github.centerprime</groupId>
	    <artifactId>Quark-Chain-Client-SDK</artifactId>
	    <version>1.0.8</version>
</dependency>

Gradle:

dependencies {
     implementation 'com.github.centerprime:Quark-Chain-Client-SDK:1.0.8'

}

Basic Usage

Once you have the dependencies set up you can start using CenterPrime by creating a Quark-Chain Wallet:

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        QKCManager qkcManager = QKCManager.getInstance();

        qkcManager.createWallet("12345", this)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(wallet -> {
                    String walletAddress = wallet.getAddress();
                    String keystore = wallet.getKeystore();
		    
		    String qckWalletAddress = QKCManager.
                            getQCKAddress(walletAddress,this);
		    int chainId = 1;
		    int shardId = 0;
 	 	    String chainId1 = QKCManager.getQCKAddressByChainIdAndShardId(qckWalletAddress, chainId , shardId, this);
		    
		    
                }, error -> {
                    System.out.println(error);
                });
    }
}

Congratulations! Now you are a CenterPrime user.

Features at a Glance

Create Wallet

You can create Quark-Chain Wallet.

QKCManager qkcManager = QKCManager.getInstance();

qkcManager.createWallet("12345", this)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(wallet -> {
                    String walletAddress = wallet.getAddress();
                    String keystore = wallet.getKeystore();
		   
		    String qckWalletAddress = QKCManager.
                            getQCKAddress(walletAddress,this);
		    int chainId = 1;
		    int shardId = 0;
 	 	    String chainId1 = QKCManager.getQCKAddressByChainIdAndShardId(qckWalletAddress, chainId , shardId, this);

		    
		    
                }, error -> {
                    System.out.println(error);
                });

Import Wallet By Keystore

Import Quark-Chain Wallet by Keystore.

QKCManager qkcManager = QKCManager.getInstance();
String password = "xxxx12345";
String keystore = "JSON_FORMAT";
qkcManager.importFromKeystore(keystore, password, this)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(walletAddress -> {

                    Toast.makeText(this, "Wallet Address : " + walletAddress, Toast.LENGTH_SHORT).show();

                }, error -> {

                });

Import Wallet By Private Key

Import Wallet By Private Key.

QKCManager qkcManager = QKCManager.getInstance();
String privateKey = "PRIVATE_KEY";
qkcManager.importFromPrivateKey(privateKey, this)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(walletAddress -> {

                    Toast.makeText(this, "Wallet Address : " + walletAddress, Toast.LENGTH_SHORT).show();

                }, error -> {

                });

Export Keystore

If you want to export wallet address’s keystore you can use a code written below.

QKCManager qkcManager = QKCManager.getInstance();
String walletAddress = "WALLET_ADDRESS";
qkcManager.getKeyStore(walletAddress, this)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(keystore -> {

                    Toast.makeText(this, "Keystore : " + keystore, Toast.LENGTH_SHORT).show();

                }, error -> {

                });

Export Private Key

If you want to export wallet address’s private key you can use a code written below.

QKCManager qkcManager = QKCManager.getInstance();
String walletAddress = "WALLET_ADDRESS";
String password = "WALLET_PASSWORD";
qkcManager.getPrivateKeyForQW(walletAddress, password, this)
        .subscribeOn(Schedulers.io())
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe(privateKey -> {
                       
            Pair<BigInteger, BigInteger> privateKeyT = privateKey;
	    Toast.makeText(this, privateKeyT.first.toString(16), Toast.LENGTH_SHORT).show();

        }, error -> {
            Toast.makeText(this, error.getMessage(), Toast.LENGTH_SHORT).show();
        });
});

QKC Balance

QKC Balance.

QKCManager qkcManager = QKCManager.getInstance();
qkcManager.init("http://jrpc.mainnet.quarkchain.io:38391");
String walletAddress = "WALLET_ADDRESS";
qkcManager.getQKCBalance(walletAddress)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(balance -> {

                    Toast.makeText(this, "QKC Balance : " + balance, Toast.LENGTH_SHORT).show();

                }, error -> {

                });

Send QKC

Send QKC.

QKCManager qkcManager = QKCManager.getInstance();
qkcManager.init("http://jrpc.mainnet.quarkchain.io:38391");
String walletAddress = "WALLET_ADDRESS";
String password = "WALLET_PASSWORD";
BigInteger gasPrice = new BigInteger("GAS_PRICE");
BigInteger gasLimit = new BigInteger("GAS_LIMIT");
BigDecimal qkcAmount = new BigDecimal("QKC_AMOUNT");
String fromAddress = "SENDER_WALLET_ADDRESS";
String receiverAddress = "RECEIVER_WALLET_ADDRESS";
qkcManager.sendQKCToken(walletAddress, password, fromAddress, receiverAddress,gasPrice, gasLimit, qkcAmount, this)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(tx -> {

                    Toast.makeText(this, "TX : " + tx, Toast.LENGTH_SHORT).show();

                }, error -> {

                });