tiago18c / solanaj

Java client for Solana and the Serum DEX.

solanaj

Solana blockchain client, written in pure Java. Solanaj is an API for integrating with Solana blockchain using the Solana RPC API

This fork includes functionality for multiple Solana programs, including the Serum DEX.

Requirements

• Java 11+

Dependencies

• bitcoinj
• OkHttp
• Moshi

Installation

1. Build SolanaJ: mvn clean install -DskipTests
2. To use in another project, add this dependency to Maven:

   <dependency>
           <groupId>org.p2p</groupId>
           <artifactId>solanaj</artifactId>
           <version>1.2-SNAPSHOT</version>
   </dependency>

Example

Required properties (for testing)

secretkey.dat is required to be in the root directory.

Create a solanaj.properties file.

test.solana.pubkey = Pubkey of destination SOL wallet for testing

test.solana.pubkey.source.usdc = Pubkey of private key's USDC wallet

test.solana.pubkey.destination.usdc = Pubkey of destination's USDC wallet

Transfer lamports

RpcClient client = new RpcClient(Cluster.TESTNET);

PublicKey fromPublicKey = new PublicKey("QqCCvshxtqMAL2CVALqiJB7uEeE5mjSPsseQdDzsRUo");
PublicKey toPublickKey = new PublicKey("GrDMoeqMLFjeXQ24H56S1RLgT4R76jsuWCd6SvXyGPQ5");
int lamports = 3000;

Account signer = new Account(secret_key);

Transaction transaction = new Transaction();
transaction.addInstruction(SystemProgram.transfer(fromPublicKey, toPublickKey, lamports));

String signature = client.getApi().sendTransaction(transaction, signer);

Get balance

RpcClient client = new RpcClient(Cluster.TESTNET);

long balance = client.getApi().getBalance(new PublicKey("QqCCvshxtqMAL2CVALqiJB7uEeE5mjSPsseQdDzsRUo"));

Get Serum market + orderbooks

final PublicKey solUsdcPublicKey = new PublicKey("7xMDbYTCqQEcK2aM9LbetGtNFJpzKdfXzLL5juaLh4GJ");
final Market solUsdcMarket = new MarketBuilder()
        .setClient(new RpcClient())
        .setPublicKey(solUsdcPublicKey)
        .setRetrieveOrderBooks(true)
        .build();

final OrderBook bids = solUsdcMarket.getBidOrderBook();

Send a transaction with call to the "Memo" program

// Create account from private key
final Account feePayer = new Account(Base58.decode(new String(data)));
final Transaction transaction = new Transaction();

// Add instruction to write memo
transaction.addInstruction(
        MemoProgram.writeUtf8(feePayer.getPublicKey(),"Hello from SolanaJ :)")
);

String response = result = client.getApi().sendTransaction(transaction, feePayer);

Contribution

Welcome to contribute, feel free to change and open a PR.

License

Solanaj is available under the MIT license. See the LICENSE file for more info.