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.

SolanaJ-Programs

For SolanaJ implementations of popular Solana programs such as Serum, please visit: https://github.com/skynetcap/solanaj-programs

Requirements

Java 17+

Dependencies

bitcoinj
OkHttp
Moshi

Installation

Add Maven dependency:

<dependency>
      <groupId>com.mmorrell</groupId>
      <artifactId>solanaj</artifactId>
      <version>1.17.0</version>
</dependency>

Example

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);

License

MIT License

ImL1s/solanaj