Sol4j 👾

Pure java lib for interacting with Solana RPC API.

The library supports both legacy and versioned transactions and provides a set of core programs for interacting with the Solana blockchain.

Requirements

- Java 11+

Dependencies

• OkHttp
• Jackson
• net.i2p.crypto.eddsa

OutOfBox supported methods

HTTP

Under active development

• getAccountInfo ✅
• getBalance ✅
• getBlock ✅
• getBlockCommitment ✅
• getBlockHeight ✅
• getBlockProduction ✅
• getBlocks ✅
• getBlocksWithLimit ✅
• getBlockTime ✅
• getClusterNodes ✅
• getEpochInfo ✅
• getEpochSchedule ✅
• getFeeForMessage ✅
• getFirstAvailableBlock ✅
• getGenesisHash ✅
• getHealth ✅
• getHighestSnapshotSlot ✅
• getIdentity ✅
• getInflationGovernor ✅
• getInflationRate ✅
• getInflationReward ✅
• getLargestAccounts ✅
• getLatestBlockhash ✅
• getLeaderSchedule ✅
• getMaxRetransmitSlot ✅
• getMaxShredInsertSlot ✅
• getMinimumBalanceForRentExemption ❌
• getMultipleAccounts ✅
• getProgramAccounts ✅
• getRecentPerformanceSamples ❌
• getRecentPrioritizationFees ❌
• getSignaturesForAddress ✅
• getSignatureStatuses ❌
• getSlot ❌
• getSlotLeader ❌
• getSlotLeaders ❌
• getStakeMinimumDelegation ✅
• getSupply ❌
• getTokenAccountBalance ✅
• getTokenAccountsByDelegate ✅
• getTokenAccountsByOwner ✅
• getTokenLargestAccounts ✅
• getTokenSupply ❌
• getTransaction ✅
• getTransactionCount ✅
• getVersion ✅
• getVoteAccounts ❌
• isBlockhashValid ✅
• minimumLedgerSlot ✅
• requestAirdrop ❌
• sendTransaction ✅
• simulateTransaction ❌

WebSocket

Not implemented yet

Getting started

Installation

<dependency>
    <groupId>io.github.maxmmin</groupId>
    <artifactId>sol4j</artifactId>
    <version>1.3.91</version>
</dependency>

Creating gateway

RpcGateway rpcGateway = HttpRpcGateway.create("https://api.mainnet-beta.solana.com");

Creating RPC Client

RpcClient client = RpcClient.create(rpcGateway);

Making requests

List<SolanaNodeInfo> nodes = client.getClusterNodes().send();

Multiple encodings support for specific methods

GetTransactionRequest txRequest = client.getTransaction(txSignature);

var defaultEncodedTx = txRequest.send();
BaseEncConfirmedTransaction base58EncodedTx = txRequest.base58();
BaseEncConfirmedTransaction base64EncodedTx = txRequest.base64();
JsonConfirmedTransaction jsonEncodedTx = txRequest.json();
JsonParsedConfirmedTransaction jsonParsedEncTx = txRequest.jsonParsed();

Transferring lamports via SystemProgram

Account sender = Account.fromSecretKey(secretKey);
PublicKey receiverPubkey = PublicKey.fromBase58("2ZqPxLUgUFLCyQdqokCNJqnhb4kLY7Bn8T28ABQAjfq4");
BigInteger lamports = BigInteger.valueOf(3000);

Message txMessage = Message.builder()
        .addInstruction(SystemProgram.transfer(new SystemProgram.TransferParams(sender.getPublicKey(), receiverPubkey, lamports)))
        .setBlockHash(rpcClient.getLatestBlockhash().send().getBlockhash())
        .setFeePayer(sender.getPublicKey())
        .build();

Transaction transaction = Transaction.build(txMessage, sender);
String txId = rpcClient.sendTransaction(transaction).base64();