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

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

Creating RPC Client

RpcClientclient = RpcClient.create(rpcGateway);

Making requests

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

Multiple encodings support for specific methods

GetTransactionRequesttxRequest = client.getTransaction(txSignature);
vardefaultEncodedTx = txRequest.send();
BaseEncConfirmedTransactionbase58EncodedTx = txRequest.base58();
BaseEncConfirmedTransactionbase64EncodedTx = txRequest.base64();
JsonConfirmedTransactionjsonEncodedTx = txRequest.json();
JsonParsedConfirmedTransactionjsonParsedEncTx = txRequest.jsonParsed();

Transferring lamports via SystemProgram

Accountsender = Account.fromSecretKey(secretKey);
PublicKeyreceiverPubkey = PublicKey.fromBase58("2ZqPxLUgUFLCyQdqokCNJqnhb4kLY7Bn8T28ABQAjfq4");
BigIntegerlamports = BigInteger.valueOf(3000);
MessagetxMessage = Message.builder()
.addInstruction(SystemProgram.transfer(newSystemProgram.TransferParams(sender.getPublicKey(), receiverPubkey, lamports)))
.setBlockHash(rpcClient.getLatestBlockhash().send().getBlockhash())
.setFeePayer(sender.getPublicKey())
.build();
Transactiontransaction = Transaction.build(txMessage, sender);
StringtxId = rpcClient.sendTransaction(transaction).base64();