Documentation index

gRPC Unary Methods

Standard request/response methods available alongside streaming subscriptions. These provide the same data as their JSON-RPC equivalents but with significantly lower latency through the Yellowstone Geyser plugin.

Available Methods

Method	Description
GetLatestBlockhash	Returns the latest blockhash for transaction signing
GetBlockHeight	Returns the current block height
GetSlot	Returns the current slot
GetBlock	Returns full block data for a given slot
GetTransaction	Returns transaction details by signature
GetVersion	Returns the Geyser plugin version
GetGenesisHash	Returns the genesis hash
GetFeeForMessage	Returns the fee for a given message
IsBlockhashValid	Checks if a blockhash is still valid
Subscribe	Opens a bidirectional streaming subscription

Commitment Levels

All unary methods accept an optional commitment parameter:

Value	Level	Description
`0`	Processed	Earliest. Node has processed but not confirmed the block.
`1`	Confirmed	Supermajority of the cluster has voted on the block.
`2`	Finalized	Block is confirmed and the supermajority has rooted it.

Quick Example

JavaScript

const grpc = require('@grpc/grpc-js');
const protoLoader = require('@grpc/proto-loader');

const packageDef = protoLoader.loadSync('geyser.proto', {
  keepCase: true, longs: String, enums: String, defaults: true, oneofs: true
});
const proto = grpc.loadPackageDefinition(packageDef).geyser;
const client = new proto.Geyser('88.216.36.108:10001', grpc.credentials.createInsecure());

// Get the latest blockhash
client.getLatestBlockhash({ commitment: 1 }, (err, response) => {
  if (err) { console.error(err); return; }
  console.log('Blockhash:', response.blockhash);
  console.log('Last valid block height:', response.last_valid_block_height);
});

// Get current slot
client.getSlot({ commitment: 1 }, (err, response) => {
  if (err) { console.error(err); return; }
  console.log('Current slot:', response.slot);
});