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Unary Methods

Unary Methods

These are simple request/response gRPC methods (not streaming).

SubscribeReplayInfo

Returns information about the earliest slot available for replay subscriptions.

Parameters: None (empty request message)

first_availableuint64

The first slot available for replay (optional - may be absent if replay is not supported).

typescript
const response = await client.subscribeReplayInfo();
console.log("First available slot:", response.firstAvailable);
python
response = stub.SubscribeReplayInfo(geyser_pb2.SubscribeReplayInfoRequest())
print(f"First available: {response.first_available}")

Ping

Health check that echoes back a count value.

int32required

A counter value to echo back.

countint32

The echoed counter value.

typescript
const response = await client.ping(1);
console.log("Pong:", response);
python
response = stub.Ping(geyser_pb2.PingRequest(count=1))
print(f"Pong: {response.count}")

GetLatestBlockhash

Returns the latest blockhash and last valid block height.

CommitmentLevel

Commitment level: PROCESSED, CONFIRMED, or FINALIZED.

slotuint64
Slot of the blockhash.
blockhashstring
Latest blockhash.
last_valid_block_heightuint64
Last block height at which the blockhash is valid.
typescript
const response = await client.getLatestBlockhash(CommitmentLevel.CONFIRMED);
console.log(`Blockhash: ${response.blockhash}`);
console.log(`Valid until block: ${response.lastValidBlockHeight}`);
python
response = stub.GetLatestBlockhash(
    geyser_pb2.GetLatestBlockhashRequest(commitment=geyser_pb2.CONFIRMED)
)
print(f"Blockhash: {response.blockhash}")
print(f"Valid until: {response.last_valid_block_height}")

GetBlockHeight

Returns the current block height.

CommitmentLevel

Commitment level.

block_heightuint64
Current block height.
typescript
const response = await client.getBlockHeight(CommitmentLevel.CONFIRMED);
console.log(`Block height: ${response.blockHeight}`);
python
response = stub.GetBlockHeight(
    geyser_pb2.GetBlockHeightRequest(commitment=geyser_pb2.CONFIRMED)
)
print(f"Block height: {response.block_height}")

GetSlot

Returns the current slot.

CommitmentLevel

Commitment level.

slotuint64
Current slot number.
typescript
const response = await client.getSlot(CommitmentLevel.CONFIRMED);
console.log(`Current slot: ${response.slot}`);
python
response = stub.GetSlot(
    geyser_pb2.GetSlotRequest(commitment=geyser_pb2.CONFIRMED)
)
print(f"Current slot: {response.slot}")

IsBlockhashValid

Checks whether a given blockhash is still valid.

stringrequired

The blockhash to validate.

CommitmentLevel

Commitment level.

slotuint64
Slot at which validity was checked.
validbool
true if the blockhash is still valid.
typescript
const response = await client.isBlockhashValid("YOUR_BLOCKHASH");
console.log(`Valid: ${response.valid}, Slot: ${response.slot}`);
python
response = stub.IsBlockhashValid(
    geyser_pb2.IsBlockhashValidRequest(
        blockhash="YOUR_BLOCKHASH",
        commitment=geyser_pb2.CONFIRMED
    )
)
print(f"Valid: {response.valid}, Slot: {response.slot}")

GetVersion

Returns the Yellowstone gRPC server version.

Parameters: None

versionstring
Server version string.
typescript
const response = await client.getVersion();
console.log(`Version: ${response.version}`);
python
response = stub.GetVersion(geyser_pb2.GetVersionRequest())
print(f"Version: {response.version}")