Laserstream is currently in private beta and not yet publicly available. Access is limited, and some features may still be under development.
Authorizations
Your Helius API key. You can get one for free in the
dashboard.
Message
The gRPC API supports multiple subscription types that can be combined in a single request:
Subscribe to account updates. Returns data when specified accounts are
modified.
Array of account pubkeys to monitor.
Array of owner pubkeys to monitor (all accounts owned by these programs).
Optional filters to apply.
Filter by specific bytes at an offset in account data.
Position in bytes to start comparing data.
The data to compare against (bytes format).
The data to compare against (base58 format).
The data to compare against (base64 format).
Filter by exact account data size in bytes.
Filter to only token accounts.
Filter by SOL balance with comparisons.
Equal to specified amount.
Not equal to specified amount.
Less than specified amount.
Greater than specified amount.
Include transaction signatures when available.
Subscribe to slot updates.
Filter slots by commitment level.
Include intermediate slot status updates (PROCESSED, CONFIRMED, FINALIZED,
FIRST_SHRED_RECEIVED, COMPLETED, CREATED_BANK, DEAD).
Subscribe to transaction updates.
Include vote transactions.
Include failed transactions.
Monitor specific transaction signature.
Only include transactions affecting these accounts.
Exclude transactions affecting these accounts.
Transactions must affect all of these accounts.
Subscribe to transaction status updates.
Include vote transactions.
Include failed transactions.
Monitor specific transaction signature.
Only include transactions affecting these accounts.
Exclude transactions affecting these accounts.
Transactions must affect all of these accounts.
Subscribe to block updates.
Only include blocks with transactions affecting these accounts.
Include full transaction details.
Subscribe to block metadata updates (lighter than full block updates).
executed_transaction_count
Subscribe to entry updates.
executed_transaction_count
starting_transaction_index
Starting transaction index.
The commitment level for the subscription:
(0): Processed by the current node.
(1): Confirmed by supermajority of the cluster.
(2): Finalized by the cluster.
Specifies partial account data to receive:
Position in bytes to start reading data.
Enable ping-pong messages for connection health monitoring.
Numeric identifier for the ping.
Starting slot to receive updates from. Updates for slots before this value
will be excluded.
{
"slots": {
"slots": {}
},
"accounts": {
"user-defined-label": {
"account": [
"DjUF9ASpyMbVpGJmTvzfSbCgUWj6JowwLh8dGAJzSPmu",
"5U3bH5b6XtG99aVCE9ycvDgBKQx3fVT8WwTNbMToFuEr"
],
"owner": [
"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA"
],
"filter": {
"memcmp": {
"offset": 0,
"bytes": "0102030405"
},
"datasize": 165,
"token_account_state": true,
"lamports": {
"gt": 100000000
}
},
"nonempty_txn_signature": true
}
},
"transactions": {},
"blocks": {},
"blocks_meta": {},
"accounts_data_slice": [],
"commitment": 1
}
Commitment Levels
All subscriptions support the following commitment levels:
PROCESSED: Processed by the current node (0)CONFIRMED: Confirmed by supermajority of the cluster (1)FINALIZED: Finalized by the cluster (2)
Response Structure
Subscription responses include:
filters: The filter names that matched this update- One of the following update types:
account: Account data, owner, lamports, executable status, etc.slot: Slot information and status updatestransaction: Full transaction details, signature, and metadatatransaction_status: Transaction execution status (success/error)block: Complete block data with transactions, accounts, rewards, etc.block_meta: Lightweight block metadata without full transaction detailsentry: Entry details within a blockping/pong: Connection health check messages
created_at: Timestamp when the update was created
{
"filters": ["accounts"],
"account": {
"account": {
"pubkey": "BASE58_ENCODED_PUBKEY",
"lamports": 12345678,
"owner": "BASE58_ENCODED_OWNER",
"executable": false,
"rent_epoch": 361,
"data": "BASE64_ENCODED_DATA",
"write_version": 123,
"txn_signature": "BASE58_ENCODED_SIGNATURE"
},
"slot": 189554321,
"is_startup": false
},
"created_at": "2023-04-28T12:34:56.789Z"
}
