LaserStream gRPC Quickstart

import { subscribe, CommitmentLevel, LaserstreamConfig, SubscribeRequest } from 'helius-laserstream'

async function main() {
    const subscriptionRequest: SubscribeRequest = {
        accounts: {
            "usdc-account": { // user-defined label for this filter
                account: ["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"], // USDC mint account
                owner: [],
                filters: []
            }
        },
        accountsDataSlice: [],
        commitment: CommitmentLevel.CONFIRMED,
        slots: {},
        transactions: {},
        transactionsStatus: {},
        blocks: {},
        blocksMeta: {},
        entry: {}
    };

    const config: LaserstreamConfig = {
        apiKey: 'YOUR_API_KEY', // Replace with your key
        endpoint: 'https://laserstream-mainnet-ewr.helius-rpc.com', // Choose your closest region
    }

    await subscribe(config, subscriptionRequest, async (data) => {
        console.log(data);
    }, async (error) => {
        console.error(error);
    });
}

main().catch(console.error);

import { subscribe, CommitmentLevel, LaserstreamConfig, SubscribeRequest } from 'helius-laserstream'

async function main() {
    const subscriptionRequest: SubscribeRequest = {
        transactions: {
            "token-filter": { // user-defined label for this filter
                accountInclude: ['TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA'],
                accountExclude: [],
                accountRequired: [],
                vote: false,
                failed: false
            }
        },
        commitment: CommitmentLevel.CONFIRMED,
        accounts: {},
        slots: {},
        transactionsStatus: {},
        blocks: {},
        blocksMeta: {},
        entry: {},
        accountsDataSlice: [],
    };

    const config: LaserstreamConfig = {
        apiKey: 'YOUR_API_KEY', // Replace with your key
        endpoint: 'https://laserstream-mainnet-ewr.helius-rpc.com', // Choose your closest region
    }

    await subscribe(config, subscriptionRequest, async (data) => {
        console.log(data);
    }, async (error) => {
        console.error(error);
    });
}

main().catch(console.error);

import { subscribe, CommitmentLevel, LaserstreamConfig, SubscribeRequest } from 'helius-laserstream'

async function main() {
    const subscriptionRequest: SubscribeRequest = {
        entry: {},
        accounts: {},
        accountsDataSlice: [],
        slots: {},
        blocks: {
            blocks: {
                accountInclude: []
            }
        },
        blocksMeta: {},
        transactions: {},
        transactionsStatus: {},
        commitment: CommitmentLevel.CONFIRMED,
    };

    const config: LaserstreamConfig = {
        apiKey: 'YOUR_API_KEY', // Replace with your key
        endpoint: 'https://laserstream-mainnet-ewr.helius-rpc.com', // Choose your closest region
    }

    await subscribe(config, subscriptionRequest, async (data) => {
        console.log(data);
    }, async (error) => {
        console.error(error);
    });
}

main().catch(console.error);

import { subscribe, CommitmentLevel, LaserstreamConfig, SubscribeRequest } from 'helius-laserstream'

async function main() {
    const subscriptionRequest: SubscribeRequest = {
        entry: {},
        accounts: {},
        accountsDataSlice: [],
        slots: {},
        blocks: {},
        blocksMeta: {
            blockmetadata: {}
        },
        transactions: {},
        transactionsStatus: {},
        commitment: CommitmentLevel.CONFIRMED,
    };

    const config: LaserstreamConfig = {
        apiKey: 'YOUR_API_KEY', // Replace with your key
        endpoint: 'https://laserstream-mainnet-ewr.helius-rpc.com', // Choose your closest region
    }

    await subscribe(config, subscriptionRequest, async (data) => {
        console.log(data);
    }, async (error) => {
        console.error(error);
    });
}

main().catch(console.error);

import { subscribe, CommitmentLevel, LaserstreamConfig, SubscribeRequest } from 'helius-laserstream'

async function main() {
    const subscriptionRequest: SubscribeRequest = {
        entry: {
            entrySubscribe: {}  // Subscribe to all entries
        },
        accounts: {},
        accountsDataSlice: [],
        slots: {},
        blocks: {},
        blocksMeta: {},
        transactions: {},
        transactionsStatus: {},
        commitment: CommitmentLevel.CONFIRMED,
    };

    const config: LaserstreamConfig = {
        apiKey: 'YOUR_API_KEY', // Replace with your key
        endpoint: 'https://laserstream-mainnet-ewr.helius-rpc.com', // Choose your closest region
    }

    await subscribe(config, subscriptionRequest, async (data) => {
        console.log(data);
    }, async (error) => {
        console.error(error);
    });
}

main().catch(console.error);

import { LaserstreamClient, CommitmentLevel } from 'helius-laserstream'

async function main() {
    // Create once and reuse: all calls share one connection
    const client = new LaserstreamClient({
        apiKey: 'YOUR_API_KEY', // Replace with your key
        endpoint: 'https://laserstream-mainnet-ewr.helius-rpc.com', // Choose your closest region
    });

    // Commitment is optional (server default when omitted)
    const { slot } = await client.getSlot(CommitmentLevel.CONFIRMED);
    const { blockHeight } = await client.getBlockHeight();
    const bh = await client.getLatestBlockhash(); // { blockhash, slot, lastValidBlockHeight }
    const { valid } = await client.isBlockhashValid(bh.blockhash);
    const { version } = await client.getVersion();
    const { count } = await client.ping(1);
    const { firstAvailable } = await client.subscribeReplayInfo(); // earliest replayable slot

    // uint64 values (slots, heights) are returned as strings
    console.log({ slot, blockHeight, blockhash: bh.blockhash, valid, version, count, firstAvailable });

    client.close();
}

main().catch(console.error);