Glossary OS

Plain meaning

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A Helius proprietary ultra-low-latency streaming product built on Geyser plugin infrastructure that delivers real-time transaction and account update notifications directly from validator nodes to subscribers, targeting sub-10ms delivery latency from transaction processing to client receipt. LaserStream is positioned for latency-critical applications such as liquidation bots, arbitrage systems, and real-time portfolio trackers that need faster and more reliable data delivery than standard WebSocket subscriptions.

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Technical context

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RPCs, validators, snapshots, indexing, and network plumbing.

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LaserStream (laserstream)
Category: Infrastructure
Definition: A Helius proprietary ultra-low-latency streaming product built on Geyser plugin infrastructure that delivers real-time transaction and account update notifications directly from validator nodes to subscribers, targeting sub-10ms delivery latency from transaction processing to client receipt. LaserStream is positioned for latency-critical applications such as liquidation bots, arbitrage systems, and real-time portfolio trackers that need faster and more reliable data delivery than standard WebSocket subscriptions.
Related: Helius, Geyser Plugin

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Helius

A Solana-focused infrastructure provider offering dedicated RPC nodes, DAS API access, Geyser-based webhooks, the LaserStream ultra-low-latency streaming product, and enhanced transaction parsing APIs that decode raw instruction data into human-readable event objects. Helius is widely used by developers for its generous free tier, Solana-specific tooling (NFT APIs, token metadata enrichment), and reliable globally distributed RPC endpoints.

RPC Node DAS (Digital Asset Standard) API

Open term

Branch

Geyser Plugin

A Solana validator plugin interface (defined in solana-geyser-plugin-interface) that allows external processes to receive a real-time stream of every account update, transaction, slot status change, and block notification directly from the validator's internal processing pipeline via shared-memory callbacks, bypassing the RPC layer entirely. Geyser is the foundation for high-performance indexers, custom databases, and streaming infrastructure like Yellowstone gRPC, because it delivers data at validator speed with zero polling overhead.

Validator Yellowstone gRPC

Open term

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Infrastructure

Helius

A Solana-focused infrastructure provider offering dedicated RPC nodes, DAS API access, Geyser-based webhooks, the LaserStream ultra-low-latency streaming product, and enhanced transaction parsing APIs that decode raw instruction data into human-readable event objects. Helius is widely used by developers for its generous free tier, Solana-specific tooling (NFT APIs, token metadata enrichment), and reliable globally distributed RPC endpoints.

Open term

Infrastructure

Geyser Plugin

A Solana validator plugin interface (defined in solana-geyser-plugin-interface) that allows external processes to receive a real-time stream of every account update, transaction, slot status change, and block notification directly from the validator's internal processing pipeline via shared-memory callbacks, bypassing the RPC layer entirely. Geyser is the foundation for high-performance indexers, custom databases, and streaming infrastructure like Yellowstone gRPC, because it delivers data at validator speed with zero polling overhead.

Open term

Infrastructure

logsSubscribe

A WebSocket subscription method that streams transaction log messages in real time as transactions are processed by the cluster, filterable by 'all' (every transaction), 'allWithVotes' (including vote transactions), or a specific program public key. It is the lowest-latency way for bots and monitoring systems to react to on-chain events emitted via Solana's msg! macro or Anchor's emit! macro without running a full validator or Geyser plugin.

Open term

Infrastructure

IPFS

A peer-to-peer hypermedia protocol that addresses content by cryptographic hash (CID) rather than location, so the same content always resolves to the same CID regardless of which node serves it. In Solana NFT contexts, IPFS is used as an alternative to Arweave for storing off-chain metadata and media, commonly accessed via pinning services like Pinata or NFT.Storage; however, content availability depends on active pinning, making it less permanent than Arweave's endowment model without a dedicated pinning arrangement.

Open term

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Infrastructurelogs-subscribe

logsSubscribe

A WebSocket subscription method that streams transaction log messages in real time as transactions are processed by the cluster, filterable by 'all' (every transaction), 'allWithVotes' (including vote transactions), or a specific program public key. It is the lowest-latency way for bots and monitoring systems to react to on-chain events emitted via Solana's msg! macro or Anchor's emit! macro without running a full validator or Geyser plugin.

Open term

Related terms

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Infrastructurehelius

Helius

A Solana-focused infrastructure provider offering dedicated RPC nodes, DAS API access, Geyser-based webhooks, the LaserStream ultra-low-latency streaming product, and enhanced transaction parsing APIs that decode raw instruction data into human-readable event objects. Helius is widely used by developers for its generous free tier, Solana-specific tooling (NFT APIs, token metadata enrichment), and reliable globally distributed RPC endpoints.

Open term

Infrastructuregeyser

Geyser Plugin

A Solana validator plugin interface (defined in solana-geyser-plugin-interface) that allows external processes to receive a real-time stream of every account update, transaction, slot status change, and block notification directly from the validator's internal processing pipeline via shared-memory callbacks, bypassing the RPC layer entirely. Geyser is the foundation for high-performance indexers, custom databases, and streaming infrastructure like Yellowstone gRPC, because it delivers data at validator speed with zero polling overhead.

Open term

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Infrastructure

RPC (Remote Procedure Call)

The JSON-RPC 2.0 protocol interface through which clients communicate with Solana nodes to query chain state, submit transactions, and subscribe to events. Solana exposes a rich set of HTTP and WebSocket endpoints (e.g., getAccountInfo, sendTransaction) that abstract direct peer-to-peer network participation, making RPC the primary integration point for wallets, dApps, and indexers.

Open term

Infrastructure

RPC Node

A Solana full node that stores ledger state and serves JSON-RPC and WebSocket requests from clients without participating in consensus or voting. RPC nodes must replay every transaction to maintain an accurate account state database, and high-throughput deployments typically run dedicated RPC nodes with large SSDs, high RAM (256 GB+), and high-bandwidth network connections to handle concurrent client load without impacting validator performance.

Open term

Infrastructure

RPC Methods

The enumerated JSON-RPC endpoints exposed by Solana nodes, covering account queries (getAccountInfo, getMultipleAccounts, getProgramAccounts), block and transaction retrieval (getBlock, getTransaction), cluster metadata (getEpochInfo, getSlot, getVersion), and transaction submission (sendTransaction, simulateTransaction). Methods accept a Commitment parameter (processed, confirmed, finalized) to control the recency-vs-safety tradeoff of returned data.

Open term

Infrastructure

getAccountInfo

An RPC method that returns the complete on-chain state of a single account identified by its base-58 public key, including its lamport balance, owner program, executable flag, rent epoch, and raw data payload encoded as base64 or base58. It is the most fundamental read primitive in Solana development and is called at the specified commitment level, with the data field being null if the account does not exist.

Open term