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Plain meaning

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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.

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Technical context

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

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Geyser Plugin (geyser)
Category: Infrastructure
Definition: 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.
Related: Validator, Yellowstone gRPC, Indexer

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Concept graph

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Branch

Validator

A node that participates in the Solana network by validating transactions, voting on blocks, and (when selected as leader) producing new blocks. Validators run the Agave, Firedancer, or Jito client software, require significant hardware (128+ GB RAM, high-core CPU, NVMe SSD), and earn rewards from inflation and transaction fees.

Vote Account Stake

Open term

Branch

Yellowstone gRPC

An open-source Geyser plugin implementation by Triton One that re-exposes the validator's internal event stream over a gRPC/Protobuf interface, enabling clients to subscribe to filtered streams of account updates, transactions, and slot notifications with sub-millisecond latency from the validator. It has become the de facto streaming standard for Solana MEV bots, high-frequency trading systems, and indexers that require lower latency and richer filtering than WebSocket subscriptions provide.

gRPC

Open term

Branch

Indexer

A specialized off-chain service that continuously ingests on-chain data (typically via a Geyser plugin or RPC polling) and stores it in a queryable database optimized for complex lookups, aggregations, and historical queries that the RPC node's account-state store cannot efficiently serve. Indexers power DAS APIs, portfolio trackers, analytics dashboards, and DEX order-history features by transforming Solana's append-only ledger into relational or document-oriented schemas with fast secondary indexes.

DAS (Digital Asset Standard) API RPC (Remote Procedure Call)

Open term

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Core Protocol

Validator

A node that participates in the Solana network by validating transactions, voting on blocks, and (when selected as leader) producing new blocks. Validators run the Agave, Firedancer, or Jito client software, require significant hardware (128+ GB RAM, high-core CPU, NVMe SSD), and earn rewards from inflation and transaction fees.

Open term

Infrastructure

Yellowstone gRPC

An open-source Geyser plugin implementation by Triton One that re-exposes the validator's internal event stream over a gRPC/Protobuf interface, enabling clients to subscribe to filtered streams of account updates, transactions, and slot notifications with sub-millisecond latency from the validator. It has become the de facto streaming standard for Solana MEV bots, high-frequency trading systems, and indexers that require lower latency and richer filtering than WebSocket subscriptions provide.

Open term

Infrastructure

Indexer

A specialized off-chain service that continuously ingests on-chain data (typically via a Geyser plugin or RPC polling) and stores it in a queryable database optimized for complex lookups, aggregations, and historical queries that the RPC node's account-state store cannot efficiently serve. Indexers power DAS APIs, portfolio trackers, analytics dashboards, and DEX order-history features by transforming Solana's append-only ledger into relational or document-oriented schemas with fast secondary indexes.

Open term

Infrastructure

gRPC

A high-performance, open-source remote procedure call framework from Google that uses HTTP/2 for transport and Protocol Buffers (Protobuf) for binary serialization, offering lower latency, smaller message sizes, and bidirectional streaming compared to JSON-RPC over HTTP/1.1. In Solana infrastructure, gRPC is most prominent as the transport layer for Yellowstone, allowing clients to open long-lived streaming subscriptions with server-side filtering while consuming far less bandwidth than equivalent WebSocket subscriptions.

Open term

Related terms

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Core Protocolvalidator

Validator

A node that participates in the Solana network by validating transactions, voting on blocks, and (when selected as leader) producing new blocks. Validators run the Agave, Firedancer, or Jito client software, require significant hardware (128+ GB RAM, high-core CPU, NVMe SSD), and earn rewards from inflation and transaction fees.

Open term

Infrastructureyellowstone

Yellowstone gRPC

An open-source Geyser plugin implementation by Triton One that re-exposes the validator's internal event stream over a gRPC/Protobuf interface, enabling clients to subscribe to filtered streams of account updates, transactions, and slot notifications with sub-millisecond latency from the validator. It has become the de facto streaming standard for Solana MEV bots, high-frequency trading systems, and indexers that require lower latency and richer filtering than WebSocket subscriptions provide.

Open term

Infrastructureindexer

Indexer

A specialized off-chain service that continuously ingests on-chain data (typically via a Geyser plugin or RPC polling) and stores it in a queryable database optimized for complex lookups, aggregations, and historical queries that the RPC node's account-state store cannot efficiently serve. Indexers power DAS APIs, portfolio trackers, analytics dashboards, and DEX order-history features by transforming Solana's append-only ledger into relational or document-oriented schemas with fast secondary indexes.

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