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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.

IDindexer
Plain meaning

Plain meaning

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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.

Mental model

Mental model

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Technical context

Technical context

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

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Indexer (indexer)
Category: Infrastructure
Definition: 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.
Related: Geyser Plugin, DAS (Digital Asset Standard) API, RPC (Remote Procedure Call)
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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.

ValidatorYellowstone gRPC
Open term
Branch

DAS (Digital Asset Standard) API

A unified RPC API specification, originated by Metaplex and adopted by major RPC providers, that provides indexed, queryable access to Solana digital assets including regular NFTs, compressed NFTs (cNFTs), and fungible tokens through methods like getAsset, getAssetsByOwner, getAssetsByGroup, and searchAssets. DAS abstracts away the complexity of reading raw Metaplex account data and reconstructing compressed NFT state from concurrent Merkle trees, making it the standard NFT data layer for wallets and marketplaces.

Compressed NFT (cNFT)
Open term
Branch

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.

RPC NodeRPC Methods
Open term
Next concepts to explore

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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

DAS (Digital Asset Standard) API

A unified RPC API specification, originated by Metaplex and adopted by major RPC providers, that provides indexed, queryable access to Solana digital assets including regular NFTs, compressed NFTs (cNFTs), and fungible tokens through methods like getAsset, getAssetsByOwner, getAssetsByGroup, and searchAssets. DAS abstracts away the complexity of reading raw Metaplex account data and reconstructing compressed NFT state from concurrent Merkle trees, making it the standard NFT data layer for wallets and marketplaces.

Open term
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

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
Commonly confused with

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Infrastructureipfs

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
Related terms

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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
Infrastructuredas

DAS (Digital Asset Standard) API

A unified RPC API specification, originated by Metaplex and adopted by major RPC providers, that provides indexed, queryable access to Solana digital assets including regular NFTs, compressed NFTs (cNFTs), and fungible tokens through methods like getAsset, getAssetsByOwner, getAssetsByGroup, and searchAssets. DAS abstracts away the complexity of reading raw Metaplex account data and reconstructing compressed NFT state from concurrent Merkle trees, making it the standard NFT data layer for wallets and marketplaces.

Open term
Infrastructurerpc

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
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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