Glossary OS

Plain meaning

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An RPC connection routed through a validator or RPC node that holds delegated stake, granting the connection higher priority under Solana's Stake-Weighted Quality of Service (SWQoS) system. Transactions submitted via staked connections receive preferential bandwidth allocation to the leader's TPU, significantly improving landing rates during periods of network congestion. RPC providers like Helius and Triton offer staked connections as a premium feature for production applications.

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Technical context

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

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Staked Connection (staked-connection)
Category: Infrastructure
Definition: An RPC connection routed through a validator or RPC node that holds delegated stake, granting the connection higher priority under Solana's Stake-Weighted Quality of Service (SWQoS) system. Transactions submitted via staked connections receive preferential bandwidth allocation to the leader's TPU, significantly improving landing rates during periods of network congestion. RPC providers like Helius and Triton offer staked connections as a premium feature for production applications.
Related: Stake-Weighted QoS (SWQoS), RPC Node, Transaction Landing

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Concept graph

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Branch

Stake-Weighted QoS (SWQoS)

A Quality of Service system introduced in Solana that allocates TPU packet bandwidth to staked validators proportionally to their stake weight, preventing unstaked or lightly staked nodes from flooding leaders with transactions at the expense of stake-backed traffic. Validators that have delegated stake can forward transactions and receive preferential access to leader bandwidth, making it economically meaningful to route transactions through staked RPC or validator nodes. SWQoS is a key defense against spam and denial-of-service attacks that plagued Solana during high-traffic periods.

Stake Validator

Open term

Branch

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.

RPC (Remote Procedure Call)

Open term

Branch

Transaction Landing

The outcome of a transaction being successfully included and confirmed in a Solana block, as opposed to being dropped, expiring, or failing simulation. Landing probability is influenced by priority fee competitiveness, blockhash freshness (must be within ~150 slots of creation), submission routing (direct to leader vs. RPC rebroadcast), and network congestion on the accounts involved. Developers optimize landing rates by using current-leader TPU endpoints, setting appropriate priority fees, and preflight-checking transactions before submission.

Transaction Priority Fee

Open term

Next concepts to explore

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Network

Stake-Weighted QoS (SWQoS)

A Quality of Service system introduced in Solana that allocates TPU packet bandwidth to staked validators proportionally to their stake weight, preventing unstaked or lightly staked nodes from flooding leaders with transactions at the expense of stake-backed traffic. Validators that have delegated stake can forward transactions and receive preferential access to leader bandwidth, making it economically meaningful to route transactions through staked RPC or validator nodes. SWQoS is a key defense against spam and denial-of-service attacks that plagued Solana during high-traffic periods.

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

Network

Transaction Landing

The outcome of a transaction being successfully included and confirmed in a Solana block, as opposed to being dropped, expiring, or failing simulation. Landing probability is influenced by priority fee competitiveness, blockhash freshness (must be within ~150 slots of creation), submission routing (direct to leader vs. RPC rebroadcast), and network congestion on the accounts involved. Developers optimize landing rates by using current-leader TPU endpoints, setting appropriate priority fees, and preflight-checking transactions before submission.

Open term

Infrastructure

Transaction Request (Solana Pay)

A Solana Pay protocol flow in which a QR code or link encodes an HTTPS URL; when scanned, the wallet performs a GET request to discover metadata (label, icon) and then a POST request with the user's public key, receiving a base64-encoded partially-signed transaction that the wallet can inspect, sign, and submit. This dynamic model enables programmable commerce flows such as NFT minting, coupon redemption, and multi-step checkout because the merchant server constructs the transaction at request time rather than encoding it statically.

Open term

Related terms

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Networkstake-weighted-qos

Stake-Weighted QoS (SWQoS)

A Quality of Service system introduced in Solana that allocates TPU packet bandwidth to staked validators proportionally to their stake weight, preventing unstaked or lightly staked nodes from flooding leaders with transactions at the expense of stake-backed traffic. Validators that have delegated stake can forward transactions and receive preferential access to leader bandwidth, making it economically meaningful to route transactions through staked RPC or validator nodes. SWQoS is a key defense against spam and denial-of-service attacks that plagued Solana during high-traffic periods.

Open term

Infrastructurerpc-node

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

Networktransaction-landing

Transaction Landing

The outcome of a transaction being successfully included and confirmed in a Solana block, as opposed to being dropped, expiring, or failing simulation. Landing probability is influenced by priority fee competitiveness, blockhash freshness (must be within ~150 slots of creation), submission routing (direct to leader vs. RPC rebroadcast), and network congestion on the accounts involved. Developers optimize landing rates by using current-leader TPU endpoints, setting appropriate priority fees, and preflight-checking transactions before submission.

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