Node
A node is a computer running protocol software that communicates with peers and performs one or more blockchain network roles. Full nodes…
Blockchain Networks & Protocols
Networks, consensus systems, protocols and blockchain infrastructure.
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Terms (543)
Node Client
A node client is a software implementation of blockchain networking, validation, consensus, execution, storage, and API rules for operating a node. Some…
Node Emulator
A node emulator reproduces selected blockchain node interfaces and behavior for local development, integration testing, demonstrations, or failure simulation. Emulation is usually…
Node Operator Staker
A node operator staker commits or delegates stake to support a node operator's participation, security obligations, or eligibility for rewards. The relationship…
Node Provider
A node provider offers managed blockchain nodes, RPC endpoints, APIs, indexing, or infrastructure so applications can access networks without operating every component.…
Nonce Account
A nonce account is a Solana System Program account that stores a durable nonce and authority for delayed or offline-signed transactions. The…
Oasis Network (ROSE)
Oasis Network is a proof-of-stake Layer 1 separating consensus from parallel ParaTime runtimes, with ROSE used for fees, staking, and delegation. Sapphire…
Off-Chain
Off-chain describes data, computation, communication, or transactions handled outside a blockchain's directly recorded, consensus-validated state and execution environment. Security depends on how…
Off-Chain Settlement
Off-chain settlement is the discharge or recording of a financial obligation outside a base blockchain’s canonical ledger. It may occur on a…
Off-Chain Swap
An off-chain swap exchanges assets through signed updates, internal ledgers, channels, or coordinated settlement without recording every trading step on-chain. Trust varies…
Offchain Reporting (OCR)
Offchain Reporting is Chainlink's protocol family for aggregating oracle-node observations off-chain and submitting one quorum-signed report for on-chain verification. One node transmits…
Ommer Block
An ommer block is a valid proof-of-work Ethereum block from a noncanonical branch that was referenced and partially rewarded by a canonical…
On-Chain
On-chain describes data, transactions, logic, or state recorded and processed under a blockchain's consensus and publicly verifiable ledger rules. Recording data on-chain…
On-Chain Payment
An on-chain payment transfers value through a transaction recorded and validated directly by a blockchain rather than an internal or channel ledger.…
On-Chain Settlement
On-chain settlement is the completion of an obligation through a transaction recorded on a blockchain and accepted under that network’s confirmation or…
Open Blockchain Network
An open blockchain network permits broad participation in reading, submitting, validating, or building applications under publicly available protocol rules. Openness has several…
Open Network
An open network allows participants to connect, communicate, or use services through published interfaces without case-by-case permission from one operator. The term…
Optimism Bridge
Optimism Bridge is the canonical contract system for depositing assets and messages between Ethereum and OP Mainnet and withdrawing them back. Withdrawals…
Optimism Network
Optimism Network can refer to OP Mainnet or the broader OP Stack ecosystem of Ethereum-aligned rollup chains and shared infrastructure. Each OP…
Optimistic Bridge
An optimistic bridge accepts cross-chain claims provisionally and relies on a challenge period in which observers can prove fraudulent messages or state.…
Optimistic Rollup
An optimistic rollup executes transactions off Ethereum, publishes data and state commitments, and uses fraud proofs to challenge invalid results. Users benefit…
Oracle
An oracle supplies blockchain applications with external data, computation results, or event attestations that the chain cannot determine from its own state.…
Oracle Aggregation
Oracle aggregation combines multiple data observations or signed reports into one value using rules designed to reduce noise, errors, and manipulation. The…
Oracle Commerce
Oracle commerce describes using authenticated external data to automate blockchain-based pricing, fulfillment, settlement, insurance, or contractual business decisions. Automation introduces a dependency…