Node
A blockchain node is software running on a computer that participates in a blockchain network by following the protocol. Depending on its…
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 a transfer of economic value or discharge of an obligation recorded outside the public blockchain, often within a service's…
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 transfer and recording of value through a blockchain's transaction and consensus process. For a merchant, it is the…
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.
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 is an Ethereum layer-2 system that processes transactions outside Ethereum mainnet, publishes necessary data on Ethereum, and relies on…
Oracle
A blockchain oracle supplies information from outside the ledger, such as asset prices, sports results or shipment status, to applications that otherwise…
Oracle Aggregation
Oracle aggregation combines multiple data observations or signed reports into one value using rules designed to reduce noise, errors, and manipulation.
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…