FOUNDATIONAL TECHNOLOGY

Consensus Mechanism

The protocol by which distributed nodes in a blockchain network agree on the current state of the ledger and validate new transactions. Common mechanisms include Proof of Work, Proof of Stake, and Byzantine Fault Tolerance variants used in permissioned chains.

EXAMPLE

Financial regulators require banks to demonstrate understanding of the consensus mechanism underlying any blockchain they use for custody or settlement, as it determines finality risk.

Relevant Roles and Functions

On-chain Role
Chief Blockchain Infrastructure Officer
Head of Blockchain Infrastructure
Function
Blockchain Network Integrations
Node Operations
Smart Contract Infrastructure
Validator Participation
TradFi Equivalent
Core Banking Architecture
Distributed Systems
Payments Infrastructure
Technology

Related Terms

Blockchain

A distributed, immutable ledger that records transactions across a network of computers in cryptographically linked blocks, providing a shared and tamper-resistant source of truth across multiple parties.

Example

By settling trades on blockchain, two counterparties share an identical, real-time record without requiring a central reconciliation agent.

Settlement Finality

The point at which a transaction is irrevocably complete and the transferred assets are unconditionally owned by the recipient. On-chain systems can achieve near-instant finality, replacing the deferred finality of traditional clearinghouses.

Example

On-chain settlement finality eliminates the intraday credit exposures that central counterparties currently absorb on behalf of clearing members.

Permissioned Blockchain

A blockchain network where participation—reading, writing, or validating—is restricted to pre-approved entities. Permissioned chains offer privacy and regulatory control suited to institutional and consortium use cases.

Example

JPM Coin operates on a permissioned blockchain, ensuring only verified institutional counterparties can initiate or receive transfers.