FOUNDATIONAL TECHNOLOGY

Layer 2 (L2)

A network built atop a base-layer blockchain (Layer 1) that processes transactions off the main chain for greater throughput and lower cost, while periodically anchoring state to the underlying chain for security.

EXAMPLE

A bank deploying a high-volume stablecoin payment rail uses an Ethereum L2 to reduce per-transaction costs from dollars to fractions of a cent.

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.

Interoperability

The ability of different blockchain networks, protocols, and traditional financial systems to exchange data and value seamlessly. Institutional adoption depends on cross-chain interoperability solutions that connect permissioned and public blockchains.

Example

Chainlink's Cross-Chain Interoperability Protocol enables banks to move tokenized deposits between different blockchain networks while maintaining a single source of truth for regulatory reporting.

Gas Fee

The fee paid by users to compensate network validators for processing and recording transactions on a blockchain, priced in the network’s native token. High gas fees on congested networks have accelerated institutional adoption of Layer 2 solutions.

Example

Ethereum mainnet gas fees reaching $50 per transaction during peak periods drove institutional payment developers to Layer 2 networks with sub-cent transaction costs.

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.