Layer 1, Layer 2 and the route between.
Follow the thread from a base chain to a rollup, learn how rollup designs differ and see what crossing a bridge involves.
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Start this threadLayer 1
A blockchain's base network, responsible for its own consensus and canonical state.
Layer 2
A system that processes activity outside a base blockchain while relying on it for key security or settlement functions.
Rollup
A scaling system that executes transactions separately and publishes required data and commitments to a base chain.
Optimistic rollup
A rollup that accepts submitted execution results subject to a process for challenging invalid results.
Zero-knowledge rollup
A rollup that uses cryptographic validity proofs to demonstrate correct execution of transaction batches.
Bridge
A mechanism for moving assets, asset representations or messages between blockchain environments.
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