data availability . 20, 27, 182
an account on an EVM blockchain which is controlled by an offchain key pair, not smart contract bytecode. . 16, 108, 153
Espresso confirmation layer . 1–3, 8, 12, 15–20, 22, 25, 27, 40, 61, 66, 176
Layer 1. A blockchain which is its own settlement layer , e.g. Ethereum . 15–21, 23, 25, 26, 39, 71, 82–86, 89, 103, 108, 109, 132, 137, 141, 145–147, 156
Layer 2. A blockchain whose settlement layer is the L1. Often a rollup . . 181
Proof of Stake. . 20, 27
state transition function. A determinstic function which derives some state from a parent state and an input. Usually used in the context of rollups or state machine replication . 1, 2, 7
a computing environment which is capable of producing unforgeable proofs (called attestations) that certain data was produced by executing specific code . 66, 72, 105, 109, 122, 151, 153–156, 171, 172