data availability . 19, 26, 152
an account on an EVM blockchain which is controlled by an offchain key pair, not smart contract bytecode. . 14, 98, 127
Espresso confirmation layer . 1–3, 8, 11, 14–19, 21, 24, 26, 39, 54, 59, 146
Layer 1. A blockchain which is its own settlement layer , e.g. Ethereum . 14, 16–20, 22, 24, 25, 38, 64, 74, 76–78, 82, 93, 98, 99, 129
Layer 2. A blockchain whose settlement layer is the L1. Often a rollup . . 151
Proof of Stake. . 19, 26
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 . 59, 64, 65, 94, 99, 112, 124, 127, 128, 140, 142