Keysets

​A Keyset specifies the public keys of Committee members and the number of signatures required for a Data Availability Certificate to be valid. Keysets make Committee membership changes possible and provide Committee members the ability to change their keys.

A Keyset contains

• the number of Committee members, and

• for each Committee member, a BLS public key, and

• the number of Committee signatures required.

Keysets are identified by their hashes.

An L2 KeysetManager contract maintains a list of currently valid Keysets. The L3 chain's Owner can add or remove Keysets from this list. When a Keyset becomes valid, the KeysetManager contract emits an L2 event containing the Keyset's hash and full contents. This allows the contents to be recovered later by anyone, given only the Keyset hash.

Although the API does not limit the number of Keysets that can be valid at the same time, normally only one Keyset will be valid.