containers.md

Containers

Config

class Config(Container):
    num_validators: uint64

Checkpoint

class Checkpoint(Container):
    root: Bytes32
    slot: uint64

State

class State(Container):
    config: Config

    latest_justified: Checkpoint
    latest_finalized: Checkpoint

    historical_block_hashes: List[Bytes32, HISTORICAL_ROOTS_LIMIT]
    justified_slots: List[bool, HISTORICAL_ROOTS_LIMIT]

    # Diverged from 3SF-mini.py:
    # Flattened `justifications: Dict[str, List[bool]]` for SSZ compatibility
    justifications_roots: List[Bytes32, HISTORICAL_ROOTS_LIMIT]
    justifications_validators: Bitlist[
        HISTORICAL_ROOTS_LIMIT * VALIDATOR_REGISTRY_LIMIT
    ]

Block

class Block(Container):
    slot: uint64
    parent: Bytes32
    votes: List[Vote, VALIDATOR_REGISTRY_LIMIT]
    state_root: Bytes32

SignedBlock

class SignedBlock(Container):
    data: Block,
    signature: Bytes32,

Vote

class Vote(Container):
    validator_id: uint64
    slot: uint64
    head: Checkpoint
    target: Checkpoint
    source: Checkpoint

SignedVote

class SignedVote(Container):
    data: Vote,
    signature: Bytes32,

Remarks

• The signature type is still to be determined so Bytes32 is used in the interim. The actual signature size is expected to be a lot larger (~3 KiB).