EIP-8198 -- Beacon Chain Fork Choice¶

Note: This document is a work-in-progress for researchers and implementers.

Introduction¶

EIP-8198 uses get_slot_durations to map wall-clock time to slots across historical slot durations. Deadline helpers convert the inherited basis-point configuration into millisecond offsets using get_slot_duration_ms(EIP8198_FORK_EPOCH). Later forks that change slot duration or duty timing MUST define their own deadline rules.

Note: This specification is built upon Heze.

Helpers¶

Modified get_slot_component_duration_ms¶

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def get_slot_component_duration_ms(basis_points: Uint64) -> Uint64:
    """
    Calculate a slot component's duration using this fork's slot duration,
    rounded to the nearest millisecond.
    """
    # [Modified in EIP8198]
    return (basis_points * SLOT_DURATION_MS_EIP8198 + BASIS_POINTS // 2) // BASIS_POINTS