/**
 * ADR-406 §19.3 — fold a mission's append-only event log into a `MissionView`.
 *
 * Replay re-checks every control event against the transition table and every
 * observation against its own rules, and verifies the hash chain, so state is
 * a pure function of the log: snapshot + tail and full replay must agree.
 */
import { type ControlEventType, type MissionEvent, type ObservationEventType } from './schemas.js';
import { type MissionView } from './transitions.js';
export declare const GENESIS_HASH: string;
export declare function isControlEvent(type: string): type is ControlEventType;
/** Hash over every field except `hash` itself, chained through `prevHash`. */
export declare function eventHash(event: Omit<MissionEvent, 'hash'>): string;
/** Observation rules; throws `TransitionError`. Observations never change state. */
export declare function checkObservation(view: MissionView, type: ObservationEventType, p: Record<string, unknown>): void;
/** Apply one event; throws `TransitionError` for anything the rules refuse. */
export declare function foldEvent(view: MissionView | null, event: MissionEvent): MissionView;
export declare function replay(events: readonly MissionEvent[], from?: MissionView | null): MissionView | null;
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