export interface ProvenanceTimelinePatch {
    readonly lamport: number;
    readonly ops: readonly unknown[];
}
export interface ProvenanceTimelinePort {
    readonly patchesFor: (entityId: string) => Promise<readonly string[]>;
    readonly loadPatchBySha: (sha: string) => Promise<ProvenanceTimelinePatch>;
}
export declare function assertProvenanceTimelinePort(impl: unknown): asserts impl is ProvenanceTimelinePort;
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