import type { DurationSpec, WorkflowWaitToken } from "../types/index.js";
export type WorkflowRuntimeNow = () => Date | string;
export declare function createTimestampFactory(now?: WorkflowRuntimeNow): () => string;
export declare function resolveWaitTokenExpiry(timeout: DurationSpec | undefined, createdAt: string): Pick<WorkflowWaitToken, "expiresAt">;
export declare function timestampToMillis(value: Date | string): number;
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