/**
 * Portable model of the Android native cancel-before-create buffer.
 * Native Kotlin keeps the authoritative in-process store; this helps services
 * and unit tests reason about the race window.
 */
export interface PendingCancellationEntry<TReason extends string = string> {
    reason: TReason;
    expiresAtMs: number;
}
export declare class PendingCancellationStore<TReason extends string = string> {
    private readonly ttlMs;
    private readonly pending;
    constructor(ttlMs?: number);
    remember(callId: string, reason: TReason, nowMs?: number): void;
    consume(callId: string, nowMs?: number): TReason | null;
    peek(callId: string, nowMs?: number): TReason | null;
    clear(): void;
    private pruneExpired;
}
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