import type { AttemptBeginFailure, AttemptCompletionFailure, AttemptHandle, AttemptLifecyclePort, AttemptOutcome, CompletedAttempt, ProviderTargetIdentity, TransitionResult } from "./contracts.js";
/** Request-scoped owner of opaque, target-bound attempt handles. */
export declare class AttemptLifecycle implements AttemptLifecyclePort {
    #private;
    constructor(generation?: number);
    beginAttempt(target: ProviderTargetIdentity): TransitionResult<AttemptHandle, AttemptBeginFailure>;
    completeAttempt(handle: AttemptHandle, outcome: AttemptOutcome): TransitionResult<CompletedAttempt, AttemptCompletionFailure>;
    close(): void;
}