export interface AiBudgetPriceIdentity {
    currency: string;
    source: string;
    version: string;
}
export interface AiBudgetEstimate {
    totalTokens: number;
    costNanos?: number;
    wallClockMs?: number;
    modelCalls?: number;
    toolCalls?: number;
    price?: AiBudgetPriceIdentity;
    unknownPriceOverrideAuditId?: string;
}
export interface AiBudgetMutationSender {
    reserve(reservationId: string, idempotencyKey: string, estimate: AiBudgetEstimate, createdAt: Date, transitionEventId: string, transitionIdempotencyKey: string): Promise<void>;
    settle(reservationId: string, invocationId: string, settledAt: Date, transitionEventId: string, transitionIdempotencyKey: string): Promise<void>;
    resolve(reservationId: string, evidence: 'provider_call_not_started' | 'outcome_unknown', evidenceSha256: string, resolvedAt: Date, transitionEventId: string, transitionIdempotencyKey: string): Promise<void>;
}
export interface RecoveredAiBudgetSettlement {
    recoveryId: string;
    reservationId: string;
    invocationId: string;
    toolCallId: string;
    evidenceSha256: string;
    settledAt?: Date;
}
export type RecoveredAiBudgetSettlementSender = (settlement: Required<RecoveredAiBudgetSettlement>) => Promise<void>;
export declare class AiBudgetDeniedError extends Error {
    constructor();
}
export declare class AiBudgetReservationHandle {
    readonly reservationId: string;
    private readonly sender;
    private readonly newId;
    constructor(reservationId: string, sender: AiBudgetMutationSender, newId: () => string);
    settle(invocationId: string, settledAt?: Date): Promise<void>;
    /** Release liability only when the provider request was never dispatched. */
    releaseProviderCallNotStarted(evidenceSha256: string, resolvedAt?: Date): Promise<void>;
    /** Preserve liability in RECONCILE when the external outcome is uncertain. */
    markOutcomeUnknown(evidenceSha256: string, resolvedAt?: Date): Promise<void>;
    private resolve;
}
export declare function reserveAiBudget(estimate: AiBudgetEstimate, sender: AiBudgetMutationSender, newId: () => string): Promise<AiBudgetReservationHandle>;