/** Use only when the provider can prove that no effect was applied. Network errors are not proof. */
export declare class ExternalEffectNotAppliedError extends Error {
}
export interface ExternalOperationInput {
    principalId: string;
    capabilityId: string;
    idempotencyKey: string;
    requestDigest: string;
    descriptorDigest: string;
    surface: string;
    recovery: 'manual' | 'provider-idempotent';
    leaseMs?: number;
    now?: () => number;
}
/** The callback must use operationId as the provider key when declaring provider-idempotent recovery. */
export declare function executeExternalOperation<T>(input: ExternalOperationInput, execute: (operationId: string) => Promise<T>, validate?: (result: T) => T): Promise<T>;