import { IDENTITY_LOCK_RELEASE_AFTER, type IdentityLockDeferredRelease } from "./identity-lock.js";
export interface KeyStoreBackend {
    read(service: string, account: string): Promise<string | undefined>;
    write(service: string, account: string, value: string): Promise<void>;
    delete(service: string, account: string): Promise<boolean>;
}
export declare class KeyringReadTimeoutError extends Error {
    constructor(op: string, timeoutMs: number);
}
export declare class KeyringMutationTimeoutError extends Error implements IdentityLockDeferredRelease {
    readonly [IDENTITY_LOCK_RELEASE_AFTER]: Promise<void>;
    constructor(op: string, timeoutMs: number, settled: Promise<void>);
}
export declare function _setKeyringOperationTimeoutForTest(timeoutMs: number | null): void;
export declare function _runKeyringOperationWithTimeoutForTest<T>(operation: Promise<T>, op: string, mutating: boolean, timeoutMs: number): Promise<T>;
export declare function nativeBindingUnavailable(): boolean;
export declare function _setNativeBindingErrorForTest(error: unknown): void;
export declare class NapiKeyringBackend implements KeyStoreBackend {
    read(service: string, account: string): Promise<string | undefined>;
    write(service: string, account: string, value: string): Promise<void>;
    delete(service: string, account: string): Promise<boolean>;
}