import { DatabaseConfig } from '@n8n/config';
import { DataSource } from '@n8n/typeorm';
import type { EntityManager } from '@n8n/typeorm';
import type { OperationContext } from './transaction';
export declare const enum DbLock {
    AUTH_ROLES_SYNC = 1001,
    TRUSTED_KEY_REFRESH = 1002,
    WORKFLOW_STATISTICS_ROLLUP = 1003,
    WORKFLOW_REVIEW_MUTATION = 1004,
    MIGRATIONS = 1005,
    EVAL_COLLECTION_RERUN = 1006,
    INSTANCE_AI_SETTINGS = 1007,
    DATA_ENCRYPTION_KEY_SEED = 1008,
    INSIGHTS_COMPACTION = 1009,
    TEST = 9999
}
type WithLockOptions = {
    subKey?: number;
} & ({
    timeoutMs?: number;
    waitIndefinitely?: never;
} | {
    timeoutMs?: never;
    waitIndefinitely?: boolean;
});
export declare class DbLockService {
    private readonly dataSource;
    private readonly databaseConfig;
    private readonly locks;
    constructor(dataSource: DataSource, databaseConfig: DatabaseConfig);
    withLock<T>(lockId: DbLock, fn: (tx: EntityManager, ctx: OperationContext) => Promise<T>, options?: WithLockOptions): Promise<T>;
    withLockContext<T>(lockId: DbLock, fn: (ctx: OperationContext) => Promise<T>, options?: {
        timeoutMs?: number;
    }): Promise<T>;
    tryWithLock<T>(lockId: DbLock, fn: (tx: EntityManager) => Promise<T>, options?: {
        subKey?: number;
    }): Promise<T>;
    private acquireLock;
    private tryAcquireLock;
    private createReleaseFn;
    private getOrCreateLockState;
}
export {};