import { DynamoDBDocumentClient } from '@aws-sdk/lib-dynamodb';
import { MigrationTracker, MigrationRecord, SchemaChange, MigrationConfig } from '../types';
/** Default lock TTL in seconds. Configurable via MigrationConfig.lockTtlSeconds. */
export declare const DEFAULT_LOCK_TTL_SECONDS = 300;
export interface MigrationTrackerHandle extends MigrationTracker {
    readonly lockTtlSeconds: number;
    acquireLock(): Promise<boolean>;
    refreshLock(): Promise<void>;
    releaseLock(): Promise<void>;
    initialize(): Promise<void>;
    getAppliedMigrations(): Promise<MigrationRecord[]>;
    getCurrentVersion(): Promise<string | null>;
    markAsApplied(version: string, name: string, schemaDefinition?: Record<string, any>, schemaChanges?: SchemaChange[], checksum?: string): Promise<void>;
    markAsRolledBack(version: string, previousVersion?: string): Promise<void>;
    markAsFailed(version: string, error: string): Promise<void>;
    recordSchemaChange(change: SchemaChange): Promise<void>;
    getMigration(version: string): Promise<MigrationRecord | null>;
    isApplied(version: string): Promise<boolean>;
}
/**
 * Create a DynamoDB-backed migration tracker.
 *
 * The tracker carries one piece of genuinely mutable state: the current
 * lock id, set by `acquireLock()` and cleared by `releaseLock()`. Everything
 * else is derived from the config or read from DynamoDB on demand.
 */
export declare const createMigrationTracker: (client: DynamoDBDocumentClient, config: MigrationConfig) => MigrationTrackerHandle;
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