/**
 * postgres-mcp - PostgreSQL Transaction Operations
 *
 * Transaction lifecycle management: begin, commit, rollback,
 * savepoints, and cleanup for the PostgresAdapter.
 */
import type { PoolClient } from "pg";
import type { ConnectionPool } from "../../pool/connection-pool.js";
/**
 * Begin a transaction
 */
export declare function beginTransaction(pool: ConnectionPool | null, activeTransactions: Map<string, PoolClient>, isolationLevel?: string, readOnly?: boolean): Promise<string>;
/**
 * Commit a transaction
 */
export declare function commitTransaction(activeTransactions: Map<string, PoolClient>, transactionId: string): Promise<void>;
/**
 * Rollback a transaction
 */
export declare function rollbackTransaction(activeTransactions: Map<string, PoolClient>, transactionId: string): Promise<void>;
/**
 * Create a savepoint
 */
export declare function createSavepoint(activeTransactions: Map<string, PoolClient>, transactionId: string, savepointName: string): Promise<void>;
/**
 * Release a savepoint
 */
export declare function releaseSavepoint(activeTransactions: Map<string, PoolClient>, transactionId: string, savepointName: string): Promise<void>;
/**
 * Rollback to a savepoint
 */
export declare function rollbackToSavepoint(activeTransactions: Map<string, PoolClient>, transactionId: string, savepointName: string): Promise<void>;
/**
 * Rollback and cleanup a specific transaction by ID.
 * Used for cleaning up orphaned transactions after code mode errors.
 *
 * @param transactionId - The transaction ID to cleanup
 * @returns true if transaction was found and cleaned up, false if not found
 */
export declare function cleanupTransaction(activeTransactions: Map<string, PoolClient>, transactionId: string): Promise<boolean>;
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