import { PublicKey, Transaction, TransactionInstruction, Keypair, Connection, Signer } from '@solana/web3.js';
import BN from 'bn.js';
/**
 * Tìm PDA cho Config account
 */
export declare const findConfigAddress: (programId: PublicKey) => Promise<[PublicKey, number]>;
/**
 * Tìm PDA cho Vault authority
 */
export declare const findVaultAuthorityAddress: (mint: PublicKey, programId: PublicKey) => Promise<[PublicKey, number]>;
/**
 * Tìm PDA cho Vault token account
 */
export declare const findVaultTokenAccountAddress: (mint: PublicKey, programId: PublicKey) => Promise<[PublicKey, number]>;
/**
 * Tìm PDA cho WithdrawNonce account
 */
export declare const findWithdrawNonceAddress: (user: PublicKey, nonce: BN, programId: PublicKey) => Promise<[PublicKey, number]>;
/**
 * Tìm PDA cho Deal account
 */
export declare const findDealAddress: (dealId: string, programId: PublicKey) => Promise<[PublicKey, number]>;
/**
 * Tạo Associated Token Account nếu chưa tồn tại
 */
export declare const createAssociatedTokenAccountIfNotExist: (connection: Connection, payer: Keypair, mint: PublicKey, owner: PublicKey) => Promise<PublicKey>;
/**
 * Chuyển đổi số lượng thành BN
 */
export declare const toBN: (amount: number | bigint | string) => BN;
/**
 * Xây dựng và ký transaction
 */
export declare const buildAndSignTransaction: (connection: Connection, payer: PublicKey, instructions: TransactionInstruction[], signers?: Signer[]) => Promise<Transaction>;
/**
 * Ước tính phí giao dịch
 */
export declare const estimateFee: (connection: Connection, instructions: TransactionInstruction[], payer: PublicKey) => Promise<number | null>;