/**
 * TETSUO Wallet SDK - Transaction Building & Signing
 */
import { TransactionInput, TransactionOutput, UTXO } from './types';
/**
 * Build an unsigned transaction
 */
export declare function buildTransaction(fromAddress: string, toAddress: string, amount: number, utxos: UTXO[], changeAddress: string): {
    inputs: TransactionInput[];
    outputs: TransactionOutput[];
    fee: number;
};
/**
 * Create transaction hex from inputs and outputs
 */
export declare function createTransactionHex(inputs: TransactionInput[], outputs: TransactionOutput[], scriptPubKeys?: string[]): string;
/**
 * Sign a transaction with proper TETSUO key derivation
 */
export declare function signTransaction(transactionHex: string, privateKey: string, inputs: TransactionInput[], utxos?: any[]): string;
/**
 * Calculate transaction size
 */
export declare function estimateTransactionSize(inputCount: number, outputCount: number): number;
/**
 * Estimate transaction fee
 */
export declare function estimateFee(inputCount: number, outputCount: number): number;