import type { Coin, VirtualCoin } from "../wallet";
/**
 * Select coins to reach a target amount, prioritizing those closer to expiry
 * @param coins List of coins to select from
 * @param targetAmount Target amount to reach in satoshis
 * @returns Selected coins and change amount, or null if insufficient funds
 */
export declare function selectCoins(coins: Coin[], targetAmount: number): {
    inputs: Coin[] | null;
    changeAmount: number;
};
/**
 * Select virtual coins to reach a target amount, prioritizing those closer to expiry
 * @param coins List of virtual coins to select from
 * @param targetAmount Target amount to reach in satoshis
 * @returns Selected coins and change amount, or null if insufficient funds
 */
export declare function selectVirtualCoins(coins: VirtualCoin[], targetAmount: number): {
    inputs: VirtualCoin[] | null;
    changeAmount: number;
};