import * as bitcoin from "bitcoinjs-lib";
import type { Utxo } from "../types";
/** Sum input values in satoshis. */
export declare function sumInputs(utxos: Utxo[]): number;
/** Sum output values plus a fixed fee. */
export declare function sumOutputs(outputs: {
    address: string;
    value: number;
}[], fee: number): number;
/** Calculate non-negative change amount. */
export declare function calcChange(totalIn: number, totalOut: number): number;
/**
 * Build a PSBT for P2WPKH-like inputs.
 * @throws PsbtBuildError | InsufficientFundsError
 */
export declare function buildPsbt(params: {
    utxos: Utxo[];
    outputs: {
        address: string;
        value: number;
    }[];
    changeAddress: string;
    fee: number;
    testnet?: boolean;
}): bitcoin.Psbt;
/** Sign PSBT with WIF or raw private key. */
export declare function signPsbt(psbt: bitcoin.Psbt, priv: Buffer | string, testnet?: boolean): bitcoin.Psbt;
/** Finalize all inputs and return hex and txid. */
export declare function finalizePsbt(psbt: bitcoin.Psbt): {
    hex: string;
    txid: string;
};