import { UTXOSpendable } from './bitcoinHelpers.js';
import { Recipient } from './createTransaction.js';
import '@c4/btc-utils';
import '@scure/btc-signer';

type BitcoinRecipient = Recipient;
type ReselectSpendableUTXOsFn = (satsToSend: bigint, pinnedUTXOs: UTXOSpendable[], lastTimeSelectedUTXOs: UTXOSpendable[]) => Promise<UTXOSpendable[]>;
interface BitcoinTransactionPrepareResult {
    inputs: Array<UTXOSpendable>;
    recipients: Array<BitcoinRecipient>;
    changeAmount: bigint;
    fee: bigint;
    estimatedVSize: number;
}
declare function prepareTransaction(txInfo: {
    recipients: Array<BitcoinRecipient>;
    changeAddressScriptPubKey: Uint8Array;
    opReturnData?: Uint8Array[];
    selectedUTXOs?: Array<UTXOSpendable>;
    feeRate: bigint;
    reselectSpendableUTXOs: ReselectSpendableUTXOsFn;
}): Promise<BitcoinTransactionPrepareResult>;
declare function calculateFee(info: {
    recipientAddressScriptPubKeys: Uint8Array[];
    opReturnData: Uint8Array[];
    selectedUTXOs: Array<UTXOSpendable>;
    feeRate: bigint;
    extraSize?: number;
}): Promise<{
    fee: bigint;
    estimatedVSize: number;
}>;

export { type BitcoinRecipient, type BitcoinTransactionPrepareResult, type ReselectSpendableUTXOsFn, calculateFee, prepareTransaction };