import { Buffer } from 'buffer';
import { UTXO } from '../utxo/selectUtxos';
/**
 * Transaction Funding Utility for Peg-in Transactions
 *
 * This module funds an unfunded transaction template from the SDK by adding
 * UTXO inputs and change outputs, creating a transaction ready for wallet signing.
 *
 * Transaction Flow:
 * 1. SDK buildPrePeginPsbt() → unfunded Pre-PegIn tx (0 inputs, HTLC + CPFP outputs)
 * 2. selectUtxosForPegin() → select UTXOs and calculate fees
 * 3. fundPeginTransaction() → add inputs/change, create funded transaction
 *
 * Technical Note:
 * We manually extract the vault output from SDK hex instead of using bitcoinjs-lib
 * parsing because bitcoinjs-lib cannot parse 0-input transactions (even witness format).
 */
import * as bitcoin from "bitcoinjs-lib";
export interface FundPeginTransactionParams {
    /** Unfunded transaction hex from SDK (0 inputs, vault + depositor claim outputs) */
    unfundedTxHex: string;
    /** Selected UTXOs to use as inputs */
    selectedUTXOs: UTXO[];
    /** Change address (from wallet) */
    changeAddress: string;
    /** Change amount in satoshis */
    changeAmount: bigint;
    /** Bitcoin network */
    network: bitcoin.Network;
}
/** A single parsed output from the unfunded WASM transaction */
export interface ParsedOutput {
    value: number;
    script: Buffer;
}
/** Parsed data from an unfunded WASM transaction */
interface ParsedUnfundedTx {
    version: number;
    locktime: number;
    outputs: ParsedOutput[];
}
/**
 * Parses an unfunded transaction hex from WASM.
 *
 * WASM produces witness-format transactions with 0 inputs, which bitcoinjs-lib cannot parse.
 * This function manually extracts the transaction components.
 *
 * Format: [version:4bytes][marker:0x00][flag:0x01][inputs:1byte=0x00][outputCount:1byte]
 *         [output1: value:8bytes + scriptLen:1byte + script:N bytes]
 *         [output2: ...]
 *         [locktime:4bytes]
 *
 * @param unfundedTxHex - Raw transaction hex from WASM
 * @returns Parsed transaction components
 * @throws Error if transaction structure is invalid
 */
export declare function parseUnfundedWasmTransaction(unfundedTxHex: string): ParsedUnfundedTx;
/**
 * Funds an unfunded peg-in transaction by adding inputs and change output.
 *
 * Takes an unfunded transaction template (0 inputs, 1 vault output) from the SDK
 * and adds UTXO inputs and a change output to create a funded transaction ready
 * for wallet signing.
 *
 * @param params - Transaction funding parameters
 * @returns Transaction hex string ready for wallet signing
 */
export declare function fundPeginTransaction(params: FundPeginTransactionParams): string;
export { getNetwork } from '../../primitives/utils/bitcoin';
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