import { TxHashPreimage, ByteString } from "../types/index.js";
import { SmartContractLib } from "../smartContractLib.js";
/**
 * Utility class for working with transaction hash preimages in Bitcoin smart contracts.
 * Provides methods to:
 * - Calculate transaction hash from preimage data
 * - Extract individual input/output byte strings from preimage
 */
export declare class TxHashPreimageUtils extends SmartContractLib {
    /**
     * Computes the transaction hash from a given transaction hash preimage.
     * Validates the preimage structure and constructs the hash by concatenating
     * version, input/output counts, input/output lists, and lock time.
     *
     * @param txHashPreimage - The transaction hash preimage containing version,
     *                        input/output lists, and lock time.
     * @returns The computed transaction hash as a ByteString.
     */
    static getTxHashFromTxHashPreimage(txHashPreimage: TxHashPreimage): ByteString;
    /**
     * Extracts the byte string of a specific input from the transaction hash preimage.
     * @param txHashPreimage The transaction hash preimage containing input data.
     * @param inputIndex The index of the input to extract.
     * @returns The byte string representing the specified input.
     */
    static getInputByteString(txHashPreimage: TxHashPreimage, inputIndex: bigint): ByteString;
    /**
     * Extracts the byte string of a specific output from the transaction hash preimage.
     * @param txHashPreimage The transaction hash preimage containing output list.
     * @param outputIndex The index of the output to extract.
     * @returns The byte string of the specified output.
     */
    static getOutputByteString(txHashPreimage: TxHashPreimage, outputIndex: bigint): ByteString;
}
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