/**
 * Convert a hexadecimal value to its UTF-8 string representation.
 * If the input value is not a valid hexadecimal string, it will return the original value.
 *
 * @param {any} value - The hexadecimal value to convert.
 * @returns {string} The converted UTF-8 string or the original value if it is not a valid hex string.
 */
export declare function convertHexToUtf8(value: string): string;
/**
 * Get a transaction object to sign by removing 'gas' and 'from' fields from the input transaction parameters.
 *
 * @param {any} txParams - The original transaction parameters.
 * @returns {any} The transaction object with 'gas' and 'from' fields removed.
 */
export declare const getTransactionToSign: <T>(txParams: T & {
    gas?: string;
    from?: string;
}) => T;
export declare function isSignedTransaction(tx: any): boolean;