import type { Hex } from "viem";
/**
 * Recursively extracts, if it exists, the revert data hex string from an error.
 *
 * When a contract call reverts, Viem throws an `Error` whose `data` property
 * contains the hex-encoded revert reason. That `data` may live on the top-level
 * error or deeper in a chain of `cause` errors. This function walks down the
 * `cause` chain until it finds a valid `0x` hex string.
 *
 * @param error - The thrown Viem `Error` object, which may include a `data` field
 *                or nested `cause` errors carrying the revert data.
 * @returns The `0x` hex string representing the revert data.
 *
 * @throws If no valid `0x` prefixed hex string revert data is found anywhere in the error chain.
 */
export declare function extractRevertError(error: unknown): {
    name: string;
    message: string;
    data: Hex;
};
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