import type { EVMTypedData } from "../types/EVMTypedData";
/**
 * Canonicalize a typed-data payload for the remote signing service:
 *   - add `EIP712Domain` to `types` if absent,
 *   - only include `EIP712Domain` fields actually present in `domain`
 *     (matches `eth_signTypedData_v4` semantics).
 */
export declare function normalizeEvmTypedData(data: EVMTypedData): EVMTypedData;
/**
 * `JSON.stringify` replacement that serializes BigInt values as hex strings.
 * Vanilla `JSON.stringify` throws on BigInt; the remote signing service
 * expects hex.
 */
export declare function serializeJsonWithBigInt(value: unknown): string;