import { Address, Hex } from "viem";
export declare function encodeRequestId(id: bigint): string;
export declare function decodeRequestIdString(idString: string): bigint;
export declare function generateRequestId(): bigint;
/**
 * Handle rich request metadata parsing.
 * In the future, we may consider a much stronger form of hashing here,
 * potentially EIP-712 compliant ones.
 */
export type DaimoRichRequestV2 = {
    /** Version number of rich request metadata format */
    v: number;
    /** Proposed fulfiller - user to whom request is sent */
    fulfiller: Address | null;
};
export declare function createRequestMetadata(reqMeta?: DaimoRichRequestV2): Hex;
export declare function parseRequestMetadata(metadata: Hex): DaimoRichRequestV2;