import { PlatformID } from '@digitaldefiance/ecies-lib';
import { DifficultyTier } from '../../enumerations/difficultyTier';
/**
 * Describes the type of Merkle tree computation a work unit requires.
 */
export declare enum WorkUnitOperation {
    /** Hash raw leaf data to produce a leaf node checksum */
    LeafHash = "leaf_hash",
    /** Concatenate child hashes and hash the result to produce an interior node */
    InteriorHash = "interior_hash"
}
/**
 * A single unit of useful work issued to a rate-limited client.
 *
 * Follows the IBaseData<TID> workspace convention:
 * - Frontend uses IWorkUnit<string>
 * - Backend uses IWorkUnit<Uint8Array>
 *
 * @template TID - Platform ID type. Defaults to string for JSON/frontend.
 */
export interface IWorkUnit<TID extends PlatformID = string> {
    /** Unique identifier for this work unit (UUID v4) */
    id: string;
    /** The Merkle tree this work unit contributes to */
    treeId: string;
    /** Position index within the tree (level + offset) */
    treeLevel: number;
    treeIndex: number;
    /** The operation to perform */
    operation: WorkUnitOperation;
    /**
     * Input data — base64-encoded for JSON transport.
     * For LeafHash: the raw block data to hash.
     * For InteriorHash: concatenated child hashes (each 64 bytes).
     */
    inputData: string;
    /** Number of child hashes (for InteriorHash; 0 for LeafHash) */
    childCount: number;
    /** Difficulty tier governing this work unit */
    difficulty: DifficultyTier;
    /** Challenge token binding this work unit to a client */
    challengeToken: string;
    /** ISO 8601 timestamp when this work unit was created */
    createdAt: string;
    /** ISO 8601 timestamp when this work unit expires */
    expiresAt: string;
}
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