/**
 * Task #385 (HB#236) — on-chain fallback probe for the pop task subgraph-lag
 * zombie-state bug. Symmetric companion to Task #378's vote/list probe helper.
 *
 * Context: `pop task view` and `pop task list` both read from the POP
 * subgraph, which periodically falls behind the chain by 30+ task IDs
 * (HB#223 brain lesson: task-list-stuck-at-367 was a 60+ HB unrecognized
 * symptom of this class of bug). When the subgraph misses a TaskCreated
 * event, any subsequent call that looks up the task by ID returns
 * "not found", even though the task exists on-chain.
 *
 * This module provides `probeTaskOnChain(taskManagerAddr, taskId, provider)`
 * which scans recent TaskCreated / TaskClaimed / TaskAssigned / TaskSubmitted /
 * TaskCompleted / TaskCancelled / TaskRejected events emitted by the
 * TaskManager contract, reconstructs the latest lifecycle state from the
 * event stream, and returns a minimal task shape that callers can display
 * when the subgraph is stale.
 *
 * Cost guard: callers should only invoke this when the subgraph returned
 * "not found" — normal lookups pay zero RPC cost. On cache miss the probe
 * does a single getLogs call with a ~10_000-block lookback (roughly 12
 * hours on Gnosis at 5s blocks), which is the minimum needed to cover the
 * worst-observed subgraph lag. If the task was created earlier than that,
 * the probe returns null and the caller should widen the window manually.
 *
 * Scope: this is a minimum-viable probe for the "task not found" case. It
 * does NOT reconstruct applications, per-rejector metadata, or IPFS
 * metadata — those remain subgraph-exclusive. The probe answers "does
 * this task exist and what's its current status" only, which is enough
 * to unblock the agent-verification workflow that hits this bug most.
 */
import { ethers } from 'ethers';
export type ProbedTaskStatus = 'Created' | 'Claimed' | 'Assigned' | 'Submitted' | 'Completed' | 'Cancelled' | 'Rejected';
export interface ProbedTask {
    taskId: string;
    status: ProbedTaskStatus;
    title?: string;
    metadataHash?: string;
    payout?: string;
    bountyToken?: string;
    bountyPayout?: string;
    assignee?: string;
    claimer?: string;
    completer?: string;
    projectId?: string;
    createdBlock: number;
    lastEventBlock: number;
}
/**
 * Probe the TaskManager contract for a task by ID via event log scanning.
 * Returns null if the TaskCreated event is not found within the lookback
 * window (default 10_000 blocks ≈ 12h on Gnosis).
 */
export declare function probeTaskOnChain(taskManagerAddr: string, taskId: string | number, provider: ethers.providers.Provider, opts?: {
    lookbackBlocks?: number;
}): Promise<ProbedTask | null>;