#!/usr/bin/env node
/**
 * perp-guardrail — OWS Policy Engine custom executable.
 *
 * Protocol:
 *   stdin  → PolicyContext JSON (from OWS engine)
 *   stdout → PolicyResult JSON  {"allow": bool, "reason"?: string}
 *
 * Validates:
 *   1. Contract address whitelist (per chain)
 *   2. Per-transaction USD amount limit
 *   3. Daily cumulative spending limit
 *   4. Withdrawal limits (per-tx and daily)
 *   5. Blocked function selectors (e.g. approve)
 *   6. Allowed trading symbols
 *
 * Configuration is read from PolicyContext.policy_config:
 *   { max_tx_usd, max_daily_usd, max_withdraw_usd, max_daily_withdraw_usd,
 *     allowed_symbols?, block_selectors?, allowed_contracts?, allowed_chains? }
 */
export {};