/**
 * Aerodrome APY Engine — computes yield on-chain from gauge + pool data
 *
 * APY = (gauge.rewardRate × AERO_price × 365 × 86400) / poolTVL + feeAPY
 *
 * Uses the existing Aerodrome router to price AERO in USDC.
 * Caches results for 5 minutes (LP APY moves slowly).
 */
import { ethers } from 'ethers';
import { formatAPY, formatTVL } from '../lend/morpho-api';
export { formatAPY, formatTVL };
export interface PoolMetrics {
    /** Total APY as decimal (0.076 = 7.6%) — emissions + estimated fees */
    apy: number;
    /** Emission APY as decimal */
    apyEmissions: number;
    /** Fee APY as decimal (estimated from recent data) */
    apyFees: number;
    /** TVL in USD */
    tvlUsd: number;
    /** AERO price in USD */
    aeroPrice: number;
}
/** Clear cache (for testing) */
export declare function clearPoolMetricsCache(): void;
export declare function getFallbackAPY(poolKey: string): {
    range: string;
    midpoint: number;
};
/**
 * Fetch metrics for all registered pools using on-chain data.
 * Returns null on failure (callers should use fallback).
 */
export declare function fetchAllPoolMetrics(provider: ethers.Provider): Promise<Record<string, PoolMetrics> | null>;
/**
 * Fetch metrics for a single pool by key.
 */
export declare function fetchPoolMetrics(key: string, provider: ethers.Provider): Promise<PoolMetrics | null>;