// 验证 APY 计算逻辑

const borrowRatePerSecond = 14999999976144000n
const secondsPerYear = BigInt(365 * 24 * 60 * 60) // 31536000

console.log('\n=== APY 计算验证 ===\n')

console.log('原始数据:')
console.log('  borrowRatePerSecond:', borrowRatePerSecond.toString())
console.log('  secondsPerYear:', secondsPerYear.toString())
console.log()

// 方法1：错误的计算（之前的方式）
const wrongAPY = Number(borrowRatePerSecond) / 10000
console.log('❌ 错误计算（除以10000）:')
console.log('  APY:', wrongAPY.toFixed(2), '%')
console.log('  = 1,499,999,997,614.40 %（明显错误）')
console.log()

// 方法2：正确的计算
// APY% = (ratePerSecond / 1e18) × secondsPerYear × 100
const borrowAPY = (borrowRatePerSecond * secondsPerYear * BigInt(100)) / BigInt(10 ** 18)
console.log('✅ 正确计算（Compound V3 格式）:')
console.log('  每秒利率:', Number(borrowRatePerSecond) / 1e18)
console.log('  年化倍数 (1 + rate)^seconds ≈ rate × seconds:')
console.log('    ', Number(borrowRatePerSecond) / 1e18, '× 31,536,000 =', Number(borrowRatePerSecond) * 31536000 / 1e18)
console.log('  APY:', Number(borrowAPY).toFixed(2), '%')
console.log()

// 详细计算步骤
console.log('计算步骤:')
console.log('  1. borrowRatePerSecond × secondsPerYear × 100')
console.log('     =', borrowRatePerSecond.toString(), '×', secondsPerYear.toString(), '× 100')
const step1 = borrowRatePerSecond * secondsPerYear * BigInt(100)
console.log('     =', step1.toString())
console.log()
console.log('  2. 结果 ÷ 10^18')
console.log('     =', step1.toString(), '÷ 1000000000000000000')
console.log('     =', borrowAPY.toString())
console.log()

console.log('最终结果: ', Number(borrowAPY).toFixed(2), '%')
console.log()

// 验证使用率计算
console.log('=== 使用率计算验证 ===\n')
console.log('如果 utilizationRate = 0（当前没有借款）')
const utilizationRate = 0n
const utilizationPercent = utilizationRate > 0n
  ? (utilizationRate * BigInt(100)) / BigInt(10 ** 18)
  : 0n
console.log('  使用率:', Number(utilizationPercent).toFixed(2), '%')
console.log()