54 lines
2.1 KiB
JavaScript
54 lines
2.1 KiB
JavaScript
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// 验证 APY 计算逻辑
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const borrowRatePerSecond = 14999999976144000n
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const secondsPerYear = BigInt(365 * 24 * 60 * 60) // 31536000
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console.log('\n=== APY 计算验证 ===\n')
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console.log('原始数据:')
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console.log(' borrowRatePerSecond:', borrowRatePerSecond.toString())
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console.log(' secondsPerYear:', secondsPerYear.toString())
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console.log()
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// 方法1：错误的计算（之前的方式）
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const wrongAPY = Number(borrowRatePerSecond) / 10000
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console.log('❌ 错误计算（除以10000）:')
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console.log(' APY:', wrongAPY.toFixed(2), '%')
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console.log(' = 1,499,999,997,614.40 %（明显错误）')
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console.log()
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// 方法2：正确的计算
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// APY% = (ratePerSecond / 1e18) × secondsPerYear × 100
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const borrowAPY = (borrowRatePerSecond * secondsPerYear * BigInt(100)) / BigInt(10 ** 18)
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console.log('✅ 正确计算（Compound V3 格式）:')
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console.log(' 每秒利率:', Number(borrowRatePerSecond) / 1e18)
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console.log(' 年化倍数 (1 + rate)^seconds ≈ rate × seconds:')
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console.log(' ', Number(borrowRatePerSecond) / 1e18, '× 31,536,000 =', Number(borrowRatePerSecond) * 31536000 / 1e18)
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console.log(' APY:', Number(borrowAPY).toFixed(2), '%')
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console.log()
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// 详细计算步骤
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console.log('计算步骤:')
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console.log(' 1. borrowRatePerSecond × secondsPerYear × 100')
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console.log(' =', borrowRatePerSecond.toString(), '×', secondsPerYear.toString(), '× 100')
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const step1 = borrowRatePerSecond * secondsPerYear * BigInt(100)
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console.log(' =', step1.toString())
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console.log()
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console.log(' 2. 结果 ÷ 10^18')
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console.log(' =', step1.toString(), '÷ 1000000000000000000')
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console.log(' =', borrowAPY.toString())
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console.log()
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console.log('最终结果: ', Number(borrowAPY).toFixed(2), '%')
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console.log()
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// 验证使用率计算
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console.log('=== 使用率计算验证 ===\n')
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console.log('如果 utilizationRate = 0（当前没有借款）')
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const utilizationRate = 0n
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const utilizationPercent = utilizationRate > 0n
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? (utilizationRate * BigInt(100)) / BigInt(10 ** 18)
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: 0n
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console.log(' 使用率:', Number(utilizationPercent).toFixed(2), '%')
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console.log()
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