Heyue_test/frontend/scripts/check-interest-rates.js

import { createPublicClient, http, getAddress } from 'viem'
import { arbitrumSepolia } from 'viem/chains'

const client = createPublicClient({
  chain: arbitrumSepolia,
  transport: http('https://api.zan.top/node/v1/arb/sepolia/baf84c429d284bb5b676cb8c9ca21c07')
})

const LENDING_PROXY = getAddress('0xCb4E7B1069F6C26A1c27523ce4c8dfD884552d1D')

const LENDING_ABI = [
  {
    inputs: [],
    name: 'getBorrowRate',
    outputs: [{ internalType: 'uint64', name: '', type: 'uint64' }],
    stateMutability: 'view',
    type: 'function'
  },
  {
    inputs: [],
    name: 'getSupplyRate',
    outputs: [{ internalType: 'uint64', name: '', type: 'uint64' }],
    stateMutability: 'view',
    type: 'function'
  },
  {
    inputs: [],
    name: 'getUtilization',
    outputs: [{ internalType: 'uint256', name: '', type: 'uint256' }],
    stateMutability: 'view',
    type: 'function'
  }
]

async function main() {
  console.log('\n检查利率和使用率...\n')

  try {
    // 1. 获取借款利率
    const borrowRate = await client.readContract({
      address: LENDING_PROXY,
      abi: LENDING_ABI,
      functionName: 'getBorrowRate'
    })
    console.log('=== getBorrowRate ===')
    console.log('原始值:', borrowRate.toString())
    console.log('类型: uint64')
    console.log()

    // Compound V3 利率通常是每秒利率，精度 1e18
    // APY = (1 + ratePerSecond)^(365*24*60*60) - 1
    // 简化近似：APY ≈ ratePerSecond * secondsPerYear * 100%
    const secondsPerYear = 365 * 24 * 60 * 60

    // 如果是 1e18 精度的每秒利率
    if (borrowRate > 0n) {
      const apyE18 = Number(borrowRate) * secondsPerYear / 1e18
      console.log('假设精度 1e18 (每秒利率):')
      console.log('  每秒利率:', Number(borrowRate) / 1e18)
      console.log('  年化利率 (APY):', apyE18.toFixed(2), '%')
      console.log()

      // 如果是 1e16 精度（百分比形式）
      const apyE16 = Number(borrowRate) * secondsPerYear / 1e16
      console.log('假设精度 1e16:')
      console.log('  年化利率 (APY):', apyE16.toFixed(2), '%')
      console.log()

      // 如果是 1e4 精度（basis points）
      const apyE4 = Number(borrowRate) / 1e4
      console.log('假设精度 1e4 (basis points):')
      console.log('  年化利率 (APY):', apyE4.toFixed(2), '%')
      console.log()
    }

    // 2. 获取存款利率
    const supplyRate = await client.readContract({
      address: LENDING_PROXY,
      abi: LENDING_ABI,
      functionName: 'getSupplyRate'
    })
    console.log('=== getSupplyRate ===')
    console.log('原始值:', supplyRate.toString())
    console.log()

    if (supplyRate > 0n) {
      const apyE18 = Number(supplyRate) * secondsPerYear / 1e18
      console.log('假设精度 1e18 (每秒利率):')
      console.log('  年化利率 (APY):', apyE18.toFixed(2), '%')
      console.log()
    }

    // 3. 获取使用率
    const utilization = await client.readContract({
      address: LENDING_PROXY,
      abi: LENDING_ABI,
      functionName: 'getUtilization'
    })
    console.log('=== getUtilization ===')
    console.log('原始值:', utilization.toString())
    console.log()

    if (utilization > 0n) {
      // Compound V3 使用率通常是 1e18 精度
      const utilizationPercent = Number(utilization) / 1e18 * 100
      console.log('假设精度 1e18:')
      console.log('  使用率:', utilizationPercent.toFixed(2), '%')
      console.log()

      // 如果是 1e4 精度
      const utilizationE4 = Number(utilization) / 1e4
      console.log('假设精度 1e4:')
      console.log('  使用率:', utilizationE4.toFixed(2), '%')
      console.log()
    }

  } catch (error) {
    console.error('查询失败:', error.message)
  }
}

main()