init: 初始化 AssetX 项目仓库
包含 webapp（Next.js 用户端）、webapp-back（Go 后端）、 antdesign（管理后台）、landingpage（营销落地页）、 数据库 SQL 和配置文件。
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267
webapp/hooks/useCollateral.ts
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267
webapp/hooks/useCollateral.ts
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import { useAccount, useReadContract, useReadContracts } from 'wagmi'
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import { formatUnits } from 'viem'
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import { abis, getContractAddress } from '@/lib/contracts'
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import { Token } from '@/lib/api/tokens'
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import { useTokenList } from './useTokenList'
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/**
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* Hook to query user's collateral balance for a specific YT token
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*/
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export function useCollateralBalance(token: Token | undefined) {
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const { address, chainId } = useAccount()
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const lendingProxyAddress = chainId ? getContractAddress('lendingProxy', chainId) : undefined
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const { data: collateralBalance, refetch, isLoading } = useReadContract({
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address: lendingProxyAddress,
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abi: abis.lendingProxy,
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functionName: 'getCollateral',
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args: address && token?.contractAddress ? [address, token.contractAddress as `0x${string}`] : undefined,
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query: {
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enabled: !!address && !!token?.contractAddress && !!lendingProxyAddress,
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},
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})
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const decimals = token?.onChainDecimals ?? token?.decimals ?? 18
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const formattedBalance = collateralBalance
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? formatUnits(collateralBalance as bigint, decimals)
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: '0'
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return {
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balance: collateralBalance as bigint | undefined,
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formattedBalance,
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isLoading,
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refetch,
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}
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}
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/**
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* Hook to query user's borrow balance (in USDC)
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*/
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export function useBorrowBalance() {
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const { address, chainId } = useAccount()
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const { bySymbol } = useTokenList()
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const usdcToken = bySymbol['USDC']
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const lendingProxyAddress = chainId ? getContractAddress('lendingProxy', chainId) : undefined
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const { data: borrowBalance, refetch, isLoading } = useReadContract({
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address: lendingProxyAddress,
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abi: abis.lendingProxy,
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functionName: 'borrowBalanceOf',
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args: address ? [address] : undefined,
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query: {
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enabled: !!address && !!chainId && !!lendingProxyAddress,
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},
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})
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const usdcDecimals = usdcToken?.onChainDecimals ?? usdcToken?.decimals ?? 18
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const formattedBalance = borrowBalance
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? formatUnits(borrowBalance as bigint, usdcDecimals)
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: '0.00'
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return {
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balance: borrowBalance as bigint | undefined,
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formattedBalance,
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isLoading,
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refetch,
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}
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}
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/**
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* Hook to query user's balance (positive = supply, negative = borrow)
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*/
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export function useAccountBalance() {
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const { address, chainId } = useAccount()
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const lendingProxyAddress = chainId ? getContractAddress('lendingProxy', chainId) : undefined
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const { data: supplyBalance, refetch: refetchSupply, isLoading: isLoadingSupply } = useReadContract({
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address: lendingProxyAddress,
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abi: abis.lendingProxy,
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functionName: 'supplyBalanceOf',
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args: address ? [address] : undefined,
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query: {
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enabled: !!address && !!chainId && !!lendingProxyAddress,
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},
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})
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const { data: borrowBalance, refetch: refetchBorrow, isLoading: isLoadingBorrow } = useReadContract({
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address: lendingProxyAddress,
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abi: abis.lendingProxy,
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functionName: 'borrowBalanceOf',
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args: address ? [address] : undefined,
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query: {
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enabled: !!address && !!chainId && !!lendingProxyAddress,
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},
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})
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const supplyValue = (supplyBalance as bigint) || 0n
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const borrowValue = (borrowBalance as bigint) || 0n
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const netBalance = supplyValue - borrowValue
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return {
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balance: netBalance,
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isSupply: supplyValue > 0n,
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isBorrow: borrowValue > 0n,
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isLoading: isLoadingSupply || isLoadingBorrow,
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refetch: () => {
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refetchSupply()
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refetchBorrow()
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},
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}
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}
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/**
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* Hook to calculate LTV (Loan-to-Value) ratio
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* LTV = (Borrow Balance / Collateral Value) * 100
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*/
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export function useLTV() {
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const { bySymbol } = useTokenList()
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const ytA = bySymbol['YT-A']
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const ytB = bySymbol['YT-B']
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const ytC = bySymbol['YT-C']
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const { formattedBalance: borrowBalance } = useBorrowBalance()
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const { value: valueA } = useCollateralValue(ytA)
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const { value: valueB } = useCollateralValue(ytB)
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const { value: valueC } = useCollateralValue(ytC)
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const totalCollateralValue = parseFloat(valueA) + parseFloat(valueB) + parseFloat(valueC)
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const borrowValue = parseFloat(borrowBalance)
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const ltv = totalCollateralValue > 0
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? (borrowValue / totalCollateralValue) * 100
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: 0
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return {
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ltv: ltv.toFixed(2),
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ltvRaw: ltv,
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isLoading: false,
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}
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}
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/**
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* Hook to get YT token price from its contract
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*/
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export function useYTPrice(token: Token | undefined) {
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const { data: ytPrice, isLoading } = useReadContract({
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address: token?.contractAddress as `0x${string}` | undefined,
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abi: abis.YTToken,
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functionName: 'ytPrice',
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query: {
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enabled: !!token?.contractAddress,
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},
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})
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// ytPrice 返回 30 位精度的价格（PRICE_PRECISION = 1e30）
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const formattedPrice = ytPrice
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? formatUnits(ytPrice as bigint, 30)
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: '0'
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return {
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price: ytPrice as bigint | undefined,
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formattedPrice,
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isLoading,
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}
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}
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/**
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* Hook to calculate collateral value in USD
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*/
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export function useCollateralValue(token: Token | undefined) {
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const { formattedBalance } = useCollateralBalance(token)
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const { formattedPrice } = useYTPrice(token)
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const value = parseFloat(formattedBalance) * parseFloat(formattedPrice)
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return {
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value: value.toFixed(2),
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valueRaw: value,
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}
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}
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type AssetConfig = {
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asset: `0x${string}`
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decimals: number
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borrowCollateralFactor: bigint
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liquidateCollateralFactor: bigint
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liquidationFactor: bigint
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supplyCap: bigint
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}
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/**
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* Hook to calculate total borrow capacity and available borrowable amount
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*/
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export function useMaxBorrowable() {
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const { chainId } = useAccount()
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const { bySymbol } = useTokenList()
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const ytA = bySymbol['YT-A']
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const ytB = bySymbol['YT-B']
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const ytC = bySymbol['YT-C']
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const lendingProxyAddress = chainId ? getContractAddress('lendingProxy', chainId) : undefined
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// Collateral balances
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const { formattedBalance: balA, refetch: refetchA } = useCollateralBalance(ytA)
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const { formattedBalance: balB, refetch: refetchB } = useCollateralBalance(ytB)
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const { formattedBalance: balC, refetch: refetchC } = useCollateralBalance(ytC)
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// YT token prices (ytPrice(), 30-decimal precision)
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const { formattedPrice: priceA } = useYTPrice(ytA)
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const { formattedPrice: priceB } = useYTPrice(ytB)
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const { formattedPrice: priceC } = useYTPrice(ytC)
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// Borrow collateral factors from lendingProxy.assetConfigs
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const ytAddresses = [ytA, ytB, ytC]
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.filter(t => !!t?.contractAddress)
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.map(t => t!.contractAddress as `0x${string}`)
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const configContracts = ytAddresses.map((addr) => ({
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address: lendingProxyAddress,
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abi: abis.lendingProxy,
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functionName: 'assetConfigs' as const,
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args: [addr],
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}))
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const { data: configData } = useReadContracts({
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contracts: configContracts as any,
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query: { enabled: !!lendingProxyAddress && configContracts.length > 0 },
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})
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type ConfigTuple = readonly [string, number, bigint, bigint, bigint, bigint]
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const getConfig = (i: number): ConfigTuple | undefined =>
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configData?.[i]?.result as ConfigTuple | undefined
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const calcCapacity = (bal: string, price: string, config: ConfigTuple | undefined) => {
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if (!config || !config[2]) return 0
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const factor = Number(config[2]) / 1e18
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return parseFloat(bal) * parseFloat(price) * factor
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}
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const capacityA = calcCapacity(balA, priceA, getConfig(0))
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const capacityB = calcCapacity(balB, priceB, getConfig(1))
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const capacityC = calcCapacity(balC, priceC, getConfig(2))
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const totalCapacity = capacityA + capacityB + capacityC
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const { formattedBalance: borrowedBalance, refetch: refetchBorrow } = useBorrowBalance()
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const currentBorrow = parseFloat(borrowedBalance) || 0
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const available = Math.max(0, totalCapacity - currentBorrow)
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const refetch = () => {
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refetchA()
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refetchB()
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refetchC()
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refetchBorrow()
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}
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return {
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totalCapacity,
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available,
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formattedCapacity: totalCapacity.toFixed(2),
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formattedAvailable: available.toFixed(2),
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refetch,
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}
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}
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