DeFi Lending and Borrowing: Building a Lending Protocol Interface

DeFi lending protocols have created a new financial system. Building a lending interface requires real-time supply/borrow rates and health factor monitoring.

Lending Data Model

interface LendingPosition {
  supplied: Array<{ asset: string; amount: number; apy: number }>
  borrowed: Array<{ asset: string; amount: number; apy: number }>
  healthFactor: number
  netApy: number
}

Health Factor Calculation

function calculateHealthFactor(supplies: SupplyPosition[], borrows: BorrowPosition[], pools: LendingPool[]): number {
  const totalCollateral = supplies.reduce((sum, s) => {
    const pool = pools.find(p => p.asset === s.asset)
    return sum + s.valueUsd * (pool?.liquidationThreshold || 0.8)
  }, 0)
  const totalBorrow = borrows.reduce((sum, b) => sum + b.valueUsd, 0)
  return totalBorrow > 0 ? totalCollateral / totalBorrow : Infinity
}

Supply and Borrow Interface

Display health factor with color coding, supply/borrow panels with asset selection, rate optimization suggestions, and liquidation warnings.

The Bottom Line

The DeFi Lending UI from BreafIO provides a complete lending interface. The DeFi Dashboard aggregates positions. The Crypto Portfolio Tracker gives a simplified view. The Web3 Auth Kit handles wallet connection, and the Blockchain Explorer verifies lending transactions.