What is a Flash Loan Arbitrage Bot and how does it work in DeFi trading?

Category: General
Aana Ethan
Normal User
31-Jul-2025 01:19 PM
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A flash loan is an uncollateralized loan provided using DeFi protocols such as Aave or DyDx. It enables users to borrow huge amounts of cryptocurrency immediately; but, the full transaction (borrow, use, and refund) must take place within a single blockchain transaction. If the loan is not repaid immediately, the entire transaction fails.

 

How the Flash Loan Arbitrage Bot Work

 

1. Price Scan: The bot continually checks prices across several DEXs (including Uniswap, SushiSwap, and Balancer).

 

2. Identifying opportunities: Flash loan bot recognises when an asset's price falls on one exchange and rises on another.

 

3. Flash Loan Execution: The bot obtains funds (such as ETH) using a flash loan.

 

4. Buy low and sell high:

  • Purchases the underpriced token on DEX A.
  • Sells it for a greater price on DEX B.

 

5.Loan repayment: In a single transaction, the profit is used to pay back the flash loan.

 

6. Profit Capture: If completed successfully, the bot retains the price difference as pure profit.

 

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