Flash Loan Arbitrage Bot for Ethereum DeFi Trading

JaredFromSubway's flash loan bot executes zero-capital arbitrage trades across DEXs. Borrow millions, arbitrage price differences, and repay in a single transaction — $0 to start.

What are Flash Loans?

Flash loans are uncollateralized loans unique to DeFi that must be borrowed and repaid within a single blockchain transaction. Aave flash loan bots and other protocols like dYdX and Balancer let you borrow millions of dollars with no collateral, as long as you repay the full amount plus a small fee before the transaction completes. This is why flash loan arbitrage is sometimes called a "free MEV bot" strategy — you need $0 starting capital.

If the loan can't be repaid (because the arbitrage wasn't profitable enough), the entire transaction reverts as if it never happened. You lose nothing except the gas fee for the failed transaction. This makes flash loan arbitrage one of the lowest-risk trading strategies in DeFi.

Flash loans democratize arbitrage trading by removing the capital barrier. Instead of needing $500,000 to execute a meaningful arbitrage trade, you can borrow it, execute the trade, repay the loan, and keep the profit — all in one atomic transaction that takes less than 12 seconds.

$0 starting capital. Seriously.

Flash loans let JaredFromSubway's bot borrow millions, execute the arbitrage, and repay — all in one transaction. If it's not profitable, nothing happens.

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How Flash Loan Arbitrage Works

Step 1: Opportunity Detection

The bot monitors price feeds across all major DEXs (Uniswap, Sushiswap, Curve, Balancer, etc.) to detect price discrepancies for the same token pair. When ETH/USDC trades at different prices on two DEXs, a flash loan arbitrage opportunity exists.

Step 2: Profitability Simulation

Before executing, the bot simulates the entire trade on a local blockchain fork. It calculates the exact profit after accounting for flash loan fees (typically 0.05-0.09%), DEX trading fees, slippage from trade size, and gas costs for the transaction.

Step 3: Flash Loan Execution

The bot's smart contract borrows tokens from Aave or dYdX, swaps on the cheaper DEX, swaps back on the expensive DEX, repays the flash loan plus fee, and keeps the profit — all in one transaction. If any step fails, everything reverts.

Step 4: Profit Collection

After the flash loan is repaid, the remaining tokens (the profit) stay in the bot's smart contract. Profits are automatically tracked and available for withdrawal at any time.

Flash Loan Arbitrage Strategies

Two-Hop Arbitrage

The simplest strategy: borrow Token A via flash loan, swap for Token B on DEX 1 (where it's cheap), swap Token B back to Token A on DEX 2 (where it's expensive), repay the flash loan, keep the difference.

Example: Borrow 100 ETH → Swap to 390,000 USDC on Uniswap → Swap back to 100.5 ETH on Sushiswap → Repay 100.05 ETH loan → Keep 0.45 ETH profit (~$1,755).

Triangular Flash Loan Arbitrage

More complex but less competitive: cycle through three token pairs to find profit paths that simple two-hop bots miss. The bot builds a graph of all possible trading routes and uses algorithms to find profitable cycles.

Example: Borrow USDC → ETH on Uniswap → WBTC on Curve → USDC on Balancer → Repay flash loan → Keep excess USDC as profit.

Multi-Pool Flash Loan Arbitrage

Advanced strategy that routes trades through multiple pools and AMM types (Uniswap V2, V3, Curve stableswap, Balancer weighted pools) to find the most profitable execution path. Different AMM designs have different pricing curves, creating opportunities invisible to simpler bots.

Supported Flash Loan Protocols

Aave V3 Flash Loan Bot Integration

The largest flash loan provider with billions in available liquidity. Our Aave flash loan bot pays just 0.05% per flash loan.

Supports: ETH, USDC, USDT, DAI, WBTC, and 50+ tokens

Uniswap V3

Flash swaps directly from Uniswap pools. Borrow any token in a pool and repay within the same transaction.

Supports: Any token pair with Uniswap V3 liquidity

Balancer

Flash loans from Balancer vault with zero fees. Access to all tokens in Balancer pools.

Supports: Any token in Balancer pools

Flash Loan Bot Features

  • Zero upfront capital required for arbitrage
  • Atomic execution — all or nothing, no partial losses
  • Multi-DEX monitoring (Uniswap V2/V3, Sushi, Curve, Balancer)
  • Advanced path-finding across 100+ liquidity pools
  • Pre-execution profit simulation on local chain fork
  • Flashbots integration for private transaction submission
  • Gas optimization for maximum net profit
  • Cross-protocol flash loan sourcing (Aave, dYdX, Balancer)

Why Flash Loan Arbitrage on Ethereum?

Risk-Free Execution

If the arbitrage isn't profitable after fees and gas, the transaction reverts. You only lose the gas cost of the failed transaction. No capital is ever at risk in an unsuccessful trade.

No Capital Lock-up

Unlike traditional arbitrage that requires holding large positions, flash loan arbitrage borrows and repays within seconds. Your capital remains free for other opportunities.

Market-Neutral

Flash loan arbitrage profits from price differences, not price direction. Whether markets are bullish, bearish, or flat, arbitrage opportunities exist whenever people trade on DEXs.

Fully Transparent

Every trade is on-chain and verifiable on Etherscan. You can audit every flash loan, every swap, every profit in complete transparency.

Start Flash Loan Arbitrage with JaredFromSubway

$0 capital needed. JaredFromSubway's bot handles flash loan borrowing, arbitrage execution, and repayment automatically.

Get Started — From $10,000/yr