market-data-collector

The provided README presents a project called FlashLoanArbitrage. Although the repository is named market-data-collector and described as collecting or processing market data for analysis, the README itself focuses on a DeFi arbitrage bot that uses flash loans. According to the README, it combines a smart contract with a local Node.js script named goflash.js. The script is said to run on the user's computer, scan prices, and trigger arbitrage through the contract. Workflow described: The contract takes a flash loan in USDC, converts the user's ETH to USDC before the trade, buys ETH at a lower price on one platform, sells ETH at a higher price on another, repays the loan plus fees and gas, converts remaining profit from USDC back to ETH, and leaves the remaining amount as profit. The script checks ETH/USDC prices on five platforms: Chainlink as an oracle base price, Uniswap V2, SushiSwap, Curve Finance, and Balancer. It waits for a price difference of 0.9% or more before triggering the contract. It is described as scanning every 60 seconds and displaying real-time prices with up, down, or unchanged indicators and the maximum spread. Flash loan venues: The README lists four protocols for flash loans: Aave at 0.05% with up to 10,000,000 USDC; dYdX at 0.05% with up to 500,000 USDC; Uniswap V3 at 0.01% with up to 5,000,000 USDC; and Balancer at 0.02% with up to 1,000,000 USDC. It notes that larger loans incur higher fees. Setup and interface: The README says to download goflash.js and package.json, run npm install, then run node goflash.js. On first launch, it prompts to create a new wallet or import an existing wallet with a private key. The private key is saved to wallet.json in the same folder. The menu includes DeFi protocol selection, loan amount in ETH, recreate wallet, import wallet, start arbitrage, and exit. It recommends dYdX or Uniswap V3 for lower fees, accepts loan amounts from 10 ETH up to the protocol maximum, and warns that a wallet balance below 0.1 ETH may not cover gas for loans over 10 ETH. Dependencies: ethers ^6.11.1, inquirer ^8.2.6, and chalk ^4.1.2. Troubleshooting and notes: The README lists errors such as Cannot determine intended module format, Invalid private key format, Insufficient funds, wallet balance zero, RPC may be unavailable, and Pair for ETH/USDC not found on V2. It states the script requires a 0.9% difference to avoid losses, that such differences are rare in real markets, and that it may occasionally show a simulated opportunity for demonstration. Security notes advise never committing wallet.json, adding it to .gitignore, keeping offline private key backups, using a dedicated wallet, starting with small amounts, and never sharing the private key. Scope and risk: The README says the project is shared as-is for educational purposes, use at your own risk. It does not include contract source code, audit details, or performance evidence in the provided text. It involves real wallet private keys and DeFi trading, so the overview should be treated as a description of the README's claims rather than an endorsement.