An arbitrage bot flash loaned $200 million worth of the dai stablecoin from MakerDAO on Wednesday, making a $3.24 profit after transaction fees.
The bot took advantage of MakerDAO's 'DssFlash' contract, which permits users to borrow any amount of DAI without incurring fees, according to crypto data providerA flash loan is a type of loan that is received and paid back within a single block without any upfront collateral. In this instance, the bot borrowed 200 million DAI tokens and supplied them to the Aave DAI market, borrowing $2,300 worth of wrapped ether against it.
That WETH was used to buy Threshold Network on Curve before it was sold on Balancer in a myriad of single-block transactions. The total profit before fees was $33, however, it incurred almost $30 in transaction and protocol fees, leaving a net profit of $3.24.