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DyDx flashloan tutorial

Example repo on how to take a flash loan with DyDx from ( https://etherscan.io/address/0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e )

Install

  1. npm i

Deploy

To play in remix

  1. npm run flat
  2. Copy content from the FlashloanTaker.flat.sol file to the Remix.
  3. Remove the second pragma experimental ABIEncoderV2;
  4. Deploy contact with tiny amount of token at the time of deployment

using truffle migrations

  1. cp .env.example .env
  2. Specify PRIVATE_KEY and GAS_PRICE in the .env file
  3. npx truffle migrate --network mainnet --reset
  4. Send a tiny amount of the token you want to borrow to the smart contract. E.g. if you borrow WETH the FlashloanTaker has to have 1 wei (one wrapped wei) on the balance.

Other flashloan providers

  1. aave

Use cases

  1. Refinancing. Refinance your interest to a lower interest in another lending protocol. Taking flash loan from Aave in Dai, closing a CDP by sending the Dai to the CDP, taking the ETH which was as a collateral to Compound (whichever has better interest rate for borrowers)
  2. Closing CDP. The same as above but just closing the CDP without any DAI.
  3. Arbitrage.