Arbitrage between WBTC and ETH

【Introduction of Arbitrage between WBTC and ETH】

• This is a solidity smart contract that allows a user to get a opportunity to execute automatic arbitrage between WBTC and ETH.

【Diagram of workflow】

【Setup】

① Add .env file

• Based on .env.example , you add .env file

② Install modules

$ npm install

③ Compile & migrate contracts (on Kovan testnet)

$ npm run migrate:kovan

④ Execute script (it's instead of testing)

$ npm run script:arbitrage

【Remarks】

• In advance (and in case of using kovan), you need to add a pair (WBTC - ETH) liquidity into uniswap pool and balancer pool.

【References】

• [Compound]:

  • Deployed contract address (on Mainnet and Ropsten)

    • Doc：https://compound.finance/docs#networks
    • Github（Full）：https://github.com/compound-finance/compound-config/tree/master/networks

  • compound-borrow-examples
    https://github.com/compound-developers/compound-borrow-examples/blob/master/solidity-examples/MyContracts.sol

  • Borrowing an ERC20 Token by using ETH as Collateral
    https://medium.com/compound-finance/borrowing-assets-from-compound-quick-start-guide-f5e69af4b8f4

  • [Workshop]：Lending & Borrowing Tokens on Compound from Solidity
    https://www.youtube.com/watch?v=0H8pC1-ADoY

• [Uniswap]:

  • Flash Swap
    https://uniswap.org/docs/v2/core-concepts/flash-swaps/

  • Flash Swaps for developers
    https://uniswap.org/docs/v2/smart-contract-integration/using-flash-swaps/

  • ExampleFlashSwap.sol
    https://github.com/Uniswap/uniswap-v2-periphery/blob/master/contracts/examples/ExampleFlashSwap.sol

  • FlashSwap example
    https://github.com/Austin-Williams/uniswap-flash-swapper

• [Balancer]:

  • Deployed addresses on Kovan
    https://docs.balancer.finance/smart-contracts/addresses#kovan

  • Doc

    • interface
      https://docs.balancer.finance/smart-contracts/interfaces

    • on-chain registry (add pool pair)
      https://docs.balancer.finance/smart-contracts/on-chain-registry#addpoolpair