journey.md

Contracts

Links

• https://kovan-optimistic.etherscan.io/address/0x5ee99870b0bfaaa76ff583659e66afe10c783383
  • Address of the "owner"

Foundry

• https://book.getfoundry.sh/cheatcodes/deal.html?highlight=deal(#deal

Uniswap

• SwapRouter

  • https://kovan-optimistic.etherscan.io/address/0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45#code

• Docs / Info

  • https://docs.uniswap.org/protocol/reference/deployments
  • https://docs.uniswap.org/protocol/reference/periphery/SwapRouter
    • SwapRouter02
  • https://soliditydeveloper.com/uniswap2
  • https://blockchain.oodles.io/dev-blog/utilizing-the-new-uniswap-v2-in-your-smart-contract/

Uniswap tx

• https://kovan-optimistic.etherscan.io/tx/0xd7ecf64e0e202fb8708762f5a3e8009d6a58c4308c4a52725e5d210060e5068e
• https://kovan-optimistic.etherscan.io/tx/0x13cf89038ca35c9f05b728f6cee58f231afe6237973fbb63107c3b9729977c0d

Problems with uniswap

• https://github.com/Uniswap/solidity-lib/blob/master/contracts/libraries/TransferHelper.sol
  • Somethings fails inside here
  • I have enough liquidity, so not sure what the problem is.
• Got it working when calling it directly to the contract
  • https://kovan-optimistic.etherscan.io/tx/0x9402b8e46cf04da64f77145caea07f8aa15f53da5e06586d648feaa0a2b05c55
  • Tried to deposit ETH into a smart contract and then call it througth it, but it did not work
• Got it working (finally)
  • I think the problem was that the wrong interface was used for the router
    • https://kovan-optimistic.etherscan.io/tx/0x87ee2fc4335d9000818cdb6bd03a98ede6981672cc510559f968bcc4aee2c99b

Rip - the price oracle for uniswap is actually not onchain

• could do something like https://stackoverflow.com/a/71815432
  • Requires user to interact :(
• Never mind should be able to use reserve0/reserve1, but it is on pool level. I think this is ok, but we need to use liquid pool as the oracle.
  • https://github.com/Uniswap/v2-core/blob/master/contracts/UniswapV2Pair.sol
• I knew I had miscalled something, it's even in the uniswap v3 whitepaper.
  • https://docs.uniswap.org/protocol/concepts/V3-overview/oracle