1inch Aggregator Protocol V4 Swap

The smart contract SwapProxy can be used to trade over 1Inch, using their latest Aggregator Protocol V4.

Testing Environment

The contract was tested on a mainnet fork using Alchemy API key on HardHat Runtime Environment.

Test Run Results

The test had hardcoded addresses which can be changed.

Installations

git clone https://github.com/yash25198/AggregatorV4
cd AggregatorV4
npm init -y
npm install --save-dev hardhat
npm install web3

Running Swap

• For swapping default tokens

  • Use the following command to start the local mainnet fork.

    npx hardhat node --fork https://eth-mainnet.alchemyapi.io/v2/FGRXFwpdQxk6MNS2gGt1J7CputsW0EYo
    

  • Open a new terminal window for executing the next commands cause we dont want to mess up the terminal window that's keeping our local Ethereum network alive.

  • Run the following command to run daiBalance.js to initilize DAI balane in default accouts provided by HardHat( every account have 0 DAI initially ).

    npx hardhat run test/daiBalance.js --network localhost
    

  • Run the next command to swap DAI Tokens in the account to 1Inch Tokens via 1Inch's Aggregator Protocol.

    npx hardhat run test/sample-test.js --network localhost
    

  • Terminal will now contian the data from a GET query to 1Inch API and the best price and allowed slippage for the swap.

• For swapping custom tokens

  • Change addresses of ERC20 Tokens in sample-test.js under test folder.

  • Change Token address of required token in daiBalance.js under test folder.

  • Change addresses of Tokens in SwapProxy.sol in contracts folders.

  • Follow the same steps mentioned for default run to get swap results.

Notes

• The test would not work on any test network cause 1Inch has no test network contract or hosting.

• After swap check out the terminal where mainnet fork is running to see all the transactions made by the smart contract.

• All the transaction details and account balance are lost when the mainnet fork is terminated.