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.

The test had hardcoded addresses which can be changed.

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

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.

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.