1inch ProxySwap

A minimal example showing how to integrate 1inch with your smart contract

Dependencies

git clone https://github.com/smye/1inch-swap.git
cd 1inch-swap
python3 -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt

Add the OpenZeppelin dependencies via Brownies package manager

brownie pm install OpenZeppelin/openzeppelin-contracts@4.1.0

To add a live network to Brownie

brownie networks add Ethereum polygon host=https://matic-mainnet.chainstacklabs.com  chainid=137 explorer=https://api.polygonscan.com/api

For a development network

brownie networks add Development polygon-fork host=http://127.0.0.1 cmd=ganache-cli fork=https://matic-mainnet.chainstacklabs.com port=8545

Modify brownie-config.yaml
- router: Address of the 1inch router
- tokenIn: Input token address
- tokenOut: Address of token to receive
- amount: Amount of tokenIn being swapped
- slippage: Percentage that amount of tokenOut can deviate from the quote by, before reverting
- chain_id: Chain ID of the current network, used for querying 1inch API
Set the PRIVATE_KEY environment variable (for live networks)
```
export PRIVATE_KEY=0x....
```

To deploy the SwapProxy contract on a mainnet-fork

brownie run deploy_swap.py --network polygon-fork --interactive

To execute a swap on an already deployed SwapProxy contract on a mainnet-fork
```
brownie run swap.py --network polygon-fork --interactive
```

Deploying on mainnet is exactly the same, but replace polygon-fork with polygon
By default the account used in a forked environment is defined in the get_acc() function in swap.py
The slippage protection (minOut) isn't strictly required in the contract as it is provided in the swap_req["tx"]["data"] value returned by the 1inch API, however, it is an additional failsafe