PureFi ETH BSC Swap Contracts (forked)

Ethereum Mainnet

1. BSC => ETHSwapAgentImpl: 0x0c7aC08bD7a2F747Af7F9f939954b3798c17C230
2. Polygon => ETHSwapAgentImpl: 0x21eb8c8695A37aC50f323df3df3b33Df542519A9

Binance Smart Chain

1. BSCSwapAgentImpl: 0xC4617166e3af9c90055eDF469a9F08215CF80b1D

Polygon

1. BSCSwapAgentImpl: 0x21eb8c8695a37ac50f323df3df3b33df542519a9

Code changes

1. Added bot protection to BEP20 token
2. Introduced a separate Operator role for Swap contracts so that the Owner is only responsible for key admin settings.
3. Updated compiler version to 0.6.12

Security Report

here

Overview

ETH BSC Swap Contracts are responsible for registering swap pairs and swapping assets between ETH and BSC.

Register swap pair

1. Users register swap pair for erc20 token on ETH via ETHSwapAgent(createSwapPair) if the token is not registered.

2. Swap service will monitor the SwapPairRegister event and create swap pair on BSC:

   1. create a BEP20 token on BSC
   2. record the relation between erc20 token and bep20 token.

Swap from ETH to BSC

Once the swap pair is registered, users can swap tokens from ETH to BSC.

1. Users call swapBSC2ETH via ETHSwapAgent and specify erc20 token address, amount, and swap fee.
2. Swap service will monitor the SwapStarted event and call fillETH2BSCSwap via BSCSwapAgent to mint corresponding bep20 tokens to the same address that initiates the swap.

Swap from BSC to ETH

Once the swap pair is registered, users can swap tokens from BSC to ETH.

1. Users call swapBSC2ETH via BSCSwapAgent and specify the bep20 token address, amount, and swap fee. Bep20 tokens will be burned.
2. Swap service will monitor the SwapStarted event and call fillBSC2ETHSwap via BSCSwapAgent to transfer corresponding erc20 tokens to the same address that initiates the swap.

Generate contracts from templates

npm run generate

Test

Generate test contracts from templates:

npm run generate-test

Run tests:

npm run truffle:test

Run coverage:

npm run coverage