Developer

Boomswap is a Uniswap V2 fork. Developers can interact with Boomswap in the same way they use Uniswap repositories and SDKs.

Boomswap has a total fee structure of 1.9% from which 0.3% goes to the protocol.

The following steps were made when forking the original code:

V2-Core-Master Module

Contracts and Modifications

• BoomswapERC20.sol : Originally UniswapV2ERC20, this contract has been modified for LP name and symbol adjustments.

• BoomswapPair.sol : Originally UniswapV2Pair. Fee value in updated in the BoomswapPair-swap() function at these two lines:

// 19 = 1.9% fee
uint256 balance0Adjusted = balance0.mul(1000).sub(amount0In.mul(19));
uint256 balance1Adjusted = balance1.mul(1000).sub(amount1In.mul(19));

• BoomswapFactory.sol: Formerly UniswapV2Factory. Key modification includes the initialization of the state variable INIT_CODE_HASH. The deployment of this contract requires a specified _feeToSetter address, which has the authority to adjust the feeTo parameter.

V2-Periphery-Master Module

Implementation Steps

1. Retrieve the contract address and INIT_CODE_HASH from the deployed Factory.

2. In UniswapV2Library.sol, replace the existing init code hash in the pairFor function (Remove the '0x' prefix).

3. Compile and deploy the IUniswapV2Router02 and BoomswapRouter.sol contracts (previously UniswapV2Router02) using the appropriate pragma solidity version.

4. BoomswapRouter Deployment: Requires the _FACTORY address and the WBMC address (formerly WETH).

Consider modifying UniswapV2Library.sol and UniswapV2LiquidityMathLibrary.sol fees initially at 0.3% (997/1000).

Don't subsitute WETH with WBMC. Maintain the convention usage of ETH everywhere in the code: in names like IWETH, amountETHMin, etc.

API Endpoints Documentation

Don't forget to approve token before calling any of the following endpoints.

🔗 Pair Interaction

• Create Pair

• Get Pair

🔗 Providing Liquidity

• Use addLiquidity for ERC-20/ERC-20 pairs.

• For WBMC pairs (WETH convention), use addLiquidityETH.

• To remove liquidity, use removeLiquidity or removeLiquidityETH.

• For withdrawal estimates, follow the logic in UniswapV2Pair-burn().

🔗 Swap Operations

• swapExactTokensForTokens

• swapTokensForExactTokens

• swapExactETHForTokens

• swapTokensForExactETH

• swapExactTokensForETH

• swapETHForExactTokens

🔗 Pricing

• Quotation: Use quote.

• Exact Output: Use getAmountOut | getAmountsOut.

• Exact Input: Use getAmountIn | getAmountsIn.

• Pair Reserves (TVL): Use getReserves.

Resources

• Uniswap V2 Router Contracts Documentation

• Uniswap V2 Factory Contracts Documentation

• Uniswap V2 Libraries Documentation

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Contracts