This contract uses the router and factory contract of uniswap v2 (rinkeby network), to help user to add liquidity to the pool,

remove liquidity from the pool , and swap tokens.

function addLiquidity(address tokenA,address tokenB,uint256 amountA,uint256 amountB) external {}

this func adds liquidity to the pool , if the pool is not exits then it will create a new one

Note :-before calling this function user need to approve the tokens to this contract address (amountA,amountB),that user want add.

tokenA = address of first token

tokenB = address of second token

amountA = first token amount

amountB = second token amount

after executing this func user will get some Lp tokens and the pool address in the event emitted after a successful execution.

the LP token will get stored inside the contract , which user can check with by calling the

liquidityOf(ownerAddress,poolAddress)

function removeLiquidity(address tokenA, address tokenB) external {}

By calling this function user can remove liquidity , that provided earlier.

tokenA = address of first token

tokenB = address of second token

Internally this function uses all the LP tokens(for a particular pool) that the user have in this contract.

After successful execution user will get back the tokens.

function swapTokens(address fromToken,address toToken,uint256 tokenAmountForSwap) external {}

By calling this function user is able to swap tokens

fromToken = token address user want to swap

toToken = token Address user want to get after swap

tokenAmountForSwap = token amount user want to swap

Note :- User need to approve the tokenAmountForSwap from fromToken to this contract address .

after successful execution of this function user will get the desired tokens.

All the contract is deployed at Rinkeby network

tokenA is deployed at (0x1E97446647d94d36e987e5b353Ec66Dd53B476aB)

tokenB is deployed at (0xC52329f1e51E09D9a2B5da6426D9f946D6b16079)

ERC 20 token contract is verified. etherscan link

MyLiquidity contract is deployed at 0x505B5ec5E027ceFbE7C32d1556dfCc23a7bE32cd

Add Liquidity :- 0xa795e7040b3803325354aff66fcbda0e79a7ecbfc0b2e7e474df5bb946f71eec

swap Tokens :- 0x934a9ca08cdb4be6109952203907cf29805fe681c28eec587cc5f8409e60c5e1

Remove Liquidity :- 0xa1f395c2198047fff44aac840406d9dfa0843c626f78fa6df8c51dc4d87ae1a8

we have forked the rinkeby network .For details see hardhat.config.js

to run the tests, first enter the all the necessary env details to a .env files (for details see .env.example files)

then from root directory run,

npx hardhat test