I'm using my owned cloned UniswapV2 smart contracts(core+periphery) and deployed them using ganache network, so when i start testing functions, i started with createPair() function located in UniswapV2Factory and it's working fine. But when i start using uniswapV2router functions like addliquidity() or swapexactTokensForTokens() it dosent't working, and throw error message :
Returned error: VM Exception while processing transaction: revert
This is my deploy file where i used addLiquidity() function located in testliquidity contract:
const { sendEther, pow } = require("./util");
const IERC20 = artifacts.require("IERC20");
const TestLiquidity = artifacts.require("TestLiquidity");
const { ethers } = require("ethers");
const TOKEN_A = "0xFDAc1a07bB190930c45113BA0119b4F9c964aAb9";
const TOKEN_B = "0x21A347769867E169AF7444fe85F4E4bdE4A9c97e";
const ROUTER = "0xeEea9fc1B8c453105258F09BCa4d06086a909c91";
const TOKEN_A_AMOUNT = pow(10, 18);
const TOKEN_B_AMOUNT = pow(10, 18);
module.exports = async function (deployer, networks, accounts) {
const tokenA = await IERC20.at(TOKEN_A);
const tokenB = await IERC20.at(TOKEN_B);
await deployer.deploy(TestLiquidity)
const testliquidity = await TestLiquidity.deployed()
await tokenA.approve(testliquidity.address, TOKEN_A_AMOUNT);
await tokenB.approve(testliquidity.address, TOKEN_B_AMOUNT);
let tx = await testliquidity.addLiquidity(
tokenA.address,
tokenB.address,
TOKEN_A_AMOUNT,
TOKEN_B_AMOUNT
);
};
and this is the testliquidity contract where i called the addliquidity() function:
contract TestLiquidity {
address private constant ROUTER = 0xeEea9fc1B8c453105258F09BCa4d06086a909c91;
event Log(string message, uint val);
function addLiquidity(
address _tokenA,
address _tokenB,
uint _amountA,
uint _amountB
) external {
IERC20(_tokenA).transferFrom(msg.sender, address(this), _amountA);
IERC20(_tokenB).transferFrom(msg.sender, address(this), _amountB);
IERC20(_tokenA).approve(ROUTER, _amountA);
IERC20(_tokenB).approve(ROUTER, _amountB);
(uint amountA, uint amountB, uint liquidity) =
IUniswapV2Router02(ROUTER).addLiquidity(
_tokenA,
_tokenB,
_amountA,
_amountB,
1,
1,
address(this),
block.timestamp
);
emit Log("amountA", amountA);
emit Log("amountB", amountB);
emit Log("liquidity", liquidity);
}
}
and here is my ERC20 tokens contracts tokenA and tokenB which i created to add them in my liquidity pair:
contract tokenA is ERC20 {
constructor() ERC20('USDC Coin', 'USDC') {
uint256 n = 1000;
_mint(msg.sender, n * 10**uint(decimals()));
}
contract tokenB is ERC20 {
constructor() ERC20('WBTC Coin', 'WBTC') {
uint256 n = 1000;
_mint(msg.sender, n * 10**uint(decimals()));
}
}
}
I can't undestant from where the problem exactly, i'm sure the uniswapV2 contracts are correct and well deployed.
