Token decimals difference is not handled

Summary

Vulnerability Detail

Underlying tokens can have different decimals. But this is not handled in multiple places like the token valuation and deposits

deposits

        for (uint256 i = 0; i < tokens.length; i++) {
            if (ratiosX96[i] == 0) continue;
            uint256 ratioX96_ = FullMath.mulDiv(amounts[i], Q96, ratiosX96[i]);
            if (ratioX96_ < ratioX96) ratioX96 = ratioX96_;
        }
        if (ratioX96 == 0) revert ValueZero();

calculating tvl

    function calculateStack()
        public
        view
        returns (ProcessWithdrawalsStack memory s)
    {
     .......
        IPriceOracle priceOracle = IPriceOracle(configurator.priceOracle());
        for (uint256 i = 0; i < tokens.length; i++) {
            uint256 priceX96 = priceOracle.priceX96(address(this), tokens[i]);
            s.totalValue += FullMath.mulDiv(amounts[i], priceX96, Q96);
            s.ratiosX96Value += FullMath.mulDiv(s.ratiosX96[i], priceX96, Q96);
            s.erc20Balances[i] = IERC20(tokens[i]).balanceOf(address(this));
        }

This will cause the tokens to be incorrectly valued

Eg: if the deposit ratio is [50:50,eth:usdc], then a deposit of 1e6 usdc will make the maximum depositable weth amount to be 1e6 while it should actually be 1e18 weth

Impact

The token amounts to will be calculated incorrectly

Code Snippet

Tool used

Manual Review

Recommendation

Handle the decimal conversion for the underlying assets

Duplicate of #160

sherlock-audit / 2024-06-mellow-judging

hash - Token decimals difference is not handled #286