function deposit(
    uint256 _amount,
    address _token,
    address _strategy,
    address _to
) external payable override nonReentrant returns (uint256) {
    require(_to != address(0), 'SavingsAccount::deposit receiver address should not be zero address');
    uint256 _sharesReceived = _deposit(_amount, _token, _strategy);
    balanceInShares[_to][_token][_strategy] = balanceInShares[_to][_token][_strategy].add(_sharesReceived);
    emit Deposited(_to, _sharesReceived, _token, _strategy);
    return _sharesReceived;
}

function getTokensForShares(uint256 shares, address asset) public view override returns (uint256 amount) {
    if (shares == 0) return 0;
    address aToken = liquidityToken(asset);

    (, , , , , , , uint256 liquidityIndex, , ) = IProtocolDataProvider(protocolDataProvider).getReserveData(asset);

    // @audit-info tries to do (user shares / total shares) * underlying amount where underlying amount = scaledBalance * liquidityIndex
    amount = IScaledBalanceToken(aToken).scaledBalanceOf(address(this)).mul(liquidityIndex).mul(shares).div(
        IERC20(aToken).balanceOf(address(this))
    );
}
