    function sellCreditMarket(SellCreditMarketParams memory params) external payable override(ISize) whenNotPaused {
        state.validateSellCreditMarket(params);
        uint256 amount = state.executeSellCreditMarket(params);
        if (params.creditPositionId == RESERVED_ID) {
            state.validateUserIsNotBelowOpeningLimitBorrowCR(msg.sender);
        }
        // @audit validate liquidity after execution??
        state.validateVariablePoolHasEnoughLiquidity(amount);
    }
    function validateSellCreditMarket(State storage state, SellCreditMarketParams calldata params) external view {
        ...
        state.data.borrowAToken.transferFrom(params.lender, msg.sender, cashAmountOut);
        state.data.borrowAToken.transferFrom(params.lender, state.feeConfig.feeRecipient, fees);
    }
    function validateVariablePoolHasEnoughLiquidity(State storage state, uint256 amount) public view {
        uint256 liquidity = state.data.underlyingBorrowToken.balanceOf(address(state.data.variablePool));
        if (liquidity < amount) {
            revert Errors.NOT_ENOUGH_BORROW_ATOKEN_LIQUIDITY(liquidity, amount);
        }
    }
