Futures smart contract

As usual, we kick off the chapter by writing the smart contract code. First, create a directory called FuturesWeb3j (in your home folder) and initiate an empty Truffle project using truffle init.

Afterward, in the contracts/ folder, create a Futures.sol file with the following code:

contract CFutures {   
    address user;
    address hedger;
    address speculator;
    struct asset{
        uint id;
        uint Quantity;
        uint price;
        address seller;
        address buyer;
        uint date;
    }
    asset TradedAsset;

    event DepositEv(uint amount, address sender);

    function CFutures(
        uint assetID, 
        uint Quantity, 
        uint price,
        address buyer, 
        address seller, 
        uint date) public {
        TradedAsset.id = assetID;
        TradedAsset.Quantity = Quantity;
        TradedAsset.price = price;
        TradedAsset...