Blockchain: A repository from JoonQ

pragma solidity ^0.5.11;

/* This is a Solidity Real Estate Smart Contact. Owner will enter property details and transactions can be executed to transfer ownership and pull records of property status.*/

// 0x5B38Da6a701c568545dCfcB03FcB875f56beddC4 | ETH ADDRESS OF CONTRACT OWNER // // 0xAb8483F64d9C6d1EcF9b849Ae677dD3315835cb2 | ETH ADDRESS OF SELLER // // 0x03C6FcED478cBbC9a4FAB34eF9f40767739D1Ff7 | ETH ADDRESS OF BUYER //

contract joonRealEstateContract{

// DEFINING STATE VARIABLES AND TYPE // address owner; uint propertyCount;

// INITIALIZES AND SETS THE PERSON/ETHEREUM ADDRESS WHO DEPLOY THE CONTRACT AS THE OWNER. SETS PROPERTY COUNT TO 1. // constructor() public{ owner = msg.sender; propertyCount = 1; }

struct property{
    uint propertyID;
    uint propertyValue;
    string propertyAddress;
    address ownerEthAddress;
    bool sold;
    //enum status { Pending, Sold }         /*CREATES STATUS - OF TYPE ENUM WITH TWO STATES NAMELY PENDING(0) OR SOLD(1).*/
}

// MAPS ADDRESS(KEY) TO STRUT PROPERTY(VALUES) AND NAMES EACH ENTRY SET AS MYPROPERTY[ADDRESS][N]. // mapping(address => property[]) public myProperty;

// MODIFIER NAMED ISOWNER,THIS CHECKS THAT SENDER OF CURRRENT MESSAGE (PERSON WHOM IS CURRENTLY CONNECTED TO THIS CONTRACT) IS OWNER // modifier isOwner { require(msg.sender == owner); _; /* _ IS THE PLACE HOLDER FOR THE BELOW CODE TO EXECUTE IF THE CONDITION ABOVE (MSG.SENDER IS INDEED OWNER)*/ }

/// SECTION A - ADD NEW PROPERTY /// function A_addProperty(uint _propertyValue, string memory _propertyAddress, address _ownerEthAddress) public isOwner{ property memory newProperty = property ({ propertyID: propertyCount, propertyValue: _propertyValue, propertyAddress: _propertyAddress, ownerEthAddress: _ownerEthAddress, sold: false /* NEW PROPERTY ADDED MARKED AS FALSE(NOT SOLD) */ }); myProperty[_ownerEthAddress].push(newProperty); propertyCount = propertyCount+1; }

/// SECTION B - BUY A PROPERTY (CHANGE OWNERSHIP) /// function B_buyProperty(uint _propertyID, address _newownerEthAddress) public returns (string memory){ require(msg.sender != _newownerEthAddress); for(uint i=0; i<(myProperty[msg.sender].length); i++) { if(myProperty[msg.sender][i].propertyID == _propertyID) { property memory newOwner = property ({ propertyID: _propertyID, propertyValue: myProperty[msg.sender][i].propertyValue, propertyAddress: myProperty[msg.sender][i].propertyAddress, ownerEthAddress: msg.sender, sold: true }); delete myProperty[msg.sender][i]; myProperty[_newownerEthAddress].push(newOwner); } } }

/// SECTION C - GET ALL LAND ID OF AN ADDRESS THAT ARE NOT SOLD /// uint [] notsold; function C_getUnsoldLandID(address _ownerEthAddress) public returns(uint[] memory) { for(uint i=0; i<notsold.length; i++) { delete notsold[i]; } for (uint i=0; i<myProperty[_ownerEthAddress].length; i++) { if(myProperty[_ownerEthAddress][i].sold == false) { notsold.push(myProperty[_ownerEthAddress][i].propertyID); } } return notsold; }

/// SECTION D - GET PROPERTY DETAILS USING PROPERTY ID AND ADDRESS /// function D_getPropertyDetails(uint _propertyID, address _ownerEthAddress) view public returns(uint, uint, string memory, address, bool) { for(uint i=0; i<myProperty[_ownerEthAddress].length; i++) { if(myProperty[_ownerEthAddress][i].propertyID == _propertyID) { return ( myProperty[_ownerEthAddress][i].propertyID, myProperty[_ownerEthAddress][i].propertyValue, myProperty[_ownerEthAddress][i].propertyAddress, myProperty[_ownerEthAddress][i].ownerEthAddress, myProperty[_ownerEthAddress][i].sold ); } } }

/// SECTION E - EDIT PROPERTY DETAILS /// function E_editPropertyDetails(uint _propertyID, uint _editPropertyValue, string memory _editPropertyAddress, address _editOwnerEthAddress, bool _editStatus) public { address propertyEthAddress = msg.sender;

    for (uint i=0; i<myProperty[propertyEthAddress].length; i++)
    {
        if (myProperty[propertyEthAddress][i].propertyID == _propertyID)
        {
            myProperty[propertyEthAddress][i].propertyValue = _editPropertyValue;
            myProperty[propertyEthAddress][i].propertyAddress = _editPropertyAddress;
            myProperty[propertyEthAddress][i].ownerEthAddress = _editOwnerEthAddress;
            myProperty[propertyEthAddress][i].sold = _editStatus;
        }
    }
}

}

JoonQ/Blockchain