Tokenizedefi

Source

TOKENIZE

Tokenize real word assets + shop core

07-07-2022

how to run:

  • deploy tokenize.sol with dependencies

how to change :

  • import tokenize.sol (jewelery shop), copy the functions and change them. i use virtual for this purpes.

included:

  • ierc20 for communication with all erc20 token, but not add functions in this bootcamp lecture
  • added flat version for friendly deploying
  • ierc165 for communication by other tokenized shop like this has maked by ishop.sol

more info:

  • when an item create by create function, an event called and tell new item minted from address(0). this item now tokenized from real world to the blockchain.
  • when the item created, a hash code generate for:
    • tracking (holders, warehouse, veritification)
  • creator of item is the shop address
  • after that listing the item for sell
  • or can transfer by shop address to any other address
  • when item is listed, can't transfer. need to cancel listing
  • after anyone buying the item, that item transfer to customer
  • now customer can list again
  • and each time you can run verify function for know that item is not fake

p.s:

  • how to tokenize real world into blockchain, without erc721/erc1155
  • how to make market/shop based on smart contracts

this tokenize contract : i teaching afew days ago from second bootcamp

Example = https://testnet.bscscan.com/address/0x1e2adb685159c692c4c4468bf70ec63212365cf2

Review

  • Create
function create(uint8 theType, uint8 material, uint256 price, string calldata ipfs) 
    external onlyShop virtual override returns (uint256 itemId)
{
    uint256 id = _id;
    (itemId, ) = _create(theType, material, price, ipfs);
    require(itemId > 0 && _id > id); // last security check
}
  • Change price
function changePrice(uint256 id, uint256 newPrice) 
    external payable virtual override isTheOwner(id) /*itemExist(id)*/ returns (bool) 
{
    uint256 oldPrice = _jewels[id].price;
    _changePrice(id, newPrice);
    require(oldPrice != _jewels[id].price, "why spend gas!");
    emit PriceChange(id, _msgSender(), oldPrice, newPrice, block.timestamp);
    return true;
}
  • Listing
function list(uint256 id, uint256 price) external isTheOwner(id) virtual override returns (bool)
{
    require(price > 0, "insane idea");
    require(_isListed[id] == false, "require de-list, or you can change price");
    _list(id, price);
    _isListed[id] = true;
    emit ListItem(id, _msgSender(), price, true, block.timestamp);
    return true;
}
  • Buy
function buy(uint256 id) external payable virtual override 
{
    require(_msgSender() != _jewels[id].owner, "gas spending is not allow");
    uint256 val = _msgValue();
    address oldOwner_ = _jewels[id].owner;
    require(val >= _jewels[id].price, "not enought fund for buy, check your funds");
    (bool sent, ) = oldOwner_.call{value: val}("");
    bool success = _buy(id);
    require(success && sent);
    if(_jewels[id].secondaryMarket == false){ _jewels[id].secondaryMarket = true; }
    _totalSell += 1;
    _totalValue += val;
    emit Transfer(id, oldOwner_, _msgSender(), _itemCertify[id], block.timestamp);
}