run forge fmt and leave audit notes up to claimNft
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// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.18;
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import {IERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
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import {ERC20ToGenerateNftFraccion} from "src/token/ERC20ToGenerateNftFraccion.sol";
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import {IERC721, ERC721} from "@openzeppelin/contracts/token/ERC721/ERC721.sol";
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import {IERC721Receiver} from "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
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import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
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/**
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* @title TokenDivider
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* @author Juan Pedro Ventura Baltian, 14 years old
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* @notice This contracts was created, with the intention to make a new market of nft franctions
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* There are a function to divide an nft, then you can sell and buy some fraction of nft, that are basicaly
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* erc20 tokens, each nft pegged to an nft.There are some validations, to make the platforme the most secure
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* as possible.This is the first project that i code alone, in blockchain, foundry and solidity.
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* Thank you so much for read it.
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*/
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contract TokenDivider is IERC721Receiver,Ownable {
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error TokenDivider__NotFromNftOwner();
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error TokenDivider__NotEnoughErc20Balance();
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error TokenDivider__NftTransferFailed();
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error TokenDivider__InsuficientBalance();
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error TokenDivider__CantTransferToAddressZero();
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error TokenDivider__TransferFailed();
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error TokenDivider__NftAddressIsZero();
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error TokenDivider__AmountCantBeZero();
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error TokenDivider__InvalidSeller();
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error TokenDivier__InvalidAmount();
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error TokenDivider__IncorrectEtherAmount();
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error TokenDivider__InsuficientEtherForFees();
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struct ERC20Info {
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address erc20Address;
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uint256 tokenId;
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}
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struct SellOrder {
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address seller;
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address erc20Address;
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uint256 price;
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uint256 amount;
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}
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/**
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* @dev balances Relates a user with an amount of a erc20 token, this erc20 tokens is an nft fraction
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@dev nftToErc20Info Relates an nft with the erc20 pegged, and othe data like the erc20 amount, or the tokenId
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@dev s_userToSellOrders Relates a user with an array of sell orders, that each sell order
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has a seller, an erc20 that is the token to sell, a price and an amount of erc20 to sell
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*/
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mapping(address user => mapping(address erc20Address => uint256 amount)) balances;
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mapping(address nft => ERC20Info) nftToErc20Info;
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mapping(address user => SellOrder[] orders) s_userToSellOrders;
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mapping(address erc20 => address nft) erc20ToNft;
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mapping(address erc20 => uint256 totalErc20Minted) erc20ToMintedAmount;
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event NftDivided(address indexed nftAddress, uint256 indexed amountErc20Minted, address indexed erc20Minted);
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event NftClaimed(address indexed nftAddress);
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event TokensTransfered(uint256 indexed amount, address indexed erc20Address);
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event OrderPublished(uint256 indexed amount, address indexed seller, address indexed nftPegged);
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event OrderSelled(address indexed buyer, uint256 price);
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/**
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*
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* Only the owner of the nft can call a function with this modifier
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*/
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modifier onlyNftOwner(address nft, uint256 tokenId) {
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if(msg.sender != IERC721(nft).ownerOf(tokenId)) {
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revert TokenDivider__NotFromNftOwner();
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}
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_;
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}
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constructor() Ownable(msg.sender) {}
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/**
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* @dev Handles the receipt of an ERC721 token. This function is called whenever an ERC721 token is transferred to this contract.
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*/
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function onERC721Received(
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address /* operator */,
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address /* from */,
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uint256 /* tokenId */,
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bytes calldata /* data */
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) external pure override returns (bytes4) {
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// Return this value to confirm the receipt of the NFT
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return this.onERC721Received.selector;
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}
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/**
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*
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* @param nftAddress The addres of the nft to divide
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* @param tokenId The id of the token to divide
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* @param amount The amount of erc20 tokens to mint for the nft
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*
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* @dev in this function, the nft passed as parameter, is locked by transfering it to this contract, then, it gives to the
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* person calling this function an amount of erc20, beeing like a fraction of this nft.
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*/
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function divideNft(address nftAddress, uint256 tokenId, uint256 amount) onlyNftOwner(nftAddress, tokenId) onlyNftOwner(nftAddress ,tokenId) external {
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if(nftAddress == address(0)) { revert TokenDivider__NftAddressIsZero(); }
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if(amount == 0) { revert TokenDivider__AmountCantBeZero(); }
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ERC20ToGenerateNftFraccion erc20Contract = new ERC20ToGenerateNftFraccion(
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string(abi.encodePacked(ERC721(nftAddress).name(), "Fraccion")),
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string(abi.encodePacked("F", ERC721(nftAddress).symbol())));
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erc20Contract.mint(address(this), amount);
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address erc20 = address(erc20Contract);
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IERC721(nftAddress).safeTransferFrom(msg.sender, address(this), tokenId, "");
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if(IERC721(nftAddress).ownerOf(tokenId) == msg.sender) { revert TokenDivider__NftTransferFailed(); }
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balances[msg.sender][erc20] = amount;
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nftToErc20Info[nftAddress] = ERC20Info({erc20Address: erc20, tokenId: tokenId});
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erc20ToMintedAmount[erc20] = amount;
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erc20ToNft[erc20] = nftAddress;
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emit NftDivided(nftAddress, amount, erc20);
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bool transferSuccess = IERC20(erc20).transfer(msg.sender, amount);
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if(!transferSuccess) {
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revert TokenDivider__TransferFailed();
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}
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}
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/**
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*
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* @param nftAddress The address of the nft to claim
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*
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* @dev in this function, if you have all the erc20 minted for the nft, you can call this function to claim the nft,
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* giving to the contract all the erc20 and it will give you back the nft
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*/
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function claimNft(address nftAddress) external {
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if(nftAddress == address(0)) {
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revert TokenDivider__NftAddressIsZero();
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}
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ERC20Info storage tokenInfo = nftToErc20Info[nftAddress];
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if(balances[msg.sender][tokenInfo.erc20Address] < erc20ToMintedAmount[tokenInfo.erc20Address]) {
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revert TokenDivider__NotEnoughErc20Balance();
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}
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ERC20ToGenerateNftFraccion(tokenInfo.erc20Address).burnFrom(msg.sender, erc20ToMintedAmount[tokenInfo.erc20Address]);
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balances[msg.sender][tokenInfo.erc20Address] = 0;
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erc20ToMintedAmount[tokenInfo.erc20Address] = 0;
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emit NftClaimed(nftAddress);
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IERC721(nftAddress).safeTransferFrom(address(this), msg.sender, tokenInfo.tokenId);
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}
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/**
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*
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* @param nftAddress The nft address pegged to the erc20
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* @param to The reciver of the erc20
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* @param amount The amount of erc20 to transfer
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*
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* @dev you can use this function to transfer nft franctions 100% securily and registered by te contract
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*/
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function transferErcTokens(address nftAddress,address to, uint256 amount) external {
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if(nftAddress == address(0)) {
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revert TokenDivider__NftAddressIsZero();
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}
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if(to == address(0)) {
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revert TokenDivider__CantTransferToAddressZero();
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}
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if(amount == 0) {
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revert TokenDivider__AmountCantBeZero();
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}
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ERC20Info memory tokenInfo = nftToErc20Info[nftAddress];
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if(to == address(0)) {
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revert TokenDivider__CantTransferToAddressZero();
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}
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if(balances[msg.sender][tokenInfo.erc20Address] < amount) {
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revert TokenDivider__NotEnoughErc20Balance();
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}
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balances[msg.sender][tokenInfo.erc20Address] -= amount;
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balances[to][tokenInfo.erc20Address] += amount;
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emit TokensTransfered(amount, tokenInfo.erc20Address);
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IERC20(tokenInfo.erc20Address).transferFrom(msg.sender,to, amount);
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}
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/**
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*
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* @param nftPegged The nft address pegged to the tokens to sell
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* @param price The price of all the tokens to sell
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* @param amount The amount of tokens to sell
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*
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* @dev this function creates a new order, is like publish you assets into a marketplace, where other persons can buy it.
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* firstly, once you call this function, the amount of tokens that you passed into as a parameter, get blocked, by sending it
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* to this contract, then a new order is created and published.
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*/
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function sellErc20(address nftPegged, uint256 price,uint256 amount) external {
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if(nftPegged == address(0)) {
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revert TokenDivider__NftAddressIsZero();
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}
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if( amount == 0) {
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revert TokenDivider__AmountCantBeZero();
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}
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ERC20Info memory tokenInfo = nftToErc20Info[nftPegged];
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if(balances[msg.sender][tokenInfo.erc20Address] < amount) {
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revert TokenDivider__InsuficientBalance();
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}
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balances[msg.sender][tokenInfo.erc20Address] -= amount;
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s_userToSellOrders[msg.sender].push(
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SellOrder({
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seller: msg.sender,
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erc20Address: tokenInfo.erc20Address,
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price: price,
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amount: amount
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})
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);
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emit OrderPublished(amount,msg.sender, nftPegged);
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IERC20(tokenInfo.erc20Address).transferFrom(msg.sender,address(this), amount);
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}
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/**
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*
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* @param orderIndex The index of the order in all the orders array of the seller (the seller can have multiple orders active)
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* @param seller The person who is selling this tokens
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*
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* @dev when the buyer call this function, the eth or any token accepted to pay, is sent to the seller
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* if the transfer executed correctly, then this contract, wich has all the tokens, send the tokens to the msg.sender
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*/
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function buyOrder(uint256 orderIndex, address seller) external payable {
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if(seller == address(0)) {
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revert TokenDivider__InvalidSeller();
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}
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SellOrder memory order = s_userToSellOrders[seller][orderIndex];
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if(msg.value < order.price) {
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revert TokenDivider__IncorrectEtherAmount();
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}
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uint256 fee = order.price / 100;
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uint256 sellerFee = fee / 2;
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if(msg.value < order.price + sellerFee) {
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revert TokenDivider__InsuficientEtherForFees();
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}
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balances[msg.sender][order.erc20Address] += order.amount;
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s_userToSellOrders[seller][orderIndex] = s_userToSellOrders[seller][s_userToSellOrders[seller].length - 1];
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s_userToSellOrders[seller].pop();
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emit OrderSelled(msg.sender, order.price);
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// Transfer The Ether
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(bool success, ) = payable(order.seller).call{value: (order.price - sellerFee)}("");
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if(!success) {
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revert TokenDivider__TransferFailed();
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}
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(bool taxSuccess, ) = payable(owner()).call{value: fee}("");
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if(!taxSuccess) {
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revert TokenDivider__TransferFailed();
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}
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IERC20(order.erc20Address).transfer(msg.sender, order.amount);
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}
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/** Getters */
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function getBalanceOf(address user, address token) public view returns(uint256) {
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return balances[user][token];
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}
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function getErc20TotalMintedAmount(address erc20) public view returns(uint256) {
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return erc20ToMintedAmount[erc20];
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}
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function getErc20InfoFromNft(address nft) public view returns(ERC20Info memory) {
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return nftToErc20Info[nft];
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}
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function getOrderPrice(address seller, uint256 index) public view returns(uint256 price) {
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price = s_userToSellOrders[seller][index].price;
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}
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}
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// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.18;
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import {IERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
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import {ERC20ToGenerateNftFraccion} from "src/token/ERC20ToGenerateNftFraccion.sol";
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import {IERC721, ERC721} from "@openzeppelin/contracts/token/ERC721/ERC721.sol";
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import {IERC721Receiver} from "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
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import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
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/**
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* @title TokenDivider
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* @author Juan Pedro Ventura Baltian, 14 years old
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* @notice This contracts was created, with the intention to make a new market of nft franctions
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* There are a function to divide an nft, then you can sell and buy some fraction of nft, that are basicaly
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* erc20 tokens, each nft pegged to an nft.There are some validations, to make the platforme the most secure
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* as possible.This is the first project that i code alone, in blockchain, foundry and solidity.
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* Thank you so much for read it.
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*/
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contract TokenDivider is IERC721Receiver, Ownable {
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error TokenDivider__NotFromNftOwner();
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error TokenDivider__NotEnoughErc20Balance();
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error TokenDivider__NftTransferFailed();
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error TokenDivider__InsuficientBalance();
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error TokenDivider__CantTransferToAddressZero();
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error TokenDivider__TransferFailed();
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error TokenDivider__NftAddressIsZero();
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error TokenDivider__AmountCantBeZero();
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error TokenDivider__InvalidSeller();
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error TokenDivier__InvalidAmount();
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error TokenDivider__IncorrectEtherAmount();
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error TokenDivider__InsuficientEtherForFees();
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struct ERC20Info {
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address erc20Address;
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uint256 tokenId;
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}
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struct SellOrder {
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address seller;
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address erc20Address;
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uint256 price;
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uint256 amount;
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}
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/**
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* @dev balances Relates a user with an amount of a erc20 token, this erc20 tokens is an nft fraction
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*
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* @dev nftToErc20Info Relates an nft with the erc20 pegged, and othe data like the erc20 amount, or the tokenId
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*
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* @dev s_userToSellOrders Relates a user with an array of sell orders, that each sell order
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* has a seller, an erc20 that is the token to sell, a price and an amount of erc20 to sell
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*/
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mapping(address user => mapping(address erc20Address => uint256 amount)) balances;
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mapping(address nft => ERC20Info) nftToErc20Info;
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mapping(address user => SellOrder[] orders) s_userToSellOrders;
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mapping(address erc20 => address nft) erc20ToNft;
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mapping(address erc20 => uint256 totalErc20Minted) erc20ToMintedAmount;
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event NftDivided(address indexed nftAddress, uint256 indexed amountErc20Minted, address indexed erc20Minted);
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event NftClaimed(address indexed nftAddress);
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event TokensTransfered(uint256 indexed amount, address indexed erc20Address);
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event OrderPublished(uint256 indexed amount, address indexed seller, address indexed nftPegged);
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event OrderSelled(address indexed buyer, uint256 price);
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/**
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*
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* Only the owner of the nft can call a function with this modifier
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*/
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modifier onlyNftOwner(address nft, uint256 tokenId) {
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if (msg.sender != IERC721(nft).ownerOf(tokenId)) {
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revert TokenDivider__NotFromNftOwner();
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}
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_;
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}
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constructor() Ownable(msg.sender) {}
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/**
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* @dev Handles the receipt of an ERC721 token. This function is called whenever an ERC721 token is transferred to this contract.
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*/
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function onERC721Received(
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address, /* operator */
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address, /* from */
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uint256, /* tokenId */
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bytes calldata /* data */
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) external pure override returns (bytes4) {
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// Return this value to confirm the receipt of the NFT
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return this.onERC721Received.selector;
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}
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/**
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*
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* @param nftAddress The addres of the nft to divide
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* @param tokenId The id of the token to divide
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* @param amount The amount of erc20 tokens to mint for the nft
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*
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* @dev in this function, the nft passed as parameter, is locked by transfering it to this contract, then, it gives to the
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* person calling this function an amount of erc20, beeing like a fraction of this nft.
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*/
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function divideNft(address nftAddress, uint256 tokenId, uint256 amount)
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external
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onlyNftOwner(nftAddress, tokenId)
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onlyNftOwner(nftAddress, tokenId)
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{
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if (nftAddress == address(0)) revert TokenDivider__NftAddressIsZero();
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if (amount == 0) revert TokenDivider__AmountCantBeZero();
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// @audit: there is no checking of inExistence tokenId, it might handled on modifier but need to check
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ERC20ToGenerateNftFraccion erc20Contract = new ERC20ToGenerateNftFraccion(
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string(abi.encodePacked(ERC721(nftAddress).name(), "Fraccion")),
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string(abi.encodePacked("F", ERC721(nftAddress).symbol()))
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);
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// @audit: can we mint again? out of this function?
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erc20Contract.mint(address(this), amount);
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address erc20 = address(erc20Contract);
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IERC721(nftAddress).safeTransferFrom(msg.sender, address(this), tokenId, "");
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// @audit: what if we send the NFT to other address during this period?
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if (IERC721(nftAddress).ownerOf(tokenId) == msg.sender) revert TokenDivider__NftTransferFailed();
|
||||
|
||||
balances[msg.sender][erc20] = amount;
|
||||
// @audit: what happen if the given nft address already registered in this CA, then another token id register again?
|
||||
nftToErc20Info[nftAddress] = ERC20Info({erc20Address: erc20, tokenId: tokenId});
|
||||
erc20ToMintedAmount[erc20] = amount;
|
||||
erc20ToNft[erc20] = nftAddress;
|
||||
|
||||
emit NftDivided(nftAddress, amount, erc20);
|
||||
|
||||
bool transferSuccess = IERC20(erc20).transfer(msg.sender, amount);
|
||||
if (!transferSuccess) {
|
||||
revert TokenDivider__TransferFailed();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
*
|
||||
* @param nftAddress The address of the nft to claim
|
||||
*
|
||||
* @dev in this function, if you have all the erc20 minted for the nft, you can call this function to claim the nft,
|
||||
* giving to the contract all the erc20 and it will give you back the nft
|
||||
*/
|
||||
function claimNft(address nftAddress) external {
|
||||
if (nftAddress == address(0)) {
|
||||
revert TokenDivider__NftAddressIsZero();
|
||||
}
|
||||
|
||||
// @audit: what if the nft address is not stored?
|
||||
ERC20Info storage tokenInfo = nftToErc20Info[nftAddress];
|
||||
|
||||
if (balances[msg.sender][tokenInfo.erc20Address] < erc20ToMintedAmount[tokenInfo.erc20Address]) {
|
||||
revert TokenDivider__NotEnoughErc20Balance();
|
||||
}
|
||||
|
||||
ERC20ToGenerateNftFraccion(tokenInfo.erc20Address).burnFrom(
|
||||
msg.sender, erc20ToMintedAmount[tokenInfo.erc20Address]
|
||||
);
|
||||
|
||||
balances[msg.sender][tokenInfo.erc20Address] = 0;
|
||||
erc20ToMintedAmount[tokenInfo.erc20Address] = 0;
|
||||
|
||||
emit NftClaimed(nftAddress);
|
||||
|
||||
// @audit: what happen if there is overlaps in same NFT address with different token id? will someone get a different NFT?
|
||||
IERC721(nftAddress).safeTransferFrom(address(this), msg.sender, tokenInfo.tokenId);
|
||||
}
|
||||
|
||||
/**
|
||||
*
|
||||
* @param nftAddress The nft address pegged to the erc20
|
||||
* @param to The reciver of the erc20
|
||||
* @param amount The amount of erc20 to transfer
|
||||
*
|
||||
* @dev you can use this function to transfer nft franctions 100% securily and registered by te contract
|
||||
*/
|
||||
function transferErcTokens(address nftAddress, address to, uint256 amount) external {
|
||||
if (nftAddress == address(0)) {
|
||||
revert TokenDivider__NftAddressIsZero();
|
||||
}
|
||||
|
||||
if (to == address(0)) {
|
||||
revert TokenDivider__CantTransferToAddressZero();
|
||||
}
|
||||
|
||||
if (amount == 0) {
|
||||
revert TokenDivider__AmountCantBeZero();
|
||||
}
|
||||
|
||||
ERC20Info memory tokenInfo = nftToErc20Info[nftAddress];
|
||||
|
||||
if (to == address(0)) {
|
||||
revert TokenDivider__CantTransferToAddressZero();
|
||||
}
|
||||
if (balances[msg.sender][tokenInfo.erc20Address] < amount) {
|
||||
revert TokenDivider__NotEnoughErc20Balance();
|
||||
}
|
||||
|
||||
balances[msg.sender][tokenInfo.erc20Address] -= amount;
|
||||
balances[to][tokenInfo.erc20Address] += amount;
|
||||
|
||||
emit TokensTransfered(amount, tokenInfo.erc20Address);
|
||||
|
||||
IERC20(tokenInfo.erc20Address).transferFrom(msg.sender, to, amount);
|
||||
}
|
||||
|
||||
/**
|
||||
*
|
||||
* @param nftPegged The nft address pegged to the tokens to sell
|
||||
* @param price The price of all the tokens to sell
|
||||
* @param amount The amount of tokens to sell
|
||||
*
|
||||
* @dev this function creates a new order, is like publish you assets into a marketplace, where other persons can buy it.
|
||||
* firstly, once you call this function, the amount of tokens that you passed into as a parameter, get blocked, by sending it
|
||||
* to this contract, then a new order is created and published.
|
||||
*/
|
||||
function sellErc20(address nftPegged, uint256 price, uint256 amount) external {
|
||||
if (nftPegged == address(0)) {
|
||||
revert TokenDivider__NftAddressIsZero();
|
||||
}
|
||||
|
||||
if (amount == 0) {
|
||||
revert TokenDivider__AmountCantBeZero();
|
||||
}
|
||||
|
||||
ERC20Info memory tokenInfo = nftToErc20Info[nftPegged];
|
||||
if (balances[msg.sender][tokenInfo.erc20Address] < amount) {
|
||||
revert TokenDivider__InsuficientBalance();
|
||||
}
|
||||
|
||||
balances[msg.sender][tokenInfo.erc20Address] -= amount;
|
||||
|
||||
s_userToSellOrders[msg.sender].push(
|
||||
SellOrder({seller: msg.sender, erc20Address: tokenInfo.erc20Address, price: price, amount: amount})
|
||||
);
|
||||
|
||||
emit OrderPublished(amount, msg.sender, nftPegged);
|
||||
|
||||
IERC20(tokenInfo.erc20Address).transferFrom(msg.sender, address(this), amount);
|
||||
}
|
||||
|
||||
/**
|
||||
*
|
||||
* @param orderIndex The index of the order in all the orders array of the seller (the seller can have multiple orders active)
|
||||
* @param seller The person who is selling this tokens
|
||||
*
|
||||
* @dev when the buyer call this function, the eth or any token accepted to pay, is sent to the seller
|
||||
* if the transfer executed correctly, then this contract, wich has all the tokens, send the tokens to the msg.sender
|
||||
*/
|
||||
function buyOrder(uint256 orderIndex, address seller) external payable {
|
||||
if (seller == address(0)) {
|
||||
revert TokenDivider__InvalidSeller();
|
||||
}
|
||||
|
||||
SellOrder memory order = s_userToSellOrders[seller][orderIndex];
|
||||
|
||||
if (msg.value < order.price) {
|
||||
revert TokenDivider__IncorrectEtherAmount();
|
||||
}
|
||||
|
||||
uint256 fee = order.price / 100;
|
||||
uint256 sellerFee = fee / 2;
|
||||
|
||||
if (msg.value < order.price + sellerFee) {
|
||||
revert TokenDivider__InsuficientEtherForFees();
|
||||
}
|
||||
|
||||
balances[msg.sender][order.erc20Address] += order.amount;
|
||||
|
||||
s_userToSellOrders[seller][orderIndex] = s_userToSellOrders[seller][s_userToSellOrders[seller].length - 1];
|
||||
s_userToSellOrders[seller].pop();
|
||||
|
||||
emit OrderSelled(msg.sender, order.price);
|
||||
|
||||
// Transfer The Ether
|
||||
|
||||
(bool success,) = payable(order.seller).call{value: (order.price - sellerFee)}("");
|
||||
|
||||
if (!success) {
|
||||
revert TokenDivider__TransferFailed();
|
||||
}
|
||||
|
||||
(bool taxSuccess,) = payable(owner()).call{value: fee}("");
|
||||
|
||||
if (!taxSuccess) {
|
||||
revert TokenDivider__TransferFailed();
|
||||
}
|
||||
|
||||
IERC20(order.erc20Address).transfer(msg.sender, order.amount);
|
||||
}
|
||||
|
||||
/**
|
||||
* Getters
|
||||
*/
|
||||
function getBalanceOf(address user, address token) public view returns (uint256) {
|
||||
return balances[user][token];
|
||||
}
|
||||
|
||||
function getErc20TotalMintedAmount(address erc20) public view returns (uint256) {
|
||||
return erc20ToMintedAmount[erc20];
|
||||
}
|
||||
|
||||
function getErc20InfoFromNft(address nft) public view returns (ERC20Info memory) {
|
||||
return nftToErc20Info[nft];
|
||||
}
|
||||
|
||||
function getOrderPrice(address seller, uint256 index) public view returns (uint256 price) {
|
||||
price = s_userToSellOrders[seller][index].price;
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user