I see from demo site ( https://ethereum-boilerplate.github.io/ethereum-boilerplate ) and I want to using it in my project, hope someone can talk about it.
I think I will be go to another post for this lmao, thanks anyway
@IAmJaysWay hey there
i am currently following along with the tutorial but have run into an error
Could anyone who sees this tell me what have i done wrong here ?
Thanks in advance
How could I go about receiving NFTs on the Mumbai test net?
I tried Copying some of the NFT collections to the ropsten network but it doesnt any of the NFTs . Could someone help me out here ?
did u get ur doubt solved ? im facing the same issue…
i was wondering if u could help me
I created an account just to thank you for this - you absolute legend.
1 Like
Hey I appreciate it, that made my day haha
1 Like
I have seen the complete tutorial of nft marketplace and I want to make it now. but the source code of the smart contract showing in the video is not given in the description. can anyone give me the source code of the smart contract?
Here you go;
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Counters.sol";
import "github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/ERC721.sol";
import "github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/security/ReentrancyGuard.sol";
contract marketPlaceBoilerPlate is ReentrancyGuard {
using Counters for Counters.Counter;
Counters.Counter private _itemIds;
Counters.Counter private _itemsSold;
address public owner;
constructor() {
owner = msg.sender;
}
struct MarketItem {
uint itemId;
address nftContract;
uint256 tokenId;
address payable seller;
address payable owner;
uint256 price;
bool sold;
}
mapping(uint256 => MarketItem) private idToMarketItem;
event MarketItemCreated (
uint indexed itemId,
address indexed nftContract,
uint256 indexed tokenId,
address seller,
address owner,
uint256 price,
bool sold
);
event MarketItemSold (
uint indexed itemId,
address owner
);
function createMarketItem(
address nftContract,
uint256 tokenId,
uint256 price
) public payable nonReentrant {
require(price > 0, "Price must be greater than 0");
_itemIds.increment();
uint256 itemId = _itemIds.current();
idToMarketItem[itemId] = MarketItem(
itemId,
nftContract,
tokenId,
payable(msg.sender),
payable(address(0)),
price,
false
);
IERC721(nftContract).transferFrom(msg.sender, address(this), tokenId);
emit MarketItemCreated(
itemId,
nftContract,
tokenId,
msg.sender,
address(0),
price,
false
);
}
function createMarketSale(
address nftContract,
uint256 itemId
) public payable nonReentrant {
uint price = idToMarketItem[itemId].price;
uint tokenId = idToMarketItem[itemId].tokenId;
bool sold = idToMarketItem[itemId].sold;
require(msg.value == price, "Please submit the asking price in order to complete the purchase");
require(sold != true, "This Sale has alredy finnished");
emit MarketItemSold(
itemId,
msg.sender
);
idToMarketItem[itemId].seller.transfer(msg.value);
IERC721(nftContract).transferFrom(address(this), msg.sender, tokenId);
idToMarketItem[itemId].owner = payable(msg.sender);
_itemsSold.increment();
idToMarketItem[itemId].sold = true;
}
function fetchMarketItems() public view returns (MarketItem[] memory) {
uint itemCount = _itemIds.current();
uint unsoldItemCount = _itemIds.current() - _itemsSold.current();
uint currentIndex = 0;
MarketItem[] memory items = new MarketItem[](unsoldItemCount);
for (uint i = 0; i < itemCount; i++) {
if (idToMarketItem[i + 1].owner == address(0)) {
uint currentId = i + 1;
MarketItem storage currentItem = idToMarketItem[currentId];
items[currentIndex] = currentItem;
currentIndex += 1;
}
}
return items;
}
}
Thanks bro
It will help me lot
when i run yarn start:
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Search for the keywords to learn more about each error.
webpack 5.69.0 compiled with 1 error in 28364 ms
what do you mean renamin images 1 to n ?
When cronos chain will come in moralis?
Hi @Smart19,
I have it here: src\contracts\marketplaceBoilerplate.sol
Or if you do not have this file, this is my current version…
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
//import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Counters.sol";
//import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/ERC721.sol";
//import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/security/ReentrancyGuard.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/3458c1e8541ce0a0cd935828c9db8f9cbca988a0/contracts/utils/Counters.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/3458c1e8541ce0a0cd935828c9db8f9cbca988a0/contracts/token/ERC721/ERC721.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/3458c1e8541ce0a0cd935828c9db8f9cbca988a0/contracts/security/ReentrancyGuard.sol";
contract marketPlaceBoilerPlate is ReentrancyGuard {
using Counters for Counters.Counter;
Counters.Counter private _itemIds;
Counters.Counter private _itemsSold;
address public owner;
constructor() {
owner = msg.sender;
}
struct MarketItem {
uint itemId;
address nftContract;
uint256 tokenId;
address payable seller;
address payable owner;
uint256 price;
bool sold;
}
mapping(uint256 => MarketItem) private idToMarketItem;
event MarketItemCreated (
uint indexed itemId,
address indexed nftContract,
uint256 indexed tokenId,
address seller,
address owner,
uint256 price,
bool sold
);
event MarketItemSold (
uint indexed itemId,
address owner
);
function createMarketItem(
address nftContract,
uint256 tokenId,
uint256 price
) public payable nonReentrant {
require(price > 0, "Price must be greater than 0");
_itemIds.increment();
uint256 itemId = _itemIds.current();
idToMarketItem[itemId] = MarketItem(
itemId,
nftContract,
tokenId,
payable(msg.sender),
payable(address(0)),
price,
false
);
IERC721(nftContract).transferFrom(msg.sender, address(this), tokenId);
emit MarketItemCreated(
itemId,
nftContract,
tokenId,
msg.sender,
address(0),
price,
false
);
}
function createMarketSale(
address nftContract,
uint256 itemId
) public payable nonReentrant {
uint price = idToMarketItem[itemId].price;
uint tokenId = idToMarketItem[itemId].tokenId;
bool sold = idToMarketItem[itemId].sold;
require(msg.value == price, "Please submit the asking price in order to complete the purchase");
require(sold != true, "This Sale has alredy finnished");
emit MarketItemSold(
itemId,
msg.sender
);
//idToMarketItem[itemId].seller.transfer(msg.value);
// 24mar22 added ownerfee to send 1% of price to owner
uint ownerFee = price.div(100);
idToMarketItem[itemId].seller.transfer(msg.value - ownerFee);
idToMarketItem[itemId].owner.transfer(ownerFee);
IERC721(nftContract).transferFrom(address(this), msg.sender, tokenId);
idToMarketItem[itemId].owner = payable(msg.sender);
_itemsSold.increment();
idToMarketItem[itemId].sold = true;
}
function fetchMarketItems() public view returns (MarketItem[] memory) {
uint itemCount = _itemIds.current();
uint unsoldItemCount = _itemIds.current() - _itemsSold.current();
uint currentIndex = 0;
MarketItem[] memory items = new MarketItem[](unsoldItemCount);
for (uint i = 0; i < itemCount; i++) {
if (idToMarketItem[i + 1].owner == address(0)) {
uint currentId = i + 1;
MarketItem storage currentItem = idToMarketItem[currentId];
items[currentIndex] = currentItem;
currentIndex += 1;
}
}
return items;
}
}
/// Thanks for inspiration: https://github.com/dabit3/polygon-ethereum-nextjs-marketplace/
How can this be done automatically I.e. writing a function that fetch the required data from the database and get it return accordingly without having to go through the manual method. If you have a solution to this kindly share
Thanks
someone please help me.
I’m having trouble with the BUY function, and I’ve been working on it for 2 days but it doesn’t work, and I even tried to start over from scratch.
you have to approve first before registering nft to the market