├── .gitignore ├── LICENSE ├── README.md ├── contracts ├── GameLand.sol ├── Greeter.sol ├── MyNFT.sol └── TestERC721.sol ├── hardhat.config.js ├── package-lock.json ├── package.json ├── ppts ├── gameland_cn.pptx └── gameland_en.pptx ├── scripts ├── deploy.js └── sample-script.js ├── test └── gameland.js └── yarn.lock /.gitignore: -------------------------------------------------------------------------------- 1 | node_modules 2 | .env 3 | 4 | #Hardhat files 5 | cache 6 | artifacts 7 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We aim to fulfill the vision of a true DAO where each member is rewarded, to the extent that they are active participants in the community. All of the Origin products will be under the umbrella of this DAO. 17 | The initial and core Origin product is a protocol layer that enables peer to peer renting of ERC-721 non-fungible tokens (NFTs) on Ethereum Mainnet 18 | 19 | Gameland architecture in future will be multi-chained as most of the different chain games are on different public chains. 20 | The nature of NFT chain-crossing is different from the token one. Therefore, Gameland plan to establish multiple Chain Wallet smart contract leasing protocols on the platform to implement the cross chain NFT leasing system. 21 | 22 | 23 | ## Technology Stack 24 | * Client Framework - React + Typescript 25 | * Ethereum development environment - Solidity + Hardhat 26 | * Ethereum Web Client Library - Web3.js&Truffle/Ether.js&Waffle 27 | 28 | ## User Case(Ether only ) 29 | - Lenders(Lending an NFT) 30 | * On Gameland’s platform a user can lend one or multiple NFTs. By doing so this saves multiple rental transaction costs and merges them into one single cost 31 | * Lending implies transferring the NFT to our “escrow” smart contract to list it for rent 32 | * The NFT "Lender" specifies the following: 33 | * The Rental Price (how much you wish to be compensated daily; this is the daily borrow price) 34 | * The NFT Price (this is the collateral a borrower most put up to rent) 35 | * Max Rental Period (maximum number of days you wish to lend out your NFT) 36 | 37 | - Borrowers(Renting an NFT) 38 | * The “Borrower” must specify the duration (in days) that they would like to borrow the NFT for 39 | * This duration then gets multiplied by the lender's set rental price, the NFT price (collateral) gets added in, to arrive at the total rent price 40 | * This total rent price gets deducted from the borrower’s balance and sent to the Gameland contract which acts as an escrow 41 | * The NFT is then sent to the "Borrower" after successful transaction 42 | * The NFT price (collateral) is stored in Gameland’s contract and is returned to the NFT “Borrower” only upon successful return of the NFT to the “Lender” (NFT "Lender") 43 | * In the case that the NFT is not returned on time (rental duration has passed), the collateral can be claimed by the lender from the Gameland contract 44 | 45 | ## The process works as follow: 46 | * Lenders fill up the name, nature of the item and upload the image of it. 47 | * Gameland will then use the information above as a file and send it to IPFS to generate a CID 48 | * The CID and the lender address will be the parameters to call our ERC721 contract to mint a NFT 49 | * To call the functions at Gameland on UI, the NFT ID will be used to fetch the corresponding CID and the showcase will be rendered 50 | 51 | ## Road map 52 | Q3 2021 53 | * Testnet launch : including lending, borrowing, withdraw and liquidation etc. 54 | 55 | 56 | Q4 2021 57 | * Bugs fixing and function optimizations: imposing a fine as penalty instead of confiscating the collaterals 58 | * Collateral Free Rentals: direct project integrations with NFT games/projects enabling collateral free renting 59 | * L2 Solutions Support: Polygon 60 | * DAO Launch/Rollout : including Game Guild DAO and Gameland Governance DAO 61 | * Further blockchains/defi integrations (e.g: Aave and Compound): according to market demands/activity 62 | * Full Rental Statistics Dashboard 63 | * Live leaderboard showing top renters and lenders (With special NFT rewards to gamify experience) 64 | 65 | ## Tentative Milestones 66 | * UI building (1week) & Testing 67 | * Testnet launch(2weeks) : including lending, borrowing, withdraw and liquidation etc. 68 | * Bugs fixing and function optimizations(2weeks): imposing a fine as penalty instead of confiscating the collaterals 69 | 70 | ### Tentative future features 71 | Origin Oracle has three roles: Game NFT aggregation, Game NFT Price Discoverer and Data Verification Node. 72 | 1. Firstly, the origin collection node collects the attributes of NFTs (e.g AXIS) with different scarcity and varieties and the transaction prices in the market in different periods through trading platforms such as Opensea, and the system forms a certain value evaluation standard model. 73 | 2. Secondly, the game NFT price discoverer collects the price of the market game NFT in the origin game Dao and feeds the price to the origin system. After the system collects the price, a unified database is formed. Everyone can participate in the Oracle service and become a node in the Oracle system network 74 | 3. The data verification node is responsible for data verification and storage, providing more secure and reliable data and reducing malicious quotations. 75 | Dao governance mode, therefore, in the process of benchmarking the price range above, it is also necessary to carry out access constraints, governance and incentive measures for the corresponding participants, so that the dam can realize the quotation under normal rules and prevent quotation errors. So as to complete the pricing process of NFT 76 | -------------------------------------------------------------------------------- /contracts/GameLand.sol: -------------------------------------------------------------------------------- 1 | //SPDX-License-Identifier: Unlicense 2 | pragma solidity ^0.8.0; 3 | 4 | import "@openzeppelin/contracts/token/ERC721/utils/ERC721Holder.sol"; 5 | 6 | contract GameLand is ERC721Holder { 7 | //all nft programes 8 | address[] public nfts; 9 | address public owner; 10 | 11 | constructor() { 12 | owner = msg.sender; 13 | } 14 | 15 | struct Nft { 16 | //price in ether 17 | uint256 daily_price; 18 | uint256 duration; 19 | uint256 collatoral; 20 | uint256 total_amount; 21 | } 22 | 23 | struct borrowInfo { 24 | address borrower; 25 | uint256 due_date; 26 | } 27 | 28 | //NFT => (borrower, due_date) 29 | mapping(uint256 => borrowInfo) public borrow_status; 30 | 31 | //NFT => basci_info 32 | mapping(uint256 => Nft) public nft_basic_status; 33 | 34 | // nft => address, origin owner 35 | mapping(uint256 => address) public nft_owner; 36 | 37 | //if a NFT is borrowed or not 38 | mapping(uint256 => bool) public borrow_or_not; 39 | 40 | //nft_programe address to their position 41 | mapping(address => uint256) public programe_number; 42 | 43 | event Received(address from, address to, uint256 gameland_nft_id); 44 | 45 | event Withdrew(address from, address to, uint256 gameland_nft_id); 46 | 47 | event Rented(address from, address to, uint256 gameland_nft_id); 48 | 49 | event Confiscated(address caller, uint256 gameland_nft_id); 50 | 51 | modifier onlyOwner() { 52 | require(msg.sender == owner, "Not owner"); 53 | _; 54 | } 55 | 56 | function add_nft_program(address nft_programe_address) public onlyOwner { 57 | nfts.push(nft_programe_address); 58 | uint256 how_many_nft_programes_has_in_gameland = nfts.length; 59 | programe_number[nft_programe_address] = 60 | how_many_nft_programes_has_in_gameland - 61 | 1; 62 | } 63 | 64 | //NFT owner transfer the ownership to Gameland, set price, duration, collatoral in eth 65 | //need approval 66 | function deposit( 67 | uint256 daily_price, 68 | uint256 duration, 69 | //这是NFT合约里给NFT的id,用来直接作为参数调用合约，是从opensea api获取到的那个token_id字段 70 | uint256 nft_id, 71 | uint256 collatoral, 72 | //opensea api中的 primary_asset_contracts。address 73 | address nft_programe_address, 74 | // 前端计算，gameland_nft_id = uint(string(programe_index)+string(nft_id)),其中program_index=programe_number[nft_programe_address] 75 | uint256 gameland_nft_id 76 | ) public { 77 | //this function will check everything about nft 78 | (bool success, ) = nft_programe_address.call( 79 | abi.encodeWithSignature( 80 | "safeTransferFrom(address,address,uint256)", 81 | msg.sender, 82 | address(this), 83 | nft_id 84 | ) 85 | ); 86 | require(success); 87 | uint256 total_amount = daily_price * duration + collatoral; 88 | nft_basic_status[gameland_nft_id] = Nft( 89 | daily_price, 90 | duration, 91 | collatoral, 92 | total_amount 93 | ); 94 | nft_owner[gameland_nft_id] = msg.sender; 95 | borrow_or_not[gameland_nft_id] = false; 96 | emit Received(msg.sender, address(this), gameland_nft_id); 97 | } 98 | 99 | //owner withdraw the nft when it is not borrowed 100 | function withdrawnft( 101 | uint256 nft_id, 102 | address nft_programe_address, 103 | uint256 gameland_nft_id 104 | ) public { 105 | require(!borrow_or_not[gameland_nft_id], "The nft is borrowed"); 106 | require( 107 | msg.sender == nft_owner[gameland_nft_id], 108 | "Only owner can withdraw NFT" 109 | ); 110 | (bool success, ) = nft_programe_address.call( 111 | abi.encodeWithSignature( 112 | "safeTransferFrom(address,address,uint256)", 113 | address(this), 114 | msg.sender, 115 | nft_id 116 | ) 117 | ); 118 | require(success); 119 | delete nft_basic_status[gameland_nft_id]; 120 | delete nft_owner[gameland_nft_id]; 121 | delete borrow_or_not[gameland_nft_id]; 122 | emit Withdrew(address(this), msg.sender, gameland_nft_id); 123 | } 124 | 125 | // this function will transfer the rent to the owner 126 | function rent( 127 | uint256 nft_id, 128 | address nft_programe_address, 129 | uint256 gameland_nft_id 130 | ) public payable { 131 | require( 132 | nft_basic_status[gameland_nft_id].total_amount <= msg.value, 133 | "Not enough amount" 134 | ); 135 | require(!borrow_or_not[gameland_nft_id], "Already been borrowed"); 136 | (bool success, ) = nft_programe_address.call( 137 | abi.encodeWithSignature( 138 | "safeTransferFrom(address,address,uint256)", 139 | address(this), 140 | msg.sender, 141 | nft_id 142 | ) 143 | ); 144 | require(success); 145 | uint256 price = nft_basic_status[gameland_nft_id].daily_price * 146 | nft_basic_status[gameland_nft_id].duration; 147 | 148 | uint256 pay_to_owner = price - (price * 3) / 100; 149 | (bool rent_success, ) = nft_owner[gameland_nft_id].call{ 150 | value: pay_to_owner 151 | }(""); 152 | require(rent_success); 153 | 154 | uint256 duration = nft_basic_status[gameland_nft_id].duration; 155 | borrow_or_not[gameland_nft_id] = true; 156 | //fixed duration time 157 | borrow_status[gameland_nft_id] = borrowInfo( 158 | msg.sender, 159 | duration * 1 days + block.timestamp 160 | ); 161 | emit Rented(address(this), msg.sender, gameland_nft_id); 162 | } 163 | 164 | // borrower return the nft 165 | //need approval 166 | function _return( 167 | uint256 nft_id, 168 | address nft_programe_address, 169 | uint256 gameland_nft_id 170 | ) public { 171 | require( 172 | borrow_or_not[gameland_nft_id], 173 | "the nft has not been borrowed" 174 | ); 175 | (bool success, ) = nft_programe_address.call( 176 | abi.encodeWithSignature( 177 | "safeTransferFrom(address,address,uint256)", 178 | msg.sender, 179 | address(this), 180 | nft_id 181 | ) 182 | ); 183 | require(success); 184 | 185 | (bool collatoral_success, ) = borrow_status[gameland_nft_id] 186 | .borrower 187 | .call{value: nft_basic_status[gameland_nft_id].collatoral}(""); 188 | require(collatoral_success); 189 | 190 | delete borrow_status[gameland_nft_id]; 191 | delete borrow_or_not[gameland_nft_id]; 192 | 193 | emit Received(msg.sender, address(this), gameland_nft_id); 194 | } 195 | 196 | //owner take the collatoral when the borrower failed to return the nft 197 | function confiscation(uint256 gameland_nft_id) public { 198 | require( 199 | borrow_or_not[gameland_nft_id], 200 | "the nft has not been borrowed" 201 | ); 202 | require( 203 | msg.sender == nft_owner[gameland_nft_id], 204 | "Only owner can confiscate" 205 | ); 206 | require( 207 | borrow_status[gameland_nft_id].due_date <= block.timestamp, 208 | "Not yet" 209 | ); 210 | (bool success, ) = nft_owner[gameland_nft_id].call{ 211 | value: nft_basic_status[gameland_nft_id].collatoral 212 | }(""); 213 | require(success); 214 | nft_owner[gameland_nft_id] = borrow_status[gameland_nft_id].borrower; 215 | delete borrow_status[gameland_nft_id]; 216 | delete borrow_or_not[gameland_nft_id]; 217 | emit Confiscated(msg.sender, gameland_nft_id); 218 | } 219 | 220 | //added by ting 221 | function get_all_nfts() public view returns (address[] memory) { 222 | return nfts; 223 | } 224 | 225 | //added by ting 226 | function get_nft_allinfo(uint256 gameland_nft_id) 227 | public 228 | view 229 | returns ( 230 | uint256, 231 | uint256, 232 | uint256, 233 | uint256 234 | ) 235 | { 236 | return ( 237 | nft_basic_status[gameland_nft_id].daily_price, 238 | nft_basic_status[gameland_nft_id].duration, 239 | nft_basic_status[gameland_nft_id].collatoral, 240 | nft_basic_status[gameland_nft_id].total_amount 241 | ); 242 | } 243 | 244 | //Get the borrower, due_date, added by ting 245 | function get_borrow_info(uint256 gameland_nft_id) 246 | public 247 | view 248 | returns (address, uint256) 249 | { 250 | return ( 251 | borrow_status[gameland_nft_id].borrower, 252 | borrow_status[gameland_nft_id].due_date 253 | ); 254 | } 255 | 256 | //Check a NFT is borrowed or not, added by ting 257 | function check_the_borrow_status(uint256 gameland_nft_id) 258 | public 259 | view 260 | returns (bool) 261 | { 262 | return borrow_or_not[gameland_nft_id]; 263 | } 264 | 265 | //Query the owner of a NFT, added by ting 266 | function query_the_nft_owner(uint256 gameland_nft_id) 267 | public 268 | view 269 | returns (address) 270 | { 271 | return nft_owner[gameland_nft_id]; 272 | } 273 | } 274 | -------------------------------------------------------------------------------- /contracts/Greeter.sol: -------------------------------------------------------------------------------- 1 | //SPDX-License-Identifier: Unlicense 2 | pragma solidity ^0.8.0; 3 | 4 | import "hardhat/console.sol"; 5 | 6 | contract Greeter { 7 | string private greeting; 8 | 9 | constructor(string memory _greeting) { 10 | console.log("Deploying a Greeter with greeting:", _greeting); 11 | greeting = _greeting; 12 | } 13 | 14 | function greet() public view returns (string memory) { 15 | return greeting; 16 | } 17 | 18 | function setGreeting(string memory _greeting) public { 19 | console.log("Changing greeting from '%s' to '%s'", greeting, _greeting); 20 | greeting = _greeting; 21 | } 22 | } 23 | -------------------------------------------------------------------------------- /contracts/MyNFT.sol: -------------------------------------------------------------------------------- 1 | //SPDX-License-Identifier: Unlicense 2 | pragma solidity ^0.8.0; 3 | 4 | import "hardhat/console.sol"; 5 | import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; 6 | 7 | contract MyNFT is ERC721 { 8 | constructor() ERC721("MyNFT", "MyNFT") {} 9 | 10 | function mint(address to, uint256 tokenId) external { 11 | _safeMint(to, tokenId, ""); 12 | } 13 | } -------------------------------------------------------------------------------- /contracts/TestERC721.sol: -------------------------------------------------------------------------------- 1 | //SPDX-License-Identifier: Unlicense 2 | pragma solidity ^0.8.0; 3 | 4 | import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol"; 5 | import "@openzeppelin/contracts/utils/Counters.sol"; 6 | 7 | 8 | contract GameItem is ERC721URIStorage { 9 | using Counters for Counters.Counter; 10 | Counters.Counter private _tokenIds; 11 | 12 | constructor() ERC721("GameItem", "ITM") {} 13 | 14 | function awardItem(address player, string memory tokenURI) 15 | public 16 | returns (uint256) 17 | { 18 | _tokenIds.increment(); 19 | 20 | uint256 newItemId = _tokenIds.current(); 21 | _mint(player, newItemId); 22 | _setTokenURI(newItemId, tokenURI); 23 | 24 | return newItemId; 25 | } 26 | } -------------------------------------------------------------------------------- /hardhat.config.js: -------------------------------------------------------------------------------- 1 | require("@nomiclabs/hardhat-waffle"); 2 | 3 | // Replace this private key with your Ropsten account private key 4 | // To export your private key from Metamask, open Metamask and 5 | // go to Account Details > Export Private Key 6 | // Be aware of NEVER putting real Ether into testing accounts 7 | 8 | 9 | // This is a sample Hardhat task. To learn how to create your own go to 10 | // https://hardhat.org/guides/create-task.html 11 | task("accounts", "Prints the list of accounts", async (taskArgs, hre) => { 12 | const accounts = await hre.ethers.getSigners(); 13 | 14 | for (const account of accounts) { 15 | console.log(account.address); 16 | } 17 | }); 18 | 19 | const AURORA_PRIVATE_KEY = process.env.AURORA_PRIVATE_KEY; 20 | 21 | // You need to export an object to set up your config 22 | // Go to https://hardhat.org/config/ to learn more 23 | /** 24 | * @type import('hardhat/config').HardhatUserConfig 25 | */ 26 | module.exports = { 27 | solidity: "0.8.4", 28 | 29 | }; -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "devDependencies": { 3 | "@nomiclabs/hardhat-ethers": "^2.0.2", 4 | "@nomiclabs/hardhat-waffle": "^2.0.1", 5 | "chai": "^4.3.4", 6 | "ethereum-waffle": "^3.4.0", 7 | "ethers": "^5.4.7", 8 | "hardhat": "^2.6.4" 9 | }, 10 | "name": "origin", 11 | "version": "1.0.0", 12 | "main": "index.js", 13 | "dependencies": { 14 | "dotenv": "^9.0.2", 15 | "@openzeppelin/contracts": "^4.3.1" 16 | }, 17 | "scripts": { 18 | "test": "mocha" 19 | }, 20 | "author": "", 21 | "license": "ISC", 22 | "description": "", 23 | "optionalDependencies": { 24 | "fsevents": "^2.3.2" 25 | } 26 | } 27 | -------------------------------------------------------------------------------- /ppts/gameland_cn.pptx: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/bandotio/GameLand/648c028ed5903bf54168b5c7b95425f7c288600a/ppts/gameland_cn.pptx -------------------------------------------------------------------------------- /ppts/gameland_en.pptx: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/bandotio/GameLand/648c028ed5903bf54168b5c7b95425f7c288600a/ppts/gameland_en.pptx -------------------------------------------------------------------------------- /scripts/deploy.js: -------------------------------------------------------------------------------- 1 | // We require the Hardhat Runtime Environment explicitly here. This is optional 2 | // but useful for running the script in a standalone fashion through `node