4、部署合约并发布NFT 在发布NFT之前需要做一件事情，就是将一张图片上传到IPFS中。IPFS是一个分布式系统，用于存储和访问文件、网站、应用程序和数据，这有别于传统的文件存储，关于IPFS的内容，我们以后再讨论。目前互联网上有很多免费的IPFS服务提供商，比如：Pinata
准备制作NFT的图片 首先要准备一张图片，只要符合宽度在320和1080像素之间，长宽比在1.91:1和4:5之间的任何一张图片都可以。其次还要为这张图片制作一份Metadata文件，JSON格式如下：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 { "name" : "your NFT name" , "description" : "your NFT description" , "image" : "ipfs://CID" , "attributes" : [ { "trait_type" : "attributes1" , "value" : "attributes1 value" } , { "trait_type" : "attributes2" , "value" : "attributes1 value" } ] }
先上传图片到IPFS，以便获取图片的CID。然后将图片的CID填写到Metadata文件里。这样两个文件就准备齐了
修改truffle配置文件 在修改配置文件之前，先安装依赖包
1 ~/app $ npm install @truffle/hdwallet-provider
还需要再添加一份配置文件
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ~/app $ tree -Ial "node_modules" . ├── contracts │ ├── Migrations.sol │ └── TestNFT.sol ├── .env ├── migrations │ └── 1_initial_migration.js ├── package.json ├── package-lock.json ├── test │ └── testnft_test.js └── truffle-config.js 3 directories, 8 files
我们需要在配置文件中写入私钥和公钥。这两个值在Quorum VM的目录中查找:
1 /home/quorum/quorum-test-network/smart_contracts/permissioning/scripts
1 2 3 4 5 6 7 8 9 10 ls -al total 40 drwxrwxr-x 2 quorum quorum 4096 Jun 13 12:19 . drwxrwxr-x 4 quorum quorum 4096 Jun 13 12:19 .. -rwxrwxr-x 1 quorum quorum 141 Jun 13 12:19 compile.sh -rwxrwxr-x 1 quorum quorum 178 Jun 13 12:19 copyAndRestart.sh -rw-rw-r-- 1 quorum quorum 5123 Jun 13 12:19 deploy.js -rw-rw-r-- 1 quorum quorum 2219 Jun 13 12:19 deployEthers.js -rw-rw-r-- 1 quorum quorum 3602 Jun 13 12:19 keys.js -rw-rw-r-- 1 quorum quorum 5183 Jun 13 12:19 readme.md
在keys.js中可以找到3个accounts，任选一个：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 module.exports = { quorum: { validator*: {} rpcnode: {} member*: {} accounts: { "0xfe3b557e8fb62b89f4916b721be55ceb828dbd73" : { "privateKey" : "0x8f2a55949038a9610f50fb23b5883af3b4ecb3c3bb792cbcefbd1542c692be63" , }, "0x627306090abaB3A6e1400e9345bC60c78a8BEf57" : { "privateKey" : "0xc87509a1c067bbde78beb793e6fa76530b6382a4c0241e5e4a9ec0a0f44dc0d3" , }, "0xf17f52151EbEF6C7334FAD080c5704D77216b732" : { "privateKey" : "0xae6ae8e5ccbfb04590405997ee2d52d2b330726137b875053c36d94e974d162f" , }, } };
以下就是整个配置文件
1 2 3 4 MNEMONIC = "c87509a1c067bbde78beb793e6fa76530b6382a4c0241e5e4a9ec0a0f44dc0d3" API_URL = "https://chain.azure-api.net/testrpc" PRIVATE_KEY = "c87509a1c067bbde78beb793e6fa76530b6382a4c0241e5e4a9ec0a0f44dc0d3" PUBLIC_KEY = "0x627306090abaB3A6e1400e9345bC60c78a8BEf57"
再次修改truffle配置文件，这次我们需要加上用于部署合约的配置，provider的地址就是我们之前部署在Azure API Management的API地址：https://chain.azure-api.net/testrpc
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 require("dotenv" ).config(); const HDWalletProvider = require("@truffle/hdwallet-provider" ); const mnemonic = process.env.MNEMONIC; module.exports = { networks: { development: { provider: () => new HDWalletProvider(mnemonic, `https: network_id: "1337" , } , polygon_testnet: { provider: () => new HDWalletProvider(mnemonic, `https: network_id: 1337 , networkCheckTimeout: 9999 , confirmations: 4 , timeoutBlocks: 200 , skipDryRun: true , } } , mocha: { } , compilers: { solc: { version: "0.8.14" , } } , } ;
部署合约，当部署成功后我们会看到合约地址
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 ~/app $ truffle migrate --network polygon_testnet Compiling your contracts... =========================== > Everything is up to date , there is nothing to compile. Starting migrations... ====================== > Network name: 'polygon_testnet' > Network id : 1337 > Block gas limit : 700000000 (0x29b92700) 1_initial_migration.js ====================== Deploying 'Migrations' ---------------------- > transaction hash : 0x12390dd2093089ebd304e16835173556d419bf876d051b2fdfb66a1ee2d10e7a > Blocks: 1 Seconds: 9 > contract address: 0x68249ac64729F5e29f296ac0a670BDf9F6E6BeF9 > block number: 13236 > block timestamp: 1655274384 > account: 0xf0E2Db6C8dC6c681bB5D6aD121A107f300e9B2b5 > balance: 1000000000 > gas used: 290582 (0x46f16) > gas price: 0 gwei > value sent: 0 ETH > total cost: 0 ETH Pausing for 4 confirmations... ------------------------------- > confirmation number: 1 (block: 13237) > confirmation number: 2 (block: 13238) > confirmation number: 3 (block: 13239) > confirmation number: 4 (block: 13240) > Saving migration to chain. > Saving artifacts ------------------------------------- > Total cost: 0 ETH Summary ======= > Total deployments: 1 > Final cost: 0 ETH
发布NFT 先安装依赖包
1 ~/app $ npm install @alch/alchemy-web3
新建一个JS文件，用来编写发布NFT的方法。我们还发现在部署合约的时候自动创建了一个build文件夹，这个是其实合约的编译目录。
1 ~/app $ touch mint-nft.js
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 ~/app $ tree -Ial "node_modules" . ├── build │ └── contracts │ ├── Address.json │ ├── Context.json │ ├── Counters.json │ ├── ERC165.json │ ├── ERC721.json │ ├── ERC721URIStorage.json │ ├── IERC165.json │ ├── IERC721.json │ ├── IERC721Metadata.json │ ├── IERC721Receiver.json │ ├── Migrations.json │ ├── Ownable.json │ ├── Strings.json │ └── TestNFT.json ├── contracts │ ├── Migrations.sol │ └── TestNFT.sol ├── .env ├── migrations │ └── 1_initial_migration.js ├── mint-nft.js ├── package.json ├── package-lock.json ├── test │ └── testnft_test.js └── truffle-config.js 5 directories, 23 files
需要将之前部署合约后拿到的地址填写到发布代码中
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 require ('dotenv' ).config ();const API_URL = process.env .API_URL ;const PUBLIC_KEY = process.env .PUBLIC_KEY ;const PRIVATE_KEY = process.env .PRIVATE_KEY ;const { createAlchemyWeb3 } = require ("@alch/alchemy-web3" );const web3 = createAlchemyWeb3 (API_URL );const contract = require ("./build/contracts/TestNFT.json" );const contractAddress = "0x68249ac64729F5e29f296ac0a670BDf9F6E6BeF9" ;const nftContract = new web3.eth .Contract (contract.abi , contractAddress);async function mintNFT (tokenURI ) { const nonce = await web3.eth .getTransactionCount (PUBLIC_KEY , 'latest' ); const tx = { 'from' : PUBLIC_KEY , 'to' : contractAddress, 'nonce' : nonce, 'gas' : 500000 , 'data' : nftContract.methods .mintNFT (tokenURI, PUBLIC_KEY , web3.utils .toWei ("12" , "ether" )).encodeABI () }; const signPromise = web3.eth .accounts .signTransaction (tx, PRIVATE_KEY ) signPromise.then ((signedTx ) => { web3.eth .sendSignedTransaction ( signedTx.rawTransaction , function (err, hash ) { if (!err) { console .log ( "The hash of your transaction is: " , hash, "\nCheck Alchemy's Mempool to view the status of your transaction!" ) } else { console .log ( "Something went wrong when submitting your transaction:" ,err) } }) }) .catch ((err ) => { console .log (" Promise failed:" , err) }) } mintNFT ("ipfs://QmYGkmHAhySYR5vvizG4xoMEyLPs4h68swsg5BeStxL6uK" )
执行代码，发布NFT
1 2 3 ~/app $ node mint-nft.js The hash of your transaction is: 0x04e22aace4a65f96c913441b8851ae855ae01cc48b023696f69805fcd1bea5d9 Check Alchemy's Mempool to view the status of your transaction!
将NFT加载到钱包中
在部署测试环境的最后我们已经将测试环境添加到了MetaMask中，我们还需要将部署合约所用的账户导入MetaMask，并在账户的收藏品中导入NFT，合约地址是部署合约时返回的地址，ID号默认从1开始，导入后就可以在钱包中看到收藏品了
