如何铸造 NFT（NFT 教程系列第 2/3 部分）

1npm install @alch/alchemy-web3

1require("dotenv").config()\nconst API_URL = process.env.API_URL\nconst { createAlchemyWeb3 } = require("@alch/alchemy-web3")\nconst web3 = createAlchemyWeb3(API_URL)
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1const contract = require("../artifacts/contracts/MyNFT.sol/MyNFT.json")
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1console.log(JSON.stringify(contract.abi))
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1node scripts/mint-nft.js
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1{\n  "attributes": [\n    {\n      "trait_type": "品种",\n      "value": "马尔济斯"\n    },\n    {\n      "trait_type": "眼睛颜色",\n      "value": "摩卡"\n    }\n  ],\n  "description": "世界上最可爱、最敏感的小狗。",\n  "image": "ipfs://QmWmvTJmJU3pozR9ZHFmQC2DNDwi2XJtf3QGyYiiagFSWb",\n  "name": "Ramses"\n}
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1const contractAddress = "0x5a738a5c5fe46a1fd5ee7dd7e38f722e2aef7778"\n\nconst nftContract = new web3.eth.Contract(contract.abi, contractAddress)
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1API_URL = "https://eth-sepolia.g.alchemy.com/v2/你的-api-密钥"\nPRIVATE_KEY = "你的-私有-账户-地址"\nPUBLIC_KEY = "你的-公共-账户-地址"
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1   require('dotenv').config();\n   const API_URL = process.env.API_URL;\n   const PUBLIC_KEY = process.env.PUBLIC_KEY;\n   const PRIVATE_KEY = process.env.PRIVATE_KEY;\n\n   const { createAlchemyWeb3 } = require("@alch/alchemy-web3");\n   const web3 = createAlchemyWeb3(API_URL);\n\n   const contract = require("../artifacts/contracts/MyNFT.sol/MyNFT.json");\n   const contractAddress = "0x5a738a5c5fe46a1fd5ee7dd7e38f722e2aef7778";\n   const nftContract = new web3.eth.Contract(contract.abi, contractAddress);\n\n   async function mintNFT(tokenURI) {\n     const nonce = await web3.eth.getTransactionCount(PUBLIC_KEY, 'latest'); //获取最新的 nonce\n\n   //交易\n     const tx = {\n       'from': PUBLIC_KEY,\n       'to': contractAddress,\n       'nonce': nonce,\n       'gas': 500000,\n       'data': nftContract.methods.mintNFT(PUBLIC_KEY, tokenURI).encodeABI()\n     };\n   }​
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1require("dotenv").config()\nconst API_URL = process.env.API_URL\nconst PUBLIC_KEY = process.env.PUBLIC_KEY\nconst PRIVATE_KEY = process.env.PRIVATE_KEY\n\nconst { createAlchemyWeb3 } = require("@alch/alchemy-web3")\nconst web3 = createAlchemyWeb3(API_URL)\n\nconst contract = require("../artifacts/contracts/MyNFT.sol/MyNFT.json")\nconst contractAddress = "0x5a738a5c5fe46a1fd5ee7dd7e38f722e2aef7778"\nconst nftContract = new web3.eth.Contract(contract.abi, contractAddress)\n\nasync function mintNFT(tokenURI) {\n  const nonce = await web3.eth.getTransactionCount(PUBLIC_KEY, "latest") //获取最新的 nonce\n\n  //交易\n  const tx = {\n    from: PUBLIC_KEY,\n    to: contractAddress,\n    nonce: nonce,\n    gas: 500000,\n    data: nftContract.methods.mintNFT(PUBLIC_KEY, tokenURI).encodeABI(),\n  }\n\n  const signPromise = web3.eth.accounts.signTransaction(tx, PRIVATE_KEY)\n  signPromise\n    .then((signedTx) => {\n      web3.eth.sendSignedTransaction(\n        signedTx.rawTransaction,\n        function (err, hash) {\n          if (!err) {\n            console.log(\n              "你的交易哈希是：",\n              hash,\n              "\n检查 Alchemy 的内存池 (Mempool) 来查看你的交易状态！"\n            )\n          } else {\n            console.log(\n              "提交交易时出错了：",\n              err\n            )\n          }\n        }\n      )\n    })\n    .catch((err) => {\n      console.log(" Promise 失败：", err)\n    })\n}
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1require("dotenv").config()\nconst API_URL = process.env.API_URL\nconst PUBLIC_KEY = process.env.PUBLIC_KEY\nconst PRIVATE_KEY = process.env.PRIVATE_KEY\n\nconst { createAlchemyWeb3 } = require("@alch/alchemy-web3")\nconst web3 = createAlchemyWeb3(API_URL)\n\nconst contract = require("../artifacts/contracts/MyNFT.sol/MyNFT.json")\nconst contractAddress = "0x5a738a5c5fe46a1fd5ee7dd7e38f722e2aef7778"\nconst nftContract = new web3.eth.Contract(contract.abi, contractAddress)\n\nasync function mintNFT(tokenURI) {\n  const nonce = await web3.eth.getTransactionCount(PUBLIC_KEY, "latest") //获取最新的 nonce\n\n  //交易\n  const tx = {\n    from: PUBLIC_KEY,\n    to: contractAddress,\n    nonce: nonce,\n    gas: 500000,\n    data: nftContract.methods.mintNFT(PUBLIC_KEY, tokenURI).encodeABI(),\n  }\n\n  const signPromise = web3.eth.accounts.signTransaction(tx, PRIVATE_KEY)\n  signPromise\n    .then((signedTx) => {\n      web3.eth.sendSignedTransaction(\n        signedTx.rawTransaction,\n        function (err, hash) {\n          if (!err) {\n            console.log(\n              "你的交易哈希是：",\n              hash,\n              "\n检查 Alchemy 的内存池 (Mempool) 来查看你的交易状态！"\n            )\n          } else {\n            console.log(\n              "提交交易时出错了：",\n              err\n            )\n          }\n        }\n      )\n    })\n    .catch((err) => {\n      console.log("Promise 失败：", err)\n    })\n}\n\nmintNFT("ipfs://QmYueiuRNmL4MiA2GwtVMm6ZagknXnSpQnB3z2gWbz36hP")
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1你的交易哈希为：0x301791fdf492001fcd9d5e5b12f3aa1bbbea9a88ed24993a8ab2cdae2d06e1e8\n\n请检查 Alchemy 的内存池 (Mempool)，查看你的交易状态！