NFT 발행 방법(NFT 튜토리얼 시리즈 2/3부)

1npm install @alch/alchemy-web3

1require("dotenv").config()
2const API_URL = process.env.API_URL
3const { createAlchemyWeb3 } = require("@alch/alchemy-web3")
4const 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{
2  "attributes": [
3    {
4      "trait_type": "Breed",
5      "value": "Maltipoo"
6    },
7    {
8      "trait_type": "Eye color",
9      "value": "Mocha"
10    }
11  ],
12  "description": "The world's most adorable and sensitive pup.",
13  "image": "ipfs://QmWmvTJmJU3pozR9ZHFmQC2DNDwi2XJtf3QGyYiiagFSWb",
14  "name": "Ramses"
15}
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1const contractAddress = "0x5a738a5c5fe46a1fd5ee7dd7e38f722e2aef7778"
2
3const nftContract = new web3.eth.Contract(contract.abi, contractAddress)
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1API_URL = "https://eth-sepolia.g.alchemy.com/v2/your-api-key"
2PRIVATE_KEY = "your-private-account-address"
3PUBLIC_KEY = "your-public-account-address"
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1   require('dotenv').config();
2   const API_URL = process.env.API_URL;
3   const PUBLIC_KEY = process.env.PUBLIC_KEY;
4   const PRIVATE_KEY = process.env.PRIVATE_KEY;
5
6   const { createAlchemyWeb3 } = require("@alch/alchemy-web3");
7   const web3 = createAlchemyWeb3(API_URL);
8
9   const contract = require("../artifacts/contracts/MyNFT.sol/MyNFT.json");
10   const contractAddress = "0x5a738a5c5fe46a1fd5ee7dd7e38f722e2aef7778";
11   const nftContract = new web3.eth.Contract(contract.abi, contractAddress);
12
13   async function mintNFT(tokenURI) {
14     const nonce = await web3.eth.getTransactionCount(PUBLIC_KEY, 'latest'); //최신 논스 가져오기
15
16   //트랜잭션
17     const tx = {
18       'from': PUBLIC_KEY,
19       'to': contractAddress,
20       'nonce': nonce,
21       'gas': 500000,
22       'data': nftContract.methods.mintNFT(PUBLIC_KEY, tokenURI).encodeABI()
23     };
24   }​
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1require("dotenv").config()
2const API_URL = process.env.API_URL
3const PUBLIC_KEY = process.env.PUBLIC_KEY
4const PRIVATE_KEY = process.env.PRIVATE_KEY
5
6const { createAlchemyWeb3 } = require("@alch/alchemy-web3")
7const web3 = createAlchemyWeb3(API_URL)
8
9const contract = require("../artifacts/contracts/MyNFT.sol/MyNFT.json")
10const contractAddress = "0x5a738a5c5fe46a1fd5ee7dd7e38f722e2aef7778"
11const nftContract = new web3.eth.Contract(contract.abi, contractAddress)
12
13async function mintNFT(tokenURI) {
14  const nonce = await web3.eth.getTransactionCount(PUBLIC_KEY, "latest") //최신 논스 가져오기
15
16  //트랜잭션
17  const tx = {
18    from: PUBLIC_KEY,
19    to: contractAddress,
20    nonce: nonce,
21    gas: 500000,
22    data: nftContract.methods.mintNFT(PUBLIC_KEY, tokenURI).encodeABI(),
23  }
24
25  const signPromise = web3.eth.accounts.signTransaction(tx, PRIVATE_KEY)
26  signPromise
27    .then((signedTx) => {
28      web3.eth.sendSignedTransaction(
29        signedTx.rawTransaction,
30        function (err, hash) {
31          if (!err) {
32            console.log(
33              "트랜잭션의 해시는 다음과 같습니다: ",
34              hash,
35              "\nAlchemy의 Mempool에서 트랜잭션 상태를 확인하세요!"
36            )
37          } else {
38            console.log(
39              "트랜잭션을 제출하는 동안 문제가 발생했습니다:",
40              err
41            )
42          }
43        }
44      )
45    })
46    .catch((err) => {
47      console.log(" Promise 실패:", err)
48    })
49}
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1require("dotenv").config()
2const API_URL = process.env.API_URL
3const PUBLIC_KEY = process.env.PUBLIC_KEY
4const PRIVATE_KEY = process.env.PRIVATE_KEY
5
6const { createAlchemyWeb3 } = require("@alch/alchemy-web3")
7const web3 = createAlchemyWeb3(API_URL)
8
9const contract = require("../artifacts/contracts/MyNFT.sol/MyNFT.json")
10const contractAddress = "0x5a738a5c5fe46a1fd5ee7dd7e38f722e2aef7778"
11const nftContract = new web3.eth.Contract(contract.abi, contractAddress)
12
13async function mintNFT(tokenURI) {
14  const nonce = await web3.eth.getTransactionCount(PUBLIC_KEY, "latest") //최신 논스 가져오기
15
16  //트랜잭션
17  const tx = {
18    from: PUBLIC_KEY,
19    to: contractAddress,
20    nonce: nonce,
21    gas: 500000,
22    data: nftContract.methods.mintNFT(PUBLIC_KEY, tokenURI).encodeABI(),
23  }
24
25  const signPromise = web3.eth.accounts.signTransaction(tx, PRIVATE_KEY)
26  signPromise
27    .then((signedTx) => {
28      web3.eth.sendSignedTransaction(
29        signedTx.rawTransaction,
30        function (err, hash) {
31          if (!err) {
32            console.log(
33              "트랜잭션의 해시는 다음과 같습니다: ",
34              hash,
35              "\nAlchemy의 Mempool에서 트랜잭션 상태를 확인하세요!"
36            )
37          } else {
38            console.log(
39              "트랜잭션을 제출하는 동안 문제가 발생했습니다:",
40              err
41            )
42          }
43        }
44      )
45    })
46    .catch((err) => {
47      console.log("Promise 실패:", err)
48    })
49}
50
51mintNFT("ipfs://QmYueiuRNmL4MiA2GwtVMm6ZagknXnSpQnB3z2gWbz36hP")
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1트랜잭션의 해시는 다음과 같습니다: 0x301791fdf492001fcd9d5e5b12f3aa1bbbea9a88ed24993a8ab2cdae2d06e1e8
2
3Alchemy의 Mempool에서 트랜잭션 상태를 확인하세요!