Umi SDK 入门

npm install \
  @metaplex-foundation/umi \
  @metaplex-foundation/umi-bundle-defaults \
  @solana/web3.js@1 \
  @metaplex-foundation/mpl-token-metadata

import { createUmi } from '@metaplex-foundation/umi-bundle-defaults';
import { mplTokenMetadata } from '@metaplex-foundation/mpl-token-metadata';

// 使用 Token Metadata 插件创建 Umi 实例
const umi = createUmi('https://api.devnet.solana.com')
  .use(mplTokenMetadata());

import { generateSigner, percentAmount } from '@metaplex-foundation/umi';
import { createNft } from '@metaplex-foundation/mpl-token-metadata';

// 生成新的铸币密钥对
const mint = generateSigner(umi);

// 创建 NFT
await createNft(umi, {
  mint,
  name: 'My NFT',
  uri: 'https://example.com/my-nft.json',
  sellerFeeBasisPoints: percentAmount(5.5),
}).sendAndConfirm(umi);

console.log('NFT created:', mint.publicKey);

import { fetchDigitalAsset } from '@metaplex-foundation/mpl-token-metadata';

const asset = await fetchDigitalAsset(umi, mintAddress);

console.log('Name:', asset.metadata.name);
console.log('URI:', asset.metadata.uri);
console.log('Seller Fee:', asset.metadata.sellerFeeBasisPoints);