Kit SDKを使用したはじめに

npm install \
  @solana/kit \
  @metaplex-foundation/mpl-token-metadata-kit

import { createSolanaRpc, createSolanaRpcSubscriptions, generateKeyPairSigner } from '@solana/kit';

// RPC接続を作成
const rpc = createSolanaRpc('https://api.devnet.solana.com');
const rpcSubscriptions = createSolanaRpcSubscriptions('wss://api.devnet.solana.com');

// キーペアを生成またはロード
const authority = await generateKeyPairSigner();

import {
  appendTransactionMessageInstructions,
  createTransactionMessage,
  getSignatureFromTransaction,
  type Instruction,
  type TransactionSigner,
  pipe,
  sendAndConfirmTransactionFactory,
  setTransactionMessageFeePayer,
  setTransactionMessageLifetimeUsingBlockhash,
  signTransactionMessageWithSigners,
} from '@solana/kit';

async function sendAndConfirm(options: {
  instructions: Instruction[];
  payer: TransactionSigner;
}) {
  const { instructions, payer } = options;
  const { value: latestBlockhash } = await rpc.getLatestBlockhash().send();

  const transactionMessage = pipe(
    createTransactionMessage({ version: 0 }),
    (tx) => setTransactionMessageFeePayer(payer.address, tx),
    (tx) => setTransactionMessageLifetimeUsingBlockhash(latestBlockhash, tx),
    (tx) => appendTransactionMessageInstructions(instructions, tx),
  );

  // インストラクションアカウントにアタッチされたすべての署名者で署名
  const signedTransaction = await signTransactionMessageWithSigners(transactionMessage);

  const sendAndConfirmTx = sendAndConfirmTransactionFactory({ rpc, rpcSubscriptions });
  await sendAndConfirmTx(signedTransaction, { commitment: 'confirmed' });

  return getSignatureFromTransaction(signedTransaction);
}

import { generateKeyPairSigner } from '@solana/kit';
import { createNft } from '@metaplex-foundation/mpl-token-metadata-kit';

// キーペアを生成
const mint = await generateKeyPairSigner();
const authority = await generateKeyPairSigner();

// NFTを作成してミント
const [createIx, mintIx] = await createNft({
  mint,
  authority,
  payer: authority,
  name: 'My NFT',
  uri: 'https://example.com/my-nft.json',
  sellerFeeBasisPoints: 550, // 5.5%
  tokenOwner: authority.address,
});

// トランザクションを送信
const sx = await sendAndConfirm({
  instructions: [createIx, mintIx],
  payer: authority,
});

console.log('NFT created:', mint.address);
console.log('Signature:', sx);

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

const asset = await fetchDigitalAsset(rpc, mintAddress);

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