SDK変更点（ベータ版）

pnpm add @solana/kora@beta

// Estimate bundle fees
const estimate = await client.estimateBundleFee({
  transactions: [base64Tx1, base64Tx2],
  fee_token: "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"
});

// Sign a bundle without submitting
const { signed_transactions } = await client.signBundle({
  transactions: [base64Tx1, base64Tx2, base64Tx3],
  signer_key: koraSignerAddress
});

// Sign and submit a bundle to Jito
const { bundle_uuid } = await client.signAndSendBundle({
  transactions: [base64Tx1, base64Tx2, base64Tx3],
  signer_key: koraSignerAddress
});

const { version } = await client.getVersion();
console.log("Kora server version:", version);