Transaction Submission

import {
  AddressLookupTableAccount,
  ComputeBudgetProgram,
  Connection,
  Keypair,
  PublicKey,
  TransactionInstruction,
  TransactionMessage,
  VersionedTransaction,
} from "@solana/web3.js";
import bs58 from "bs58";

// ── Types matching the /build response ───────────────────────────────────────

type ApiAccount = { pubkey: string; isSigner: boolean; isWritable: boolean };

type ApiInstruction = {
  programId: string;
  accounts: ApiAccount[];
  data: string; // base64
};

type BuildResponse = {
  computeBudgetInstructions: ApiInstruction[];
  setupInstructions: ApiInstruction[];
  swapInstruction: ApiInstruction;
  cleanupInstruction: ApiInstruction | null;
  otherInstructions: ApiInstruction[];
  tipInstruction: ApiInstruction;
  addressesByLookupTableAddress: Record<string, string[]> | null;
  blockhashWithMetadata: {
    blockhash: number[];
    lastValidBlockHeight: number;
  };
};

// ── Helpers ──────────────────────────────────────────────────────────────────

const CU_LIMIT_MAX = 1_400_000;

function toInstruction(ix: ApiInstruction): TransactionInstruction {
  return new TransactionInstruction({
    programId: new PublicKey(ix.programId),
    keys: ix.accounts.map((acc) => ({
      pubkey: new PublicKey(acc.pubkey),
      isSigner: acc.isSigner,
      isWritable: acc.isWritable,
    })),
    data: Buffer.from(ix.data, "base64"),
  });
}

// ── Main ─────────────────────────────────────────────────────────────────────

const API_KEY = process.env.JUPITER_API_KEY!;
const connection = new Connection(process.env.RPC_URL!);
const signer = Keypair.fromSecretKey(
  bs58.decode(process.env.BS58_PRIVATE_KEY!),
);

// 1. Call /build with your swap parameters
const buildRes = await fetch(
  "https://api.jup.ag/swap/v2/build?" +
    new URLSearchParams({
      inputMint: "So11111111111111111111111111111111111111112",
      outputMint: "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      amount: "100000000",
      taker: signer.publicKey.toString(),
      tipAmount: "1000000",
    }),
  { headers: { "x-api-key": API_KEY } },
);
const build: BuildResponse = await buildRes.json();

// 2. Collect instructions (excluding compute budget — we handle CU limit ourselves)
const instructions = [
  ...build.setupInstructions.map(toInstruction),
  toInstruction(build.swapInstruction),
  ...(build.cleanupInstruction
    ? [toInstruction(build.cleanupInstruction)]
    : []),
  ...build.otherInstructions.map(toInstruction),
  toInstruction(build.tipInstruction),
];

// 3. Resolve address lookup tables
const addressLookupTableAccounts: AddressLookupTableAccount[] = [];
for (const addr of Object.keys(build.addressesByLookupTableAddress ?? {})) {
  const result = await connection.getAddressLookupTable(new PublicKey(addr));
  if (result.value) addressLookupTableAccounts.push(result.value);
}

// 4. Transform blockhash from byte array to base58
const recentBlockhash = bs58.encode(
  Buffer.from(build.blockhashWithMetadata.blockhash),
);
const { lastValidBlockHeight } = build.blockhashWithMetadata;

// 5. Simulate with max CU limit to estimate actual usage
const simMessage = new TransactionMessage({
  payerKey: signer.publicKey,
  recentBlockhash,
  instructions: [
    ComputeBudgetProgram.setComputeUnitLimit({ units: CU_LIMIT_MAX }),
    ...instructions,
  ],
}).compileToV0Message(addressLookupTableAccounts);

const sim = await connection.simulateTransaction(
  new VersionedTransaction(simMessage),
  { sigVerify: false, replaceRecentBlockhash: true },
);

if (sim.value.err) {
  console.error("Simulation failed:", sim.value.err);
  process.exit(1);
}

// 6. Set CU limit to 120% of simulated usage (capped at max)
const estimatedCUL = sim.value.unitsConsumed
  ? Math.min(Math.ceil(sim.value.unitsConsumed * 1.2), CU_LIMIT_MAX)
  : CU_LIMIT_MAX;

// 7. Build final transaction: our CU limit + API's CU price + swap instructions
const messageV0 = new TransactionMessage({
  payerKey: signer.publicKey,
  recentBlockhash,
  instructions: [
    ComputeBudgetProgram.setComputeUnitLimit({ units: estimatedCUL }),
    ...build.computeBudgetInstructions.map(toInstruction),
    ...instructions,
  ],
}).compileToV0Message(addressLookupTableAccounts);

const transaction = new VersionedTransaction(messageV0);
transaction.sign([signer]);

// 8. Submit via /submit
const submitRes = await fetch("https://api.jup.ag/tx/v1/submit", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "x-api-key": API_KEY,
  },
  body: JSON.stringify({
    signedTransaction: Buffer.from(transaction.serialize()).toString("base64"),
  }),
});

const { signature } = await submitRes.json();
console.log("Transaction:", `https://solscan.io/tx/${signature}`);

import { SystemProgram, PublicKey } from "@solana/web3.js";

const TIP_ACCOUNTS = [
  "GGztQqQ6pCPaJQnNpXBgELr5cs3WwDakRbh1iEMzjgSJ",
  "2MFoS3MPtvyQ4Wh4M9pdfPjz6UhVoNbFbGJAskCPCj3h",
  "BQ72nSv9f3PRyRKCBnHLVrerrv37CYTHm5h3s9VSGQDV",
  "6U91aKa8pmMxkJwBCfPTmUEfZi6dHe7DcFq2ALvB2tbB",
  "4xDsmeTWPNjgSVSS1VTfzFq3iHZhp77ffPkAmkZkdu71",
  "CapuXNQoDviLvU1PxFiizLgPNQCxrsag1uMeyk6zLVps",
  "9nnLbotNTcUhvbrsA6Mdkx45Sm82G35zo28AqUvjExn8",
  "6LXutJvKUw8Q5ue2gCgKHQdAN4suWW8awzFVC6XCguFx",
  "HFqp6ErWHY6Uzhj8rFyjYuDya2mXUpYEk8VW75K9PSiY",
  "DSN3j1ykL3obAVNv7ZX49VsFCPe4LqzxHnmtLiPwY6xg",
  "69yhtoJR4JYPPABZcSNkzuqbaFbwHsCkja1sP1Q2aVT5",
  "HU23r7UoZbqTUuh3vA7emAGztFtqwTeVips789vqxxBw",
  "3LoAYHuSd7Gh8d7RTFnhvYtiTiefdZ5ByamU42vkzd76",
  "3CgvbiM3op4vjrrjH2zcrQUwsqh5veNVRjFCB9N6sRoD",
  "GP8StUXNYSZjPikyRsvkTbvRV1GBxMErb59cpeCJnDf1",
  "7iWnBRRhBCiNXXPhqiGzvvBkKrvFSWqqmxRyu9VyYBxE",
];

const tipIx = SystemProgram.transfer({
  fromPubkey: signer.publicKey,
  toPubkey: new PublicKey(
    TIP_ACCOUNTS[Math.floor(Math.random() * TIP_ACCOUNTS.length)]
  ),
  lamports: 1_000_000, // 0.001 SOL minimum
});

// Add tipIx to your transaction, sign, then submit via /submit