Deploy a coin that is already long or short

const mint = Keypair.generate();

const tx = new Transaction().add(
  // 1. Allocate the mint account and pay its rent exemption.
  SystemProgram.createAccount({
    fromPubkey:      owner,
    newAccountPubkey: mint.publicKey,
    space:            MINT_SIZE,
    lamports:         await getMinimumBalanceForRentExemptMint(conn),
    programId:        TOKEN_PROGRAM_ID,
  }),

  // 2. Initialise it. You are both mint and freeze authority.
  createInitializeMint2Instruction(mint.publicKey, 6, owner, owner),

  // 3. Derive and create your associated token account.
  createAssociatedTokenAccountInstruction(owner, ata, owner, mint.publicKey),

  // 4. Mint the whole supply into it.
  createMintToInstruction(mint.publicKey, ata, owner, 1000000000000000n),

  // 5. Hand the mint authority to nobody. Irreversible.
  createSetAuthorityInstruction(mint.publicKey, owner, AuthorityType.MintTokens, null),
);

// The mint keypair signs for its own creation. Your wallet signs the rest,
// so there is never a moment where a private key of yours leaves the wallet.
tx.partialSign(mint);
const signed = await wallet.signTransaction(tx);
await conn.sendRawTransaction(signed.serialize());