metaplex candy machine mintV2 Java implementation of Umi mintV2

[solpower]

mint is not success， sendTransaction and response the signature , But the blockchain browser does not have this transaction
Where should I troubleshoot the problem? Can give some help?

{"jsonrpc":"2.0","result":"5NkPinTA2mYDnXNAdSXpRZypkzHWHDAfpKP154QruzxDAuPvWRkXz1CioXwNmatfmSuA2ViBeQpADNdfyPLv96LQ","id":"f67457cd-f4fb-4b70-bc7d-f5097d0e3222"}

[solpower]

Is there any problem with the following code? Use Umi Sdk to pass the following parameters, there is no problem

public static void mintV2() throws Exception {
PublicKey programId = new PublicKey("CndyV3LdqHUfDLmE5naZjVN8rBZz4tqhdefbAnjHG3JR"); //

    List<AccountMeta> accounts = getAccount();
    byte[] datas = getTransData(); // System.out.println(b & 0x0FF);

    Transaction trans = new Transaction();
    trans.addInstruction(computeUnitPrice()); 
    trans.addInstruction(computeUnitLimit()); 
    trans.addInstruction(new TransactionInstruction(programId, accounts, datas));
    Account signer = new Account(Base58.decode(secret_key));

    List<Account> signers = Arrays.asList(signer, nftMint);
    String signature = client.getApi().sendTransaction(trans, signers, null);
    System.out.println(signature);

}

public static List getAccount() throws Exception {
PublicKey nft_mint = nftMint();
PublicKey nft_metadata = nft_metadata(nft_mint);
PublicKey nft_master_edition = nft_master_edition(nft_mint);
PublicKey associated_token = associatedToken(payer, nft_mint);
// 1. 构建所需的账户列表 (Meta, CandyMachine, Mint, Collection, ThirdPartySigner, etc.)
List ac = new ArrayList<>();
ac.add(new AccountMeta(new PublicKey("6uMXvQgiZjuk9q5z89dFuLFSJucrkqMwRef2ybPzshac"), false, true));//1 Candy Machine
ac.add(new AccountMeta(new PublicKey("9RNrXs4Uin3Cf2TiLb5DFmb3owsHpKMxsv5yZMBSF2w"), false, true));//2 Authority Pda
ac.add(new AccountMeta(new PublicKey("EM8kLQLvJonx6JDytaokcEFG7W7owGwD3f4tL5DGfEii"), true, false));//3 Mint Authority
ac.add(new AccountMeta(payer, true, true));//4 payer
ac.add(new AccountMeta(destination, false, false));//5 nft Owner
ac.add(new AccountMeta(nft_mint, true, true));//6 nft_mint
ac.add(new AccountMeta(payer, true, false));//7 nft_mint_authority
ac.add(new AccountMeta(nft_metadata, false, true));//8 nft_metadata
ac.add(new AccountMeta(nft_master_edition, false, true));//9 nft_master_edition
ac.add(new AccountMeta(associated_token, false, true));//10 token (optional)
ac.add(new AccountMeta(new PublicKey("CndyV3LdqHUfDLmE5naZjVN8rBZz4tqhdefbAnjHG3JR"), false, false));//11 token_record (optional)
ac.add(new AccountMeta(new PublicKey("HkhHa8Ms24LwUUN1iMXQ9Csg5ytSPUray8wvByfN7qop"), false, false));//12 collection_delegate_record
ac.add(new AccountMeta(new PublicKey("4inmHPKPxyY1gutvcxbKrcueNuU6gZFqvsSou1q7kTuk"), false, false));//13 collection_mint
ac.add(new AccountMeta(new PublicKey("2d5kBbejKbTtPHL73dumhrmg3r2pepiwgc3p5ht45Q7o"), false, true));// 14 collection_metadata
ac.add(new AccountMeta(new PublicKey("EMg3BQ33obSXabxEgPtjB4KvTGR6hy6h7X2C3EU2kwhd"), false, false));//15 collection_master_edition
ac.add(new AccountMeta(new PublicKey("EM8kLQLvJonx6JDytaokcEFG7W7owGwD3f4tL5DGfEii"), false, false));//16 collection_update_authority
ac.add(new AccountMeta(new PublicKey("metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s"), false, false));//17 token_metadata_program
ac.add(new AccountMeta(new PublicKey("TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA"), false, false));//18 spl_token_program
ac.add(new AccountMeta(new PublicKey("ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL"), false, false));//19 spl_ata_program (optional)
ac.add(new AccountMeta(new PublicKey("11111111111111111111111111111111"), false, false));//20 system_program
ac.add(new AccountMeta(new PublicKey("Sysvar1nstructions1111111111111111111111111"), false, false));//21 sysvar_instructions
ac.add(new AccountMeta(new PublicKey("SysvarS1otHashes111111111111111111111111111"), false, false));//22 recent_slothashes
ac.add(new AccountMeta(new PublicKey("CndyV3LdqHUfDLmE5naZjVN8rBZz4tqhdefbAnjHG3JR"), false, false));//23 authorization_rules_program (optional)
ac.add(new AccountMeta(new PublicKey("CndyV3LdqHUfDLmE5naZjVN8rBZz4tqhdefbAnjHG3JR"), false, false));//24 authorization_rules (optional)
return ac;
}

public static byte[] getTransData() throws Exception {
ByteBuffer buffer = ByteBuffer.allocate(8); // 8
buffer.order(ByteOrder.LITTLE_ENDIAN);
buffer.put((byte)120);
buffer.put((byte)121);
buffer.put((byte)23);
buffer.put((byte)146);
buffer.put((byte)173);
buffer.put((byte)110);
buffer.put((byte)199);
buffer.put((byte)205);
return buffer.array();
}

public static PublicKey nftMint() throws RpcException {
    Account newAccount = new Account();
    nftMint = newAccount;
    log.info("new mint account: " + newAccount.getPublicKey().toBase58());
    return newAccount.getPublicKey();
}