Metaplex create nft fails on testnet

[NiketYende1]

Hi, I am trying to create an nft with @metaplex-foundation/js. It works fine on the devnet, however does not work on the testnet.

Code snippet:

async function main() {
    // create a new connection to the cluster's API
    const connection = new Connection(clusterApiUrl('testnet'), 'confirmed');

    // initialize a keypair for the user
    const user = await initializeKeypair(connection);

    console.log("PublicKey:", user.publicKey.toBase58());

    const metaplex = Metaplex.make(connection)
    .use(keypairIdentity(user))
    .use(nftStorage({ token: process.env.NFT_STORAGE_TOKEN }));

    // upload NFT data and get the URI for the metadata
    // Till this point everything is fine on testnet
    const uri = await uploadMetadata(metaplex, carNftData);

    // create an NFT using the helper function and the URI from the metadata
    const nft = await metaplex.nfts().create(
        {
            uri: uri,
            name: carNftData.name,
            sellerFeeBasisPoints: carNftData.sellerFeeBasisPoints,
            symbol: carNftData.symbol,
        },
        { commitment: "finalized" },
    );
    console.log(`NFT mintAddress: ${nft.mintAddress}`);
    console.log(`NFT metadataAddress: ${nft.metadataAddress}`);
    console.log(`NFT masterEditionAddress: ${nft.masterEditionAddress}`);
    console.log(`NFT tokenAddress: ${nft.tokenAddress}`);
    console.log(`NFT response blockhash: ${nft.response.blockhash}`);
    console.log(`NFT response signature: ${nft.response.signature}`);    
    console.log(`Token Mint: https://explorer.solana.com/address/${nft.mintAddress}?cluster=testnet`);
}

Error:

cause: SendTransactionError: failed to send transaction: Transaction simulation failed: Error processing Instruction 0: Failed to serialize or deserialize account data: Unknown
      at Connection.sendEncodedTransaction (/home/solana/solana-workspace/solana-airdrop/node_modules/@solana/web3.js/lib/index.cjs.js:8026:13)
      at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
      at async Connection.sendRawTransaction (/home/solana/solana-workspace/solana-airdrop/node_modules/@solana/web3.js/lib/index.cjs.js:7992:20)
      at async RpcClient.sendTransaction (/home/solana/solana-workspace/solana-airdrop/node_modules/@metaplex-foundation/js/dist/cjs/plugins/rpcModule/RpcClient.cjs:69:14)
      at async RpcClient.sendAndConfirmTransaction (/home/solana/solana-workspace/solana-airdrop/node_modules/@metaplex-foundation/js/dist/cjs/plugins/rpcModule/RpcClient.cjs:96:23)
      at async TransactionBuilder.sendAndConfirm (/home/solana/solana-workspace/solana-airdrop/node_modules/@metaplex-foundation/js/dist/cjs/utils/TransactionBuilder.cjs:115:22)
      at async Object.handle (/home/solana/solana-workspace/solana-airdrop/node_modules/@metaplex-foundation/js/dist/cjs/plugins/nftModule/operations/createNft.cjs:71:20)
      at async Disposable.run (/home/solana/solana-workspace/solana-airdrop/node_modules/@metaplex-foundation/js/dist/cjs/utils/Disposable.cjs:26:14)
      at async main (/home/solana/solana-workspace/solana-airdrop/createNFT.js:67:17) {
    logs: [
      'Program metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s invoke [1]',
      'Program log: Error: BorshIoError',
      'Program metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s consumed 3504 of 400000 compute units',
      'Program metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s failed: Failed to serialize or deserialize account data: Unknown'
    ]
  },
  program: {
    name: 'TokenMetadataProgram',
    address: PublicKey [PublicKey(metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s)] {
      _bn: <BN: b7065b1e3d17c45389d527f6b04c3cd58b86c731aa0fdb549b6d1bc03f82946>
    },
    errorResolver: [Function: errorResolver]
  },
  logs: [
    'Program metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s invoke [1]',
    'Program log: Error: BorshIoError',
    'Program metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s consumed 3504 of 400000 compute units',
    'Program metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s failed: Failed to serialize or deserialize account data: Unknown'
  ]

Versions:
node.js: v18.17.1
@metaplex-foundation/js: 0.20.1
@metaplex-foundation/js-plugin-nft-storage: 0.20.0
@solana/spl-token: 0.3.11
@solana/web3.js: 1.89.1

Is this feature supported on testnet? Is there any issue with this?

[davidespataro]

Facing similar issues on testnet as well.

[NiketYende1]

Hi @davidespataro, looks like metaplex features are not loaded on testnet. So, we can only use devnet or mainnet-beta for testing our development features. As per solana developers, testnet is used for validator testing only.

You can refer these tickets:
#345
mpl-token-metadata#91

Even in other libraries, this issue of serialize or deserialize exists. Better use devnet for testing this.

[kkHAIKE]

We really need the testnet network for testing because the official devnet does not have the getSignaturesForAddress feature.😢