InitializeMint fails with 'invalid account data for instruction'

Question

I am trying to use the "createInitializeMintInstruction()" using JS to create a token. The problem is when executing, it throws an error. Concretely this one:

Transaction simulation failed: Error processing Instruction 1: invalid account data for instruction

  logs: [
    'Program 11111111111111111111111111111111 invoke [1]',
    'Program 11111111111111111111111111111111 success',
    'Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [1]',
    'Program log: Instruction: InitializeMint',
    'Program log: Error: InvalidAccountData',
    'Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 1547 of 399850 compute units',
    'Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA failed: invalid account data for instruction'
  ]
}

The function createInitializeMintInstruction() asks for the following parameters:

@parameter mint, @parameter decimals, @parameter mintAuthority, @parameter freezeAuthority (optional) and the token program @parameter programId.

Before calling the createInitializeMintInstruction(), I create an account that will be the mint for the token using the following instruction: SystemProgram.createAccount() (using the TOKEN_PROGRAM_ID as well when creating the account).

The account is created succesfully and I pass the parameters correctly to the initializeMint instruction. I don't see why the invalid account data.

By the way, I'm using TOKEN_PROGRAM_ID from @solana/spl-token

Any help is appreciated, thank you.

Answer 1

Here's how I'm creating spl token with Token Program, which works for me.

const { connection } = useConnection();
const { publicKey, sendTransaction } = useWallet();
const lamports = await getMinimumBalanceForRentExemptMint(connection);
const mintKeypair = Keypair.generate();

const createNewTokenTransaction = new Transaction().add(
  SystemProgram.createAccount({
    fromPubkey: publicKey,
    newAccountPubkey: mintKeypair.publicKey,
    space: MINT_SIZE,
    lamports: lamports,
    programId: TOKEN_PROGRAM_ID,
  }),
  createInitializeMintInstruction(
    mintKeypair.publicKey,
    tokenDecimals,
    publicKey,
    publicKey,
    TOKEN_PROGRAM_ID),
);
await sendTransaction(createNewTokenTransaction, connection, { signers: [mintKeypair] });

Answer 2

It finally worked.

I checked several times but I didn't notice that the initializeMintInstruction was asking for a publickey, and I was actually passing a full keypair by mistake.

Thanks for the code though!!