How to send custom instructions via instruction data

[sh4hri4roo]

Hello,
how can I send custom instructions via instruction data to my Solana program? Is there any example or step by step guide?

[hoakbuilds]

The same way you would interact with any other program. We have a lot of implemented programs, you will need to implement methods like the ones seen here and add those TransactionInstruction to the TransactionBuilder.

If you're using anchor for your program, you can use Solnet.Anchor to generate a client to fetch the accounts and create the instructions + submit them.

[sh4hri4roo]

Thank you for fast response.
Actually I've done it once with ts and below is my workflow:

const lamports = 1_000_000_000;
const data = Buffer.from(Uint8Array.of(1, ...new BN(lamports).toArray("le", 8)));
const initMintIx = new web3.TransactionInstruction({
keys: [{...}],
programId,
data
});
await connection.sendTransaction(tx, [signer, initial], { skipPreflight: false, preflightCommitment: "confirmed" });

and it is working perfectly fine but with solnet I get custom error. I think it is because of something wrong I'm doing with data!
Second, I didn't find any samples on how to define data layout for my account like this:

const uint64 = (property = "uint64") => { return BufferLayout.blob(8, property); };
const publicKey = (property = "publicKey") => { return BufferLayout.blob(32, property); };
const MINT_ACCOUNT_DATA_LAYOUT = BufferLayout.struct([BufferLayout.u8("isInitialized") as any, publicKey("minter"),uint64("next_num")]};

and then span it in the createAccount method.

[hoakbuilds]

We do not have a similar way to define the data layout, we have always hard coded the size of an account and then implmented methods to decode the data which use layouts like these.

[sh4hri4roo]

Thanks a lot for the time and fast responses..