how to send the memo tx with the sdk ?

[wade-liwei]

I follow Chido introduction on the discard. he send me the TS codes example:

await transferTransaction.add(
  new TransactionInstruction({
    keys: [{ pubkey: fromKeypair.publicKey, isSigner: true, isWritable: true }],
    data: Buffer.from('Data to send in transaction', 'utf-8'),
    programId: new PublicKey("MemoSq4gqABAXKb96qnH8TysNcWxMyWCqXgDLGmfcHr"),
  })
)

I append the memo Instruction in golang:

    Instructions: []types.Instruction{
        sysprog.Transfer(sysprog.TransferParam{
            From:   alice.PublicKey,                                                            // from
            To:     common.PublicKeyFromString("2xNweLHLqrbx4zo1waDvgWJHgsUpPj8Y8icbAFeR4a8i"), // to
            Amount: 1e9,                                                                        // 1 SOL
        }),
        types.Instruction{
            Accounts: []types.AccountMeta{
                {PubKey: alice.PublicKey, IsSigner: true, IsWritable: true},
            },
            ProgramID: common.SystemProgramID,
            Data:      []byte("111111111"),
        },
    },

submit tx, get the error: failed: invalid instruction data

2022/02/10 11:08:56 failed to send tx, err: rpc response error: {"code":-32002,"message":"Transaction simulation failed: Error processing Instruction 1: invalid instruction data","data":{"accounts":null,"err":{"InstructionError":[1,"InvalidInstructionData"]},"logs":["Program 11111111111111111111111111111111 invoke [1]","Program 11111111111111111111111111111111 success","Program 11111111111111111111111111111111 invoke [1]","Program 11111111111111111111111111111111 failed: invalid instruction data"]}} exit status 1

Please help me. thanks a lot.

[yihau]

for now you can try:

package main

import (
    "context"
    "log"

    "github.com/portto/solana-go-sdk/client"
    "github.com/portto/solana-go-sdk/common"
    "github.com/portto/solana-go-sdk/program/sysprog"
    "github.com/portto/solana-go-sdk/rpc"
    "github.com/portto/solana-go-sdk/types"
)

// you can fill your key here
var feePayer, _ = types.AccountFromBytes([]byte{178, 244, 76, 4, 247, 41, 113, 40, 111, 103, 12, 76, 195, 4, 100, 123, 88, 226, 37, 56, 209, 180, 92, 77, 39, 85, 78, 202, 121, 162, 88, 29, 125, 155, 223, 107, 139, 223, 229, 82, 89, 209, 27, 43, 108, 205, 144, 2, 74, 159, 215, 57, 198, 4, 193, 36, 161, 50, 160, 119, 89, 240, 102, 184})

// you can fill your key here
var alice, _ = types.AccountFromBytes([]byte{196, 114, 86, 165, 59, 177, 63, 87, 43, 10, 176, 101, 225, 42, 129, 158, 167, 43, 81, 214, 254, 28, 196, 158, 159, 64, 55, 123, 48, 211, 78, 166, 127, 96, 107, 250, 152, 133, 208, 224, 73, 251, 113, 151, 128, 139, 86, 80, 101, 70, 138, 50, 141, 153, 218, 110, 56, 39, 122, 181, 120, 55, 86, 185})

func main() {
    c := client.NewClient(rpc.DevnetRPCEndpoint)

    // to fetch recent blockhash
    res, err := c.GetRecentBlockhash(context.Background())
    if err != nil {
        log.Fatalf("get recent block hash error, err: %v\n", err)
    }

    // create a message
    message := types.NewMessage(types.NewMessageParam{
        FeePayer:        feePayer.PublicKey,
        RecentBlockhash: res.Blockhash,
        Instructions: []types.Instruction{
            {
                ProgramID: common.PublicKeyFromString("MemoSq4gqABAXKb96qnH8TysNcWxMyWCqXgDLGmfcHr"),
                Accounts: []types.AccountMeta{
                    {PubKey: alice.PublicKey, IsSigner: true, IsWritable: false},
                },
                Data: []byte("Hello World"),  // you memo here
            },
            sysprog.Transfer(sysprog.TransferParam{
                From:   alice.PublicKey,
                To:     common.PublicKeyFromString("2xNweLHLqrbx4zo1waDvgWJHgsUpPj8Y8icbAFeR4a8i"),
                Amount: 1e8,
            }),
        },
    })

    // create tx by message + signer
    tx, err := types.NewTransaction(types.NewTransactionParam{
        Message: message,
        Signers: []types.Account{feePayer, alice},
    })
    if err != nil {
        log.Fatalf("failed to new transaction, err: %v", err)
    }

    // send tx
    txhash, err := c.SendTransaction(context.Background(), tx)
    if err != nil {
        log.Fatalf("failed to send tx, err: %v", err)
    }

    log.Println("txhash:", txhash)
}

example tx here: https://explorer.solana.com/tx/4kDgg6AghQ7j1uT3RjduWMayN7GhCTmKmvMzrMGcncRYVgVM1UnUF8cpJssGHfZbY9LoRPwjEdmmMFdJChGowAjA?cluster=devnet

I will add memo program's instruction to this sdk in next few days.

[wade-liwei]

got it. thank you so much.

[wade-liwei]

@yihau I tried []byte type as data, get error: Invalid UTF-8 must use UTF-8 encode ? How to use not-UTF-8 encode type ?

[yihau]

I think it should be a UTF-8 string to this program.

here is the doc https://spl.solana.com/memo The Memo program is a simple program that validates a string of UTF-8 encoded characters and verifies that any accounts provided are signers of the transaction.

[wade-liwei]

thank you again.

[yihau]

there is an example for how to build a memo via this SDK.

thank you!