Sending transaction in TON blockchain(Golang)

package main

import (
    "context"
    "encoding/base64"
    "errors"
    "log"
    "strings"

    "github.com/xssnick/tonutils-go/address"
    "github.com/xssnick/tonutils-go/liteclient"
    "github.com/xssnick/tonutils-go/tlb"
    "github.com/xssnick/tonutils-go/ton"
    "github.com/xssnick/tonutils-go/ton/wallet"
    tonwallet "github.com/xssnick/tonutils-go/ton/wallet"
)

func main() {
    // initialize connection pool.
    testnetConfigURL := "https://ton-blockchain.github.io/testnet-global.config.json"
    conn := liteclient.NewConnectionPool()
    ctx := context.Background()
    err := conn.AddConnectionsFromConfigUrl(ctx, testnetConfigURL)
    if err != nil {
        panic(err)
    }

    // initialize api client.
    api := ton.NewAPIClient(conn)

    // // importing wallet.
    seedStr := "<WALLET_SEED>" // if you don't have one you can generate it with tonwallet.NewSeed().
    seed := strings.Split(seedStr, " ")

    wallet, err := tonwallet.FromSeed(api, seed, wallet.V4R2)
    if err != nil {
        panic(err)
    }

    log.Println("WALLET ADDRESS: ", wallet.Address().String())

    // preparing for transaction...

}

     // previous part
    // preparing for transaction...

    // getting latest master chain.
    block, err := api.CurrentMasterchainInfo(ctx)
    if err != nil {
        panic(err)
    }

    // amount of transaction to be made.
    var (
        amount        uint64 = 1e9                                                // 1e9 Nano TONs = 1TON.
        walletAddress string = "EQC9n6aFb2oxQPMTPrHOnZDFcvvC2YLYIgBUms2yAB_LcAtv" // wallet address to which we are goin to make the transaction.
        comment       string = "Payment"
    )

    balance, err := wallet.GetBalance(ctx, block)
    if err != nil {
        panic(err)
    }

    log.Println("AVAILABLE BALANCE", balance)

    // check if we have enough balance.
    if balance.NanoTON().Uint64() < amount {
        panic(errors.New("insufficient balance"))
    }

    // parse address, in case we receive an invalid address.
    addr, err := address.ParseAddr(walletAddress)
    if err != nil {
        panic(err)
    }

    // Now we can use the method Transfer that the library provides.
    // Which absolutely fine, the problem is that we WANT to retrieve the hash of the transaction.
    // Currently the Transfer method doesn't not return the hash of the transaction, because it gives you
    // the option to not wait for the transaction to finish. This is my assumption of course.
    // So let's try to wait for the transaction and to retrieve the hash of the transaction.
    // For that purpose the library provides us with a method called SendManyWaitTxHash.

    // creating cell for comment.
    body, err := tonwallet.CreateCommentCell(comment)
    if err != nil {
        panic(err)
    }

    txn, err := wallet.SendManyWaitTxHash(ctx, []*tonwallet.Message{
        {
            Mode: 1,
            InternalMessage: &tlb.InternalMessage{
                IHRDisabled: true,
                Bounce:      false, // we don't want the transaction to bounce, but you can change it to true if you want.
                DstAddr:     addr,  // destination address.
                Amount:      tlb.FromNanoTONU(amount),
                Body:        body,
            },
        },
    })
    if err != nil {
        panic(err)
    }

    // now we can use this transaction hash to search
    // the transaction in tonscan explorer.
    txnHash := base64.StdEncoding.EncodeToString(txn)
    log.Println("TXN HASH: ", txnHash)

package main

import (
    "context"
    "encoding/base64"
    "errors"
    "log"
    "strings"

    "github.com/xssnick/tonutils-go/address"
    "github.com/xssnick/tonutils-go/liteclient"
    "github.com/xssnick/tonutils-go/tlb"
    "github.com/xssnick/tonutils-go/ton"
    "github.com/xssnick/tonutils-go/ton/wallet"
    tonwallet "github.com/xssnick/tonutils-go/ton/wallet"
)

func main() {
    // initialize connection pool.
    testnetConfigURL := "https://ton-blockchain.github.io/testnet-global.config.json"
    conn := liteclient.NewConnectionPool()
    ctx := context.Background()
    err := conn.AddConnectionsFromConfigUrl(ctx, testnetConfigURL)
    if err != nil {
        panic(err)
    }

    // initialize api client.
    api := ton.NewAPIClient(conn)

    // // importing wallet.
    seedStr := "<WALLET_SEED>" // if you don't have one you can generate it with tonwallet.NewSeed().
    seed := strings.Split(seedStr, " ")

    wallet, err := tonwallet.FromSeed(api, seed, wallet.V4R2)
    if err != nil {
        panic(err)
    }

    log.Println("WALLET ADDRESS: ", wallet.Address().String())

    // getting latest master chain.
    block, err := api.CurrentMasterchainInfo(ctx)
    if err != nil {
        panic(err)
    }

    // amount of transaction to be made.
    var (
        amount        uint64 = 1e9                                                // 1e9 Nano TONs = 1TON.
        walletAddress string = "EQC9n6aFb2oxQPMTPrHOnZDFcvvC2YLYIgBUms2yAB_LcAtv" // wallet address to which we are goin to make the transaction.
        comment       string = "Payment"
    )

    balance, err := wallet.GetBalance(ctx, block)
    if err != nil {
        panic(err)
    }

    log.Println("AVAILABLE BALANCE", balance)

    // check if we have enough balance.
    if balance.NanoTON().Uint64() < amount {
        panic(errors.New("insufficient balance"))
    }

    // parse address, in case we receive an invalid address.
    addr, err := address.ParseAddr(walletAddress)
    if err != nil {
        panic(err)
    }

    // Now we can use the method Transfer that the library provides.
    // Which absolutely fine, the problem is that we WANT to retrieve the hash of the transaction.
    // Currently the Transfer method doesn't not return the hash of the transaction, because it gives you
    // the option to not wait for the transaction to finish. This is my assumption of course.
    // So let's try to wait for the transaction and to retrieve the hash of the transaction.
    // For that purpose the library provides us with a method called SendManyWaitTxHash.

    // creating cell for comment.
    body, err := tonwallet.CreateCommentCell(comment)
    if err != nil {
        panic(err)
    }

    txn, err := wallet.SendManyWaitTxHash(ctx, []*tonwallet.Message{
        {
            Mode: 1,
            InternalMessage: &tlb.InternalMessage{
                IHRDisabled: true,
                Bounce:      false, // we don't want the transaction to bounce, but you can change it to true if you want.
                DstAddr:     addr,  // destination address.
                Amount:      tlb.FromNanoTONU(amount),
                Body:        body,
            },
        },
    })
    if err != nil {
        panic(err)
    }

    // now we can use this transaction hash to search
    // the transaction in tonscan explorer.
    txnHash := base64.StdEncoding.EncodeToString(txn)
    log.Println("TXN HASH: ", txnHash)
}