docs: Update transaction building using v2

docs/learn/advanced/01-transactions.md

@@ -207,3 +207,193 @@ An example can be seen [here](https://docs.cosmos.network/main/user/run-node/txs
 #### CometBFT RPC
 
 The three methods presented above are actually higher abstractions over the CometBFT RPC `/broadcast_tx_{async,sync,commit}` endpoints, documented [here](https://docs.cometbft.com/v1.0/explanation/core/rpc). This means that you can use the CometBFT RPC endpoints directly to broadcast the transaction, if you wish so.
+
+
+#### Complete Example Building and Broadcasting a Transaction using clientv2
+
+1. Correctly set up imports
+
+```go
+import (
+	"context"
+	"fmt"
+	"log"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+
+	apisigning "cosmossdk.io/api/cosmos/tx/signing/v1beta1"
+	"cosmossdk.io/client/v2/broadcast/comet"
+	"cosmossdk.io/client/v2/tx"
+	"cosmossdk.io/core/transaction"
+	"cosmossdk.io/math"
+	banktypes "cosmossdk.io/x/bank/types"
+	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
+	cryptocodec "github.com/cosmos/cosmos-sdk/crypto/codec"
+	"github.com/cosmos/cosmos-sdk/crypto/keyring"
+	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
+
+	"github.com/cosmos/cosmos-sdk/codec"
+	addrcodec "github.com/cosmos/cosmos-sdk/codec/address"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+```
+
+2. Create a gRPC connection
+
+```go
+clientConn, err := grpc.NewClient("127.0.0.1:9090", grpc.WithTransportCredentials(insecure.NewCredentials()))
+if err != nil {
+	log.Fatal(err)
+}
+```
+
+3. Setup codec and interface registry
+
+```go
+	// Setup interface registry and register necessary interfaces
+	interfaceRegistry := codectypes.NewInterfaceRegistry()
+	banktypes.RegisterInterfaces(interfaceRegistry)
+	authtypes.RegisterInterfaces(interfaceRegistry)
+	cryptocodec.RegisterInterfaces(interfaceRegistry)
+
+	// Create a ProtoCodec for encoding/decoding
+	protoCodec := codec.NewProtoCodec(interfaceRegistry)
+
+```
+
+4. Initialize keyring
+
+```go
+
+	ckr, err := keyring.New("autoclikeyring", "test", home, nil, protoCodec)
+	if err != nil {
+		log.Fatal("error creating keyring", err)
+	}
+	kr, err := keyring.NewAutoCLIKeyring(ckr, addrcodec.NewBech32Codec("cosmos"))
+	if err != nil {
+		log.Fatal("error creating auto cli keyring", err)
+	}
+
+
+```
+
+5. Setup transaction parameters
+
+```go
+
+	// Setup transaction parameters
+	txParams := tx.TxParameters{
+		ChainID:  "simapp-v2-chain",
+		SignMode: apisigning.SignMode_SIGN_MODE_DIRECT,
+		AccountConfig: tx.AccountConfig{
+			FromAddress: "cosmos1t0fmn0lyp2v99ga55mm37mpnqrlnc4xcs2hhhy",
+			FromName:    "alice",
+		},
+	}
+
+	// Configure gas settings
+	gasConfig, err := tx.NewGasConfig(100, 100, "0stake")
+	if err != nil {
+		log.Fatal("error creating gas config: ", err)
+	}
+	txParams.GasConfig = gasConfig
+
+	// Create auth query client
+	authClient := authtypes.NewQueryClient(clientConn)
+
+	// Retrieve account information for the sender
+	fromAccount, err := getAccount("cosmos1t0fmn0lyp2v99ga55mm37mpnqrlnc4xcs2hhhy", authClient, protoCodec)
+	if err != nil {
+		log.Fatal("error getting from account: ", err)
+	}
+
+	// Update txParams with the correct account number and sequence
+	txParams.AccountConfig.AccountNumber = fromAccount.GetAccountNumber()
+	txParams.AccountConfig.Sequence = fromAccount.GetSequence()
+
+	// Retrieve account information for the recipient
+	toAccount, err := getAccount("cosmos1e2wanzh89mlwct7cs7eumxf7mrh5m3ykpsh66m", authClient, protoCodec)
+	if err != nil {
+		log.Fatal("error getting to account: ", err)
+	}
+
+	// Configure transaction settings
+	txConf, _ := tx.NewTxConfig(tx.ConfigOptions{
+		AddressCodec:          addrcodec.NewBech32Codec("cosmos"),
+		Cdc:                   protoCodec,
+		ValidatorAddressCodec: addrcodec.NewBech32Codec("cosmosval"),
+		EnabledSignModes:      []apisigning.SignMode{apisigning.SignMode_SIGN_MODE_DIRECT},
+	})
+```
+
+6. Build the transaction
+
+```go
+// Create a transaction factory
+	f, err := tx.NewFactory(kr, codec.NewProtoCodec(codectypes.NewInterfaceRegistry()), nil, txConf, addrcodec.NewBech32Codec("cosmos"), clientConn, txParams)
+	if err != nil {
+		log.Fatal("error creating factory", err)
+	}
+
+	// Define the transaction message
+	msgs := []transaction.Msg{
+		&banktypes.MsgSend{
+			FromAddress: fromAccount.GetAddress().String(),
+			ToAddress:   toAccount.GetAddress().String(),
+			Amount: sdk.Coins{
+				sdk.NewCoin("stake", math.NewInt(1000000)),
+			},
+		},
+	}
+
+	// Build and sign the transaction
+	tx, err := f.BuildsSignedTx(context.Background(), msgs...)
+	if err != nil {
+		log.Fatal("error building signed tx", err)
+	}
+
+
+```
+
+7. Broadcast the transaction
+
+```go
+// Create a broadcaster for the transaction
+	c, err := comet.NewCometBFTBroadcaster("http://127.0.0.1:26675", comet.BroadcastSync, protoCodec)
+	if err != nil {
+		log.Fatal("error creating comet broadcaster", err)
+	}
+
+	// Broadcast the transaction
+	res, err := c.Broadcast(context.Background(), tx.Bytes())
+	if err != nil {
+		log.Fatal("error broadcasting tx", err)
+	}
+
+```
+
+8. Helpers
+
+```go
+// getAccount retrieves account information using the provided address
+func getAccount(address string, authClient authtypes.QueryClient, codec codec.Codec) (sdk.AccountI, error) {
+	// Query account info
+	accountQuery, err := authClient.Account(context.Background(), &authtypes.QueryAccountRequest{
+		Address: string(address),
+	})
+	if err != nil {
+		return nil, fmt.Errorf("error getting account: %w", err)
+	}
+
+	// Unpack the account information
+	var account sdk.AccountI
+	err = codec.InterfaceRegistry().UnpackAny(accountQuery.Account, &account)
+	if err != nil {
+		return nil, fmt.Errorf("error unpacking account: %w", err)
+	}
+
+	return account, nil
+}
+```