diff --git a/.gitignore b/.gitignore
index 6f72f89..c61a73f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,3 +23,6 @@ go.work.sum
 
 # env file
 .env
+
+lbc_client
+config/
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..c61b1e2
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,8 @@
+module lbc_client
+
+go 1.24.3
+
+require (
+	github.com/google/uuid v1.6.0
+	github.com/spf13/pflag v1.0.7
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..b21c462
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,4 @@
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/spf13/pflag v1.0.7 h1:vN6T9TfwStFPFM5XzjsvmzZkLuaLX+HS+0SeFLRgU6M=
+github.com/spf13/pflag v1.0.7/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..93ecf2a
--- /dev/null
+++ b/main.go
@@ -0,0 +1,261 @@
+package main
+
+import (
+	"bytes"
+	"crypto/ed25519"
+	"crypto/rand"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/spf13/pflag"
+)
+
+type CommiterTxBody struct {
+	Type           string `json:"type"`
+	ID             string `json:"id"`
+	Name           string `json:"name"`
+	CommiterPubKey string `json:"commiter_pubkey"`
+}
+
+type PromiseTxBody struct {
+	Type        string `json:"type"`
+	ID          string `json:"id"`
+	Description string `json:"description"`
+	Timestamp   int64  `json:"timestamp"`
+}
+
+type CommitmentTxBody struct {
+	Type       string `json:"type"`
+	ID         string `json:"id"`
+	PromiseID  string `json:"promise_id"`
+	CommiterID string `json:"commiter_id"`
+}
+
+type SignedTx struct {
+	Body      any    `json:"body"`
+	Signature string `json:"signature"`
+}
+
+type rpcResp struct {
+	JSONRPC string `json:"jsonrpc"`
+	ID      any    `json:"id"`
+	Error   *struct {
+		Code    int    `json:"code"`
+		Message string `json:"message"`
+		Data    string `json:"data"`
+	} `json:"error"`
+	Result *struct {
+		CheckTx struct {
+			Code uint32 `json:"code"`
+			Log  string `json:"log"`
+		} `json:"check_tx"`
+		DeliverTx struct {
+			Code uint32 `json:"code"`
+			Log  string `json:"log"`
+		} `json:"deliver_tx"`
+	} `json:"result"`
+}
+
+type CompoundTx struct {
+	Body struct {
+		Promise    *PromiseTxBody    `json:"promise"`
+		Commitment *CommitmentTxBody `json:"commitment"`
+	} `json:"body"`
+	Signature string `json:"signature"`
+}
+
+const configDir = "./config"
+const privKeyPath = configDir + "/ed25519.key"
+const pubKeyPath = configDir + "/ed25519.pub"
+
+func parseRPCResult(data []byte) error {
+	var r rpcResp
+	_ = json.Unmarshal(data, &r)
+	if r.Error != nil {
+		return fmt.Errorf("RPC error: %d %s (%s)", r.Error.Code, r.Error.Message, r.Error.Data)
+	}
+	if r.Result == nil {
+		return fmt.Errorf("empty result")
+	}
+	if r.Result.CheckTx.Code != 0 {
+		return fmt.Errorf("CheckTx failed: %s", r.Result.CheckTx.Log)
+	}
+	if r.Result.DeliverTx.Code != 0 {
+		return fmt.Errorf("DeliverTx failed: %s", r.Result.DeliverTx.Log)
+	}
+	return nil
+}
+
+func ensureKeypair() (ed25519.PublicKey, ed25519.PrivateKey, error) {
+	if _, err := os.Stat(privKeyPath); os.IsNotExist(err) {
+		fmt.Println("🔐 Generating new ed25519 keypair...")
+		pub, priv, err := ed25519.GenerateKey(rand.Reader)
+		if err != nil {
+			return nil, nil, err
+		}
+		os.MkdirAll(configDir, 0700)
+		os.WriteFile(privKeyPath, priv, 0600)
+		os.WriteFile(pubKeyPath, pub, 0644)
+		return pub, priv, nil
+	}
+	priv, _ := os.ReadFile(privKeyPath)
+	pub, _ := os.ReadFile(pubKeyPath)
+	return ed25519.PublicKey(pub), ed25519.PrivateKey(priv), nil
+}
+
+func sendTx(tx SignedTx, rpcURL string) error {
+	txBytes, _ := json.Marshal(tx)
+	txB64 := base64.StdEncoding.EncodeToString(txBytes)
+	final := map[string]any{
+		"jsonrpc": "2.0",
+		"id":      uuid.NewString(),
+		"method":  "broadcast_tx_commit",
+		"params": map[string]string{
+			"tx": txB64,
+		},
+	}
+	finalBytes, _ := json.Marshal(final)
+	fmt.Println("🚧 Raw tx JSON:", string(txBytes))
+	fmt.Printf("🚧 Final RPC body:\n%s\n", string(finalBytes))
+	resp, err := http.Post(rpcURL, "application/json", bytes.NewReader(finalBytes))
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	data, _ := io.ReadAll(resp.Body)
+	fmt.Println("📡 Response:")
+	fmt.Println(string(data))
+	if err := parseRPCResult(data); err != nil {
+		return err
+	}
+	return nil
+}
+
+func registerCommiter(name, rpcURL string) error {
+	pub, priv, _ := ensureKeypair()
+	pubB64 := base64.StdEncoding.EncodeToString(pub)
+	id := "commiter:" + pubB64
+	body := CommiterTxBody{
+		Type:           "commiter",
+		ID:             id,
+		Name:           name,
+		CommiterPubKey: pubB64, // ← ты думаешь, а на деле может быть иначе
+	}
+	bodyBytes, _ := json.Marshal(body)
+	sig := ed25519.Sign(priv, bodyBytes)
+	tx := SignedTx{Body: body, Signature: base64.StdEncoding.EncodeToString(sig)}
+	return sendTx(tx, rpcURL)
+}
+
+func createPromise(desc, rpcURL string) error {
+	pub, priv, _ := ensureKeypair()
+	pubB64 := base64.StdEncoding.EncodeToString(pub)
+
+	commiterID := "commiter:" + pubB64
+	promiseID := "promise:" + uuid.NewString()
+	commitmentID := "commitment:" + uuid.NewString()
+
+	// Объекты тела
+	promise := &PromiseTxBody{
+		Type:        "promise",
+		ID:          promiseID,
+		Description: desc,
+		Timestamp:   time.Now().Unix(),
+	}
+	commitment := &CommitmentTxBody{
+		Type:       "commitment",
+		ID:         commitmentID,
+		PromiseID:  promiseID,
+		CommiterID: commiterID,
+	}
+
+	// Сборка тела для подписи
+	bodyStruct := struct {
+		Promise    *PromiseTxBody    `json:"promise"`
+		Commitment *CommitmentTxBody `json:"commitment"`
+	}{
+		Promise:    promise,
+		Commitment: commitment,
+	}
+
+	// Сериализация и подпись
+	bodyBytes, err := json.Marshal(bodyStruct)
+	if err != nil {
+		return fmt.Errorf("failed to marshal compound body: %w", err)
+	}
+	sig := ed25519.Sign(priv, bodyBytes)
+	sigB64 := base64.StdEncoding.EncodeToString(sig)
+
+	// Формирование транзакции
+	compound := CompoundTx{
+		Body:      bodyStruct,
+		Signature: sigB64,
+	}
+
+	// Отправка
+	txBytes, err := json.Marshal(compound)
+	if err != nil {
+		return fmt.Errorf("failed to marshal compound tx: %w", err)
+	}
+	txB64 := base64.StdEncoding.EncodeToString(txBytes)
+	final := map[string]any{
+		"jsonrpc": "2.0",
+		"id":      uuid.NewString(),
+		"method":  "broadcast_tx_commit",
+		"params": map[string]string{
+			"tx": txB64,
+		},
+	}
+
+	finalBytes, _ := json.Marshal(final)
+	fmt.Printf("🚧 Final RPC body:\n%s\n", string(finalBytes))
+	resp, err := http.Post(rpcURL, "application/json", bytes.NewReader(finalBytes))
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	data, _ := io.ReadAll(resp.Body)
+	fmt.Println("📡 Response:")
+	fmt.Println(string(data))
+	if err := parseRPCResult(data); err != nil {
+		return err
+	}
+	return nil
+}
+
+func main() {
+	var name, desc, rpc string
+	pflag.StringVar(&name, "name", "", "register commiter name")
+	pflag.StringVar(&desc, "desc", "", "create promise description")
+	pflag.StringVar(&rpc, "rpc", "http://localhost:26657", "Tendermint RPC URL")
+	pflag.Parse()
+
+	if name != "" {
+		err := registerCommiter(name, rpc)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "❌ Error: %v\n", err)
+			os.Exit(1)
+		}
+		fmt.Println("✅ Commiter registered successfully")
+		return
+	}
+
+	if desc != "" {
+		err := createPromise(desc, rpc)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "❌ Error: %v\n", err)
+			os.Exit(1)
+		}
+		fmt.Println("✅ Promise and Commitment created successfully")
+		return
+	}
+
+	fmt.Println("⛔ Please provide either --name or --desc")
+	os.Exit(1)
+}