diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..1f209e0
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module github.com/gregorybednov/lbc_sdk
+
+go 1.24.2
diff --git a/types.go b/types.go
new file mode 100644
index 0000000..a97d3c4
--- /dev/null
+++ b/types.go
@@ -0,0 +1,43 @@
+package types
+
+// Types module
+// Can be used for an import
+// TODO someday it could be migrated onto generated types
+
+
+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,omitempty"` // ← чтобы понимать клиент
+	Title       string `json:"title,omitempty"`     // ← опционально, если когда-нибудь пригодится
+	Deadline    string `json:"deadline,omitempty"`
+}
+
+type CommitmentTxBody struct {
+	Type        string `json:"type"`
+	ID          string `json:"id"`
+	PromiseID   string `json:"promise_id"`
+	CommiterID  string `json:"commiter_id"`
+	CommiterSig string `json:"commiter_sig,omitempty"`
+}
+
+type CompoundTx struct {
+	Body struct {
+		Promise    *PromiseTxBody    `json:"promise"`
+		Commitment *CommitmentTxBody `json:"commitment"`
+	} `json:"body"`
+	Signature string `json:"signature"`
+}
+
+type SignedTx struct {
+	Body      any    `json:"body"` // TODO someday it should become less abstract
+	Signature string `json:"signature"`
+}