add constructor for create contract invoke message

auth.go

@@ -232,6 +232,39 @@ func CreateAuthorizationRequestWithMessage(reason, message, sender,
 	return request
 }
 
+// CreateContractInvokeRequest creates new contract invoke request message
+// reason - describes purpose of request
+// sender - sender identifier
+// transactionData - data for on chain verification
+// zkRequests - zero knowledge proof request(s)
+func CreateContractInvokeRequest(
+	reason, sender string,
+	transactionData protocol.TransactionData,
+	zkRequests ...protocol.ZeroKnowledgeProofRequest,
+) protocol.ContractInvokeRequestMessage {
+	return CreateContractInvokeRequestWithMessage(reason, "", sender, transactionData, zkRequests...)
+}
+
+// CreateContractInvokeRequestWithMessage creates new contract invoke request message with message
+func CreateContractInvokeRequestWithMessage(
+	reason, message, sender string,
+	transactionData protocol.TransactionData,
+	zkRequests ...protocol.ZeroKnowledgeProofRequest,
+) protocol.ContractInvokeRequestMessage {
+	return protocol.ContractInvokeRequestMessage{
+		Typ:  packers.MediaTypePlainMessage,
+		Type: protocol.AuthorizationRequestMessageType,
+		ID:   uuid.New().String(),
+		From: sender,
+		Body: protocol.ContractInvokeRequestMessageBody{
+			Reason:          reason,
+			Message:         message,
+			TransactionData: transactionData,
+			Scope:           zkRequests,
+		},
+	}
+}
+
 // VerifyAuthResponse performs verification of auth response based on auth request
 func (v *Verifier) VerifyAuthResponse(
 	ctx context.Context,