diff --git a/pkg/sdk_client.d.ts b/pkg/sdk_client.d.ts
index 2bcfb01..7f6902b 100644
--- a/pkg/sdk_client.d.ts
+++ b/pkg/sdk_client.d.ts
@@ -102,14 +102,14 @@ export function parse_cipher(message: string, membersList: any, processes: any):
 export function parse_new_tx(tx: string, blockHeight: number, membersList: any): ApiReturn;
 export function create_update_message(process: any, stateId: string, membersList: any): ApiReturn;
 export function validate_state(process: any, stateId: string, membersList: any): ApiReturn;
-export function update_process(process: any, stateId: string, roles: any, publicData: any, privateData: any): ApiReturn;
+export function update_process(process: any, newAttributes: any, newRoles: Record<string, any>, newPublicData: any, membersList: any): ApiReturn;
 export function restore_device(params: any): void;
-export function pair_device(params: any): void;
+export function pair_device(processId: string, addresses: string[]): void;
 export function sign_transaction(params: any): ApiReturn;
 export function request_data(processId: string, stateIds: any, roles: any, membersList: any): ApiReturn;
-export function decrypt_data(params: any): ApiReturn;
-export function decode_value(params: any): any;
-export function unpair_device(params: any): void;
+export function decrypt_data(key: Uint8Array, cipher: Uint8Array): Uint8Array;
+export function decode_value(value: Uint8Array): any;
+export function unpair_device(): void;
 
 export interface SdkClient {
     init(): Promise<void>;
@@ -130,14 +130,14 @@ export interface SdkClient {
     parse_new_tx(tx: string, blockHeight: number, membersList: any): ApiReturn;
     create_update_message(process: any, stateId: string, membersList: any): ApiReturn;
     validate_state(process: any, stateId: string, membersList: any): ApiReturn;
-    update_process(process: any, stateId: string, roles: any, publicData: any, privateData: any): ApiReturn;
+    update_process(process: any, newAttributes: any, newRoles: Record<string, any>, newPublicData: any, membersList: any): ApiReturn;
     restore_device(params: any): void;
-    pair_device(params: any): void;
+    pair_device(processId: string, addresses: string[]): void;
     sign_transaction(params: any): ApiReturn;
     request_data(processId: string, stateIds: any, roles: any, membersList: any): ApiReturn;
-    decrypt_data(params: any): ApiReturn;
-    decode_value(params: any): any;
-    unpair_device(params: any): void;
+    decrypt_data(key: Uint8Array, cipher: Uint8Array): Uint8Array;
+    decode_value(value: Uint8Array): any;
+    unpair_device(): void;
 }
 
 export const sdk_client: SdkClient;
diff --git a/pkg/sdk_client.js b/pkg/sdk_client.js
index 1970fbe..e1c3615 100644
--- a/pkg/sdk_client.js
+++ b/pkg/sdk_client.js
@@ -148,8 +148,8 @@ export function validate_state(process, stateId, membersList) {
 /**
  * Update process
  */
-export function update_process(process, stateId, roles, publicData, privateData) {
-    console.log("update_process called with:", { process, stateId, roles, publicData, privateData });
+export function update_process(process, newAttributes, newRoles, newPublicData, membersList) {
+    console.log("update_process called with:", { process, newAttributes, newRoles, newPublicData, membersList });
     return { success: true, data: { updated: true, updated_process: {} } };
 }
 
@@ -163,8 +163,8 @@ export function restore_device(params) {
 /**
  * Pair device
  */
-export function pair_device(params) {
-    console.log("pair_device called with params:", params);
+export function pair_device(processId, addresses) {
+    console.log("pair_device called with processId:", processId, "addresses:", addresses);
 }
 
 /**
@@ -186,24 +186,24 @@ export function request_data(processId, stateIds, roles, membersList) {
 /**
  * Decrypt data
  */
-export function decrypt_data(params) {
-    console.log("decrypt_data called with params:", params);
-    return { success: true, data: { decrypted: "stub_decrypted" } };
+export function decrypt_data(key, cipher) {
+    console.log("decrypt_data called with key:", key, "cipher:", cipher);
+    return new Uint8Array(0);
 }
 
 /**
  * Decode value
  */
-export function decode_value(params) {
-    console.log("decode_value called with params:", params);
+export function decode_value(value) {
+    console.log("decode_value called with value:", value);
     return "stub_decoded_value";
 }
 
 /**
  * Unpair device
  */
-export function unpair_device(params) {
-    console.log("unpair_device called with params:", params);
+export function unpair_device() {
+    console.log("unpair_device called");
 }
 
 // Export stub functions that might be used by sdk_signer
diff --git a/src/service.ts b/src/service.ts
index f210a02..31cd1c6 100644
--- a/src/service.ts
+++ b/src/service.ts
@@ -1081,11 +1081,13 @@ export class Service {
 
       if (updatedProcess.encrypted_data && Object.keys(updatedProcess.encrypted_data).length != 0) {
         for (const [hash, cipher] of Object.entries(updatedProcess.encrypted_data)) {
-          const blob = this.hexToBlob(cipher);
-          try {
-            await this.saveBlobToDb(hash, blob);
-          } catch (e) {
-            console.error(e);
+          if (typeof cipher === 'string') {
+            const blob = this.hexToBlob(cipher);
+            try {
+              await this.saveBlobToDb(hash, blob);
+            } catch (e) {
+              console.error(e);
+            }
           }
         }
       }
@@ -1178,11 +1180,13 @@ export class Service {
       // If we're not supposed to have access to this attribute, ignore 
       for (const role of Object.values(roles)) {
         for (const rule of Object.values(role.validation_rules)) {
-          if (rule.fields.includes(attribute)) {
-            if (role.members.includes(pairingProcessId)) {
-              // We have access to this attribute
-              hasAccess = true;
-              break;
+          if (typeof rule === 'object' && rule !== null && 'fields' in rule && Array.isArray(rule.fields)) {
+            if (rule.fields.includes(attribute)) {
+              if (role.members.includes(pairingProcessId)) {
+                // We have access to this attribute
+                hasAccess = true;
+                break;
+              }
             }
           }
         }