diff --git a/packages/wasm/src/services/credential/utils.js b/packages/wasm/src/services/credential/utils.js
index 97428a9e..c36c5bff 100644
--- a/packages/wasm/src/services/credential/utils.js
+++ b/packages/wasm/src/services/credential/utils.js
@@ -30,11 +30,9 @@ export async function keyDocToKeypair(keyDoc) {
     privateKeyBase58 || (privateKeyMultibase && privateKeyMultibase.substr(1));
   if (!privateKeyEncoded) {
     throw new Error(
-      `No private key in document found, this should not happen. Got: ${JSON.stringify(
-        keyDoc,
-        null,
-        2,
-      )}`,
+      `No private key in document found, this should not happen. keyDoc id: ${
+        keyDoc.id || '<unknown>'
+      }, type: ${type || '<unknown>'}`,
     );
   }
 
diff --git a/packages/wasm/src/wallet/rpc-storage-interface.js b/packages/wasm/src/wallet/rpc-storage-interface.js
index 60989860..9e55c597 100644
--- a/packages/wasm/src/wallet/rpc-storage-interface.js
+++ b/packages/wasm/src/wallet/rpc-storage-interface.js
@@ -27,13 +27,16 @@ class RpcStorageInterface extends StorageInterface {
         Logger.debug('Wallet: no storage found, creating empty wallet');
         this.documents = {};
       } else {
-        Logger.debug(`Wallet: existing storage found: ${JSON.stringify(data)}`);
+        Logger.debug(
+          `Wallet: existing storage found with ${
+            Object.keys(this.documents).length
+          } documents`,
+        );
       }
     } catch (err) {
       Logger.error(
         `error to retrieve data from rpc storage: ${err.toString()}`,
       );
-      Logger.info(JSON.stringify(data));
       this.documents = {};
 
       throw err;
@@ -80,12 +83,14 @@ class RpcStorageInterface extends StorageInterface {
   }
 
   async find({has = undefined, equals = undefined} = {}) {
+    const documentIds = Object.keys(this.documents || {});
+
     Logger.debug('Execute find', {
       equals,
-      documents: this.documents,
+      documentCount: documentIds.length,
     });
 
-    const documents = Object.keys(this.documents || {})
+    const documents = documentIds
       .map(docId => {
         const content = this.documents[docId];