feat(sdk): add username search example in evo-sdk

packages/wasm-sdk/index.html

@@ -1591,6 +1591,14 @@ <h2>Results</h2>
             inputs: [
               { name: "name", type: "text", label: "DPNS Name", required: true, placeholder: "Enter name (e.g., alice or alice.dash)" }
             ]
+          },
+          dpnsSearch: {
+            label: "DPNS Search Name",
+            description: "Search for DPNS names that start with a given prefix",
+            inputs: [
+              { name: "prefix", type: "text", label: "Name Prefix", required: true, placeholder: "Enter prefix (e.g., ali)" },
+              { name: "limit", type: "number", label: "Limit", required: false, placeholder: "Default: 10" }
+            ]
           }
         }
       },
@@ -3473,6 +3481,60 @@ <h2>Results</h2>
             identityId: resolvedIdentityId,
             message: resolvedIdentityId ? `Resolved to identity: ${resolvedIdentityId}` : `Name "${values.name}" not found`
           };
+        } else if (queryType === 'dpnsSearch') {
+          // Handle DPNS name search with starts-with query
+          const limit = values.limit || 10;
+
+          // DPNS contract ID on testnet
+          const DPNS_CONTRACT_ID = "GWRSAVFMjXx8HpQFaNJMqBV7MBgMK4br5UESsB4S31Ec";
+          const DPNS_DOCUMENT_TYPE = "domain";
+
+          // Build where clause for starts-with query on normalizedLabel
+          const whereClause = JSON.stringify([
+            ["normalizedLabel", "startsWith", values.prefix.toLowerCase()],
+            ["normalizedParentDomainName", "==", "dash"]
+          ]);
+
+          // Order by normalizedLabel ascending
+          const orderBy = JSON.stringify([
+            ["normalizedLabel", "asc"]
+          ]);
+
+          // Execute the document query
+          const documents = await get_documents(
+            sdk,
+            DPNS_CONTRACT_ID,
+            DPNS_DOCUMENT_TYPE,
+            whereClause,
+            orderBy,
+            limit,
+            null, // startAfter
+            null  // startAt
+          );
+
+          // Transform the results to show username and owner identity
+          const searchResults = documents.map(doc => {
+            // Access the data field which contains the DPNS document fields
+            const data = doc.data || doc;
+
+            return {
+              username: `${data.normalizedLabel || data.label || 'unknown'}.${data.normalizedParentDomainName || 'dash'}`,
+              label: data.label || '',
+              normalizedLabel: data.normalizedLabel || '',
+              ownerId: doc.ownerId || doc.$ownerId || '',
+              documentId: doc.id || doc.$id || ''
+            };
+          });
+
+          result = {
+            prefix: values.prefix,
+            totalResults: searchResults.length,
+            limit: limit,
+            results: searchResults,
+            message: searchResults.length > 0 
+              ? `Found ${searchResults.length} name(s) starting with "${values.prefix}"` 
+              : `No names found starting with "${values.prefix}"`
+          };
         }
         // Protocol/Version queries
         else if (queryType === 'getProtocolVersionUpgradeState') {