node-rpc: spv can use urkel for namebyhash and verifywithname

lib/node/rpc.js

@@ -2212,7 +2212,21 @@ class RPC extends RPCBase {
       throw new RPCError(errs.TYPE_ERROR, 'Invalid name.');
 
     const nameHash = rules.hashName(name);
-    const ns = await this.chain.db.getNameState(nameHash);
+
+    let ns;
+    if (this.chain.options.spv) {
+      // This root is "unsafe" (might have less than 12 confirmations).
+      const root = this.chain.tip.treeRoot;
+      // This data may be outdated, if a namestate has been updated
+      // since the last tree interval.
+      const data = await this.pool.resolveAtRoot(nameHash, root);
+      if (data) {
+        ns = NameState.decode(data);
+        ns.nameHash = nameHash;
+      }
+    } else {
+      ns = await this.chain.db.getNameState(nameHash);
+    }
 
     if (!ns || !ns.owner)
       throw new RPCError(errs.MISC_ERROR, 'Cannot find the name owner.');
@@ -2552,7 +2566,20 @@ class RPC extends RPCBase {
     if (!hash)
       throw new RPCError(errs.TYPE_ERROR, 'Invalid name hash.');
 
-    const ns = await this.chain.db.getNameState(hash);
+    let ns;
+    if (this.chain.options.spv) {
+      // This root is "unsafe" (might have less than 12 confirmations).
+      const root = this.chain.tip.treeRoot;
+      // This data may be outdated, if a namestate has been updated
+      // since the last tree interval.
+      const data = await this.pool.resolveAtRoot(hash, root);
+      if (data) {
+        ns = NameState.decode(data);
+        ns.nameHash = hash;
+      }
+    } else {
+      ns = await this.chain.db.getNameState(hash);
+    }
 
     if (!ns)
       return null;