Give false if spent information not available.

lib/services/address/index.js

@@ -8,6 +8,7 @@ var log = index.log;
 var errors = index.errors;
 var Transaction = require('../../transaction');
 var bitcore = require('bitcore');
+var levelup = require('levelup');
 var $ = bitcore.util.preconditions;
 var _ = bitcore.deps._;
 var Hash = bitcore.crypto.Hash;
@@ -763,7 +764,9 @@ AddressService.prototype.getInputForOutput = function(txid, outputIndex, options
     keyEncoding: 'binary'
   };
   this.node.services.db.store.get(key, dbOptions, function(err, buffer) {
-    if (err) {
+    if (err instanceof levelup.errors.NotFoundError) {
+      return callback(null, false);
+    } else if (err) {
       return callback(err);
     }
     var value = self._decodeInputValueMap(buffer);