userToIncomingID getter

services/gunDB/contact-api/getters.js

@@ -1,3 +1,5 @@
+const {getUser} = require('../Mediator')
+
 const Key = require('./key')
 const Utils = require('./utils')
 
@@ -13,4 +15,17 @@ exports.currentOrderAddress = async (pub) => {
   }
 
   return currAddr
+}
+
+/**
+ * @param {string} pub
+ * @returns {Promise<string|null>}
+ */
+exports.userToIncomingID = async (pub) => {
+  const incomingID = await getUser().get(Key.USER_TO_INCOMING).get(pub).then()
+
+  if (typeof incomingID === 'string') return incomingID
+
+  return null
+
 }