fix: clean up code

lib/blacklist.js

@@ -27,15 +27,8 @@ const insertIntoBlacklist = address => {
 
 function blocked (address) {
   const sql = `SELECT address, content FROM blacklist b LEFT OUTER JOIN blacklist_messages bm ON bm.id = b.blacklist_message_id WHERE address = $1`
-  return db.any(sql, [address])
-}
-
-function addToUsedAddresses (address) {
-  // ETH reuses addresses
-  // if (cryptoCode === 'ETH') return Promise.resolve()
-
-  const sql = `INSERT INTO blacklist (address) VALUES ($1)`
   return db.oneOrNone(sql, [address])
+    .then(r => !_.isNil(r))
 }
 
 function getMessages () {
@@ -50,7 +43,6 @@ function editBlacklistMessage (id, content) {
 
 module.exports = {
   blocked,
-  addToUsedAddresses,
   getBlacklist,
   deleteFromBlacklist,
   insertIntoBlacklist,