Prevent address reuse option

lib/blacklist.js

@@ -8,4 +8,15 @@ function blocked (address, cryptoCode) {
   ])
 }
 
-module.exports = { blocked }
+function addToUsedAddresses (address, cryptoCode) {
+  // ETH reuses addresses
+  if (cryptoCode === 'ETH') return Promise.resolve()
+
+  const sql = `insert into blacklist(crypto_code, address, created_by_operator) values ($1, $2, 'f')`
+  return db.oneOrNone(sql, [
+    cryptoCode,
+    address
+  ])
+}
+
+module.exports = { blocked, addToUsedAddresses }