Fix: adds created_by_operator constraint for duplicate checking

migrations/1609346970940-alter-blacklist-unique-constraint.js

@@ -0,0 +1,16 @@
+var db = require('./db')
+
+exports.up = function (next) {
+  var sql = [
+    `ALTER TABLE blacklist DROP CONSTRAINT blacklist_crypto_code_address_key`,
+    `ALTER TABLE blacklist ADD CONSTRAINT blacklist_crypto_code_address_created_by_operator_key UNIQUE (crypto_code, address, created_by_operator)`,
+    `CREATE INDEX ON blacklist (created_by_operator)`,
+    `REINDEX TABLE blacklist`
+  ]
+
+  db.multi(sql, next)
+}
+
+exports.down = function (next) {
+  next()
+}