feat: turn address into a coin-agnostic solution

migrations/1664907000312-coin-agnostic-blacklist.js

@@ -0,0 +1,18 @@
+var db = require('./db')
+
+exports.up = function (next) {
+  var sql = [
+    `CREATE TABLE blacklist_temp (
+      address TEXT NOT NULL UNIQUE
+    )`
+    `INSERT INTO blacklist_temp (address) SELECT DISTINCT address FROM blacklist`,
+    `DROP TABLE blacklist`,
+    `ALTER TABLE blacklist_temp RENAME TO blacklist`
+  ]
+
+  db.multi(sql, next)
+}
+
+exports.down = function (next) {
+  next()
+}