Save bisq aggregate exchange rates in the database for each new block

backend/src/api/database-migration.ts

@@ -4,7 +4,7 @@ import logger from '../logger';
 import { Common } from './common';
 
 class DatabaseMigration {
-  private static currentVersion = 18;
+  private static currentVersion = 19;
   private queryTimeout = 120000;
   private statisticsAddedIndexed = false;
 
@@ -184,6 +184,10 @@ class DatabaseMigration {
       if (databaseSchemaVersion < 18 && isBitcoin === true) {
         await this.$executeQuery('ALTER TABLE `blocks` ADD INDEX `hash` (`hash`);');
       }
+
+      if (databaseSchemaVersion < 19 && isBitcoin === true) {
+        await this.$executeQuery(this.getCreateRatesTableQuery(), await this.$checkIfTableExists('rates'));
+      }
     } catch (e) {
       throw e;
     }
@@ -466,6 +470,14 @@ class DatabaseMigration {
     ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
   }
 
+  private getCreateRatesTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS rates (
+      height int(10) unsigned NOT NULL,
+      bisq_rates JSON NOT NULL,
+      PRIMARY KEY (height)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
   public async $truncateIndexedData(tables: string[]) {
     const allowedTables = ['blocks', 'hashrates'];