Basic bitcoind/romanz-electrum support to sync the mempool and blocks.

backend/src/api/bitcoin/bitcoin-api-factory.ts

@@ -0,0 +1,19 @@
+import config from '../../config';
+import { AbstractBitcoinApi } from './bitcoin-api-abstract-factory';
+import BitcoindElectrsApi from './bitcoind-electrs-api';
+import BitcoindApi from './bitcoind-api';
+import ElectrsApi from './electrs-api';
+
+function bitcoinApiFactory(): AbstractBitcoinApi {
+  switch (config.MEMPOOL.BACKEND) {
+    case 'electrs':
+      return new ElectrsApi();
+    case 'bitcoind-electrs':
+      return new BitcoindElectrsApi();
+    case 'bitcoind':
+    default:
+      return new BitcoindApi();
+  }
+}
+
+export default bitcoinApiFactory();