Add electrs sync progress updates

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

@@ -3,7 +3,7 @@ import { IEsploraApi } from './esplora-api.interface';
 export interface AbstractBitcoinApi {
   $getRawMempool(): Promise<IEsploraApi.Transaction['txid'][]>;
   $getRawTransaction(txId: string, skipConversion?: boolean, addPrevout?: boolean, lazyPrevouts?: boolean): Promise<IEsploraApi.Transaction>;
-  $getMempoolTransactions(expectedCount: number);
+  $getMempoolTransactions(lastTxid: string);
   $getTransactionHex(txId: string): Promise<string>;
   $getBlockHeightTip(): Promise<number>;
   $getBlockHashTip(): Promise<string>;