use bulk /txs endpoint to check cached rbf tx status

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

@@ -3,6 +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>;
+  $getRawTransactions(txids: string[]): Promise<IEsploraApi.Transaction[]>;
   $getMempoolTransactions(txids: string[]): Promise<IEsploraApi.Transaction[]>;
   $getAllMempoolTransactions(lastTxid: string);
   $getTransactionHex(txId: string): Promise<string>;

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

@@ -60,6 +60,10 @@ class BitcoinApi implements AbstractBitcoinApi {
       });
   }
 
+  $getRawTransactions(txids: string[]): Promise<IEsploraApi.Transaction[]> {
+    throw new Error('Method getRawTransactions not supported by the Bitcoin RPC API.');
+  }
+
   $getMempoolTransactions(txids: string[]): Promise<IEsploraApi.Transaction[]> {
     throw new Error('Method getMempoolTransactions not supported by the Bitcoin RPC API.');
   }

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

@@ -213,6 +213,10 @@ class ElectrsApi implements AbstractBitcoinApi {
     return this.failoverRouter.$get<IEsploraApi.Transaction>('/tx/' + txId);
   }
 
+  async $getRawTransactions(txids: string[]): Promise<IEsploraApi.Transaction[]> {
+    return this.$postWrapper<IEsploraApi.Transaction[]>(config.ESPLORA.REST_API_URL + '/txs', txids, 'json');
+  }
+
   async $getMempoolTransactions(txids: string[]): Promise<IEsploraApi.Transaction[]> {
     return this.failoverRouter.$post<IEsploraApi.Transaction[]>('/internal/mempool/txs', txids, 'json');
   }