Fetch block txs from mempool/electrs in bulk

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

@@ -8,6 +8,7 @@ export interface AbstractBitcoinApi {
   $getBlockHeightTip(): Promise<number>;
   $getBlockHashTip(): Promise<string>;
   $getTxIdsForBlock(hash: string): Promise<string[]>;
+  $getTxsForBlock(hash: string): Promise<IEsploraApi.Transaction[]>;
   $getBlockHash(height: number): Promise<string>;
   $getBlockHeader(hash: string): Promise<string>;
   $getBlock(hash: string): Promise<IEsploraApi.Block>;

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

@@ -81,6 +81,10 @@ class BitcoinApi implements AbstractBitcoinApi {
       .then((rpcBlock: IBitcoinApi.Block) => rpcBlock.tx);
   }
 
+  $getTxsForBlock(hash: string): Promise<IEsploraApi.Transaction[]> {
+    throw new Error('Method getTxsForBlock not supported by the Bitcoin RPC API.');
+  }
+
   $getRawBlock(hash: string): Promise<Buffer> {
     return this.bitcoindClient.getBlock(hash, 0)
       .then((raw: string) => Buffer.from(raw, "hex"));

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

@@ -89,6 +89,10 @@ class ElectrsApi implements AbstractBitcoinApi {
     return this.$queryWrapper<string[]>(config.ESPLORA.REST_API_URL + '/block/' + hash + '/txids');
   }
 
+  $getTxsForBlock(hash: string): Promise<IEsploraApi.Transaction[]> {
+    return this.$queryWrapper<IEsploraApi.Transaction[]>(config.ESPLORA.REST_API_URL + '/block/' + hash + '/txs');
+  }
+
   $getBlockHash(height: number): Promise<string> {
     return this.$queryWrapper<string>(config.ESPLORA.REST_API_URL + '/block-height/' + height);
   }