Enforce BlockExtended use for block indexing - Unify /api/v1/block(s) API(s) response format

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

@@ -172,4 +172,35 @@ export namespace IBitcoinApi {
     }
   }
 
+  export interface BlockStats {
+    "avgfee": number;
+    "avgfeerate": number;
+    "avgtxsize": number;
+    "blockhash": string;
+    "feerate_percentiles": [number, number, number, number, number];
+    "height": number;
+    "ins": number;
+    "maxfee": number;
+    "maxfeerate": number;
+    "maxtxsize": number;
+    "medianfee": number;
+    "mediantime": number;
+    "mediantxsize": number;
+    "minfee": number;
+    "minfeerate": number;
+    "mintxsize": number;
+    "outs": number;
+    "subsidy": number;
+    "swtotal_size": number;
+    "swtotal_weight": number;
+    "swtxs": number;
+    "time": number;
+    "total_out": number;
+    "total_size": number;
+    "total_weight": number;
+    "totalfee": number;
+    "txs": number;
+    "utxo_increase": number;
+    "utxo_size_inc": number;
+  }
 }

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

@@ -28,7 +28,7 @@ class BitcoinApi implements AbstractBitcoinApi {
       size: block.size,
       weight: block.weight,
       previousblockhash: block.previousblockhash,
-      medianTime: block.mediantime,
+      mediantime: block.mediantime,
     };
   }
 

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

@@ -88,7 +88,7 @@ export namespace IEsploraApi {
     size: number;
     weight: number;
     previousblockhash: string;
-    medianTime?: number;
+    mediantime: number;
   }
 
   export interface Address {