From ff74e6ea8caca1a8f35bc25c6d01982cacf0ab0e Mon Sep 17 00:00:00 2001
From: nymkappa <vialjoris@hotmail.com>
Date: Wed, 20 Apr 2022 13:40:10 +0900
Subject: [PATCH] If block exists in memory cache, return it directly for
 /block API

---
 backend/src/api/blocks.ts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/backend/src/api/blocks.ts b/backend/src/api/blocks.ts
index a723f8069..9d2e91c78 100644
--- a/backend/src/api/blocks.ts
+++ b/backend/src/api/blocks.ts
@@ -392,6 +392,12 @@ class Blocks {
    * Index a block by hash if it's missing from the database. Returns the block after indexing
    */
   public async $getBlock(hash: string): Promise<BlockExtended | IEsploraApi.Block> {
+    // Check the memory cache
+    const blockByHash = this.getBlocks().find((b) => b.id === hash);
+    if (blockByHash) {
+      return blockByHash;
+    }
+
     // Block has already been indexed
     if (Common.indexingEnabled()) {
       const dbBlock = await blocksRepository.$getBlockByHash(hash);