From 2b9be35afaa49a10493763f61cc681c71c199a82 Mon Sep 17 00:00:00 2001
From: softsimon <softsimon@protonmail.com>
Date: Tue, 3 Mar 2020 15:11:14 +0700
Subject: [PATCH] Fast forward the block fetching if backend has been offline
 for a while.

---
 backend/src/api/blocks.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/backend/src/api/blocks.ts b/backend/src/api/blocks.ts
index 89a719ace..018c78c4b 100644
--- a/backend/src/api/blocks.ts
+++ b/backend/src/api/blocks.ts
@@ -32,6 +32,11 @@ class Blocks {
         this.currentBlockHeight = this.blocks[this.blocks.length - 1].height;
       }
 
+      if (blockHeightTip - this.currentBlockHeight > config.INITIAL_BLOCK_AMOUNT * 2) {
+        console.log(`${blockHeightTip - this.currentBlockHeight} blocks since tip. Fast forwarding to the ${config.INITIAL_BLOCK_AMOUNT} recent blocks`);
+        this.currentBlockHeight = blockHeightTip - config.INITIAL_BLOCK_AMOUNT;
+      }
+
       while (this.currentBlockHeight < blockHeightTip) {
         if (this.currentBlockHeight === 0) {
           this.currentBlockHeight = blockHeightTip;