From 71778e9450ab9bbe42dcb0f359bc131caaf6c130 Mon Sep 17 00:00:00 2001
From: Maciej Hirsz <1096222+maciejhirsz@users.noreply.github.com>
Date: Thu, 21 Feb 2019 16:39:22 +0100
Subject: [PATCH] Downgrade finalized block on disconnect (#115)

---
 packages/backend/src/Chain.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/packages/backend/src/Chain.ts b/packages/backend/src/Chain.ts
index 1701868..14f04b6 100644
--- a/packages/backend/src/Chain.ts
+++ b/packages/backend/src/Chain.ts
@@ -126,6 +126,7 @@ export default class Chain {
 
   private downgradeBlock() {
     let height = 0 as Types.BlockNumber;
+    let finalized = Block.ZERO;
 
     for (const node of this.nodes) {
       if (this.height === node.best.number) {
@@ -135,10 +136,16 @@ export default class Chain {
       if (node.best.number > height) {
         height = node.best.number;
       }
+
+      if (node.finalized.number > finalized.number) {
+        finalized = node.finalized;
+      }
     }
 
     this.height = height;
+    this.finalized = finalized;
     this.feeds.broadcast(Feed.bestBlock(this.height, this.blockTimestamp, this.averageBlockTime));
+    this.feeds.broadcast(Feed.bestFinalizedBlock(this.finalized));
   }
 
   private updateFinalized(node: Node) {