From 088781babb36703e77744678a0166345595c85b6 Mon Sep 17 00:00:00 2001
From: Willian Mitsuda <wmitsuda@gmail.com>
Date: Fri, 18 Feb 2022 04:11:10 -0300
Subject: [PATCH] Fix negative block numbers

---
 src/components/BlockNotFound.tsx | 8 +++-----
 src/useErigonHooks.ts            | 6 +++++-
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/src/components/BlockNotFound.tsx b/src/components/BlockNotFound.tsx
index 6a875db..b1ddee8 100644
--- a/src/components/BlockNotFound.tsx
+++ b/src/components/BlockNotFound.tsx
@@ -6,11 +6,9 @@ type BlockNotFoundProps = {
 };
 
 const BlockNotFound: React.FC<BlockNotFoundProps> = ({ blockNumberOrHash }) => (
-  <>
-    <ContentFrame>
-      <div className="py-4 text-sm">Block "{blockNumberOrHash}" not found.</div>
-    </ContentFrame>
-  </>
+  <ContentFrame>
+    <div className="py-4 text-sm">Block "{blockNumberOrHash}" not found.</div>
+  </ContentFrame>
 );
 
 export default React.memo(BlockNotFound);
diff --git a/src/useErigonHooks.ts b/src/useErigonHooks.ts
index c0d958b..ad9b0b8 100644
--- a/src/useErigonHooks.ts
+++ b/src/useErigonHooks.ts
@@ -43,7 +43,11 @@ export const readBlock = async (
       blockNumberOrHash,
     ]);
   } else {
-    blockPromise = provider.send("ots_getBlockDetails", [blockNumberOrHash]);
+    const blockNumber = parseInt(blockNumberOrHash);
+    if (isNaN(blockNumber) || blockNumber < 0) {
+      return null;
+    }
+    blockPromise = provider.send("ots_getBlockDetails", [blockNumber]);
   }
 
   const _rawBlock = await blockPromise;