From a9efb8715e229bfd7ee9cb6e086fb60e31b024f7 Mon Sep 17 00:00:00 2001
From: teor <teor@riseup.net>
Date: Mon, 22 Jun 2020 10:17:34 +1000
Subject: [PATCH] chain: Update the note about time truncation

---
 zebra-chain/src/block.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/zebra-chain/src/block.rs b/zebra-chain/src/block.rs
index e2058fc46..4392db124 100644
--- a/zebra-chain/src/block.rs
+++ b/zebra-chain/src/block.rs
@@ -146,7 +146,8 @@ impl ZcashSerialize for BlockHeader {
         writer.write_all(&self.merkle_root_hash.0[..])?;
         writer.write_all(&self.final_sapling_root_hash.0[..])?;
         // this is a truncating cast, rather than a saturating cast
-        // but u32 times are valid until 2106
+        // but u32 times are valid until 2106, and our block verification time
+        // checks should detect any truncation.
         writer.write_u32::<LittleEndian>(self.time.timestamp() as u32)?;
         writer.write_u32::<LittleEndian>(self.bits)?;
         writer.write_all(&self.nonce[..])?;