From ed80df5ebc654c7da3f74572b109432430f08450 Mon Sep 17 00:00:00 2001
From: Martin Habovstiak <martin.habovstiak@gmail.com>
Date: Sun, 26 Mar 2023 10:40:30 +0200
Subject: [PATCH] Add `ChainHash::from_genesis_block_hash`

This improves readability of converting `BlockHash` into `ChainHash`.
It's useful in e.g. Electrum protocol which sends `BlockHash`
(serialized backward).

Closes #1751
---
 bitcoin/src/blockdata/constants.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/bitcoin/src/blockdata/constants.rs b/bitcoin/src/blockdata/constants.rs
index 01d8238c..7a737d38 100644
--- a/bitcoin/src/blockdata/constants.rs
+++ b/bitcoin/src/blockdata/constants.rs
@@ -185,6 +185,11 @@ impl ChainHash {
         let hashes = [Self::BITCOIN, Self::TESTNET, Self::SIGNET, Self::REGTEST];
         hashes[network as usize]
     }
+
+    /// Converts genesis block hash into `ChainHash`.
+    pub fn from_genesis_block_hash(block_hash: crate::BlockHash) -> Self {
+        ChainHash(block_hash.to_byte_array())
+    }
 }
 
 #[cfg(test)]