From 97b43cb8ffd900219c18a1be457809c8559ddfbd Mon Sep 17 00:00:00 2001
From: Arya <aryasolhi@gmail.com>
Date: Fri, 19 Apr 2024 15:36:44 -0400
Subject: [PATCH] Copies Regtest genesis block from zcashd

---
 zebra-chain/src/block.rs                         |  1 +
 zebra-chain/src/block/genesis.rs                 | 16 ++++++++++++++++
 .../block/genesis/block-regtest-0-000-000.txt    |  1 +
 3 files changed, 18 insertions(+)
 create mode 100644 zebra-chain/src/block/genesis.rs
 create mode 100644 zebra-chain/src/block/genesis/block-regtest-0-000-000.txt

diff --git a/zebra-chain/src/block.rs b/zebra-chain/src/block.rs
index 8b45b5ea5..8fb4388e2 100644
--- a/zebra-chain/src/block.rs
+++ b/zebra-chain/src/block.rs
@@ -25,6 +25,7 @@ mod header;
 mod height;
 mod serialize;
 
+pub mod genesis;
 pub mod merkle;
 
 #[cfg(any(test, feature = "proptest-impl"))]
diff --git a/zebra-chain/src/block/genesis.rs b/zebra-chain/src/block/genesis.rs
new file mode 100644
index 000000000..460f26e90
--- /dev/null
+++ b/zebra-chain/src/block/genesis.rs
@@ -0,0 +1,16 @@
+//! Regtest genesis block
+
+use hex::FromHex;
+
+use crate::{block::Block, serialization::ZcashDeserializeInto};
+
+/// Genesis block for Regtest, copied from zcashd via `getblock 0 0` RPC method
+pub fn regtest_genesis_block() -> Block {
+    let regtest_genesis_block_bytes =
+        <Vec<u8>>::from_hex(include_str!("genesis/block-regtest-0-000-000.txt").trim())
+            .expect("Block bytes are in valid hex representation");
+
+    regtest_genesis_block_bytes
+        .zcash_deserialize_into()
+        .expect("hard-coded Regtest genesis block data must deserialize successfully")
+}
diff --git a/zebra-chain/src/block/genesis/block-regtest-0-000-000.txt b/zebra-chain/src/block/genesis/block-regtest-0-000-000.txt
new file mode 100644
index 000000000..83287eb44
--- /dev/null
+++ b/zebra-chain/src/block/genesis/block-regtest-0-000-000.txt
@@ -0,0 +1 @@
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
\ No newline at end of file