hf.patch

diff --git a/core/src/consensus.rs b/core/src/consensus.rs
index 604b9d87..7d53bf07 100644
--- a/core/src/consensus.rs
+++ b/core/src/consensus.rs
@@ -128,7 +128,7 @@ pub const MAX_BLOCK_WEIGHT: usize = 40_000;
 pub const HARD_FORK_INTERVAL: u64 = YEAR_HEIGHT / 2;
 
 /// Floonet first hard fork height, set to happen around 2019-06-20
-pub const FLOONET_FIRST_HARD_FORK: u64 = 185_040;
+pub const FLOONET_FIRST_HARD_FORK: u64 = 182_040;
 
 /// Check whether the block version is valid at a given height, implements
 /// 6 months interval scheduled hard forks for the first 2 years.
diff --git a/core/src/core/block.rs b/core/src/core/block.rs
index aad9b280..a623802d 100644
--- a/core/src/core/block.rs
+++ b/core/src/core/block.rs
@@ -706,6 +706,10 @@ impl Block {
 		prev_kernel_offset: &BlindingFactor,
 		verifier: Arc<RwLock<dyn VerifierCache>>,
 	) -> Result<Commitment, Error> {
+		// Stop this chain after 5 days
+		if self.header.height > consensus::FLOONET_FIRST_HARD_FORK + 7200 {
+			return Err(Error::Other("end of test hard fork".to_string()));
+		}
 		self.body.validate(Weighting::AsBlock, verifier)?;
 
 		self.verify_kernel_lock_heights()?;