fix timestamp generation and check

Cargo.lock

@@ -688,6 +688,7 @@ dependencies = [
  "chain 0.1.0",
  "primitives 0.1.0",
  "serialization 0.1.0",
+ "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]

test-data/Cargo.toml

@@ -7,3 +7,4 @@ authors = ["Nikolay Volf <nikvolf@gmail.com>"]
 chain = { path = "../chain"  }
 primitives = { path = "../primitives" }
 serialization = { path = "../serialization" }
+time = "0.1"

test-data/src/block.rs

@@ -182,7 +182,7 @@ impl<F> BlockHeaderBuilder<F> where F: Invoke<chain::BlockHeader> {
 	pub fn with_callback(callback: F) -> Self {
 		BlockHeaderBuilder {
 			callback: callback,
-			time: 0,
+			time: ::time::get_time().sec as u32,
 			nonce: 0,
 			merkle_root: H256::from(0),
 			parent: H256::from(0),

test-data/src/lib.rs

@@ -3,6 +3,7 @@
 extern crate chain;
 extern crate primitives;
 extern crate serialization as ser;
+extern crate time;
 
 use chain::Block;
 

verification/src/chain_verifier.rs

@@ -65,7 +65,7 @@ impl ChainVerifier {
 		}
 
 		if let Some(median_timestamp) = self.ordered_median_timestamp(block, at_height) {
-			if median_timestamp >= block.block_header.time {
+			if median_timestamp > block.block_header.time {
 				trace!(target: "verification", "median timestamp verification failed, median: {}, current: {}", median_timestamp, block.block_header.time);
 				return Err(Error::Timestamp);
 			}