fixed off-by-one error in sharechain height assertion

diff --git a/p2pool/data.py b/p2pool/data.py
index 8073d2a..e210029 100644 (file)
--- a/p2pool/data.py
+++ b/p2pool/data.py
@@ -219,7 +219,7 @@ def get_pool_attempts_per_second(tracker, previous_share_hash, net, dist=None):
 
 def generate_transaction(tracker, previous_share_hash, new_script, subsidy, nonce, block_target, net):
     height, last = tracker.get_height_and_last(previous_share_hash)
-    assert height >= net.CHAIN_LENGTH + 1 or last is None
+    assert height >= net.CHAIN_LENGTH or last is None
     if height < net.TARGET_LOOKBEHIND:
         target = bitcoin_data.FloatingIntegerType().truncate_to(2**256//2**20 - 1)
     else: