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-rwxr-xr-xtest/functional/mining_basic.py12
1 files changed, 10 insertions, 2 deletions
diff --git a/test/functional/mining_basic.py b/test/functional/mining_basic.py
index 9f01be0646..6e74731349 100755
--- a/test/functional/mining_basic.py
+++ b/test/functional/mining_basic.py
@@ -25,7 +25,7 @@ from test_framework.util import (
assert_raises_rpc_error,
bytes_to_hex_str as b2x,
)
-
+from test_framework.script import CScriptNum
def assert_template(node, block, expect, rehash=True):
if rehash:
@@ -65,11 +65,19 @@ class MiningTest(BitcoinTestFramework):
assert 'proposal' in tmpl['capabilities']
assert 'coinbasetxn' not in tmpl
- coinbase_tx = create_coinbase(height=int(tmpl["height"]) + 1)
+ next_height = int(tmpl["height"])
+ coinbase_tx = create_coinbase(height=next_height)
# sequence numbers must not be max for nLockTime to have effect
coinbase_tx.vin[0].nSequence = 2 ** 32 - 2
coinbase_tx.rehash()
+ # round-trip the encoded bip34 block height commitment
+ assert_equal(CScriptNum.decode(coinbase_tx.vin[0].scriptSig), next_height)
+ # round-trip negative and multi-byte CScriptNums to catch python regression
+ assert_equal(CScriptNum.decode(CScriptNum.encode(CScriptNum(1500))), 1500)
+ assert_equal(CScriptNum.decode(CScriptNum.encode(CScriptNum(-1500))), -1500)
+ assert_equal(CScriptNum.decode(CScriptNum.encode(CScriptNum(-1))), -1)
+
block = CBlock()
block.nVersion = tmpl["version"]
block.hashPrevBlock = int(tmpl["previousblockhash"], 16)