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[mining] segwit option must be set in GBT

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Calling getblocktemplate without the segwit rule specified is most
likely a client error, since it results in lower fees for the miner.
Prevent this client error by failing getblocktemplate if called without
the segwit rule specified.
This commit is contained in:
John Newbery
2018-11-26 11:17:38 -05:00
parent 5f23460c7e
commit 0025c9eae4
10 changed files with 30 additions and 62 deletions
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11
test/functional/mining_basic.py
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@@ -30,7 +30,7 @@ from test_framework.script import CScriptNum
def assert_template(node, block, expect, rehash=True):
if rehash:
block.hashMerkleRoot = block.calc_merkle_root()
rsp = node.getblocktemplate(template_request={'data': b2x(block.serialize()), 'mode': 'proposal'})
rsp = node.getblocktemplate(template_request={'data': b2x(block.serialize()), 'mode': 'proposal', 'rules': ['segwit']})
assert_equal(rsp, expect)
@@ -60,7 +60,7 @@ class MiningTest(BitcoinTestFramework):
# Mine a block to leave initial block download
node.generatetoaddress(1, node.get_deterministic_priv_key().address)
tmpl = node.getblocktemplate()
tmpl = node.getblocktemplate({'rules': ['segwit']})
self.log.info("getblocktemplate: Test capability advertised")
assert 'proposal' in tmpl['capabilities']
assert 'coinbasetxn' not in tmpl
@@ -86,6 +86,9 @@ class MiningTest(BitcoinTestFramework):
block.nNonce = 0
block.vtx = [coinbase_tx]
self.log.info("getblocktemplate: segwit rule must be set")
assert_raises_rpc_error(-8, "getblocktemplate must be called with the segwit rule set", node.getblocktemplate)
self.log.info("getblocktemplate: Test valid block")
assert_template(node, block, None)
@@ -102,7 +105,7 @@ class MiningTest(BitcoinTestFramework):
assert_raises_rpc_error(-22, "Block does not start with a coinbase", node.submitblock, b2x(bad_block.serialize()))
self.log.info("getblocktemplate: Test truncated final transaction")
assert_raises_rpc_error(-22, "Block decode failed", node.getblocktemplate, {'data': b2x(block.serialize()[:-1]), 'mode': 'proposal'})
assert_raises_rpc_error(-22, "Block decode failed", node.getblocktemplate, {'data': b2x(block.serialize()[:-1]), 'mode': 'proposal', 'rules': ['segwit']})
self.log.info("getblocktemplate: Test duplicate transaction")
bad_block = copy.deepcopy(block)
@@ -132,7 +135,7 @@ class MiningTest(BitcoinTestFramework):
bad_block_sn = bytearray(block.serialize())
assert_equal(bad_block_sn[TX_COUNT_OFFSET], 1)
bad_block_sn[TX_COUNT_OFFSET] += 1
assert_raises_rpc_error(-22, "Block decode failed", node.getblocktemplate, {'data': b2x(bad_block_sn), 'mode': 'proposal'})
assert_raises_rpc_error(-22, "Block decode failed", node.getblocktemplate, {'data': b2x(bad_block_sn), 'mode': 'proposal', 'rules': ['segwit']})
self.log.info("getblocktemplate: Test bad bits")
bad_block = copy.deepcopy(block)