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Test for block-blinding by txinwit-overstuffed block

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This commit is contained in:
Gregory Sanders 2019-03-25 09:50:12 -04:00
parent 789d4b97f7
commit 8b2e8859d6
1 changed files with 16 additions and 1 deletions
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17
test/functional/feature_txwitness.py
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@ -148,10 +148,25 @@ class TxWitnessTest(BitcoinTestFramework):
block_witness_stuffed.vtx[0].wit.vtxinwit[0].vchInflationKeysRangeproof = b'\x00'
assert_raises_rpc_error(-25, "bad-cb-witness", self.nodes[0].testproposedblock, WitToHex(block_witness_stuffed))
block_witness_stuffed = copy.deepcopy(block_struct)
block_witness_stuffed.vtx[0].wit.vtxinwit[0].peginWitness.stack = [b'\x00']
# Let's blow out block weight limit by adding 4MW here
block_witness_stuffed.vtx[0].wit.vtxinwit[0].peginWitness.stack = [b'\x00'*4000000]
assert_raises_rpc_error(-25, "bad-cb-witness", self.nodes[0].testproposedblock, WitToHex(block_witness_stuffed))
# Test that node isn't blinded to the block
# Previously an over-stuffed block >4MW would have been marked permanently bad
# as it already passes witness merkle and regular merkle root checks
block_height = self.nodes[0].getblockcount()
assert_equal(self.nodes[0].submitblock(WitToHex(block_witness_stuffed)), "bad-cb-witness")
assert_equal(block_height, self.nodes[0].getblockcount())
assert_equal(self.nodes[0].submitblock(WitToHex(block_struct)), None)
assert_equal(block_height+1, self.nodes[0].getblockcount())
# New block since we used the first one
block_struct = FromHex(CBlock(), self.nodes[0].getnewblockhex())
block_witness_stuffed = copy.deepcopy(block_struct)
# Add extra witness data that is covered by witness merkle root, make sure invalid until
# witness merkle root is recalculated
assert_equal(block_witness_stuffed.vtx[0].wit.vtxoutwit[0].vchSurjectionproof, b'')