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pytest: neaten fund_channel scid extraction.

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We used to have a bug where decoderawtransaction would fail, fixed in
fedcfd661 (pytest: hand 'True' to decoderawtransaction so it doesn't
get confused.).

So we can remove the fallback decode, and might as well extract the
ugliness into a helper function.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2019-01-15 15:52:22 +10:30
committed by neil saitug
parent a00c357854
commit 4c57bf002e
1 changed files with 14 additions and 13 deletions
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27
tests/utils.py
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@@ -83,6 +83,18 @@ def wait_channel_quiescent(n1, n2):
wait_for(lambda: only_one(only_one(n2.rpc.listpeers(n1.info['id'])['peers'])['channels'])['htlcs'] == [])
def get_tx_p2wsh_outnum(bitcoind, tx, amount):
"""Get output number of this tx which is p2wsh of amount"""
decoded = bitcoind.rpc.decoderawtransaction(tx, True)
for out in decoded['vout']:
if out['scriptPubKey']['type'] == 'witness_v0_scripthash':
if out['value'] == Decimal(amount) / 10**8:
return out['n']
return None
class TailableProc(object):
"""A monitorable process that we can start, stop and tail.
@@ -519,19 +531,8 @@ class LightningNode(object):
self.bitcoin.generate_block(1)
# Hacky way to find our output.
scid = None
decoded = self.bitcoin.rpc.decoderawtransaction(tx, True)
for out in decoded['vout']:
if out['scriptPubKey']['type'] == 'witness_v0_scripthash':
if out['value'] == Decimal(amount) / 10**8:
scid = "{}x1x{}".format(self.bitcoin.rpc.getblockcount(), out['n'])
break
if not scid:
# Intermittent decoding failure. See if it decodes badly twice?
decoded2 = self.bitcoin.rpc.decoderawtransaction(tx)
raise ValueError("Can't find {} payment in {} (1={} 2={})".format(amount, tx, decoded, decoded2))
scid = "{}x1x{}".format(self.bitcoin.rpc.getblockcount(),
get_tx_p2wsh_outnum(self.bitcoin, tx, amount))
if wait_for_active:
# We wait until gossipd sees both local updates, as well as status NORMAL,