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plugins: simplify htlc_accepted hook payload-setting API.

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As discussed with Christian, prepending the length to the payload returned
is awkward, but it's the only way to set a legacy payload.  As this will
be soon deprecated, simplify the external API.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2020-04-14 11:36:00 +09:30
parent de0fd1f274
commit bf053dcf7c
3 changed files with 13 additions and 10 deletions
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9
tests/plugins/replace_payload.py
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@@ -13,11 +13,16 @@ plugin = Plugin()
def on_htlc_accepted(htlc, onion, plugin, **kwargs):
# eg. '2902017b04016d0821fff5b6bd5018c8731aa0496c3698ef49f132ef9a3000c94436f4957e79a2f8827b'
# (but values change depending on pay's randomness!)
print("payload was:{}".format(onion['payload']))
assert onion['payload'][0:2] == '29'
if plugin.replace_payload == 'corrupt_secret':
# Note: we don't include length prefix in returned payload, since it doesn't
# support the pre-TLV legacy form.
if onion['payload'][18] == '0':
newpayload = onion['payload'][:18] + '1' + onion['payload'][19:]
newpayload = onion['payload'][2:18] + '1' + onion['payload'][19:]
else:
newpayload = onion['payload'][:18] + '0' + onion['payload'][19:]
newpayload = onion['payload'][2:18] + '0' + onion['payload'][19:]
else:
newpayload = plugin.replace_payload
print("payload was:{}".format(onion['payload']))