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41 lines
1.3 KiB
Python
Executable File
41 lines
1.3 KiB
Python
Executable File
#!/usr/bin/env python3
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"""Plugin that replaces HTLC payloads.
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This feature is important if we want to accept an HTLC tlv field not
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accepted by lightningd.
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"""
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from pyln.client import Plugin
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plugin = Plugin()
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@plugin.hook("htlc_accepted")
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def on_htlc_accepted(htlc, onion, plugin, **kwargs):
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# eg. '2902017b04016d0821fff5b6bd5018c8731aa0496c3698ef49f132ef9a3000c94436f4957e79a2f8827b'
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# (but values change depending on pay's randomness!)
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print("payload was:{}".format(onion['payload']))
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assert onion['payload'][0:2] == '29'
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if plugin.replace_payload == 'corrupt_secret':
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# Note: we don't include length prefix in returned payload, since it doesn't
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# support the pre-TLV legacy form.
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if onion['payload'][18] == '0':
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newpayload = onion['payload'][2:18] + '1' + onion['payload'][19:]
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else:
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newpayload = onion['payload'][2:18] + '0' + onion['payload'][19:]
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else:
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newpayload = plugin.replace_payload
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print("payload was:{}".format(onion['payload']))
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print("payload now:{}".format(newpayload))
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return {'result': 'continue', 'payload': newpayload}
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@plugin.method('setpayload')
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def setpayload(plugin, payload: bytes):
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plugin.replace_payload = payload
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return {}
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plugin.run()
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