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keysend: just strip even unknown fields. #5645

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merged 1 commit into from
Oct 4, 2022

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rustyrussell
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We've had reports of keyends failing, and indeed:

plugin-keysend: Experimental: Accepting the keysend payment despite having unknown even TLV type 34349334.
02e19b96774811eedd1ba5b26350950a184a7a0530b118eb653b13d5a026c24ebe-chan#1: Failing HTLC because of an invalid payload

Sure, we've made accepting weird TLVs a non-experimental option, but surely it's better to only (and automatically!) accept them in the keysend plugin where the problem is?

Signed-off-by: Rusty Russell rusty@rustcorp.com.au
Changelog-Fixed: Plugins: keysend now removes unknown even (technically illegal!) fields, to try to accept more payments.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Fixed: Plugins: `keysend` now removes unknown even (technically illegal!) fields, to try to accept more payments.
@rustyrussell rustyrussell added this to the v22.11 milestone Oct 3, 2022
Comment on lines +272 to +273
* (Keysend is not a design, it's a kludge by people who
* didn't read the spec, and Just Made Something Work). */
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🤣

@cdecker
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cdecker commented Oct 4, 2022

Oh wow, this is heavy handed, but I get it. The odd-is-ok in TLV has been pretty much sidestepped by applications that didn't bother reading the how and why in the spec, and now we're getting punished for being spec-compliant... 😢

ACK 9459d22

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2 participants