Add support for arbitrary length onion errors#2441
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The specification recommends using a length of 256 for onion errors, but it doesn't say that we should reject errors that use a different length. We may want to start creating errors with a bigger length than 256 if we need to transmit more data to the sender. In order to prepare for this, we keep creating 256-bytes onion errors, but allow receiving errors of arbitrary length. See the specification here: lightning/bolts#1021 Fixes #2438
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Nov 4, 2022
eclair-core/src/main/scala/fr/acinq/eclair/wire/protocol/FailureMessage.scala
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eclair-core/src/test/scala/fr/acinq/eclair/channel/states/e/NormalStateSpec.scala
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The specification recommends using a length of 256 for onion errors, but it doesn't say that we should reject errors that use a different length.
We may want to start creating errors with a bigger length than 256 if we need to transmit more data to the sender. In order to prepare for this, we keep creating 256-bytes onion errors, but allow receiving errors of arbitrary length.
See the specification here: lightning/bolts#1021
Fixes #2438