m.key.verification.accept should not have a 'method' field

[uhoreg]

probably a copy-and-paste error. It wasn't in the original MSC, and doesn't really make sense to be there since the method is already determined at that point.

[Dominaezzz]

Related matrix-org/matrix-js-sdk#1390 and element-hq/element-android#1433 . Seems to be ignored anyway.

If it makes a difference, I think the method field can help with polymorphic serialization in strongly typed languages.

[Dominaezzz]

Does this mean m.sas.v1 is going to be the only type of verification ever?

EDIT: Or rather, the only kind of verification you can accept?

[uhoreg]

Currently, m.sas.v1 is the only method that uses the m.key.verification.accept event. In theory, other methods might in the future, but there are currently no plans for any other methods. The method is already specified in the m.key.verification.start message, so it's not needed in m.key.verification.accept, because the m.key.verification.accept is already linked to the m.key.verification.start.