[Lightning-dev] Lightning in the setting of blockchain hardforks

Martin Schwarz martin.schwarz at gmail.com
Thu Aug 17 08:53:22 UTC 2017

Dear all,

currently the chain_id allows to distinguish blockchains by the hash of
their genesis block.

With hardforks branching off of the Bitcoin blockchain, how can Lightning
work on (or across)
distinct, permanent forks of a parent blockchain that share the same
genesis block?

I suppose changing the definition of chain_id to the hash of the first
block of the new
branch and requiring replay and wipe-out protection should be sufficient.
But can we
relax these requirements? Are slow block times an issue? Can we use
Lightning to transact
on "almost frozen" block chains suffering from a sudden loss of hashpower?

Has there been any previous discussion or study of Lightning in the setting
of hardforks?
(Is this the right place to discuss this? If not, where would be the right

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