[Lightning-dev] Atomic swap
Rusty Russell
rusty at rustcorp.com.au
Mon Sep 14 18:46:10 UTC 2015
Pierre <pm+lists at acinq.fr> writes:
> Hello there,
>
> I've been thinking about how we could implement the idea some brilliant
> people had here :
> https://bitcointalk.org/index.php?topic=1134319.msg11966748#msg11966748.
Yes!
Caveats:
1) We still need some way of adding another anchor to a channel, since
the atomic swap can't increase channel *capacity*.
2) This is a routing question :)
So, they're normal HTLCs, but the "next hop" is not "lightning node X"
but "bitcoin address X".
No protocol changes required, except the FIXME here:
// Start a new commitment tx to add an HTLC me -> you.
message update_add_htlc {
// Hash for which I will supply preimage to revoke this commitment tx.
required sha256_hash revocation_hash = 1;
// Amount for htlc
required uint32 amount = 2;
// Hash for HTLC R value.
required sha256_hash r_hash = 3;
// Time at which HTLC expires (absolute)
required locktime expiry = 4;
// FIXME: Routing information.
}
:)
Cheers,
Rusty.
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