[Lightning-dev] Barrier Escrow (Was: Re: A Payment Point Feature Family (MultiSig, DLC, Escrow, ...))

[ZmnSCPxj]

Good morning Nadav, and list,

Resurrecting this very old thread, but I have been thinking of barrier escrows again lately.

The mitigation in https://lists.linuxfoundation.org/pipermail/lightning-dev/2019-October/002215.html does not work, because one of the participants can always just create a single payment of the entire amount with its own generated `Z`, and the barrier escrow would be unable to differentiate this from the case where it "should" have gotten the payment from multiple participants.
Additional checks can be done to prevent this, but this moves the trust requirement to the barrier escrow.

Regards,
ZmnSCPxj