How does eCash pay a Lightning invoice that is somehow different from using sats locked in a Lightning channel?
Moreover, what mechanism is there to keep a regular Lightning wallet custodian from issuing more IOUs than they have sats to back them?
Answers:
eCash wallets use Lightning channels to pay Lightning invoices. Just like every other custodian.
Lightning custodians can also arbitrarily issue more IOUs than they have actual sats to back them up, just like eCash wallets can.
Thise supposed differences of yours are not differences whatsoever.
