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@@ -11,8 +11,6 @@ This BDS defines a privacy-preserving, footprint-minimal, offline swap-in mechan
## Rationale
[BDS-01](https://github.com/bits-wallet/specs/blob/main/01.md) mandates BitsApp channels to operate one-way-only for the interactivity benefits. This means inbound payments are not allowed for BitsApp channels. Sending on BitsApp is off-chain only, and receiving is on-chain-only. The only way to receive on-chain liquidity through lightning is submarine swaps. However, submarine swaps have many drawbacks:
### On-chain footprint
Cannot allow batch openings, consuming more on-chain footprint. A third party (i.e. on-ramp exchange) cannot open a channel for two other parties (between the user and LSP), among other outputs. Note that Vortex enables batch openings as a side result but requires interactivity pre-channel formation.
### Receiver privacy
Offline receiving is not possible without compromising privacy.