• In the aftermath of natural disasters or power outages, users may not have Internet access for a while.
• Thus, in this paper, we propose LNMesh which enables offline LN payments on top of wireless mesh networks.
• Users of a neighborhood or a community can establish a wireless mesh network to use it as an infrastructure to enable offline LN payments when they do not have any Internet connection.
• As such, we first present proof-of-concept implementations where we successfully perform offline LN payments utilizing Bluetooth Low Energy and WiFi.
• We then extensively tested the performance metrics of large-scale realistic offline LN payments on mobile wireless mesh networks.

Our simulation results show that, success rates up to 95% are achievable with the proposed channel assignment approaches when channels have enough liquidity