BitSend
BitSend. Money that works when nothing else does.
Demo
About
The problem it solves **Payments have one fatal flaw – they require the internet.** There are **2.2 billion people** without access to the internet. In conflict zones like Iran, the entire network goes dark overnight. 185 million transactions were lost overnight. People cannot pay for their food. Not because they cannot afford it, but because they cannot access the network. Each app has the same problem. No internet, no payment. **BitSend solves the problem** A **hybrid offline crypto payment app**. No internet required. - Load funds online → stored as secure offline token - Send via **Hotspot , QR code and Bluetooth** - Settles on-chain via **BitGo** when the internet is available - Built on **Base**: fast, cheap, ethereum-grade security - Send to **ENS names**, rather than long wallet addresses - Tamper-proof PDF receipts stored via **Fileverse** Our **Backed Wallet** ensures double-spending is impossible. **Money that works when nothing else does.**
How it's made
Challenges we ran into ## The core challenge The biggest challenge wasn't making the single transaction work; the challenge was making the **entire offline payment process dependably work**. Not only do we need to coordinate wallet state, chain selection, transport mode, and offline behavior, we need to do this simultaneously. This was actually causing real issues in the early days: the UI would incorrectly indicate readiness, the wallet might appear funded and ready for handoff but not really be ready for handoff, or the transaction might fail silently after the user changed networks or transport modes. I made significant architectural changes to address these issues: I centralized logic around clear **state boundaries**, splitting **"prepare while online" from "sign and hand off offline"**, and ensuring the UI clearly presents the user with the status and recovery options rather than allowing them to proceed in an invalid state.