A developer has tested a way to send Bitcoin-denominated Cashu tokens over Apple’s Find My network without putting the sending device online. The setup uses a small device that imitates the beacon of a lost AirTag and embeds Cashu token data into Bluetooth signals. Passing iPhones pick up those signals and relay them through Apple’s Find My network, allowing the data to move without a direct internet connection on the sender’s side.
On the receiving end, the recipient retrieves the relay reports through an Apple account and reconstructs the token step by step. The method is extremely low-bandwidth: each signal carries only two bits of data, so sending one typical token requires more than 1,000 broadcasts. The developer said the broadcast token is public and the transmission itself is not encrypted, which means the system should only be used for very small amounts. The project is currently a proof of concept rather than a finished payment product. Its code has been open-sourced on GitHub and runs on a low-cost ESP32 development board, according to Techub, citing BeInCrypto.
A developer has sent Bitcoin Cashu tokens through Apple’s Find My network in an experiment that kept the sending device offline, according to Techub News, citing BeInCrypto.
The setup used a small device that imitated the beacon of a lost AirTag and packed Cashu token data into Bluetooth signals. Nearby iPhones received those signals and relayed them through Apple’s Find My network, so the transmission could proceed without the sending device connecting to the internet.
Recipient rebuilds the token from relay reports
On the receiving side, the recipient accessed the relayed reports through an Apple account and reconstructed the token step by step.
One token needs more than 1,000 broadcasts
Each signal carried only two bits of data. That means a typical token required more than 1,000 broadcasts to complete the transfer.
Developer warns against sending anything but tiny amounts
The developer said the transmitted token is public and the transfer itself is not encrypted. For that reason, the method is recommended only for very small amounts.
Code is open-source and runs on ESP32
The work remains a proof of concept, not a mature payment product. The code has been open-sourced on GitHub and runs on a low-cost ESP32 development board.
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