Nunchuk Inheritance
Offline home for a Bitcoin inheritance plan
Turns Passport Prime into the offline plan-holder for a Nunchuk inheritance setup: your heir’s encrypted recovery guide, a dead-man’s-switch, and a claim kit, all on the device.
Active plan · check-in timer
Overview
Inheritance is the biggest unsolved problem in self-custody: large sums are lost when holders die or are incapacitated without a plan, and the tooling that exists is aimed at the wealthy. This proof of concept makes Passport Prime the offline plan-holder for a Nunchuk inheritance setup: Nunchuk remains the online wallet that coordinates the multisig, and Passport is the offline vault your family inherits.
An early experiment from the marketing side, and a real KeyOS app (Rust + Slint) that builds and runs in the simulator today. The screen shown here is a representative mockup; on-hardware testing follows once the beta SDK lands.
What it does
- Scan an existing Nunchuk multisig wallet: Passport recognises itself as one of the keys.
- Store an encrypted message and a step-by-step recovery guide for your heir, on the device.
- A dead-man’s-switch check-in timer: keep checking in, or it flips to “recovery available”.
- Export a recovery kit your heir uses to claim through Nunchuk.
- Positions Passport as the offline signer and plan-holder alongside Nunchuk, not a competitor.
Technical breakdown
How the proof-of-concept is built, for developers evaluating the platform.
Passport as the plan-holder
Nunchuk remains the online coordinator that builds the multisig and broadcasts; Passport Prime holds one key plus the inheritance plan: the encrypted heir message, the recovery guide, and the dead-man’s-switch state, all held entirely offline.
Status
A work in progress. It builds and runs in the KeyOS simulator today; the on-device flows and the recovery-kit format will be documented as it moves onto real hardware.
Dig into the source
By Amy. Shared in the team’s Passport vibecoded-apps group; not yet in a public repo.