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💀 Memento Mori

💀 Memento Mori

Pass on crypto with on-chain trusts

Created on 22nd June 2025

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💀 Memento Mori

💀 Memento Mori

Pass on crypto with on-chain trusts

The problem 💀 Memento Mori solves

💀 Memento Mori

What happens to your crypto when you die?

It’s tough to think about death, but it’s essential to plan for your future.

Thats why were building Memento Mori: a concept in philosophy - a reminder that we’re all mortal, and will die.

Existing will and recovery options in crypto are flawed:

  • Require using a centralized intermediary to send crypto to your heirs
  • Split your private keys across multiple people: creates a stalemate where heirs are incentivized to not share their part of the private key before another

We need a system that is structured like traditional trusts: something proven for nearly a thousand years.

  • If person found still alive, ownership is kept
    • Funds not transferred to heirs, rather held in the trust
  • Person can configure how trust is used - not blindly giving money to hairs
    • ZK verification of what funds are used on
    • timed release of funds (like standard trust)

How it Works

  1. Trust funder creates trust
    • Submit information on beneficiary (name, password, how funds should be used, when can be claimed, proof of death requirement, etc) (⭐️ Name + PW are proofs w Hyli)
  2. Trust funder shares trust link with Beneficiary
    • Beneficiary should keep trust link and secret password somewhere safe
  3. Upon death, Beneficiary can claim funds
    • Log in w ZK Passport, verify identity (⭐️ using ZK Passport + Hyli)
    • Verify secret password (⭐️ compaired w prior proof w Hyli)
    • Can submit proof of death
    • Can then withdraw funds if all conditions met

Sponsors

  • Hyli
  • ZKPassport

Features

  • Trust fund setup with funds stored in the smart contract and custom set of programmable instructions for the will
  • Initiating social recovery using:
    • ZKPassport proofs to verify Beneficiary is who they say
    • Secret password previously generated by trust creator and given to the trust beneficiary on Hyli, Beneficiary name also stored in hash, compared with ZK Passport identity to authenticate beneficiary

Challenges I ran into

Devfolio

  • We could not add my team member Daniel!!! We are two people working on this project.

Hyli

  • Some issues w setting things up on M1/M2 chip computers. Team was able to resolve promptly.
  • Testnet down. We were trying to deploy but had issues for some time. In end was not required to deploy there - could have been better communicated from team.
  • Testnet requires invite code for users - wasn't communicated well.

ZK Passport <> Hyli

  • They use different proof types. Made using both together complex.

Tracks Applied (4)

ZK Hack Berlin Winners

Memento Mori solves a real but ignored problem in crypto: What happens to your assets when you die? Most solutions toda...Read More

Private Identity Verification

We use ZK Passport to verify the identity of trust beneficiaries before they are able to claim funds. This is compared t...Read More

ZKPassport

Deploy an application on the Hyli testnet

Deploy on Hyli: We have main two proofs on Hyli: secret password and name verification - these are used when verifying t...Read More

Hyli

Consumer ZK Apps

We built an app for a mainstream consumer use case!

Xion

Technologies used

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Discussion

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