Blockchain Testament

Blockchain Testament Case Study: Crypto Asset Inheritance Through Web3

Brief description

Web3 service for crypto asset inheritance

Task

Build a platform where the owner predefines heirs and shares, and asset transfer is triggered by a confirmed event through protected voting logic, a notary, or a quorum.

About the project

Blockchain Testament is a Web3 platform for creating and executing a digital will for crypto assets. The user defines inheritance rules in advance, and execution follows transparent on-chain logic via a smart contract: who receives the assets, in what shares, and under which conditions the transfer procedure starts.The core product idea: crypto asset inheritance without informal agreements and intermediaries, where rules are set in advance and cannot be changed retroactively.

Business benefits

•REDUCED RISK OF ASSET LOSS THANKS TO PREDEFINED HEIRS, SHARES, AND TRANSFER CONDITIONS IN THE SMART CONTRACT

•FEWER SITUATIONS WHERE CRYPTO ASSETS CANNOT BE TRANSFERRED TO ANYONE AFTER DEATH

Features

Core smart contract: will creation and parameters

•Creating a will from the user’s wallet — user address (msg.sender)

•Entering trustee and heir wallet addresses and percentage distribution for each

•List of currencies to transfer to heirs

•Quorum parameters required for fund distribution

•Enable/disable holding funds on the contract for X period after voting (boolean)

•Voting parameters: participant limits, fee settings, and recipient address

Heirs and distribution

•Specifying heir addresses

•Share distribution in percentages

•Logic for changing and editing the will from the creator’s account

•Heirs and trustees do not see the total amount of assets

Voting

•Ability to vote by will ID

•Quorum composition and conditions are set only by the will owner

Payouts

•Possible only after the quorum has passed

•Hold period before receiving funds according to regional legislation

Editing / changing the will

•Add validators, trustees, and heirs

•Remove validators, trustees, and heirs

•Change validators (% share), trustees (% share), quorum size, inherited tokens, DAO name

Event confirmation and procedure launch

•Requires specifying the insurance/will id; only a validator can start

•Notary checks related to death confirmation are added

•Adding a quorum of those who confirm the event

Storage and notifications

•Storage of will data

•Email for notifications

•Automation of payment/status control and user notifications

Subscriptions and tariffs

•A freemium model is built into the smart contract: some capabilities are free up to certain limits

•When limits are exceeded, paid mode is enabled

•Subscription options by period (1 month, 3 months (quarter), 6 months, 1 year)

•Lifetime subscription — a one-time payment instead of recurring charges

•Ability to pay for a lifetime subscription with BT tokens

Work with the client

*Important: this is not project work — it is work with the client specifically, and it is not in the estimate or commercial proposal. This is what we do to increase the probability of product success.A blockchain project lives in an environment where the legal landscape changes faster than code is written. We did not leave the client alone with this. Together we walked through the full user interaction chain — from onboarding to withdrawals — and highlighted points where compliance must be built in, not reactive. The outcome was not a lawyer’s conclusion “for signature,” but a real understanding by the business owner of their boundaries and room to maneuver within them.Our goal is not just development — it is our client’s success.