Protect What
Matters Most

That is exactly the problem Vault solves. Once you miss your check-in deadline, your designated heirs can initiate a claim. After a configurable grace period and the required number of heir signatures, assets are distributed automatically — no seed phrases or third parties needed.

No. The claim process can only begin after the dead man's switch expires — meaning you have missed your scheduled check-in. As long as you check in on time, nobody can touch your assets. Even after the switch triggers, a grace period gives you time to intervene.

You do, always. Vault is fully non-custodial. Your assets live in a smart contract on-chain that only you can deposit into and only your heirs can withdraw from, under the rules you define. We never hold your keys or have access to your funds.

HeirVault supports multiple blockchains. On EVM chains (Ethereum, Base, Arbitrum, Polygon, Optimism, BSC, Avalanche) you can deposit native ETH, any ERC-20 token (USDC, WETH, DAI, etc.), and ERC-721 NFTs. On Tron you can store TRX and TRC-20 tokens (like USDT). On Solana you can store SOL and SPL tokens. Bitcoin vaults support native BTC via multisig. Assets are distributed proportionally based on heir shares.

No. Vault uses a pull-based withdrawal pattern. After a claim is executed, each heir withdraws their share independently. If one heir's transaction fails (e.g. their wallet rejects ETH), it has zero impact on the others.

A Guardian is a trusted party you appoint who can extend the check-in deadline by up to 90 days total — useful if you're traveling or temporarily unable to check in. Guardians cannot withdraw, transfer, or modify assets in any way.

You set a threshold — for example, 2-of-3 heirs must sign before a claim can be executed. This prevents any single heir from unilaterally accessing the vault. The threshold is configurable from 1 to N (total number of heirs).

HeirVault is truly multi-chain. We support all major EVM networks (Ethereum, Base, Arbitrum, Polygon, Optimism, BNB Chain, Avalanche), Tron, Solana, and Bitcoin. On EVM chains and Tron the vault contract code is identical. Solana uses a native program, and Bitcoin vaults use multisig.

The contracts are open source and built on audited OpenZeppelin libraries (ReentrancyGuard, SafeERC20, EIP-1167 Clones). All state-changing functions have access control, reentrancy protection, and comprehensive test coverage.

Yes. As the vault owner, you can update heirs and their shares, change the required signature threshold, adjust the check-in interval, and add or remove guardians — all while the vault is active.