User Functions

register(address backupAddress, uint256 inactivityPeriod) external payable

Creates a vault for the caller. The caller's address becomes the protected wallet. Registration with a zero balance is valid — ETH can be deposited later. If the caller previously had an abandoned vault with a remaining balance, that balance is automatically carried into the new vault.

deposit() external payable

Adds ETH to the caller's existing vault. The vault must already be registered. Resets the inactivity timer.

send(address to, uint256 amount) external

Sends ETH from the caller's vault to any Ethereum address. The vault balance decreases by the sent amount. Resets the inactivity timer. Follows the CEI pattern — balance is updated before the external ETH call.

withdrawAll() external

Transfers the caller's entire vault balance back to their own wallet. The vault remains active and registered after withdrawal — the user can deposit again at any time. To fully deregister, use cancelRecovery() instead. Resets the inactivity timer.

ping() external

Resets the inactivity timer without moving any funds or changing any settings. Use this to signal liveness when you are not planning to transact but your inactivity period is approaching.

updateBackupAddress(address newBackupAddress) external

Changes the backup address on the caller's vault. The new address must not be zero, the caller's own address, or a permanently blocked address. Resets the inactivity timer.

updateInactivityPeriod(uint256 newPeriod) external

Changes the inactivity period on the caller's vault. The new period must fall within the enforced minimum and maximum bounds. Resets the inactivity timer.

cancelRecovery() external

Withdraws all ETH and permanently removes the vault from monitoring in one transaction. The caller is deregistered. Re-registration is allowed after cancellation. If the vault has zero balance, deregistration still completes with no ETH transfer.