When you want to move the assets from a single stealth address to another or you want unshield you asset (in other words withdraw from the arcane contract) you’d call the transferFrom function:
/**
* @notice Transfer a ETH/ERC20
* @dev Allows anyone to Withdraw and move their funds without needing
* them to interact with the contract. Also this function can be used to transfer
* funds from one stealth address to another
*
* Emits a {Transfer} event indicating the transfer
*
* Note: The _data parameter is used to call a callback function on the receiver
* Also, every parameter should be verified by this contract (using _verify) so as to prevent
* malicious contracts from stealing funds or mutating the parameters for personal gain.
*
* @param _token The token to transfer
* @param _sender The stealth address to transfer the token from
* @param _amount The amount of tokens to transfer
* @param _receiver The stealth address to transfer the token to
* @param _signature The signature of the sender
* @param _transferData Extra parameters for the withdrawal
* @param _announcementData The transfer announcement data
*/
function transferFrom(
address _token,
address _sender,
uint256 _amount,
address payable _receiver,
Signature calldata _signature,
TransferData calldata _transferData,
AnnouncementData calldata _announcementData
) external;
You’d notice the _signature paramater, this signature is generated using the stealth address private key. Keep in mind the _sender is some stealth address.
