I’d like to implement the following multisig smart contract:
2/3 multisig until time T
At time T the multisig becomes a 1/3
Any signer can increase T
I only want to store ETH for now, but ERC20 support would be a plus.
Would appreciate any code pointers!
Also open to philosophical feedback as to whether this is a good vault. I like it because the vault is not less secure than a standard 2/3 multisig as long as T is extended frequently. And if the owner loses 2 keys, they can recover the vault after T as long as nobody else knows any of the keys.
I could imagine EIP-4973 to be helpful here. Among themselves, the parties could “give” or “take” account-bound tokens" that signal membership over a shared account. A contract holding the funds could then be set up such that for withdrawing Ether, a quorum of ABT holders would have to accept the transfer. Additionally, it could be set up where any holder of the ABT may increase T.