This contract is a minimalistic and easy-to-use "two-sig" wallet. It has two or more owners and each action requires exactly two owners to sign.
Actions are:
- forward funds
- add owner
- remove owner
Usage:
- The proposal and subsequent confirmation by the second owner are two identical calls, just made from different sender addresses.
- Each action is identified by a unique nonce that can be arbitrarily chosen by the users. The two signers have to use the same nonce.
The contract is intentionally reduced to a minimal feature set:
- The signature "threshold" is not configurable, it is always 2.
- There is no handling of transaction payload (data), only pure value transfers.
Contract is deployed with
Duosign([addr1, addr2, addr3]).
User1 with addr1 issues forward(addr4, 10**18, 7) where 10**18 means 1 ether and 7 is an arbitrarily chosen nonce.
User1 sends the nonce to User2.
User2 with addr2 issues forward(addr4, 10**18, 7). The transaction gets executed only if all parameters match (destination address, value and nonce).