SRC CO released Multisig, a self-custody wallet protocol built around a timelocked multisig vault, live at multisig.software after roughly four months in public beta. The protocol combines a standard multisig threshold-signing scheme with a smart contract-enforced delay on every transaction, queuing approved transactions before they execute rather than settling them immediately.

Two mechanisms sit on top of the delay. A cancel path needs only a threshold of signers and executes immediately, serving as the primary safeguard against a bad transaction. A separate fast path lets a transaction execute right away if every owner signs off unanimously, skipping the remaining delay for routine payments where there's no disagreement to protect against. Owners can authorize either by signing off-chain or by registering approval on-chain, the latter needed for DAOs and contracts that can't produce signatures.

The protocol deploys with the same address across five chains, including Ethereum, Optimism, Base, Arbitrum, and MegaETH. It also resolves owner and spending addresses through ENS as well as two newer namespaces, wei.domains and gwei.domains. Because it's built as an EIP-7702 delegation system, an ordinary externally-owned account can delegate into the protocol and operate as a smart contract wallet from the same address, which SRC CO says also allows an agent to share authorization with a human owner and batch transactions.

SRC CO says it runs its own operations on the protocol and is positioning Multisig for personal self-custody, DAO treasuries, and DeFi teams, with a cloning tool for migrating existing Gnosis Safe configurations. The open source code is now live at github.com/src-company/multisig.

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