Multi-Signature Wallet

.. index:: wallet, multisig

Multi-Signature Wallet

---

.. _wallet:

.. warning::

This is example code for learning purposes. Do not use in production without thorough review and testing.

A multi-signature wallet requiring multiple owner approvals to execute transactions.

.. literalinclude:: ../../examples/wallet/wallet.vy :language: vyper :linenos:

Key concepts:

• Threshold signatures: Requires threshold out of 5 owners to approve
• Signature verification: Uses ecrecover to verify owner signatures
• Replay protection: seq counter prevents transaction replay
• Arbitrary calls: raw_call executes any transaction once approved

The approval process:

1. Owners sign a hash of (sequence number, destination, value, data)
2. Anyone can call approve() with the collected signatures
3. If enough valid signatures are provided, the transaction executes

.. note::

This demonstrates signature verification patterns. Production multisigs need additional safeguards like time locks and nonce management.