Multi-Sig Wallet Implementation

## ROLE
You are a smart contract security engineer who has built multi-signature wallets protecting billions in protocol treasuries. You understand the operational security requirements of teams managing on-chain assets.

## OBJECTIVE
Implement a multi-signature wallet for [ORGANIZATION/DAO] requiring [M]-of-[N] signatures to execute transactions, with support for [FEATURES: batch transactions, token management, DeFi interactions].

## TASK

### Core Multi-Sig Mechanics
- Owner management: add, remove, and swap owners with threshold adjustment
- Threshold configuration: M-of-N where M and N are independently adjustable
- Transaction submission: any owner can propose a transaction
- Confirmation collection: owners approve proposed transactions with their signature
- Execution: any owner can trigger execution once threshold is reached
- Revocation: owners can revoke their confirmation before execution

### Transaction Types
- ETH transfers: simple value transfers to any address
- Contract interactions: arbitrary calldata execution for DeFi protocol interaction
- Batch transactions: multiple operations bundled in a single approval flow
- Delegate calls: execute code in the wallet's context (dangerous — restricted)
- Module transactions: pre-approved recurring operations without full approval flow

### Signature Schemes
- On-chain confirmation: owners submit approval transactions individually
- Off-chain signatures: EIP-712 typed signatures collected off-chain, submitted in batch
- Hybrid: mix of on-chain and off-chain signatures for flexibility
- Hardware wallet compatibility: ensure signatures are compatible with Ledger, Trezor
- Smart contract signatures: EIP-1271 for owners that are smart contracts (other multi-sigs, DAOs)

### Security Features
- Nonce management: sequential nonces preventing transaction replay and reordering
- Guard contracts: pre-execution and post-execution checks (spending limits, allowlists)
- Timelock: mandatory delay between approval and execution for high-value transactions
- Daily spending limits: transactions below threshold execute without full approval
- Emergency freeze: single-owner ability to freeze all pending transactions
- Recovery mechanism: social recovery if owners lose access to their keys

### Operational Features
- Transaction queue: ordered list of pending transactions with status tracking
- Labels and categories: on-chain or off-chain metadata for transaction organization
- Recurring approvals: pre-approve specific contract interactions (staking, claiming)
- Gas management: refund gas costs to the executing owner from wallet balance
- Notification system: events structured for off-chain monitoring and alerting

### Integration Layer
- Safe-compatible: follow Gnosis Safe interface standards for ecosystem compatibility
- WalletConnect: enable DApp interaction through WalletConnect protocol
- Token standards: ERC-20, ERC-721, ERC-1155 receiving and management
- DeFi modules: pre-built modules for common DeFi operations (swap, stake, lend)
- Frontend SDK: JavaScript library for building custom multi-sig interfaces

## OUTPUT FORMAT
Complete multi-sig wallet contract with core logic, guard modules, deployment script, and operational guide.

## CONSTRAINTS
- Must handle the case where an owner's key is compromised (emergency owner rotation)
- Gas cost for execution must not scale linearly with number of owners
- All owner changes must require the same threshold as regular transactions
- Include comprehensive event logging for audit trail
- Contract must be non-upgradeable (or upgradeable only through owner consensus)