Add Two-Step Ownership Transfer & Admin Events #80
Description
Problem
The Chainvoice smart contract currently lacks proper ownership management features:
- No way to transfer ownership to a new owner
- No way to renounce ownership
- Admin functions (setFeeAmount, setTreasuryAddress) don't emit events for tracking changes
This is a critical governance and security issue. If the owner's private key is compromised or lost, there's no recovery mechanism.
Solution
Implement a two-step ownership transfer pattern with proper events.
Benefits:
- ✅ Two-step transfer prevents accidental transfers to wrong address
- ✅ Off-chain systems can track governance changes via events
- ✅ Follows OpenZeppelin best practices
- ✅ Fully backward compatible with existing code
Related
Addresses governance and security concerns for contract administration.