What changed in the latest USDC upgrade?

Show me the differences between the last two versions of this contract

Compare all historical versions of this upgradeable contract

Show me what changed in the latest upgrade of the Aave V3 Pool

Show all changes this contract has gone through since deployment

// File: LendingPool.sol

- function deposit(address asset, uint256 amount) external {
+ function deposit(address asset, uint256 amount, address onBehalfOf) external {
      // Added ability to deposit on behalf of another address

-     _deposit(asset, amount, msg.sender);
+     _deposit(asset, amount, onBehalfOf);
  }

+ // New function added in v2
+ function flashLoan(
+     address receiver,
+     address[] calldata assets,
+     uint256[] calldata amounts,
+     bytes calldata params
+ ) external {
+     // Flash loan implementation
+ }

Changes in v2.0 → v2.1:
- Modified: deposit() - added onBehalfOf parameter
- Added: flashLoan() - new flash loan functionality
- Modified: withdraw() - added safety checks
- Removed: emergencyWithdraw() - deprecated function

USDC Implementation Upgrade Analysis
====================================

Previous: 0xabcd... (deployed Jan 2023)
Current:  0x1234... (deployed June 2023)

Key Changes:

1. Gas Optimizations
   - Simplified internal transfer logic
   - Reduced storage reads in balanceOf

2. New Features
   - Added permit() for gasless approvals (EIP-2612)
   - Added receiveWithAuthorization() for meta-transactions

3. Security Updates
   - Added additional checks in blacklist functions
   - Updated access control modifiers

4. Removed
   - Deprecated legacy migration functions

Assessment: Standard maintenance upgrade with gas
optimizations and new signature-based approval features.