Approval management

Recommended pattern:

1. Before using UPM, approve specific amountWBTC.approve(address(upm), amountNeeded);​

2. Execute operation via UPMupm.doCall(target, data);​

3. (Optional) Revoke approval after useWBTC.approve(address(upm), 0); Alternative: Max approval (convenience vs risk): WBTC.approve(address(upm), type(uint256).max);

Risk comparison:

Exact Amount	Low	Cumbersome	One-time users
Limited (e.g., 1 BTC)	Medium	Balanced	Regular users
Max (uint256.max)	High	Seamless	Power users, trusted protocols