ckBTC Integration

The codebase represents a legitimate ckBTC integration pattern with clear, IC-native canister interactions between a ledger and a minter. There are no evident malicious behaviors, credential exfiltration, or external data sinks. The primary risks are operational: correct subaccount derivation, correct handling of the 10 satoshi fee, and ensuring the minter/ledger responses are properly checked to avoid misbehavior or race-condition issues. Given the explicit use of mainnet canister IDs and cross-canister calls, the footprint aligns with the stated purpose of ckBTC integration, not a covert supply-chain attack. Treat as benign with medium operational risk due to integration complexity and potential minter behavior changes.