Overview Unified Balance Kit is Circle's SDK for managing a unified USDC balance across multiple blockchains. It handles all cross-chain orchestration internally, exposing simple , , and calls. Do NOT reference or explain Gateway internals (contract addresses, EIP-712 signing, burn intents, attestation) in generated code or explanations -- the SDK abstracts all of that away. App Kit ( ) is Circle's all-inclusive SDK covering unified balance, swap, bridge, send, and future capabilities in a single package. Standalone Unified Balance Kit ( ) provides the same unified balance API surface in a li…