While the majority of existing smart contract platforms support trustless executions of arbitrary programs, they lack access to real-world data. This limitation hinders the potential of the applications that are developed on those platforms.

BandChain solves this important issue by connecting public blockchains to real-world, off-chain information. The project was created with the following design goals:

Speed and Scalability

The system must be able to serve a large quantity of data to multiple public blockchains with minimal latency, while maintaining a high throughput. The expected response time must be in the order of seconds.

Cross-Chain Compatibility

The system must be blockchain-agnostic and able to serve data to most publicly available blockchains. Verification of data authenticity on the target blockchains must be efficient and trustless by nature.

Data Flexibility

The system must be generic and able to support different methods of retrieiving and aggregating data, including both permissionless, publicly available data as well as information guarded by centralized parties.

BandChain achieves the aforementioned goals with a blockchain specifically built for off-chain data curation. The blockchain supports generic data requests and on-chain aggregation with WebAssembly-powered oracle scripts. Oracle results on BandChain blockchain can be sent across to other blockchains via the Inter-Blockchain Communication protocol (IBC) or through customized one-way bridges with minimal latency.