Bridge oracle consists of three different smart contracts that interact with each other. One of the contracts is the Bridge API contract, which the client's smart contract should inherit from in order to connect to Bridge oracle and access its services. The second contract is the Bridge oracle address resolver, which redirects clients' requests to the appropriate service, such as the public oracle system, decentralized oracle system, or a specific enterprise oracle system. The last contract is the Bridge oracle connector, which receives the client's request, processes it as a query, and emits specific data that can be read by oracle data carriers. It is worth noting that the interaction between Bridge's smart contracts is designed to allow for upgrading the oracle system to a higher version with additional features without causing any disruption to previous users' contracts.