📄Remix FHE Demo Local Deployment Tutorial- Contracts Explanation&Interaction

Explanation of Key Components

1. CombinedContract.sol Overview:

• This file contains utility contracts, libraries, and a core Oracle contract that facilitates request handling, encryption, and decryption operations using CapsulatedValue.

• Ownable Contracts: Ownable and Ownable2Step contracts provide ownership control, ensuring that only the owner can execute certain functions.

• Types and Operations: The Types and Opcode libraries define custom types and supported operations for fully homomorphic encryption (FHE) computations.

2. Example.sol Overview:

• Oracle Interaction: The Example contract interacts with the Oracle contract to perform secure computations. It uses the RequestBuilder library to create and send requests to the Oracle.

• Events: Various events, such as RequestSent, TargetUpdated, and DebugLog, are emitted to provide transparency in operations.

• Functions:

• createRandomTarget(): Generates a random target value using the Oracle.

• randomTargetCallback(): Handles the Oracle’s response and updates the target value.

• makeComputation(uint64 amount): Performs a computation on the target and an input amount, then sends a request to the Oracle.

• computationCallback(): Processes the result of the computation and updates the target.

Interacting with the Contracts

1. Generate a Random Target:

• After deploying Example.sol, use the createRandomTarget() function. This will generate a random target value using the Oracle.

• Check the Remix console for emitted events and debug logs.

2. Perform a Computation:

• Call makeComputation(uint64 amount) with a specific amount to add to the target.

• The Oracle will process the computation, and the result will be available in the computationCallback().

3. View Target Value:

• Use the getTarget() function to view the current target value.