api-reference.md

# API Reference ## Index #### Constructors | | Description | | ------------ | ------------------------- | | Constructors | Oracle vrf initialization | #### Functions | | Description | | ----------------- | ------------------------------------------------------------- | | randomnessRequest | Make a request to generate random numbers | | fulfillRandomness | VRF Oracle will call back when receiving valid VRF proof data | ## Constructors ``` constructor (address _oraiToken, address _oracle) public { fee = 1000000000000000000; orai = _oraiToken; oracle = _oracle; } ``` ## Funtions #### randomnessRequest ``` function randomnessRequest(uint256 _seed, bytes memory _data) public returns (bytes32 reqId); ``` * \_seed : a random number provided by the caller * \_data : the result of callbackAddress and callbackFunc after encoding ``` bytes memory data = abi.encode(address(this), this.fulfillRandomness.selector); ``` * callbackAddress: smart contract address receive random number * callbackFunct : hen a function is called, the first 4 bytes of `calldata` specifies which function to call. #### fulfillRandomness ``` function fulfillRandomness(bytes32 reqId, bytes calldata _data, uint8 v, bytes32 r, bytes32 s) external; ``` * reqId: request id generated when calling function randomnessRequest * \_data: includes callbackAddress and callbackFunc after encode * v,r,s: proof vrf