API Reference

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API Reference

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Constructors
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Description
Constructors
Oracle vrf initialization
Functions
Text
Description
randomnessRequest
Make a request to generate random numbers
fulfillRandomness
VRF Oracle will call back when receiving valid VRF proof data
Constructors
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constructor (address _oraiToken, address _oracle) public {
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    fee = 1000000000000000000;
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    orai = _oraiToken;
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    oracle = _oracle;
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}
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randomnessRequest
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function randomnessRequest(uint256 _seed, bytes memory _data) public returns (bytes32 reqId);
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_seed : a random number provided by the caller
_data : the result of callbackAddress and callbackFunc after encoding
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bytes memory data = abi.encode(address(this), this.fulfillRandomness.selector);
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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
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function fulfillRandomness(bytes32 reqId, bytes calldata _data, uint8 v, bytes32 r, bytes32 s) external;
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reqId: request id generated when calling function randomnessRequest
_data: includes callbackAddress and callbackFunc after encode
v,r,s: proof vrf

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