Similar to public data streams, consumers send a request to the VRF feed smart contract, and wait for it to generate a new VRF with the provided seed.
/**
* Request new randomness from another smart contract
*
* Network: Holesky
* Address: 0x12345....abcde
*/
function requestRandomness() {
vrfFeed = OpenOracleVRFFeed("0x12345....abcde");
vrfFeed.createNewTask(/* uint64 VRF seed */);
}
/**
* Reading latest randomness from another smart contract
*
* Network: Holesky
* Address: 0x12345....abcde
*/
function readLatestRandomness() {
vrfFeed = OpenOracleVRFFeed("0x12345....abcde");
(int answer) = vrfFeed.latestRoundData();
}
// Request new randomness from Javascript
const addr = "0x12345....abcde"
const vrfFeed = new web3.eth.Contract(OpenOracleVRFFeed, addr)
const vrfSeed = 123456789
const taskData = ethers.utils.solidityPack(["uint64"],[vrfSeed])
vrfFeed.methods
.createNewTask(taskData)
.call()
.then((requestData) => {
console.log("Request Hash:", requestData[0])
})
// Read latest data fetch from Javascript
const addr = "0x12345....abcde"
const vrfFeed = new web3.eth.Contract(OpenOracleVRFFeed, addr)
vrfFeed.methods
.latestRoundData()
.call()
.then((resultData) => {
console.log("Result:", BigInt(resultData[0]) % BigInt(2**32))
}
