In Part 2, we’ll be using the API3 QRNG to get truly random numbers into our contract. - api3 smartcontracts
function, we’ll instantiate our contract again. We’ll call thefunction in our contract to trigger a random number request. This function emits an event that we can listen to for our request ID which we’ll use to listen for a response.to retrieve the winning random number for week 1!
const Lottery=await hre.deployments.get; const lotteryContract=new hre.ethers.Contract)[0] ); console.log; // Call function and use the tx receipt to parse the requestId const receipt=await lotteryContract.getWinningNumber, }); // Retrieve request ID from receipt const requestId=await new Promise=> hre.ethers.provider.once=> { const log=tx.logs.find=> log.address=== lotteryContract.address); const parsedLog=lotteryContract.interface.parseLog; resolve; }) ); console.
If we test this against our local chain, we should receive a request ID but no response. That’s because the ANU Airnode can’t access requests on our local chain.You can kill the request process after the request ID is printed.In this next step, we’ll be pointing Hardhat towards the Goerli testnet, which will provide a shared staging environment that mimics mainnet without using real money. This means we’ll need a wallet with some Goerli ETH funds on it.
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