cannot estimate gas

[sako013]

Hey awesome Guys!
I deployed to Rinkeby Testnet
I have REPORT_GAS = true in .env

when i run
yarn run hardhat request-random-number --contract 0x23B0E720BD0797B81E212A584FF9F14cCD6a7400 --network rinkeby

it gives me this error
Error: cannot estimate gas; transaction may fail or may require manual gas limit (error={"name":"ProviderError","code":3,"_isProviderError":true,"data":"0xf0019fe6000000000000000000000000000000000000000000000000000000000000126400000000000000000000000023b0e720bd0797b81e212a584ff9f14ccd6a7400"}, method="estimateGas", transaction={"from":"0xb6D5007552914686fe20d9c18286f47f2A3A849a","to":"0x23B0E720BD0797B81E212A584FF9F14cCD6a7400","data":"0xe0c86289","accessList":null}, code=UNPREDICTABLE_GAS_LIMIT, version=providers/5.5.3)

[sako013]

I tried using Moralis_RPC_URL and Alchemy_RPC_URL

[sako013]

[sako013]

How can I manually set the gas price in a transaction?
guys please help !!

[sako013]

FIXED
After Checking Readme.md ,I figured it out that you need to manually add the Deployed Contract Address to https://vrf.chain.link/rinkeby as a new consumer !!!

[andrejrakic]

Hi @sako013, pardon me for the late reply. As you already mentioned one needs to add a new consumer at Subscription Management Page.

However, if you want to avoid this extra step you can expand the deployment script with the following code:

import VRF_COORDINATOR_V2_ABI from "@chainlink/contracts/abi/v0.8/VRFCoordinatorV2.json";
import { Contract } from "ethers";

const deployFunction: DeployFunction = async ({ getNamedAccounts, deployments }) => {
    //
    //
    //
    
    if(!developmentChains.includes(network.name) {
        const vrfCoordinatorV2 = new Contract(vrfCoordinatorAddress, VRF_COORDINATOR_V2_ABI, deployer);
        const tx: ContractTransaction = await vrfCoordinatorV2.addConsumer(subscriptionId, randomNumberConsumerV2.address);
        await tx.wait(waitBlockConfirmations);
    }
    
    //
    //
    //
}

[TravisLeeRichardson]

I'm getting this same error but on Sepolia. I verified I've added the consumer correctly. But this is what I get:

tr@pop-os:~/Desktop/hardhat-starter-kit$ npx hardhat request-random-number --contract 0x8103b0a8a00be2ddc778e6e7eaa21791cd364625 --network sepolia

Requesting a random number using VRF consumer contract 0x8103b0a8a00be2ddc778e6e7eaa21791cd364625 on network sepolia
An unexpected error occurred:

Error: cannot estimate gas; transaction may fail or may require manual gas limit [ See: https://links.ethers.org/v5-errors-UNPREDICTABLE_GAS_LIMIT ] (reason="execution reverted", method="estimateGas", transaction={"from":"0xb5b06eABE206b3D9Aa96229341e2e775520C3D27","to":"0x8103B0A8A00be2DDC778e6e7eaa21791Cd364625","data":"0xe0c86289","accessList":null}, error={"name":"ProviderError","_stack":"ProviderError: HttpProviderError\n at HttpProvider.request (/home/tr/Desktop/hardhat-starter-kit/node_modules/hardhat/src/internal/core/providers/http.ts:78:19)\n at LocalAccountsProvider.request (/home/tr/Desktop/hardhat-starter-kit/node_modules/hardhat/src/internal/core/providers/accounts.ts:187:34)\n at processTicksAndRejections (node:internal/process/task_queues:95:5)\n at EthersProviderWrapper.send (/home/tr/Desktop/hardhat-starter-kit/node_modules/@nomiclabs/hardhat-ethers/src/internal/ethers-provider-wrapper.ts:13:20)","code":-32000,"_isProviderError":true}, code=UNPREDICTABLE_GAS_LIMIT, version=providers/5.7.2)
at Logger.makeError (/home/tr/Desktop/hardhat-starter-kit/node_modules/@ethersproject/logger/src.ts/index.ts:269:28)
at Logger.throwError (/home/tr/Desktop/hardhat-starter-kit/node_modules/@ethersproject/logger/src.ts/index.ts:281:20)
at checkError (/home/tr/Desktop/hardhat-starter-kit/node_modules/@ethersproject/providers/src.ts/json-rpc-provider.ts:78:20)
at EthersProviderWrapper. (/home/tr/Desktop/hardhat-starter-kit/node_modules/@ethersproject/providers/src.ts/json-rpc-provider.ts:642:20)
at step (/home/tr/Desktop/hardhat-starter-kit/node_modules/@ethersproject/providers/lib/json-rpc-provider.js:48:23)
at Object.throw (/home/tr/Desktop/hardhat-starter-kit/node_modules/@ethersproject/providers/lib/json-rpc-provider.js:29:53)
at rejected (/home/tr/Desktop/hardhat-starter-kit/node_modules/@ethersproject/providers/lib/json-rpc-provider.js:21:65)
at processTicksAndRejections (node:internal/process/task_queues:95:5) {
reason: 'execution reverted',
code: 'UNPREDICTABLE_GAS_LIMIT',
method: 'estimateGas',
transaction: {
from: '0xb5b06eABE206b3D9Aa96229341e2e775520C3D27',
to: '0x8103B0A8A00be2DDC778e6e7eaa21791Cd364625',
data: '0xe0c86289',
accessList: null
},
error: ProviderError: HttpProviderError
at HttpProvider.request (/home/tr/Desktop/hardhat-starter-kit/node_modules/hardhat/src/internal/core/providers/http.ts:78:19)
at LocalAccountsProvider.request (/home/tr/Desktop/hardhat-starter-kit/node_modules/hardhat/src/internal/core/providers/accounts.ts:187:34)
at processTicksAndRejections (node:internal/process/task_queues:95:5)
at EthersProviderWrapper.send (/home/tr/Desktop/hardhat-starter-kit/node_modules/@nomiclabs/hardhat-ethers/src/internal/ethers-provider-wrapper.ts:13:20)