Gas estimation failed: 'invalid opcode: opcode 0xfe not defined'.

[Sudhanmanoharan]

Hi @PatrickAlphaC,
I'm facing one issue in the NFT application while trying to run in the Rinkeby network. Can you plz help me?
Gas estimation failed: 'invalid opcode: opcode 0xfe not defined'. This transaction will likely revert. If you wish to broadcast, you must set the gas limit manually.

Let me attach the screenshot.

[Sudhanmanoharan]

Hi @PatrickAlphaC, can I get any update on the above error?.

Thanks,
Sudhan

[PatrickAlphaC]

Thanks for making this issue. Do you have testnet LINK token? Can you send me an etherscan link to the transaction?

[Sudhanmanoharan]

Thanks for the reply.

Rinkeby LINK

rinkeby:
    eth_usd_price_feed: "0x8A753747A1Fa494EC906cE90E9f37563A8AF630e"
    vrf_coordinator: "0xb3dCcb4Cf7a26f6cf6B120Cf5A73875B7BBc655B"
    link_token: "0x01BE23585060835E02B77ef475b0Cc51aA1e0709"
    keyhash: "0x2ed0feb3e7fd2022120aa84fab1945545a9f2ffc9076fd6156fa96eaff4c1311"
    fee: 1000000000000000000
    verify: False

---

Etherscan Transaction Address
[0x37988282462B1fb803Fad6FEbB5Bbe1Bd4Ccf104]

Stack Trace

macs-MacBook-Pro:NFT Sudhan$ brownie run scripts/deploy.py --network rinkeby
Brownie v1.16.3 - Python development framework for Ethereum

NftProject is the active project.

Running 'scripts/deploy.py::main'...
Transaction sent: 0xf45332724f4dda2c9688a324efc4c64ba5068c228658e15eb52aa100ab89d744
Gas price: 1.000000018 gwei Gas limit: 2441351 Nonce: 109
AdvanceCollectable.constructor confirmed Block: 9369341 Gas used: 2219410 (90.91%)
AdvanceCollectable deployed at: 0x37988282462B1fb803Fad6FEbB5Bbe1Bd4Ccf104

Transaction sent: 0x2d8b08ba8176ed762f04d41ba56b3597bea4a01a4cb8fd262f4a82e67671afb1
Gas price: 1.000000017 gwei Gas limit: 56992 Nonce: 110
LinkToken.transfer confirmed Block: 9369342 Gas used: 51811 (90.91%)

LinkToken.transfer confirmed Block: 9369342 Gas used: 51811 (90.91%)

Funded 0x37988282462B1fb803Fad6FEbB5Bbe1Bd4Ccf104
File "brownie/_cli/run.py", line 49, in main
return_value, frame = run(
File "brownie/project/scripts.py", line 103, in run
return_value = f_locals[method_name](*args, **kwargs)
File "./scripts/deploy.py", line 22, in main
deploy_advance_contract()
File "./scripts/deploy.py", line 16, in deploy_advance_contract
create_tx = advance_contract.createCollectible({"from": account})
File "brownie/network/contract.py", line 1693, in call
return self.transact(*args)
File "brownie/network/contract.py", line 1566, in transact
return tx["from"].transfer(
File "brownie/network/account.py", line 642, in transfer
receipt, exc = self._make_transaction(
File "brownie/network/account.py", line 725, in _make_transaction
raise VirtualMachineError(e) from None
File "brownie/exceptions.py", line 121, in init
raise ValueError(str(exc)) from None
ValueError: Gas estimation failed: 'execution reverted'. This transaction will likely revert. If you wish to broadcast, you must set the gas limit manually.

[Sudhanmanoharan]

Hi @PatrickAlphaC , can I get any update on the above error?.

Thanks,
sudhan

[PatrickAlphaC]

Hi, yes, you need testnet LINK token. Check here for the most up to date rinkeby link testnet https://docs.chain.link/docs/link-token-contracts/

[TiagoBlauth]

Hey @Sudhanmanoharan, please review brownie-config.yaml

rinkeby:
vrf_coordinator: '0xb3dCcb4Cf7a26f6cf6B120Cf5A73875B7BBc655B'
link_token: '0x01BE23585060835E02B77ef475b0Cc51aA1e0709'
keyhash: '0x2ed0feb3e7fd2022120aa84fab1945545a9f2ffc9076fd6156fa96eaff4c1311'
fee: 100000000000000000

I faced the same issue as you and just reviewed these parameters. Now running ok. These addresses are from the training document and not from https://docs.chain.link/docs/vrf-contracts/. It is weird, but these ones from the documentation link are not working.

[otm12345]

i am very confused about this probleme , my walllet has enough of gas and the link token address full of link but i still face the same error , can you help please. thanks