NFT: trying to run create_collectibles scripts throws execution reverted error : This is from Patrick Collins Youtube tutorial

Question

Below is the snip of the script: Using Brownie in VS Code Error: "Gas estimation failed: 'execution reverted'. This transaction will likely revert. If you wish to broadcast, you must set the gas limit manually."

from brownie import AdvancedCollectible, accounts, config
from scripts.helpful_scripts import get_breed
import time

STATIC_SEED = 123

def main():
    dev = accounts.add(config["wallets"]["from_key"])
    advanced_collectible = AdvancedCollectible[len(AdvancedCollectible) - 1]
    transaction = advanced_collectible.createCollectible(
        STATIC_SEED, "None", {"from": dev, "gas_limit": 50000}
    )
    print("Waiting on second transaction...")
    # wait for the 2nd transaction
    transaction.wait(1)
    time.sleep(35)
    requestId = transaction.events["requestedCollectible"]["requestId"]
    token_id = advanced_collectible.requestIdToTokenId(requestId)
    breed = get_breed(advanced_collectible.tokenIdToBreed(token_id))
    print("Dog breed of tokenId {} is {}".format(token_id, breed))

Answer 1

I think this has already been answered here. To summarize it, you probably have vrf_coordinator version error. Try the rinkeby's values from the official docs.

Answer 2

I had the same issue. But Patrick is correct, I did not have any Link tokens inside of my newly created contract on Rinkeby network...So I commented out most of the lines of the code in create_collectible.py to import and apply the fund_advanced_collectible() function once more on my contract:

from helpfulscripts import fund_advanced_collectible

def main():
    dev=accounts.add(config['wallets']['from_key'])
    advanced_collectible= AdvancedCollectible[len(AdvancedCollectible)-1]
    # transaction=advanced_collectible.createCollectible(STATIC_SEED,"None", {"from": dev})
    # transaction.wait(1)
    # time.sleep(35)
    # requestID=transaction.events["requestedCollectible"]["requestID"]
    # tokenID=advanced_collectible.requestIDToTokenID(requestID)
    # breed=get_breed(advanced_collectible.tokenIDToBreed(tokenID))

    # print('Dog breed of {} is {}.'.format(tokenID, breed)) 
    fund_advanced_collectible(advanced_collectible) 

With a reminder of the function definition of fund_advanced_collectible from helpfulscripts.py:

def fund_advanced_collectible(nft_contract):
    dev=accounts.add(config['wallets']['from_key'])
    link_token=interface.LinkTokenInterface(config['networks'][network.show_active()]['link_token'])
    link_token.transfer(nft_contract, 100000000000000000,{"from":dev})

Once the transaction was confirmed, I could verify in https://rinkeby.etherscan.io/address that my contract had 0.1 Link and so when executing your code again, the error disappeared...