Dynamic Metadata with Automation

Open the 2_complete.sol contract in Remix and rename the contract to dynNFT.sol.

Compile the contract in Remix. Under the section titles DEPLOY & RUN TRANSACTIONS you will have to change some values in the dropdown menus. Under ENVIRONMENT, select Injected Provider - MetaMask or WalletConnect depending on the cryptocurrency wallet you are using. Selecting one of these options will prompt you to connect your wallet with Remix.

Ensure that the CONTRACT field displays dynNFT. Finally, for the Deploy value, you must enter a time interval value denoting when the dynamic NFT will change. For this demo, we have inputted 30, but you can change this value. Once you have entered your interval, click the orange Deploy button and follow the prompts to allow the transaction to be performed. This may take a few minutes depending on factors such as network traffic.

Once the contract is deployed, you should be able to see more information under the Deployed Contracts section.

At this point, you can mint an NFT. In the field next to safeMint paste your wallet address. Then, click the orange transact button and follow the prompts to confirm the transaction.

After minting the NFT, you can look at the stage of the NFT based on the tokenURIs given in the contract. Enter "0" in the flowerStage field and click the blue call button. You should see the stage of the NFT.

Enter 0 in the tokenURI field and click the blue call button to see the corresponding URI for the NFT.

Copy the contract address and open the Chainlink Automation Interface. Connect your wallet to the network and click the blue button Register New Upkeep. For the Trigger mechanism, select Custom logic. You will prompted to enter your contract address. Paste your address and click Next.

You must fill out the prompts to finish registering upkeep. For the Starting balance (LINK), enter 0.5 for this demo. After entering information, click Register Upkeep. It may take a few moments for this to complete.

Navigate back to Remix. Under the Deployed Contracts section, enter [] in the checkUpkeep field and click the blue button. You may see the following text: upkeepNeeded true. This means that an upkeep will be performed.

While waiting for the upkeep to be performed, copy the contract address to your clipboard and open OpenSea (https://testnets.opensea.io/). Paste your address in search bar at the top of the page. You should be directed to a page with the image of your minted NFT. Click the seed thumbnail to learn more about the NFT.

Navigate back to Remix. Enter [] in the checkUpkeep field and click the blue button. If this returns upkeepNeeded false your upkeep should have been performed. Navigate to the Chainlink Automation Interface and select your upkeep to view more details and to confirm that an upkeep was performed. If upkeepNeeded false is not returned in Remix, you may have to wait a few minutes and run the checkUpkeep function.

Once the upkeep has been performed, navigate to Remix and click flowerStage and tokenURI to see the most recent flower stage and corresponding URI. Navigate back to the information of your NFT on OpenSea. Click the button on the top right to refresh the metadata. You should see the NFT become a bloom.

To see the NFT become a fully blossomed flower, you will have to wait another 30 seconds (or the amount of time you denoted when deploying your contract). After this interval, refresh the NFT's metadata again. You should see a fully blossomed flower. You have now completed the tutorial.