Smart Contract NFT Example for Harmony One

NFT Collectible Example

Dependencies

1. yarn
   • can be installed with brew install yarn

Setting up for the first time

1. Run yarn install to install dependencies
2. In a terminal, run cp dev.env .env - please note, I did not take the time to setup a local blockchain with something like ganache.
3. Install Metamask and setup a wallet with the Harmony One testnet - see https://docs.harmony.one/home/network/wallets/browser-extensions-wallets/metamask-wallet I suggest using the mobile version.
4. In the .env file in the project, add the private key and mnemonic from your wallet. https://metamask.zendesk.com/hc/en-us/articles/360015290032-How-to-Reveal-Your-Seed-Phrase https://metamask.zendesk.com/hc/en-us/articles/360015289632-How-to-Export-an-Account-Private-Key
5. You can fund your wallet by visiting https://faucet.pops.one/

Compiling and deploying contracts

1. run yarn truffle compile - this will compile the contracts to do so.
2. Run truffle migrate --network testnet to run migrations and deploy the contract to testnet.
3. Run the truffle cli - yarn truffle console --network testnet
4. Type ArtCollectibleToken - this should dump the contents of the smart contract
5. Type nft = await ArtCollectibleToken.deployed() - we can now interact with our contract through nft.
   Typing nft will dump the entire object,
6. You will need to create a tokenUri for metadata and display - Example is in the project - json/art-sample.json
7. Now run await nft.mint("address of recipient","image url","artist name", "tokenUri") - this will mint the token and send it to the intended recipient. Use your own address, and it is probably a good idea to have the image url match the metadata url. Copy the address from your metamask wallet, not in the one format.

End result

You should able to see your NFT in Metamask mobile - you can add it to Metamask in Chrome but it will not render as a collectible. (https://metamask.zendesk.com/hc/en-us/articles/360015489031-How-to-View-See-Your-Tokens-and-Custom-Tokens-in-Metamask)

Let me know if there are any issues!