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Using ThunderCore with Blockmason Link

ThunderCore is an Ethereum compatible, Smart Contract platform boasting 1,200+ transactions-per-second (TPS), quick block confirmations and low gas costs, making it quick and easy for DApps to deploy and scale.

In this onboarding example, we will deploy a smart contract to the ThunderCore Testnet.

Setup

You can obtain some testnet TT tokens from ThunderCore Testnet Faucet to be sent to your Link default account address (note you need to sign-in with Google or Github):

ThunderCore Testnet Faucet

API project setup in Link

  1. In Link, either press the + Create new button above the code editor or open up the setting dropdown menu and select New Project - both which starts the new project wizard.

Link New Project

  1. Under Which contract would you like to use?, select Ownership if the contract already exists, or select Create new and then copy and paste the Ownership.sol code into the Source Code field. Set the Display Name as Ownership. Press Save and Next.

New Contract Link.

  1. Under Which Ethereum account would you like to use?, use the Default Account. This is the account we seeded with test TT tokens as part of the setup.

Default Link Account

  1. Under Which network would you like to use?, select Create new and call it ThunderCore Testnet. Keep the Block Confirmations Needed at 0.

At the time writing this guide, ThunderCore uses the byzantium EVM Version. Please check https://developers.thundercore.com/docs/migrate-to-thunder/ for the latest version information.

Press Save and Next.

New Network Link

  1. Under Which connector would you like to use?, select Create new. Call this connector ThunderCore Testnet Connector and use the URL https://testnet-rpc.thundercore.com (see https://developers.thundercore.com/docs/migrate-to-thunder/ for more details). Ensure the Network selected is ThunderCore Testnet. Press Save and Next.

New Network Connector Link

  1. Now we just need to label our Deployment. Under Where is your contract deployed?, select Create new. Call this deployment Ownership ThunderCore Testnet Deployment. Since we do not have an existing contract deployment, leave the Address field blank. Ensure the Account is the Default Account, the Contract is the Ownership contract and the Network ThunderCore Testnet. Press Save and Next.

ThunderCore deployment Link

  1. Now we're ready to deploy our contract to the ThunderCore Testnet. Press Deploy and you should get a deployment in progress indicator icon. This might take up to a minute to complete. If deployed correctly, you'll proceed to the next step to set up your API.

Ready to Deploy in Link

  1. Now we label our Ownership contract API. Under Name, call it ownership-thundercore-testnet Also add in a human-readable display name. Ensure you are using the correct Contract Deployment. Press Save and Next.

Link API New

  1. Now we label our Ownership API Consumer. This would normally be the name of the app or service calling the API. For example, let's call the consumer Collectible Stamps App. Ensure you are using the correct API and Account. Press Save and Next.

Link Consumer New

  1. Lastly, your consumer needs to authenticate with the Ownership API. An OAuth2.0 Client Secret is automatically generated. Ensure you are using the correct Principal/Consumer. Press Save, Next and then Finish.

Create new OAuth

Once you hit Finish, you should end up back at Home page and see your Ownership code in the IDE, the API tab and a gear icon containing the client_id and client_secret at the bottom of the page which you will use in your app.

API Documentation Link

Let's also check that our Ownership contract deployed correctly on the ThunderCore Testnet. Click on the Ethereum Contract Deployments menu item to see a list of contract deployments and their addresses. Copy and paste the address of the Ownership ThunderCore Testnet Deployment into the ThunderCore Testnet explorer https://scan-testnet.thundercore.com/ to see the details of your contract deployment.

Link Contract Deployments List

In the above example, the contract address on the ThunderCore network is 0x8a446ed8f2e64729e0e9c133945577df76d04480.

ThunderCore Explorer

And we see our contract deployed on ThunderCore!

Now you can go ahead and use the Link API endpoints which are linked to the Ownership smart contract deployed on ThunderCore Testnet!

Test Ownership API endpoints

A simple JavaScript file using the Link JavaScript SDK in a Node environment can be found here:

https://github.com/blockmason/link-onboarding/blob/master/ownership-link-sdk-demo.js

First, run npm install from your Terminal to install the node-fetch and @blockmason/link-sdk dependencies (see package.json).

Then, in ownership-link-sdk-demo.js, update the clientID and clientSecret for authentication.

Finally run the ownership-link-sdk-demo.js script using Node from the Terminal. You should see an output in Terminal similar to the following:

Ownership Script Example

Check your Ownership contract using the ThunderCore Testnet Explorer to confirm the new transactions representing the setOwner() and getOwner() function calls.

Deploying to ThunderCore Mainnet

If you want to deploy on the ThunderCore Mainnet, just follow the same steps above with the following differences:

  1. Acquire Mainnet TT tokens to send to your Link default account wallet
  1. Use the use the appropriate ThunderCore Mainnet RPC endpoint.
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