Remix: Deploying a Smart Contract

Learn how to deploy a simple Solidity-based smart contract to Uptick using the Remix in-browser IDE

Pre-requisite Readings

• Installation

• Run a node

• MetaMask

Remix is an in-browser IDE for Solidity smart contracts. In this guide, we will learn how to deploy a contract to a running Uptick network through Remix and interact with it.

Connect Uptick account to Remix

If you haven’t already, follow the steps in the Metamask guide to import your Uptick private key into Metamask. Start the Uptick daemon and REST server.

Go to Remix. There are some contracts in the File Explorer. Replace these with the source code to Counter.sol below. On the left-most bar, select the Solidity Compiler and compile the contract.

pragma solidity >=0.7.0 <0.9.0;

contract Counter {
  uint256 counter = 0;

  function add() public {
    counter++;
  }

  function subtract() public {
    counter--;
  }

  function getCounter() public view returns (uint256) {
    return counter;
  }
}

Next, select the Deploy and Run option. Select Injected Web3 as the Environment. This will open a metamask popup for you to connect your Metamask to Remix. Select Connect to confirm.

You should see your account show up in the left-hand panel.

remix connected to uptick

Deploy and Interact

Now that your account is connected, you are able to deploy the contract. Press the Deploy button. A metamask pop-up will appear asking you to confirm. Confirm the transaction. You should see a log for the deployment transaction in the Uptick daemon logs:

I[2020-07-15|17:26:43.155] Added good transaction                       module=mempool tx=877A8E6600FA27EC2B2362719274314977B243671DC4E5F8796ED97FFC0CBE42 res="&{CheckTx:log:"[]" gas_wanted:121193 }" height=31 total=1

Once the contract has been successfully deployed, you will see it show up in the Deployed Contracts section in the left-hand side, as well as a green check in the Remix console showing the transaction details.

deployed contract through remix

Now, you are able to interact with the contract through Remix. For Counter.sol, click add. This will open a Metamask pop-up asking you to confirm. Confirm the transaction. Then, click getCounter to get the count, which should be 1.

interacting with deployed contract through remix