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Deploy on Celo with Remix

How to deploy a smart contract to Celo testnet, mainnet, or a local network using Remix.

Introduction to Remix

The Remix IDE is an open-source web and desktop application for creating and deploying Smart Contracts. Originally created for Ethereum, it fosters a fast development cycle and has a rich set of plugins with intuitive GUIs. Remix is used for the entire journey of contract development and is a playground for learning and teaching Celo.

In this guide, you will learn to deploy a smart contract on Celo using


To learn more about the features available to you as a smart contract developer with Remix, visit the Remix documentation.

Create a Smart Contract

  • Navigate to and select contracts > 1_Storage.sol from the File Explorers pane.
  • Review the smart contract code and learn more using the Solidity docs or with Solidity by Example.
  • Complete any changes to your smart contract and save the final version (Command/Ctrl + S).


Compile the Contract

  • Choose the Solidity Compiler Icon on the left side menu.
  • Check that your compiler version is within the versions specified in the pragma solidity statement.
  • Select the Compile button to compile your smart contract.


Deploy the Contract

  • Click the Deploy and Run Transactions Icon on the left side menu.
  • Choose Injected Web3 as your environment.
  • Connect MetaMask to Celo testnet and verify that the environment reads:
    • Custom (44787) network for Celo testnet
    • Custom (42220) network for Celo mainnet
  • Click Deploy and select Confirm in the MetaMask notification window to pay for the transaction


Interacting with the Contract

  • Select the dropdown on the newly deployed contract at the bottom of the left panel.
  • View the deployed contract’s functions using the Deployed Contracts window.
  • Select functions to read or write on the Celo testnet using the function inputs as needed.
  • Confirm write transactions in the MetaMask Notification Window to pay the transaction’s gas fee.


View Contract Details

  • Copy the contract address from the Deployed Contracts window on the left panel.
  • Navigate to the Celo Block Explorer and use the contract address to search for your contract.
  • Explore the details of your deployed smart contract and learn more about the explorer here.


Verify Contracts on Celo