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INTRODUCTION The Basics Random Numbers API Calls Other Tutorials Basic Request Model Decentralized Data Model Off-Chain Reporting
USING DATA FEEDS Introduction to Data Feeds Get the Latest Price (EVM) Get the Latest Price (Solana) Historical Price Data Feed Registry API Reference ENS Ethereum Data Feeds Binance Smart Chain Data Feeds Polygon (Matic) Data Feeds xDai Data Feeds Huobi Eco Chain Data Feeds Avalanche Data Feeds Fantom Data Feeds Arbitrum Data Feeds Harmony Data Feeds Solana Data Feeds Optimism Data Feeds
USING RANDOMNESS Introduction to Chainlink VRF Get a Random Number API Reference Security Considerations Contract Addresses Best Practices
USING CHAINLINK KEEPERS Introduction Making Compatible Contracts Register Upkeep for a Contract Patterns and Best Practices Network Overview FAQs
USING ANY API Introduction to Using Any API Make a GET Request Make an Existing Job Request Multi-Variable Responses Large Responses Find Existing Jobs API Reference Contract Addresses
DEVELOPER REFERENCE Install Instructions LINK Token Contracts Developer Communications Getting Help Data Provider Nodes Hackathon Resources Contributing to Chainlink Install, configure & fund MetaMask Acquire testnet LINK Deploy your first contract Fund your contract Use your first contract!

Deploy your first contract

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Introducing Remix

Remix is a web IDE (integrated development environment) for creating, running, and debugging smart contracts in the browser. It is developed and maintained by the Ethereum foundation. Remix allows Solidity developers to write smart contracts without a development machine since everything required is included in the web interface. It allows for a simplified method of interacting with deployed contracts, without the need for a command line interface.

Create and deploy your first contract

Remix Welcome Screen

  • If you open remix for the first time, you should chose the Environments to Solidity

Remix Choose Solidity Environment

  • Click the gist label on the left side menu and click on ATestnetConsumer.sol

Remix Open File Explorer

  • Click the Solidity Compiler button in the left side bar, it will show compile tab page.

Remix Choose Solidity Compiler

  • Click Compile ATestnetConsumer.sol button in the upper left-hand of Remix.

Remix Click Compile

If you get errors after compiling, make sure your compiler is set to one of the 0.6.0 compilers. If you used the link to Remix within this guide above, this would have been set for you.

  • Now select the Deploy & run transactions tab in the left-hand of Remix.
  • Change your Environment to Injected Web3 (if it is not already set) then click on Deploy.

Remix Deploy a Contract

  • MetaMask will pop-up to confirm the transaction. Click on Confirm.

Metamask Confirm a Transaction Screen

Metamask doesn't pop up?

If Metamask does not prompt you and instead displays the error below, you will need to disable "Privacy Mode" in Metamask. You can do this by clicking on your unique account icon at the top-right, then go to the Settings. Privacy Mode will be a switch near the bottom. The error: Send transaction failed: invalid address. If you use an injected provider, please check it is properly unlocked.

  • A transaction link will be displayed at the bottom of Remix that displays deployment status.
    It will take a few moments for the contract to be deployed. The Remix UI will update upon completion.

Remix Transaction Confirmation Message

  • On the left side panel there is a section that displays the title of the contract (example ATestnetConsumer at 0x123...890 (blockchain)).

Remix Deployed Contracts

  • You can click on it to interact with your contract.

Remix Contract Interaction Screen

  • You can't do anything to this contract except read its state until you send LINK to it.

What's Next

› Fund your contract