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Deploy a Smart Contract on UniFi using Foundry

Prerequisite​

Before you begin, ensure you've:

  1. Set up your wallet and have acquired Testnet tokens.

  2. Downloaded and installed Foundry:

    curl -L https://foundry.paradigm.xyz | bash

    Then, open a new terminal, and call foundryup to install the latest release.

    info

    Running foundryup will automatically install the latest (nightly) versions of the precompiled binaries: forge, cast, anvil, and chisel. For additional options, such as installing a specific version or commit, run foundryup --help

Create a Foundry project​

To create a Foundry project, run:

forge init unifi-smart-contract-tutorial

Running forge init sets up a sample contract, test, and script for Counter.sol.

Now change into the directory:

cd unifi-smart-contract-tutorial

Deploy a smart contract​

warning

Directly pasting your private key into the command line poses security risks. The examples below are instructional and don't adhere to good security practices. To avoid exposing sensitive information such as wallet private keys, use .env files to store private data. Create a .env file, then add the file to the .gitignore file to prevent committing it. Populate the .env file with the private information.

Deploy your contract using the following syntax:

forge create --rpc-url <rpc_https_endpoint> src/Counter.sol:Counter --private-key <your_private_key>

In the command:

  • rpc_https_endpoint is a RPC Endpoint for the UniFi network. You can find the endpoints in the RPC Endpoints Reference.
  • your_private_key is your wallet's private key.

Your output should look similar to:

Deployer: YOUR_WALLET_ADDRESS
Deployed to: 0xFCc25885bDcF17A0BF1C0E529100B6420e237Cbe
Transaction hash: 0x734c59643232b61b560da2c750d7ad808267fbc28331ee59102e431ec9559097

For more deployment options, see the forge-create documentation.

Verify your smart contract​

Optionally, you can verify your contract on the network. This makes the source code publicly available.

Deploy and verify a contract in one go​

To deploy and verify a contract in a single command, run:

forge create --rpc-url <rpc_https_endpoint> --private-key <your_private_key> src/Counter.sol:Counter --verify --verifier blockscout --verifier-url <blockscout_homepage_explorer_url>/api

In the command:

  • rpc_https_endpoint is a RPC Endpoint for the UniFi network. You can find the endpoints in the RPC Endpoints Reference.
  • your_private_key is your wallet's private key.
  • blockscout_homepage_explorer_url is the URL of the block explorer explorer you're using. You can find the endpoints in the RPC Endpoints Reference.

For more contract verification options, see the verify-contract documentation.