Build and Deploy Smart Contract on the Avalanche Network

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Build and Deploy Smart Contract on the Avalanche Network

Olubisi Idris Ayinde
·Sep 13, 2022·

6 min read

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Table of contents

The rapid popularity of Web3 has sparked a race to create the fastest, safest blockchain possible without sacrificing decentralization.

It's incredible how powerful decentralized applications are being developed to support the business environment.

In this article, you will learn about setting up Avalanche on Metamask, funding the C-Chain address, introducing the Avalanche network, building and deploying a smart contract on the Avalanche network, and verifying deployment on Snowtrace.

Introduction to Avalanche

Avalanche is an open-source platform that enables the deployment of enterprise blockchains and decentralized apps in a single, highly scalable ecosystem.

With nearly immediate transaction finality, Avalanche is the first decentralized smart contracts platform designed for the scope of global banking. As Avalanche functions out of the box with Solidity, Ethereum developers may immediately build on it.

Exchange Chain (X-Chain), Platform Chain (P-Chain), and Contract Chain are the three built-in blockchains of Avalanche (C-Chain).

All Avalanche validators, commonly known as the Primary Network, validate and safeguard all three blockchains. All users of all custom Subnets must also be members of the Primary Network, which is a unique Subnet, by staking a minimum of 2,000 AVAX.

  • X-Chain: This chain manages assets and uses the X-Chain API that allows clients to create and trade assets on the X-Chain and other instances of the AVM.
  • P-Chain: This is used to coordinate validators, keeps track of active Subnets, enables the creation of new Subnets, and uses the Snowman consensus protocol.
  • C-Chain: This chain is used to create smart contracts using the C-Chain's API.

Project Setup and Installation

This section will set up all the requirements to build and deploy a smart contract on the Avalanche network.

Setting up Avalanche on MetaMask

Ensure you have MetaMask installed and set up completely.

Click on the MetaMask icon on your browser and the arrow icon beside the Network, as shown below. Click on the MetaMask Icon

Click the arrow icon beside the Network - MetaMask

Next, select Add Network.

Select Add Network on MetaMask

You can add the following configuration to set up RPC to Avalanche Mainnet, FUJI Testnet, and Local Testnet (Avalanche Network Runner).

Local Testnet (Avalanche Network Runner) Settings:

  • Network Name: Avalanche Local C-Chain
  • New RPC URL: 127.0.0.1:34890/ext/bc/C/rpc (Note: the port number should match your local setting, which can be different from 34890.)
  • ChainID: 43112
  • Symbol: AVAX
  • Explorer: N/A

FUJI Testnet Settings:

Avalanche Mainnet Settings:

Set up the FUJI Testnet by inputting the details as shown below.

Setup the Avalanche FUJI Testnet on MetaMask

Funding your C-Chain address

To send money from the X-Chain to your C-Chain address on the main net, utilize the Avalanche Wallet. Use the Test Network Faucet to get funding on the test network.

Copy and paste your C-Chain address into faucet.avax.network.

Automatically, Faucet will be aware that it must deliver the test AVAX to the C-Chain. The Request AVAX button can be selected after checking the captcha box. In a few seconds, test AVAX will be delivered to your address.

Funding your C-Chain address on Avalanche Network

Smart Contract Development

You'll learn how to build and deploy an ERC20 Token Smart Contract using remix.ethereum.org, a free, user-friendly IDE with a solidity-compatible IntelliJ feature and decent compile-time errors.

Building a smart contract

Navigate to the Remix site and create a new file called FancyToken.sol as shown below.

Setup a smart contract file on Remix IDE

Update the FancyToken.sol file with the following code snippet.

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract FancyToken is ERC20, Ownable {
    constructor() ERC20("FancyToken", "FT") {
        _mint(msg.sender, 1000 * 10 ** decimals());
    }

    function mint(address to, uint256 amount) public onlyOwner {
        _mint(to, amount);
    }
}

In the code snippet above, we:

  • Import the OpenZeppelin ERC20 contract
  • Initialize the token, inheriting from the ERC20.sol contract
  • Declare a new contract called FancyToken, using the Solidity keyword contract, while inheriting the ERC20 OpenZeppelin's contract using the is keyword
  • Create an initial amount of 1000 tokens for the deployer
  • Give access to Privileged accounts to create more supply using the mint function.

Create a new file on Remix IDE

Compiling a smart contract

Next, you will compile your contract and prepare it for deployment, as shown below.

Compile smart contract on Remix IDE

Smart Contract Deployment to Avalanche Network

In this step, you will deploy your smart contract to the Avalanche Network on FUJI testnet.

Select the Injected Provider - MetaMask on the dropdown.

Deploy a smart contract to Avalanche Network

Select the contract FancyToken you want to deploy.

Select smart contract to deploy on Remix IDE

Next, click the Deploy button, as shown below.

Deploy a smart contract on Remix IDE

Sign transaction

You will see a deployment message on the console, as shown below.

Token deployed successfully

Import Token on MetaMask

You have successfully deployed your token. In this step, you will import the token on MetaMask. Click on the icon below to copy the contract address you just deployed.

Import token on MetaMask

Next, click on the MetaMask logo on your browser, select Assets and then click on Import tokens as shown below.

Select Asset and click import token

Paste the contract address you copied in the previous step; the token name will populate automatically. Then proceed by clicking on the Add Custom Token button below.

Import token on MetaMask

Import token on MetaMask

Voila 🥳 your token was just imported successfully.

View token imported on MetaMask

Verify Smart Contract Deployment on Snowtrace

In this step, you will verify your smart contract deployment and other information on Snowtrace. SnowTrace enables you to browse and search the Avalanche C-Chain blockchain for transactions, addresses, tokens, prices, and other Avalanche C-Chain activities (AVAX)

Navigate to the Snowtrace testnet site and paste the contract address as shown below.

Verify smart contract deployment on Snowtrace

View more info on smart contract deployment on Snowtrace

Smart contract information on Snowtrace

That's it. You can click here to view the smart contract of the project deployment.

Conclusion

In this article, you learned how to set up Avalanche on Metamask, fund the C-Chain address, introduce the Avalanche network, build and deploy a smart contract on the Avalanche network, and verify deployment on Snowtrace.

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