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Popular blockchain choices for building Web3 capabilities are based typically on the Ethereum Virtual Machine (EVM), and therefore share the development tech stack. Some examples of EVM blockchains:
  • Ethereum
  • BNB Chain (BSC)
  • Polygon
  • Avalanche
  • Arbitrum

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Convenience libraries

Most commonly, developers interact with EVM-based blockchains using “convenience libraries” such as web3.js and ethers.js. To streamline your JavaScript development experience, we created the Fireblocks Web3 Provider, to easily connect ethers.js and web3.js to your Fireblocks workspace.

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web3.js integration

The Fireblocks Web3 Provider helps seamlessly integrate Fireblocks into your web3.js development stack. Use it to deploy contracts, sign messages, and send transactions.

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Installation

npm install @fireblocks/fireblocks-web3-provider web3

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Setup

import { FireblocksWeb3Provider, ChainId, ApiBaseUrl } from "@fireblocks/fireblocks-web3-provider";

const eip1193Provider = new FireblocksWeb3Provider({
    apiBaseUrl: ApiBaseUrl.Sandbox, // If using a sandbox workspace
    privateKey: process.env.FIREBLOCKS_API_PRIVATE_KEY_PATH,
    apiKey: process.env.FIREBLOCKS_API_KEY,
    vaultAccountIds: process.env.FIREBLOCKS_VAULT_ACCOUNT_IDS,
    chainId: ChainId.SEPOLIA,
})
If you are not using a Sandbox environment, but rather a regular one, just comment the apiBaseUrl line.

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Usage

import Web3 from "web3";

const web3 = new Web3(eip1193Provider);
Now you can use the web3 object exactly as you normally would!

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Example

In this example we are executing the ‘approve’ method of USDC (ERC20) token on Sepolia by using web3.js and Fireblocks web3 provider. 
const { FireblocksWeb3Provider, ChainId, ApiBaseUrl } = require("@fireblocks/fireblocks-web3-provider")
const Web3 = require("web3");

// Import the Sepolia USDC ABI
const ABI = require("./USDC_SEPOLIA_ABI.json");

// Sepolia USDC Contract Address
const CONTRACT_ADDRESS = "0x94a9d9ac8a22534e3faca9f4e7f2e2cf85d5e4c8"

const eip1193Provider = new FireblocksWeb3Provider({
    privateKey: process.env.FIREBLOCKS_API_PRIVATE_KEY_PATH,
    apiKey: process.env.FIREBLOCKS_API_KEY,
    vaultAccountIds: process.env.FIREBLOCKS_VAULT_ACCOUNT_IDS,
    chainId: ChainId.SEPOLIA,
 // apiBaseUrl: ApiBaseUrl.Sandbox // If using a sandbox workspace
});

(async() => {

  	const web3 = new Web3(eip1193Provider);
  	const myAddr = await web3.eth.getAccounts()
  	const contract = new web3.eth.Contract(ABI, CONTRACT_ADDRESS);
  	const spenderAddr = "<spender_address>"

    // 1 USDC to approve
    const amount = 1e6

    // Invoke approve method
    console.log(
        await contract.methods.approve(spenderAddr, amount).send({
            from: myAddr[0]
        })
    )

})().catch(error => {
    console.log(error)
});

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ethers.js integration

The Fireblocks Web3 Provider helps seamlessly integrate Fireblocks into your ethers.js development stack. You can use it to deploy contracts, sign messages, and send transactions.

​
Installation

npm install @fireblocks/fireblocks-web3-provider ethers@5

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Setup

import { FireblocksWeb3Provider, ChainId, ApiBaseUrl } from "@fireblocks/fireblocks-web3-provider";

const eip1193Provider = new FireblocksWeb3Provider({
    apiBaseUrl: ApiBaseUrl.Sandbox, // If using a sandbox workspace
    privateKey: process.env.FIREBLOCKS_API_PRIVATE_KEY_PATH,
    apiKey: process.env.FIREBLOCKS_API_KEY,
    vaultAccountIds: process.env.FIREBLOCKS_VAULT_ACCOUNT_IDS,
    chainId: ChainId.SEPOLIA,
})
If you are not using a Sandbox environment, but rather a regular one, just comment the apiBaseUrl line.

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Usage

import * as ethers from "ethers"

const provider = new ethers.providers.Web3Provider(eip1193Provider);
Now you can use the provider object exactly as you normally would!

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Example

In this example we are executing the ‘approve’ method of USDC (ERC20) token on Sepolia by using ethers.js and Fireblocks web3 provider. 
const { FireblocksWeb3Provider, ChainId, ApiBaseUrl } = require("@fireblocks/fireblocks-web3-provider")
const ethers = require("ethers")

// Import the Sepolia USDC ABI
const ABI = require("./USDC_SEPOLIA_ABI.json");

// Sepolia USDC Contract Address
const CONTRACT_ADDRESS = "0x94a9d9ac8a22534e3faca9f4e7f2e2cf85d5e4c8"

const eip1193Provider = new FireblocksWeb3Provider({
    privateKey: process.env.FIREBLOCKS_API_PRIVATE_KEY_PATH,
    apiKey: process.env.FIREBLOCKS_API_KEY,
    vaultAccountIds: process.env.FIREBLOCKS_VAULT_ACCOUNT_IDS,
    chainId: ChainId.SEPOLIA,
 // apiBaseUrl: ApiBaseUrl.Sandbox // If using a sandbox workspace
});

(async() => {

    const provider = new ethers.providers.Web3Provider(eip1193Provider);
    const myContract = new ethers.Contract(CONTRACT_ADDRESS, ABI, provider.getSigner());
    const spenderAddr = "<spender_address>"

    // 1 USDC to approve
    const amount = 1e6

    // Invoke approve method
    const tx = await myContract.approve(
        spenderAddr,
        amount
    )

    console.log(JSON.stringify(tx, null, 2))

})().catch(error => {
    console.log(error)
});

​
Viem integration

The Fireblocks Web3 Provider helps seamlessly integrate Fireblocks into your viem development stack. You can use it to deploy contracts, sign messages, and send transactions.

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Installation

npm install @fireblocks/fireblocks-web3-provider viem

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Setup

import { FireblocksWeb3Provider, ChainId, ApiBaseUrl } from "@fireblocks/fireblocks-web3-provider";

const eip1193Provider = new FireblocksWeb3Provider({
    apiBaseUrl: ApiBaseUrl.Sandbox, // If using a sandbox workspace
    privateKey: process.env.FIREBLOCKS_API_PRIVATE_KEY_PATH,
    apiKey: process.env.FIREBLOCKS_API_KEY,
    vaultAccountIds: process.env.FIREBLOCKS_VAULT_ACCOUNT_IDS,
    chainId: ChainId.SEPOLIA,
})
If you are not using a Sandbox environment, but rather a regular one, just comment the apiBaseUrl line.

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Usage

const { createWalletClient, custom } = require("viem")
const { sepolia } = require("viem/chains")

const walletClient = createWalletClient({
    chain: sepolia,
    transport: custom(eip1193Provider),
});
Now you can use the walletClient object exactly as you normally would!

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Example

In this example we are executing the ‘approve’ method of USDC (ERC20) token on Sepolia by using viem and Fireblocks web3 provider. 
const { sepolia } = require("viem/chains")
const {
  ChainId,
  FireblocksWeb3Provider,
  ApiBaseUrl
} = require("@fireblocks/fireblocks-web3-provider")

const {
  createWalletClient,
  custom,
  createPublicClient,
  http
} = require("viem")

// Import the Sepolia USDC ABI
const ABI = require("./USDC_SEPOLIA_ABI.json");

// Sepolia USDC Contract Address
const CONTRACT_ADDRESS = '0x94a9d9ac8a22534e3faca9f4e7f2e2cf85d5e4c8'

(async () => {

  const spenderAddr = "<spender_addr>";

  // 1 USDC to approve
  const amount = 1e6;

  const eip1193Provider = new FireblocksWeb3Provider({
   // apiBaseUrl: ApiBaseUrl.Sandbox, // If using a sandbox workspace
    privateKey: process.env.FIREBLOCKS_API_PRIVATE_KEY_PATH,
    apiKey: process.env.FIREBLOCKS_API_KEY,
    vaultAccountIds: process.env.FIREBLOCKS_VAULT_ACCOUNT_IDS,
    chainId: ChainId.SEPOLIA
  });

  // Create wallet client instance
  const walletClient = createWalletClient({
    chain: sepolia,
    transport: custom(eip1193Provider),
  });

  // Create public client instance
  const publicClient = createPublicClient({
    chain: sepolia,
    transport: http()
  })

  // Get my account's address
  const [ account ] = await walletClient.getAddresses();

  // Simulate the 'approve' call
  const { request } = await publicClient.simulateContract({
    address: CONTRACT_ADDRESS,
    abi: ABI,
    functionName: 'approve',
    args: [spenderAddr, amount],
    account
  })

  // Execute approve call via Fireblocks
  await walletClient.writeContract(request)
})();

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Ethereum Smart Contract Development

Smart contract development frameworks make it easy to develop, test, and deploy smart contracts on EVM-based blockchains.

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Using Truffle

Use the Fireblocks Web3 Provider to seamlessly work with Truffle on top of Fireblocks.

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Installation

npm install -g truffle
npm install @fireblocks/fireblocks-web3-provider

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Configuration

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Step 1:

Set the environment variables

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Step 2:

Initialize an example Truffle NFT project: 
truffle unbox nft-box

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Step 3:

Edit the truffle-config.js file: 
require('dotenv').config();
const { FireblocksWeb3Provider, ChainId } = require("@fireblocks/fireblocks-web3-provider");

module.exports = {
  networks: {
    sepolia: {
      provider: () => new FireblocksWeb3Provider({
        privateKey: process.env.FIREBLOCKS_API_PRIVATE_KEY_PATH,
        apiKey: process.env.FIREBLOCKS_API_KEY,
        vaultAccountIds: process.env.FIREBLOCKS_VAULT_ACCOUNT_IDS,
        chainId: ChainId.SEPOLIA,
      }),
      network_id: ChainId.SEPOLIA,
    },
  },
  compilers: {
    solc: {
      version: "0.8.13"
    }
  },
};

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Usage:

truffle migrate --network sepolia