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JavaScript Guide

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Prerequisites

Overview

A JavaScript or Typescript developer can use the Fireblocks API in 2 different ways:

  1. The Fireblocks JavaScript SDK.
  2. A standard HTTP library, such as Axios.

In this guide, you'll set up the Fireblocks SDK and see an example of non-SDK usage (including signing the JWT token).

Additionally if you are developing on EVM chains - you might be using some of the familiar libraries, such as web3.js or ethers.js - Fireblocks is well intergrated into these libraries as described in the Ethereum Development.

Using the Fireblocks SDK

Install Node v16 or newer

The Fireblocks JavaScript SDK requires Node v16 or newer. You can check which version of Node you already have installed by running the following command.

node -v

Learn how to install or update Node to a newer version.

Install fireblocks-sdk

The Fireblocks JavaScript SDK is open-source and hosted on both GitHub and PIP, the official package repository.

Installing the latest SDK is easy with npm:

npm install fireblocks-sdk

Your First Fireblocks JavaScript script!

Now that you're set-up, run a quick check for the API. The script will query existing vaults, create a new vault and then query again to see that the vaults were created.

This Axios-based implementation will require some library dependencies:

📘

Use the correct API Base URL

In the following script, make sure you're using the correct value for baseUrl for your environment:

  • For Sandbox workspaces: https://sandbox-api.fireblocks.io
  • For Mainnet or Testnet workspaces: https://api.fireblocks.io

Learn more about workspace differences.

const fs = require('fs');
const path = require('path');
const { FireblocksSDK } = require('fireblocks-sdk');
const { exit } = require('process');
const { inspect } = require('util');

const apiSecret = fs.readFileSync(path.resolve("</path/to/fireblocks_secret.key>"), "utf8");
const apiKey = "<your-api-key-here>"
// Choose the right api url for your workspace type 
const baseUrl = "https://sandbox-api.fireblocks.io";
const fireblocks = new FireblocksSDK(apiSecret, apiKey, baseUrl);

(async () => {

    // Print vaults before creation
    let vaultAccounts = await fireblocks.getVaultAccountsWithPageInfo({});
    console.log(inspect(vaultAccounts, false, null, true));

    // Create vault account
    const vaultCreation = await fireblocks.createVaultAccount("QuickStart_Vault");
    console.log(inspect(vaultCreation, false, null, true));

    // Print vaults after creation
    vaultAccounts = await fireblocks.getVaultAccountsWithPageInfo({});
    console.log(inspect(vaultAccounts, false, null, true));

})().catch((e)=>{
    console.error(`Failed: ${e}`);
    exit(-1);
})

const fs = require('fs');
const path = require('path');
const { FireblocksSDK } = require('fireblocks-sdk');
const { exit } = require('process');
const { inspect } = require('util');
const axios = require('axios');
const { sign } = require('jsonwebtoken');
const { v4: uuid } = require('uuid');
const crypto = require('crypto');

const apiSecret = fs.readFileSync(path.resolve("</path/to/fireblocks_secret.key>"), "utf8");
const apiKey = "<your-api-key-here>" 
// Choose the right api url for your workspace type 
const baseUrl = "https://sandbox-api.fireblocks.io"; 
const fireblocks = new FireblocksSDK(apiSecret, apiKey, baseUrl);

class FireblocksRequestHandler{

    baseUrl;
    apiSecret;
    apiKey;

    constructor(apiSecret, apiKey, baseUrl = "https://api.fireblocks.io"){
        this.baseUrl = baseUrl;
        this.apiSecret = apiSecret;
        this.apiKey = apiKey;
    }

    async post(path, data){
        const jwt = this.jwtSign(path,data);
        return (await this.req(jwt, path, data, "POST"));
    }

    async get(path) {
        const jwt = this.jwtSign(path);
        return (await this.req(jwt, path, undefined, "GET"));
    }

    async req(jwt, path, data, method){
        const resp = await axios({
            url: `${this.baseUrl}${path}`,
            method: method,
            data,
            headers:{
                "X-API-Key":this.apiKey,
                "Authorization": `Bearer ${jwt}`
            }
        });
        return resp.data;
    }

    jwtSign(path, data){
        const token = sign({
            uri: path,
            nonce: uuid(),
            iat: Math.floor(Date.now() / 1000),
            exp: Math.floor(Date.now() / 1000) + 55,
            sub: this.apiKey,
            bodyHash: crypto.createHash("sha256").update(JSON.stringify(data || "")).digest().toString("hex")
        }, this.apiSecret, {algorithm: "RS256"});
        return token;
    }

}

(async () => {

    const requestHandler = new FireblocksRequestHandler(apiSecret, apiKey);
    
    // Print vaults before creation
    let vaults = await requestHandler.get("/v1/vault/accounts_paged");
    console.log(inspect(vaults, false, null, true));

    // Create vault account
    const vaultCreation = await requestHandler.post("/v1/vault/accounts", {"name":"QuickStart_Vault"});
    console.log(inspect(vaultCreation, false, null, true));

    // Print vaults after creation
    vaults = await requestHandler.get("/v1/vault/accounts_paged");
    console.log(inspect(vaults, false, null, true));

})().catch((e)=>{
    console.error(`Failed: ${e}`);
    exit(-1);
});

🚧

Warning - Reference only

These examples are not production-ready and are used only for reference.

Please follow our security guidelines for secure API interaction.

Updated 6 months ago