Using the Typescript SDK

The FIO Typescript SDK is an opensource SDK used to interact with FIO blockchain using the FIO API.

There are two types of interactions with the FIO blockchain: FIO API Getters and FIO Transactions.

FIO API Getters

FIO API getters are used to retrieve information. These calls do not require any signing and may be called directly without any pre-packaging.

FIO Transactions

FIO Transactions are sent to /push_transaction, a generic API endpoint that accepts all FIO action data objects. Transaction instances consist of a transaction header, the list of action instances, and transaction extensions that make the actual transaction.

All transactions must be packed and signed prior to submitting them to /push_transaction.

Initializing the SDK

Getting started with the SDK is easy. To start, FIO must be imported and initialized.

Importing using commonJS syntax is supported by Node.js out of the box:

    const { FIOSDK } = require('@fioprotocol/fiosdk');
    const { fetch } = require('node-fetch');

The Typescript SDK uses a singleton model requiring initialization in the constructor as these parameters are referenced in subsequent SDK Calls.

    const fetchJson = async (uri, opts = {}) => {
        return fetch(uri, opts)
    const privateKey = 'your_private_key';
    const publicKey = 'your_public_key';
    const baseUrl = '';
    fioSdk = new FIOSDK(
  • privateKey/publicKey - The wallet user’s private/public keys
  • baseURL - The base URL to a FIO Protocol blockchain API node
  • fetchjson - A reference to fetchJson, used for http post/get calls

Once initialized, the fioSdk object can be used to send transactions to the FIO blockchain. Refer to the Typescript SDK examples for more usage details.