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Interoperability & Bridges

Ion Interoperability Framework

Ion is a JavaScript-based framework and library that provides an interface for developing cross-chain smart contracts. It is designed for interactions between blockchains or other systems and includes examples involving Ethereum and Rinkeby.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Ion Interoperability Framework — OpenViST project profile in Interoperability & Bridges.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use Ion when you need a framework for developing cross-system contract interactions and want to study its repository examples. The documented setup and Rinkeby walkthrough are aimed at developers working with the project locally.

Who it is for

  • Developers building or exploring cross-chain smart contracts.
  • Teams investigating contract interactions that verify a transaction on one chain and use its data in another.

Documented uses

  • Develop smart contracts that interact across blockchains or systems.
  • Explore an example that verifies a Rinkeby transaction and uses its data in a later contract call.
  • Investigate atomic-swap or decentralised-exchange use cases built on an interoperability framework.
Before you choose

Requirements & limits

The repository is public and identifies its license as LGPL-3.0.

  • The README lists Node.js v10.15.0 and Go 1.8 as minimum versions for setup without Docker; it also provides a Docker-based setup path.
  • The example identifies Solidity v0.5.12 and includes an Ion CLI workflow for connecting to a client, adding an account, and deploying a contract.
  • The Rinkeby walkthrough requires a signing account and constructor parameters for the example contract.
  • Atomic swaps and decentralised exchanges are described as applications developers can build, not as ready-made services.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Set up Ion locally and run its test suite

Install the Ion dependencies and run the repository’s local test RPC and test suite.

Before you start

  • A cloned Ion repository.
  • For the non-Docker path, Node.js v10.15.0 and Go 1.8.

Steps

  1. For the Docker path, build and start the container with the command below and the command below, then open a shell in a separate terminal with the command below.

    Documented command
    docker build -t ion/dev .
    Documented command
    docker run -ti --name ion ion/dev
    Documented command
    docker exec -ti ion /bin/bash

  2. For the non-Docker path, from the repository directory run the command below.

    Documented command
    npm install

  3. Run the command below.

    Documented command
    npm run testrpc

  4. Run the command below.

    Documented command
    npm run test

Expected outcome

The README describes the test command as testing the full stack of contracts, including the example flow, and gives an example result of 74 passing tests.

Guide limitations

  • The Docker and non-Docker paths are alternatives; the documented Node.js and Go minimum versions apply to the non-Docker path.
  • The reported passing test count is an example in the README, not a guarantee of a current successful run.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
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Sources checked
16 October 2026
Original website title
clearmatics/ion · Official homepage title · retained in its source language
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