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ibc-solidity

ibc-solidity is an Apache-2.0 Solidity library implementing IBC core specifications and ICS-20 fungible-token transfers, including ERC-20 transfer functionality. It provides light-client integration through the ILightClient interface for cross-chain applications on EVM-compatible networks.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

ibc-solidity — 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 it when developing Solidity applications that need IBC core or ICS-20 functionality and can integrate an appropriate light client and relaying components.

Who it is for

  • Solidity developers adding IBC messaging to applications on EVM-compatible chains.
  • Teams building IBC-style fungible-token transfers for ERC-20 assets.
  • Integrators connecting Cosmos and EVM chains with a light client and relayer.

Documented uses

  • Add IBC-compatible cross-chain messaging to Solidity contracts.
  • Implement ICS-20 transfers using ERC-20 tokens.
  • Connect a chain-specific light client through ILightClient.
  • Develop a relayer-connected bridge between Cosmos and an EVM-compatible chain.
Before you choose

Requirements & limits

The repository is public and licensed under Apache-2.0.

  • The repository states compatibility with IBC v8.
  • Integration requires a light client implementing ILightClient; the repository lists several examples.
  • Relayer support is provided through separately identified projects and modules.
  • The README describes the project as under development and unaudited.
  • Solidity protobuf code generation requires the separate solidity-protobuf tool, with version 0.1.0 specified.

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

Run the local QBFT end-to-end test

Launch two Hyperledger Besu chains with the contracts deployed, then run the project’s end-to-end test.

Before you start

  • A checkout of the ibc-solidity repository.
  • The repository’s documented Make targets.

Steps

  1. From the repository, run the command below to launch two Hyperledger Besu chains with the contracts deployed.

    Documented command
    make network-qbft

  2. After the chains launch, run the command below.

    Documented command
    make e2e-test

Expected outcome

The documented QBFT end-to-end test is executed against the launched chains.

Guide limitations

  • The project is under development and has not been audited.
  • The instructions do not describe test coverage or guarantee a successful run.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
Active
Sources checked
14 October 2026
Original website title
hyperledger-labs/yui-ibc-solidity · Official homepage title · retained in its source language
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