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interchaintest

Formerly known as ibctest.

Go Reference License: Apache-2.0 Go Report Card

🌌 Why use interchaintest?

In order to ship production-grade software for the Interchain, we needed sophisticated developer tooling...but IBC and Web3 have a lot of moving parts, which can lead to a steep learning curve and all sorts of pain. Recognize any of these?

  • repeatedly building repo-specific, Docker- and shell-based testing solutions,
  • duplication of effort, and
  • difficulty in repurposing existing testing harnesses for new problem domains.

We built interchaintest to extract patterns and create a generic test harness: a use-case-agnostic framework for generating repeatable, diagnostic tests for every aspect of IBC.

Read more at the Announcing interchaintest blog post.

🌌🌌 Who benefits from interchaintest?

interchaintest is for developers who expect top-shelf testing tools when working on blockchain protocols such as Cosmos or Ethereum.

🌌🌌🌌 What does interchaintest do?

interchaintest is a framework for testing blockchain functionality and interoperability between chains, primarily with the Inter-Blockchain Communication (IBC) protocol.

Want to quickly spin up custom testnets and dev environments to test IBC, Relayer setup, chain infrastructure, smart contracts, etc.? interchaintest orchestrates Go tests that utilize Docker containers for multiple IBC-compatible blockchains.

🌌🌌🌌🌌 How do I use it?

As a Module

Most people choose to import interchaintest as a module.

As a Binary

There's also an option to build and run interchaintest as a binary (which might be preferable, e.g., with custom chain sets). You can still run Conformance Tests.

References

🌌🌌🌌🌌🌌 Extras

Maintained Branches

Branch Name IBC-Go Cosmos-sdk
main v8 v0.50
v7 v7 v0.47

Deprecated Branches

These are branches that we no longer actively update or maintain but may be of use if a chain is running older versions of the Cosmos SDK or IBC Go. Please see the Backport Policy below.

Branch Name IBC-Go Cosmos-sdk Deprecated Date
v6 v6 v0.46 Sept 5 2023
v5 v5 v0.46 Aug 11 2023
v4 v4 v0.45 Aug 11 2023
v4-ics v4 v0.45.x-ics Aug 11 2023
v3 v3 v0.45 June 25 2023
v3-ics v3 v0.45.11-ics April 24 2023

Backport Policy:

Strangelove maintains n and n - 1 branches of interchaintest, n being current main.

We strive to keep interchaintest inline with the latest from the ibc-go and cosmos sdk teams. Once an alpha versions of the next major ibc-go version is released, we will discontinue n - 1 and branch off a new n.

Recommendation: Even if your chain uses an older version of ibc-go, try importing from main. This should work unless you are decoding transactions that require a specific ibc-go version.

If there is a feature you would like backported to an older branch, make an issue! We are happy to work with you.

Contributing

Contributing is encouraged.

Please read the logging style guide.

Trophies

Significant bugs that were more easily fixed with interchaintest:

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e2e testing framework for the interchain

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