tendermint-testgen vs ibc-proto vs tendermint

tendermint-testgen is a library and a small binary utility for generating tendermint datastructures from minimal input (for testing purposes only). The library also contains some functionality to simplify running test batches.

ibc-proto provides Cosmos SDK & IBC Protocol Buffers definitions

Tendermint is a high-performance blockchain consensus engine that powers Byzantine fault tolerant applications written in any programming language. This crate provides core types for representing information about Tendermint blockchain networks, including chain information types, secret connections, and remote procedure calls (JSON-RPC).