paritytech/txwrapper-core

txwrapper-core is a toolkit for FRAME chain builders to create chain-specific offline transaction generation libraries, enabling end users to construct transactions without an active network connection. It provides essential tools and utilities for building txwrappers, which are specialized libraries for generating transactions for specific Substrate-based chains like Polkadot or Kusama. The project is designed for developers building blockchain applications who need offline transaction capabilities.