With `StateVersion::V1` values over a certain size are not inlined and being put into the backend with their own hash. When accessing a value in the trie with a recorder, we check if the value is maybe already recorded and thus, we can check the cache. To check if a value is already recorded, we use the key of the value to differentiate them. The problem is when there are multiple tries, like multiple child tries that all have different values under the same key. Before this pull request we didn't have differentiated for which trie we already had recorded a (key, value) pair. This is now done by also taking the storage root into account in the recorder to differentiate the different (key, value) pair in the tries.
Substrate ·

Substrate is a next-generation framework for blockchain innovation 🚀.
Getting Started
Head to docs.substrate.io and follow the installation instructions. Then try out one of the tutorials.
Community & Support
Join the highly active and supportive community on the Susbstrate Stack Exchange to ask questions about use and problems you run into using this software. Please do report bugs and issues here for anything you suspect requires action in the source.
Contributions & Code of Conduct
Please follow the contributions guidelines as outlined in docs/CONTRIBUTING.adoc.
In all communications and contributions, this project follows the Contributor Covenant Code of Conduct.
Security
The security policy and procedures can be found in docs/SECURITY.md.
License
- Substrate Primitives (
sp-*), Frame (frame-*) and the pallets (pallets-*), binaries (/bin) and all other utilities are licensed under Apache 2.0. - Substrate Client (
/client/*/sc-*) is licensed under GPL v3.0 with a classpath linking exception.
The reason for the split-licensing is to ensure that for the vast majority of teams using Substrate to create feature-chains, then all changes can be made entirely in Apache2-licensed code, allowing teams full freedom over what and how they release and giving licensing clarity to commercial teams.
In the interests of the community, we require any deeper improvements made to Substrate's core logic (e.g. Substrate's internal consensus, crypto or database code) to be contributed back so everyone can benefit.
