* Add transactional storage functionality to OverlayChanges A collection already has a natural None state. No need to wrap it with an option. * Add storage transactions runtime interface * Add frame support for transactions * Fix committed typo * Rename 'changes' variable to 'overlay' * Fix renaming change * Fixed strange line break * Rename clear to clear_where * Add comment regarding delete value on mutation * Add comment which changes are covered by a transaction * Do force the arg to with_transaction return a Result * Use rust doc comments on every documentable place * Fix wording of insert_diry doc * Improve doc on start_transaction * Rename value to overlayed in close_transaction * Inline negation * Improve wording of close_transaction comments * Get rid of an expect by using get_or_insert_with * Remove trailing whitespace * Rename should to expected in tests * Rolling back a transaction must mark the overlay as dirty * Protect client initiated storage tx from being droped by runtime * Review nits * Return Err when entering or exiting runtime fails * Documentation fixup * Remove close type * Move enter/exit runtime to excute_aux in the state-machine * Rename Discard -> Rollback * Move child changeset creation to constructor * Move child spawning into the closure * Apply suggestions from code review Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com> * Fixup for code suggestion * Unify re-exports * Rename overlay_changes to mod.rs and move into subdir * Change proof wording * Adapt a new test from master to storage-tx * Suggestions from the latest round of review * Fix warning message Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>
Substrate ·

Substrate is a next-generation framework for blockchain innovation 🚀.
Trying it out
Simply go to substrate.dev and follow the installation instructions. You can also try out one of the tutorials.
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.
