Serban Iorga
6be8898211
* Migrate fee payment from `Currency` to `fungible` (#2292) Part of https://github.com/paritytech/polkadot-sdk/issues/226 Related https://github.com/paritytech/polkadot-sdk/issues/1833 - Deprecate `CurrencyAdapter` and introduce `FungibleAdapter` - Deprecate `ToStakingPot` and replace usage with `ResolveTo` - Required creating a new `StakingPotAccountId` struct that implements `TypedGet` for the staking pot account ID - Update parachain common utils `DealWithFees`, `ToAuthor` and `AssetsToBlockAuthor` implementations to use `fungible` - Update runtime XCM Weight Traders to use `ResolveTo` instead of `ToStakingPot` - Update runtime Transaction Payment pallets to use `FungibleAdapter` instead of `CurrencyAdapter` - [x] Blocked by https://github.com/paritytech/polkadot-sdk/pull/1296, needs the `Unbalanced::decrease_balance` fix (cherry picked from commitbda4e75ac4) * Upgrade `trie-db` from `0.28.0` to `0.29.0` (#3982) - What does this PR do? 1. Upgrades `trie-db`'s version to the latest release. This release includes, among others, an implementation of `DoubleEndedIterator` for the `TrieDB` struct, allowing to iterate both backwards and forwards within the leaves of a trie. 2. Upgrades `trie-bench` to `0.39.0` for compatibility. 3. Upgrades `criterion` to `0.5.1` for compatibility. - Why are these changes needed? Besides keeping up with the upgrade of `trie-db`, this specifically adds the functionality of iterating back on the leafs of a trie, with `sp-trie`. In a project we're currently working on, this comes very handy to verify a Merkle proof that is the response to a challenge. The challenge is a random hash that (most likely) will not be an existing leaf in the trie. So the challenged user, has to provide a Merkle proof of the previous and next existing leafs in the trie, that surround the random challenged hash. Without having DoubleEnded iterators, we're forced to iterate until we find the first existing leaf, like so: ```rust // ************* VERIFIER (RUNTIME) ************* // Verify proof. This generates a partial trie based on the proof and // checks that the root hash matches the `expected_root`. let (memdb, root) = proof.to_memory_db(Some(&root)).unwrap(); let trie = TrieDBBuilder::<LayoutV1<RefHasher>>::new(&memdb, &root).build(); // Print all leaf node keys and values. println!("\nPrinting leaf nodes of partial tree..."); for key in trie.key_iter().unwrap() { if key.is_ok() { println!("Leaf node key: {:?}", key.clone().unwrap()); let val = trie.get(&key.unwrap()); if val.is_ok() { println!("Leaf node value: {:?}", val.unwrap()); } else { println!("Leaf node value: None"); } } } println!("RECONSTRUCTED TRIE {:#?}", trie); // Create an iterator over the leaf nodes. let mut iter = trie.iter().unwrap(); // First element with a value should be the previous existing leaf to the challenged hash. let mut prev_key = None; for element in &mut iter { if element.is_ok() { let (key, _) = element.unwrap(); prev_key = Some(key); break; } } assert!(prev_key.is_some()); // Since hashes are `Vec<u8>` ordered in big-endian, we can compare them directly. assert!(prev_key.unwrap() <= challenge_hash.to_vec()); // The next element should exist (meaning there is no other existing leaf between the // previous and next leaf) and it should be greater than the challenged hash. let next_key = iter.next().unwrap().unwrap().0; assert!(next_key >= challenge_hash.to_vec()); ``` With DoubleEnded iterators, we can avoid that, like this: ```rust // ************* VERIFIER (RUNTIME) ************* // Verify proof. This generates a partial trie based on the proof and // checks that the root hash matches the `expected_root`. let (memdb, root) = proof.to_memory_db(Some(&root)).unwrap(); let trie = TrieDBBuilder::<LayoutV1<RefHasher>>::new(&memdb, &root).build(); // Print all leaf node keys and values. println!("\nPrinting leaf nodes of partial tree..."); for key in trie.key_iter().unwrap() { if key.is_ok() { println!("Leaf node key: {:?}", key.clone().unwrap()); let val = trie.get(&key.unwrap()); if val.is_ok() { println!("Leaf node value: {:?}", val.unwrap()); } else { println!("Leaf node value: None"); } } } // println!("RECONSTRUCTED TRIE {:#?}", trie); println!("\nChallenged key: {:?}", challenge_hash); // Create an iterator over the leaf nodes. let mut double_ended_iter = trie.into_double_ended_iter().unwrap(); // First element with a value should be the previous existing leaf to the challenged hash. double_ended_iter.seek(&challenge_hash.to_vec()).unwrap(); let next_key = double_ended_iter.next_back().unwrap().unwrap().0; let prev_key = double_ended_iter.next_back().unwrap().unwrap().0; // Since hashes are `Vec<u8>` ordered in big-endian, we can compare them directly. println!("Prev key: {:?}", prev_key); assert!(prev_key <= challenge_hash.to_vec()); println!("Next key: {:?}", next_key); assert!(next_key >= challenge_hash.to_vec()); ``` - How were these changes implemented and what do they affect? All that is needed for this functionality to be exposed is changing the version number of `trie-db` in all the `Cargo.toml`s applicable, and re-exporting some additional structs from `trie-db` in `sp-trie`. --------- Co-authored-by: Bastian Köcher <git@kchr.de> (cherry picked from commit4e73c0fcd3) * Update polkadot-sdk refs * Fix Cargo.lock --------- Co-authored-by: Liam Aharon <liam.aharon@hotmail.com> Co-authored-by: Facundo Farall <37149322+ffarall@users.noreply.github.com>
NOTE: We have recently made significant changes to our repository structure. In order to streamline our development process and foster better contributions, we have merged three separate repositories Cumulus, Substrate and Polkadot into this repository. Read more about the changes here.
Polkadot SDK
The Polkadot SDK repository provides all the resources needed to start building on the Polkadot network, a multi-chain blockchain platform that enables different blockchains to interoperate and share information in a secure and scalable way. The Polkadot SDK comprises three main pieces of software:
Polkadot
Implementation of a node for the https://polkadot.network in Rust, using the Substrate framework. This directory
currently contains runtimes for the Westend and Rococo test networks. Polkadot, Kusama and their system chain runtimes
are located in the runtimes repository maintained by
the Polkadot Technical Fellowship.
Substrate
Substrate is the primary blockchain SDK used by developers to create the parachains that make up the Polkadot network. Additionally, it allows for the development of self-sovereign blockchains that operate completely independently of Polkadot.
Cumulus
Cumulus is a set of tools for writing Substrate-based Polkadot parachains.
Releases
Note
Our release process is still Work-In-Progress and may not yet reflect the aspired outline here.
The Polkadot-SDK has two release channels: stable and nightly. Production software is advised to only use stable.
nightly is meant for tinkerers to try out the latest features. The detailed release process is described in
RELEASE.md.
Stable
stable releases have a support duration of three months. In this period, the release will not have any breaking
changes. It will receive bug fixes, security fixes, performance fixes and new non-breaking features on a two week
cadence.
Nightly
nightly releases are released every night from the master branch, potentially with breaking changes. They have
pre-release version numbers in the format major.0.0-nightlyYYMMDD.
Upstream Dependencies
Below are the primary upstream dependencies utilized in this project:
Security
The security policy and procedures can be found in docs/contributor/SECURITY.md.
Contributing & Code of Conduct
Ensure you follow our contribution guidelines. In every interaction and contribution, this project adheres to the Contributor Covenant Code of Conduct.
Additional Resources
- For monitoring upcoming changes and current proposals related to the technical implementation of the Polkadot network,
visit the
Requests for Comment (RFC)repository. While it's maintained by the Polkadot Fellowship, the RFC process welcomes contributions from everyone.