Collator v5.3.0 for Polkadot v0.9.18

This release contains the changes from polkadot-v0.9.17 to polkadot-v0.9.18.

Priority

‼️ High: If you are still running a collator older than polkadot-collator v5.2.0-76479e7f-x86_64-linux-gnu, you must upgrade your collator to this version before the runtime V800 is activated on chain as it introduces a new host function via #10741.

If you currently run the polkadot-collator v5.2.0-76479e7f-x86_64-linux-gnu, you may update at your convenience.

Rust compiler versions

This release was tested against the following versions of rustc. Other versions may work.

• Rust Stable: rustc 1.57.0 (f1edd0429 2021-11-29)
• Rust Nightly: rustc 1.58.0-nightly (46b8e7488 2021-11-07)

Database Migrations

• [S] #10779 - Refactored block body database scheme

There is 1 database migration(s) in this release.

Database migrations are operations bringing your database to the latest stand.
Some migrations may break compatibility and making a backup of your database is highly recommended.

Changes

Legend

• [C] Cumulus
• [P] Polkadot
• [S] Substrate

Client

• [S] #10832 - Mark sync_state_gensyncspec json-rpc as safe
• [S] #10897 - Storage benchmarking
• [S] #10779 - Refactored block body database scheme
• [S] #10975 - Deprecate "paritydb-experimental" cli in favour or "paritydb…

Misc

There are other misc. changes. You can expand the list below to view them all.

Other misc. changes

• [S] #10690 - Upgradable contracts using set_code function
• [S] #10473 - Fix reentrancy of frozenbalance::died hook
• [P] #4772 - Allow two parachains to swap
• [P] #4851 - Add proxy type for kappa sigma mu
• [S] #10832 - Mark sync_state_gensyncspec json-rpc as safe
• [S] #10863 - Contracts: don't round to kilobyte for code size based weigh…
• [P] #4914 - Revert "collator-protocol: short-term fixes for connectivity…
• [S] #10877 - Contracts: allow stack height metering to be disabled
• [S] #10825 - Upgrading parity-scale-codec to v3
• [S] #10897 - Storage benchmarking
• [P] #4982 - Co #10897: storage benchmarking
• [S] #10947 - Bring back maxnominations as a metadata constant
• [P] #4993 - Add disputes pallet to polkadot
• [P] #4838 - Paritydb support for parachains db.
• [S] #10779 - Refactored block body database scheme
• [S] #10975 - Deprecate "paritydb-experimental" cli in favour or "paritydb…
• [S] #10971 - [contracts] stabilize "seal0" is_contract and `caller_is_o…
• [C] #1055 - Use weighttofee when calculating cost of each weight unit in…