Polkadot v0.9.5

Upgrade priority:❗ HIGH ❗ Please upgrade your node as soon as possible due to changes: ⏳ pending non-critical audit Set new staking limits (#3299), update pvf heap page limit (#3198), ✅ audited Fix teleport accounting and add some events (#3167), Introduce polkadot code substitute (#3093), ✅ audited Update FallbackStrategy to Nothing (#3088), double the allocator limit (paritytech/substrate#9102), ✅ audited staking/election: prolonged era and emergency mode for governance submission. (paritytech/substrate#8912), add an absolute measure of election score on-chain as a parameter (paritytech/substrate#8903)

Native runtimes:

• Polkadot: 9050
• Kusama: 9050
• Westend: 9050

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

• rustc 1.52.1 (9bc8c42bb 2021-05-09)
• rustc 1.53.0-nightly (7f4afdf02 2021-04-22)

WASM runtimes built with srtool using rustc 1.52.0-nightly (d6eaea1c8 2021-03-14).

Proposal hashes:

• polkadot_runtime-v9050.compact.wasm - 0xd16d9c60440bd8ffa0d5422b9e3ab2428a15bdfb6bcd5eea160fcc025d0c835b
• kusama_runtime-v9050.compact.wasm - 0xa2a2e2fe5eeb307decc116de036c4adaf1ce590f27641adfb24f45f07e63b817

Changes

• update pvf heap page limit (#3198)
• fix approval-checking GRANDPA voting rule (#3133)

Client

• double the allocator limit (paritytech/substrate#9102)
• Make it possible to override maximum payload of RPC (paritytech/substrate#9019)
• Transaction pool: Ensure that we prune transactions properly (paritytech/substrate#8963)
• Update wasmtime to 0.27 (paritytech/substrate#8913)
• rpc-http-threads cli arg (paritytech/substrate#8890)

Runtime

• ✅ audited Set new staking limits (#3299)
• ✅ audited Fix teleport accounting and add some events (#3167)
• ✅ audited Update FallbackStrategy to Nothing (#3088)
• ✅ trivial Enforce pub calls in pallets (paritytech/substrate#9085)
• ✅ trivial Migrate pallet-staking to pallet attribute macro (paritytech/substrate#9083)
• ✅ audited Add Call Filter That Prevents Nested batch_all (paritytech/substrate#9009)
• ✅ trivial update ss58 type to u16 (paritytech/substrate#8955)
• ✅ not live Make Schedule fields public to allow for customization (paritytech/substrate#8924)
• ✅ audited Add Control to Growth of the Staking Pallet. (paritytech/substrate#8920)
• ✅ audited staking/election: prolonged era and emergency mode for governance submission. (paritytech/substrate#8912)
• ✅ not live contracts: Add new seal_call that offers new features (paritytech/substrate#8909)
• ✅ trivial Migrate pallet-democracy to pallet attribute macro (paritytech/substrate#8824)
• ✅ not live Uniques: An economically-secure basic-featured NFT pallet (paritytech/substrate#8813)
• ✅ audited Simple MaxBoundedLen Implementations (paritytech/substrate#8793)
• ⏳ pending non-critical audit Named reserve (paritytech/substrate#7778)