Polkadot v0.8.26

Upgrade priority: Medium (timely upgrade recommended) due to changes: Fixes logging of target names with dashes (paritytech/substrate#7281), No longer actively open legacy substreams (paritytech/substrate#7076), Make queryStorage and storagePairs unsafe RPC functions (paritytech/substrate#7342)

Native runtimes:

• Polkadot: 26
• Kusama: 2026
• Westend: 46

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

• rustc 1.47.0 (18bf6b4f0 2020-10-07)
• rustc 1.49.0-nightly (338f939a8 2020-11-02)

WASM runtimes built with srtool using rustc 1.49.0-nightly (fd542592f 2020-10-26).

Proposal hashes:

• polkadot_runtime-v26.compact.wasm - 0x92171cfe0604cacdce2b1180bc464c85976ad2d9ca48f758c63ffa480f149c90
• kusama_runtime-v2026.compact.wasm - 0x7048f41830696272f5ee5f82d152d1335062be7010ea978b619eba02c4772fdc

Changes

• Revert "revert enabling authority discovery by default (#1532)" (#1807)
• [CI] Docker image updates (#1799)

Client

• Refactor CurrencyToVote (paritytech/substrate#6896)
• Fixes logging of target names with dashes (paritytech/substrate#7281)
• Async keystore + Authority-Discovery async/await (paritytech/substrate#7000)
• Add an system_syncState RPC method (paritytech/substrate#7315)
• Make run_node_until_exit take a future (paritytech/substrate#7318)
• No longer actively open legacy substreams (paritytech/substrate#7076)
• Make queryStorage and storagePairs unsafe RPC functions (paritytech/substrate#7342)
• client/network: Remove option to disable yamux flow control (paritytech/substrate#7358)
• client/network: Allow configuring Kademlia's disjoint query paths (paritytech/substrate#7356)
• WASM Local-blob override (paritytech/substrate#7317)

Runtime

• ✅ trivial Reconfigure on_initialize weight. (#1838)
• ✅ trivial Allow schedule_after(0, ...) to work (paritytech/substrate#7284)
• ✅ trivial Runtime worker threads (paritytech/substrate#7089)
• ✅ trivial Implements pallet versioning (paritytech/substrate#7208)
• ✅ trivial Fix wrong outgoing calculation in election (paritytech/substrate#7384)
• ✅ audited Implement batch_all and update Utility pallet for weight refunds (paritytech/substrate#7188)