This release upgrades Statemine and Westmint to Polkadot v0.9.11 and introduces transaction payment in assets.

❗️Important Changes

• Support for Asset Transaction Payment (#488)
  • This changes the transaction format by swapping out a SignedExtension which leads to a transaction_version bump to 3.

Notable Changes

• Metadata v14: paritytech/substrate#8615
• Make Parachain sync protocol future proof: #640
• Fix state_subscribeRuntimeVersion for Parachains: paritytech/substrate#9617
• Improve performance for Parachains when building blocks: paritytech/substrate#9611
• • Transaction priority calculation was changed to be based on the tip to weight/length ratio (#645)
  • see paritytech/substrate#9834 for details
• Add Transaction Fee RPC to Statemint/Statemine (#559)
  • Note that this does not support asset transaction fees, yet.
• Support for Reserve Asset Transfers via XCM (#552)
• Support for XCM v2 (#571) (see paritytech/polkadot#3629 for details)

Other Notes

• The spec_version convention was changed from single digits to hundreds (so v5 is spec_version 5xx now)
• The spec_version 5 runtime live at time of release is the hotpatch to runtime version 4 (you could think of it as 401 in the new format).

Runtimes:

The following can be checked using subwasm and subwasm info <runtime.wasm>.

Statemine:

🏋️  Runtime size:		0.635 MB (665,883 bytes)
🗜  Compressed:			Yes, 76.89%
🎁 Metadata version:		V14
🔥 Core version:		statemine-504 (statemine-0.tx3.au1)
🗳️  authorizeUpgrade hash:	0xc1f7c5a4dc86d6084f3d9585a85a9d94dcce9b16f25b5f9ebfaa8076dc240652
#️⃣  Blake2-256 hash:		0x671aa5730f5f72e4b17a9fcb4ff7dbfa006f68e01f280873eeedaaea9d325636

Westmint:

🏋️  Runtime size:		0.629 MB (659,479 bytes)
🗜  Compressed:			Yes, 76.81%
🎁 Metadata version:		V14
🔥 Core version:		westmint-504 (westmint-0.tx3.au1)
🗳️  authorizeUpgrade hash:	0x9ff3edf1398b1d4e89d44beabc8560bed01c3ed4e49dd705ac6360e179bd0856
#️⃣  Blake2-256 hash:		0xce8150763e796befba9f8411a8a26a430de3c85165831ca237894b2e07fa9f05

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

• rustc 1.55.0 (c8dfcfe04 2021-09-06)

NOTE: The WASM runtimes built with srtool using rustc 1.53.0 (53cb7b09b 2021-06-17).