How to Verify a Runtime Upgrade

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This guide uses the runtime upgrade release 1.1.3 as an example.
Once the upgrade is proposed, you shall see it on the Polkadot App - Karura parachain - Democracy section.
Upgrade Preimage Info
Expand the proposal, and find the Preimage info.
Preimage: parachainSystem.authorizeUpgrade(0xd9660e7d73163f7b2e1591c08c60e68f4b47cb85dcba54d55c53b9573876f55e)
 
Hash: 0x4f8bf2c02c5a1e8cdcf7a94dabf2805c563c46a87876c684c5d79ffb745db115
Verify against code
In the discussion post of the proposal, it shall provide the release tag, runtime WASM file and other necessary information for others to verify it against the preimage proposed.
Release page: https://github.com/AcalaNetwork/Acala/releases/tag/1.1.3​
Runtime Wasm: https://gateway.pinata.cloud/ipfs/QmTrUJragkgGrp3eNyun7n7p5zT8MFLE3s87o3ZJSyj4wf​
Take the following step to verify
1. Build your own Wasm Runtime for the release
srtool is used to build wasm
More about srtool:
​https://www.chevdor.com/post/2019/12/06/srtool/​
​https://github.com/paritytech/srtool​
follow these steps to build
Install Docker
​https://docs.docker.com/get-docker/​
Clone Acala repo
git clone https://github.com/AcalaNetwork/Acala.git
Checkout release branch
git checkout release-karura-1.1.3
Build with srtool
make srtool-build-wasm-karur
Wait for compiling done and your wasm is built
2. Generate hash & compare
In the Developer - Extrinsics tab, use the following and upload the wasm to generate the call hash. Compare this with the preimage hash proposed. 

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How to Verify Referendum Proposal

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Outline

Upgrade Preimage Info

Verify against code

Take the following step to verify