## Summary
This is a runtime upgrade for Karura that upgrades Substrate/Cumulus/Polkadot to v0.9.40. This also includes Eth Call V2 format and various improvements to Acala EVM+.

Release Note: https://github.com/AcalaNetwork/Acala/releases/tag/2.18.0

# Referendum
https://karura.subscan.io/referenda/88
https://karura.subsquare.io/democracy/referendum/88

proposal

Runtime Upgrade - Update Substrate/Cumulus/Polkadot version to v0.9.42

calls

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## Proposal

The following suggestion is proposed to optimize for risk management for Karura.
+ Decrease Debt Ceiling of KSM from 25M to 10M
+ Decrease Debt Ceiling of LKSM from 5M to 2M
+ Decrease Debt Ceiling of KAR from 3M to 1M

Risk parameters are best adjusted according to market conditions to balance insolvencies, liquidations, and capital efficiency. A lower debt ceiling helps mitigate the risk associated with excessive debt exposure and enable the protocol to remain solvent and resilient in volatile market conditions.

Karura Risk Parameter Change Proposal - May 2023

stableAssetId

metadata

0x5461696761204b534d

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https://acala.discourse.group/t/proposals-to-fix-problems-caused-by-a-special-case-handling-issue-in-taiga-stable-asset-pallet-on-karura/2078/10?u=xlc

Resume full functionality of Taiga stable asset pallet on Karura

This is a runtime upgrade for Karura that fixes issue for Taiga stable asset pallet.

Release note: https://github.com/AcalaNetwork/Acala/releases/tag/2.17.0 

Runtime upgrade to fix Taipa stable asset pallet

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https://acala.discourse.group/t/proposal-1-to-fix-problems-caused-by-a-special-case-handling-issue-in-taiga-stable-asset-pallet-on-karura/2078

Proposal 1 to fix problems caused by a special case handling issue in Taiga stable asset pallet on Karura

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palletName

functionName

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dest

message

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updates

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