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title: Polygon v2 - Parameter Update author: TokenLogic discussions: https://governance.aave.com/t/arfc-polygon-v2-parameter-update/12817 shortDescription: Encourage Polygon v2 users to migrate to v3

Simple Summary

This AIP will update risk parameters on Polygon v2 to encourage users to migrate funds to v3. No users funds are at risk.

Abstract

With SD, MaticX and stMATIC rewards being distributed across v3, Aave DAO can further encourage the migration of users to the safer v3 protocol.

This will be achieved by updating the Uoptimal, Reserve Factor (RF) and Slope2 parameters. This is expected to increase borrowing rates, with deposit rates remaining unchanged.

Motivation

Currently, there are two communities distributing three tokens across Polygon v3.

• SD - Stader Labs
• MaticX & stMATIC - Polygon Foundation

This has led to Polygon v3 offering better deposit rates relative to v2. The TVL on v3 is increasing, largely due to incentives and LSTs being added to the liquidity pool whilst v2’s TVL remains more correlated to asset spot pricing.

Liquidity Mining on v3 is encouraging users to migrate and this AIP will further encourage migration by holding v2 deposit rates constant and increasing v2 borrowing costs.

The approach presented has successfully passed TEMP CHECK and ARFC votes, with the community electing to migrate via Option 2, the conservative approach.

This AIP contains revised parameter updates in line with the ARFC Snapshot methodology. The methodogoly applied has been reviewed by Chaos Labs and Gauntlet at the time the ARFC was voted on.

Specification

The following parameters are to be updated:

Asset	Uoptimal	RF	Slope 2
DAI	71.00%	21.00%	105.00%
USDC	77.00%	23.00%	134.00%
USDT	52.00%	22.00%	236.00%
wBTC	37.00%	55.00%	536.00%
wETH	40.00%	45.00%	167.00%
MATIC	48.00%	41.00%	440.00%
BAL	65.00%	32.00%	236.00%
CRV	25.00%	38.00%	392.00%
GHST	23.00%	60.00%	413.00%
LINK	25.00%	50.00%	402.00%

Implementation

A list of relevant links like for this proposal:

• Governance Forum Discussion
• Test Cases
• Pre-Post Payload Diff
• Payload Implementation
• Deployed Contracts

The proposal Payload was reviewed by Bored Ghost Developing.

Disclaimer

The author, TokenLogic, receives payment indirectly from Aave Grant DAO via Butter as part of the Incentivised Delegate Campaign. TokenLogic is a delegate within Aave community.

Delegate: 0xA06c2e5BB33cd6718b08EC9335081Cbba62861f7

Copyright

Copyright and related rights waived via CC0.