EBIP-10: Fix Bean to LP Well Convert

Committed: October 23, 2023

• Submitter
• Emergency Process Note
• Links
• Problem
• Solution
• Contract Changes
• Effective

Submitter

Beanstalk Community Multisig

Emergency Process Note

Per the process outlined in the BCM Emergency Response Procedures, the BCM can take swift action to protect Beanstalk in the event of a bug or security vulnerability.

Links

• GitHub PR
• Safe Transaction
• Etherscan Transaction

Problem

Since BIP-38 was committed and prior to this EBIP, in Wells (i.e., only BEANETH currently), Farmers could Convert Deposited Beans to Deposited LP tokens past peg. Additionally, If a Farmer had enough Deposited Beans to Convert past peg, it was possible for that Farmer to Convert Deposited Beans to Deposited LP tokens up to the total amount of Beans in the Beanstalk contract.

This was because Beanstalk was Converting (1) the amount the user input, rather than (2) the minimum of the amount the user input and the amount required to Convert to peg.

Solution

Upgrade Beanstalk to only allow Converts up to (2).

All changes were reviewed by Cyfrin.

Contract Changes

Convert Facet

The following ConvertFacet is removed from Beanstalk:

• 0xDc6B4ef6bA55706B19Bd389eA446d232eFb4E5D4

The following ConvertFacet is added to Beanstalk:

• 0x08342a9e47d9a48f6a94823344fafd24fb55266f

ConvertFacet Function Changes

Event Changes

None.

Beans Minted

None.

Effective

Effective immediately upon commitment by the BCM, which has already happened.