Beanstalk Farms · September 18th, 2022

Bi-Weekly Bean #11

A newsletter that recaps the happenings in the Beanstalk ecosystem. This issue covers the 9/01/22–9/17/22 period.

What is Beanstalk? Beanstalk is a permissionless fiat stablecoin protocol built on Ethereum. Learn more at

The BeaNFT Barn Raise Collection is now live! You can check them out on OpenSea here.

BeaNFTs were minted by Beanstalk Farms for Farmers this time. You can find them in the wallets that you used to buy more than 1000 Fertilizer with pre-Replant.

EBIP-2: deltaB Cap, was executed by the BCM ahead of the Merge. EBIP-2 introduced a cap on the absolute value of time-weighted average deltaB for the BEAN:3CRV pool of 1% of total Bean supply to help protect against multi-block MEV oracle manipulation, which became possible post-Merge. You can view details here and the transaction here.

Moreover, Halborn discovered an issue with the Beanstalk contract as part of their audit stream. The BCM has updated Beanstalk to remove the chop() function which was vulnerable as part of EBIP-1. After searching for the chop() event, it seems no one has called the chop() function yet. Therefore, the vulnerability was never exploited. You can view the transaction here.

A new episode of the The Bean Pod is live:

Moreover, Publius was interviewed on Mission DeFi by Brad Nickel.

Lastly, feel free to drop by Discord if you have any questions—the community is always available to help and answer questions.

Protocol Summary


The overall protocol has remained stable over the last two weeks with the price of Bean tightly pegged and little change to the Bean supply and the Pod Rate.



Demand for Soil continues to be strong and is reflected in the Temperature that is now down by about ~2000% since Unpause on August 6.


Beanstalk Farms Updates

  • vAPYs added to the Silo page
  • Farmer Silo Overview module added
  • Various other UI updates
  • Beanstalk zero fee AMM in development

Comments, suggestions or feedback? Please reach out to [email protected]