FRAX < > Beanstalk - Barn Raise Participation

Updated proposal from FRAX<> Beanstalk - Barn Raise Participation


Beanstalk Farms proposes that Frax Finance lend FRAX to Beanstalk via Fraxlend for its upcoming Barn Raise as its first credit activity, under the following terms:

Allocation: 5M FRAX

Interest rate: 500%

Token type: Liquid semi-fungible, with rights to a pro rata share of one-third of new Bean mints until Barn Raise debt is repaid

Vesting period: Interest earned from Bean mints has no vesting period

If passed, this proposal would mean that the Frax community commits to lending 5M FRAX to Beanstalk at a 500% interest rate, paid off over the course of what is estimated to be several months beginning in early July. At the rate of new Bean mints in the week prior to Beanstalk’s governance exploit on April 17, Frax’s loan plus interest would be repaid in ~28 weeks. Note, however, that this is a very crude estimate and past growth is in no way an indicator of future growth.

Participating in the Barn Raise is a great proof of concept for the credit-based Frax model, which has been discussed significantly in the wake of the collapse of LUNA. Beanstalk will begin paying out interest on loans immediately after the protocol restarts in early July.

In practice, a credit backing would facilitate significant profit opportunities for the algorithmic supply of FRAX at the protocol level, and simultaneously dramatically improve the value proposition of buying FXS during a down cycle.

Beanstalk Farms believes that this proposal would be the beginning of a highly symbiotic relationship between Frax and Beanstalk.

About Beanstalk

Beanstalk is a decentralized stablecoin protocol built on Ethereum, using credit instead of collateral to create $BEAN, a stable and scalable asset pegged to the US Dollar.



Beanstalk was initially launched in August 2021 with just 100 Beans and no traditional funding. Over the past eight months, Beanstalk organically grew to $100M in market cap, attracting $144M in long term-incentivized liquidity.

Until the on-chain governance attack on April 17, Beanstalk’s model was working exactly as designed. During the two weeks prior to the attack, the protocol:

  • Paid ~$25M back to creditors, reaching a total of ~$50M paid back since Beanstalk‚Äôs inception;
  • Distributed ~$25M in interest to Depositors in the Silo;
  • Attracted ~$110M in new liquidity across three liquidity pools (BEAN:ETH, BEAN:3CRV and BEAN:LUSD);
  • Received approval from the Curve community for the BEAN:3CRV liquidity pool to receive gauge; and
  • Reduced the protocol debt ratio by more than 50%.

From Day 1, Beanstalk has been owned solely by members of the Beanstalk DAO via a decentralized, on-chain governance structure. However, a bad actor exploited that very structure to steal all Silo assets, including ~$77M in non-Bean liquidity. This was an attack on Beanstalk’s governance model, not its economic design.

Despite this hurdle, the Beanstalk community has emerged stronger than ever and core contributors are working around the clock and without pay to get the protocol back online.

Barn Raise Overview

Since the exploit, Beanstalk Farms, Bean Sprout and Publius have worked to create a suitable mechanism to enable Beanstalk to Unpause, or restart, safely: The Barn Raise.

The Barn Raise is a fundraiser to restore the $77M in stolen liquidity, beginning on Monday, June 6 at 4:00pm UTC, and will continue until the protocol has been fully recapitalized. Institutional and retail participants will have the opportunity to lend capital to Beanstalk in the form of Fertilizer, a semi-fungible token worth 1 USDC, and receive a pro rata share of one-third of new Bean mints until each Fertilizer is repaid with interest.

The Barn Raise will continue until all 77M Fertilizer are sold. However, Beanstalk Unpause once its audits with Trail or Bits and Halborn are complete, regardless of whether the Barn Raise has concluded. This is expected to occur in early July.

The interest rate on capital lent to Beanstalk during the Barn Raise will be variable, depending on when it participates. All Fertilizer purchased prior to the Beanstalk’s Unpausing will have an interest rate of 500%. After Unpausing, the interest rate will drop to 250% and decrease by 0.5% every Season until it reaches 20%. This will take ~19 days.

Recapitalized liquidity assets in the Silo will be subject to a vesting schedule based on the product of the percentage of Fertilizer sold and debt repaid to Fertilizer. For example, if 20% of total Fertilizer has sold and 30% of the debt issued for Fertilizer has been repaid, then the penalty for recapitalized Beans and LP Tokens is 1 - (20% * 30%) = 94%.

For more information on the Barn Raise, please refer to this guide.


Prior to Unpausing Beanstalk, a number of governance and security measures will be taken to protect the protocol from potential bad actors, including, but not limited to:

  • Removing on-chain governance and instituting community-run multisig wallets for all Beanstalk and Barn Raise contracts, custodied by core community members and contributors;
  • Undergoing two end-to-end audits with Halborn (began on May 9) and Trail of Bits (beginning in early June);
  • Launching an ongoing bug bounty program with Immunefi and other leading platforms; and
  • Allocating capital to retain security experts as core contributors and consultants;
  • Creating a separate contract for the Barn Raise from Beanstalk itself.

For more information on governance and security changes, please refer to The Path Forward, which can be found on Beanstalk’s blog at

Commentary on Recent Events

In light of Terra’s recent collapse, we find it important to clearly articulate why Beanstalk’s three primary anti-reflexive mechanisms make it better suited to mitigate and survive a bank run. It is important to keep in mind that no economic system is impervious to bank run behavior, and Beanstalk makes no promises of holding a silver bullet. What it does do, however, is thoughtfully design incentives that aim to return the price of Bean to peg in all situations.

  1. The Field - Beanstalk’s native credit facility

Beanstalk relies on credit instead of collateral to maintain price stability. At its core, the Field relies on an implicit assumption that at some interest rate, there will always be a bid for debt, even during bank runs.

Take, for example, the period in September 2021 when the price of Bean fell to $0.24. The Weather, or interest rate, on protocol debt slowly increased as designed to entice lenders to burn their Beans for a future gain. However, lending at a price of $0.24 acts as a multiplier on the interest rate (in this case, ~4x), which strongly incentivizes peg maintenance.

The Field also repays debt on a FIFO basis, so lenders are incentivized to lend immediately. Whereas with Terra, there was no mechanism to reward immediate UST-Luna conversion or interest rate, so the optimal strategy for anyone looking to take a long position in Luna during the bank run would be to wait for the price to continue dropping before entering.

  1. The Silo / Stalk System - Beanstalk’s native liquidity center

Beanstalk’s native liquidity center, the Silo, is designed to incentivize participants to make long-term deposits. Every Bean or LP Token deposit receives Stalk and Seed. Stalk is a governance token which also receives a share of new Bean mints, and Seed generates new Stalk every Season. However, when the initial deposit is removed from the Silo, all associated Stalk and Seed must be relinquished. As a result, since Stalk grows over time, deposits are heavily incentivized to remain in the Silo. This protocol-native utility was absent from Terra, which only offered real utility in the way of Anchor’s yield, which was heavily subsidized and unsustainable.

In the event of a bank run on Beanstalk, Beans must be withdrawn in order to sell. As a result, the more Beans are removed, the more each remaining Stalk is worth. So as a bank run deepens, the incentives for staying the Silo actually grow.

  1. Convert - Additional Silo functionality

Convert functionality in the Silo allows participants to swap Bean for LP Tokens, and vice versa, to take advantage of Bean price arbitrage opportunities. When converting, Grown Stalk is not lost, so the option is purely yield-maximizing.

Since being implemented, Convert has had two major impacts on Beanstalk as a system: reducing price volatility and increasing the ratio of liquidity to total Bean supply, the latter of which suggests the protocol’s longer-term sustainability. From an individual participant’s standpoint, Convert allows peg maintenance to become a profit-maximizing activity, further bolstering short-term price stability.

Future Potential Beanstalk <> FRAX Integrations

Beanstalk Farms is excited about the possibility of building a strong relationship between Beanstalk and Frax Finance. Core Beanstalk contributors have expressed interest in a number of potential collaborations, including:

  • Depositing Ripened Beans (i.e. repaid Beans from the Barn Raise) into the Silo will allow Frax to participate in Beanstalk‚Äôs long-term growth;
  • Creating and launching a BEAN:FRAX and BEAN:FPI liquidity pools shortly after Beanstalk‚Äôs relaunch, which will create a new growth vector for both protocols; and
  • Allowing FRAX to be a whitelisted token for Barn Raise participants to lend.


Beanstalk proposes that Frax Finance participate in Beanstalk’s upcoming Barn Raise as Frax’s first loan via Fraxlend. If Fraxlend is not live by the time the loan is needed (end of June), then the loan will be deployed in an alternative manner decided between the two protocols.

Next Steps

Beanstalk Farms appreciates the Frax Finance community’s consideration of this proposal and is happy to help answer any questions about Beanstalk or the Barn Raise.


For: Lend 5M FRAX to Beanstalk at 500% interest rate via its upcoming Barn Raise.

Against: Do nothing.

1 Like

Updates detailed in BFP-72

Hey, thanks for posting this here! I saw that the Barn Raise started and will be going until July (or when it sells out).

I see that there are more way we can collaborate in the future. For example, depending on the passage of the FraxBasePool on Curve, I think Bean would make an excellent candidate to pair with it once it launches.

I’m curious what others in the community think of the proposal.