Protocol Fees

Fees lay the foundations for a healthy and prosperous ecosystem. They are a fundamental revenue source for the protocol.

Swap Fees
Every time a trade takes place on the protocol, a swap fee is denominated in the pool's respective BPT. Each pool has its own swap fee uniquely set based on the underlying assets and AMM logic being used. A portion of these fees flow to liquidity providers and the other portion flows to Beethoven X. The specific percentage that flows to the protocol is different for Fantom and Optimism.
Interest bearing Fees
On any IB token deposited into a Liquidity Pool on the DEX, Beethoven X takes a fee on the yield generated.  This innovative protocol fee ensures a sustainable source of protocol revenue that is purely a function of TVL; no longer is the protocol dependent on swap volume to ensure longevity. 
This is unique to Beethoven X and Balancer, no other DEXs have the flexibility to utilize this mechanism. 
Flash Loan Fees
A small Protocol Fee is taken on Flash Loans.
​
Protocol Fees on Fantom and Optimism
On both Fantom and Optimism, the percentage of the total fee that flows to the protocol is taken in different proportions. You can see the breakdown of fees below:
Fee Type
Protocol Fee on Fantom
Protocol Fee on Optimism
Swap Fee
25%
50% (Half goes to Balancer)
Interest Bearing Fee
50%
50% (Half goes to Balancer)
Flash Loan
0.03%
0%
Protocol fees are collected in contracts known as the Protocol Fee Collector and are separated by chain. The contracts for Fantom can be found here and Optimism here.
Protocol Fee Distribution
Protocol fees are distributed on a monthly basis and are allocated differently on each chain according to the following distribution model:
Fantom:
Distribution
Allocation
Treasury 
70%
Gauge vote bounty for fBEETS holders
30%
​
Optimism:
Distribution
Allocation
Balancer 
50%
OP Grant matching
25%
Gauge vote bounty for fBEETS holders
7.5%
Treasury                                               veBAL
5.835%
                                                           vlAURA
5.835%
                                                          auraBAL
5.835%
​
Future governance
In the future, protocol fees as well as distribution will be defined through governance votes.
Transactions
Increase protocol swap fee percentage to 25% - 
0xa39303f24dcf72795e98414a99830484644ccb6c4e570999db758ac7d734b987​
Set protocol swap fee percentage to 15% - 0x2cae7dbc0ef64f4660a8befa5274177b08b66122bfc99f157904ef0c60e87cb3​
Set protocol flash loan fee percentage to 0.03% - 0x63856e70c2f52e91cc8ecb3838298d0b8a2e0dc20f11e737fca066d6f550125c​

Fee Type	Protocol Fee on Fantom	Protocol Fee on Optimism
Swap Fee	25%	50% (Half goes to Balancer)
Interest Bearing Fee	50%	50% (Half goes to Balancer)
Flash Loan	0.03%	0%

Distribution	Allocation
Treasury	70%
Gauge vote bounty for fBEETS holders	30%

Distribution	Allocation
Balancer	50%
OP Grant matching	25%
Gauge vote bounty for fBEETS holders	7.5%
Treasury veBAL	5.835%
vlAURA	5.835%
auraBAL	5.835%

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