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Fee Structure
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Fee Structure

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Every fee charged by the Aurellion protocol, where it comes from, where it goes, and how it's calculated.

Overview

Aurellion charges fees at two layers:

Layer Fee Type Rate Recipient
CLOB Trading Taker fee 10 bps (0.1%) Protocol treasury
CLOB Trading Maker fee 5 bps (0.05%) Protocol treasury
CLOB Trading LP fee 5 bps (0.05%) Liquidity pool providers
Physical Delivery Logistics bounty 200 bps (2%) Driver(s)
Physical Delivery Protocol fee 25 bps (0.25%) feeRecipient address
AuSys Orders Transaction fee 200 bps (2%) Node operators (shared)
RWY Staking Protocol cut 100 bps (1%) Protocol treasury

CLOB Fees

Taker Fee

Charged to the order that takes liquidity (matches against an existing order).

takerFee = quoteAmount × takerFeeBps / 10000
         = (price × fillAmount / 1e18) × 10 / 10000
         = quoteAmount × 0.1%

Default: takerFeeBps = 10 (0.1%). Configurable by owner via CLOBAdminFacet.

Maker Fee

Charged to the resting order that provides liquidity.

makerFee = quoteAmount × makerFeeBps / 10000
         = quoteAmount × 0.05%

Default: makerFeeBps = 5 (0.05%). Configurable by owner.

LP Fee

A portion of every trade goes to liquidity pool providers:

lpFee = quoteAmount × lpFeeBps / 10000
      = quoteAmount × 0.05%

Accumulated in collectedLPFees[poolId] and claimable by LP token holders.

Fee Collection

CLOB fees accumulate in collectedFees[quoteToken] within AppStorage. Withdrawn by owner via CLOBAdminFacet.withdrawFees(quoteToken, recipient).

Full Trade Example (CLOB only)

Buyer places market order: 10 tokens at market price
Best ask: 500 USDC/token
Fill price: 500 USDC
Fill amount: 10 tokens
Quote amount: 5,000 USDC

Taker fee (buyer): 5,000 × 0.1% = 5.00 USDC  → Protocol
Maker fee (seller): 5,000 × 0.05% = 2.50 USDC → Protocol
LP fee: 5,000 × 0.05% = 2.50 USDC             → Pool providers

Buyer receives: 10 tokens
Seller receives: 5,000 - 2.50 = 4,997.50 USDC
Buyer pays: 5,000 + 5.00 = 5,005.00 USDC

Physical Delivery Fees (Bridge / BridgeFacet)

Applied when a trade requires physical delivery via a UnifiedOrder.

Logistics Bounty

Driver payment, calculated at order creation:

bounty = orderValue × BOUNTY_PERCENTAGE / 10000
       = (price × quantity) × 200 / 10000
       = orderValue × 2%

BOUNTY_PERCENTAGE = 200 is a hardcoded constant in BridgeFacet.sol. Not configurable.

Paid to the driver immediately when handOff() is called — no need to wait for full settlement.

Protocol Fee

protocolFee = orderValue × PROTOCOL_FEE_PERCENTAGE / 10000
            = orderValue × 25 / 10000
            = orderValue × 0.25%

PROTOCOL_FEE_PERCENTAGE = 25 is hardcoded. Sent to feeRecipient at settlement.

Total Escrow at Order Creation

orderValue    = price × quantity
bounty        = orderValue × 2%
protocolFee   = orderValue × 0.25%
totalEscrow   = orderValue + bounty + protocolFee
              = orderValue × 102.25%

The buyer pays the full totalEscrow upfront when creating the UnifiedOrder.

Full Physical Delivery Settlement Example

10 goats at 500 USDC each
orderValue   = 5,000 USDC
bounty       = 100 USDC  (2%)
protocolFee  = 12.50 USDC (0.25%)
totalEscrow  = 5,112.50 USDC escrowed by buyer

At settlement:
  Buyer receives:  10 ERC-1155 goat tokens
  Seller receives: 5,000 - 12.50 = 4,987.50 USDC
  Driver receives: 100 USDC (at handOff() time)
  Protocol receives: 12.50 USDC

AuSys Transaction Fee (Direct Logistics)

When using AuSysFacet directly (without BridgeFacet), a 2% txFee applies:

txFee = price × tokenQuantity × 2 / 100
      = orderValue × 2%

Unlike the bridge bounty, this fee is distributed to nodes in the delivery chain, not to drivers:

txFee split:
  Each node = txFee / numberOfNodes

For 3 nodes on a 5,000 USDC order:
  txFee = 100 USDC
  Each node receives = 100 / 3 ≈ 33.33 USDC

Emitted as NodeFeeDistributed(node, amount) for each node.

RWY Staking Fee

When operators process commodities and stakers claim profit:

totalProfit   = saleProceeds - costBasis
protocolCut   = totalProfit × protocolFeeBps / 10000
              = totalProfit × 1%
distributable = totalProfit - protocolCut
              = totalProfit × 99%

stakerShare   = distributable × (userStake / totalStaked)

Default protocolFeeBps = 100 (1%). Configurable by owner.

Example

1,000 kg wheat staked
Sale proceeds: 13,000 USDC
Cost basis:    10,000 USDC
Total profit:   3,000 USDC
Protocol fee:      30 USDC (1%)
Distributable:  2,970 USDC

Staker with 200/1000 kg (20%):
  Share = 2,970 × 20% = 594 USDC
  Returns: 200 wheat tokens + 594 USDC

Fee Configuration

All configurable fee parameters (owner-only):

Parameter Contract Function Default
takerFeeBps CLOBAdminFacet setTakerFee(uint16) 10 (0.1%)
makerFeeBps CLOBAdminFacet setMakerFee(uint16) 5 (0.05%)
feeRecipient BridgeFacet setFeeRecipient(address) Contract owner
protocolFeeBps RWYStakingFacet setProtocolFeeBps(uint256) 100 (1%)
minOperatorCollateralBps RWYStakingFacet setMinOperatorCollateralBps(uint256) 2000 (20%)
maxYieldBps RWYStakingFacet setMaxYieldBps(uint256) 5000 (50%)

Hardcoded constants (not configurable without contract upgrade):

  • BOUNTY_PERCENTAGE = 200 in BridgeFacet
  • PROTOCOL_FEE_PERCENTAGE = 25 in BridgeFacet
  • AuSys txFee = 2% in AuSysFacet

Mainnet Fee Projections

Assuming 1M USDC daily trading volume on Base mainnet:

Source Daily Volume Fee Rate Daily Revenue
CLOB taker fees $1,000,000 0.1% $1,000
CLOB maker fees $1,000,000 0.05% $500
Physical delivery $100,000 0.25% $250
RWY protocol cut $50,000 profit 1% $500
Total ~$2,250/day
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