The sip proposes to put in place a new dynamic gas fee module which replaces the one currently implemented under SIP-2055. The new module would incorporate the necessary changes in transaction costs associated with optimism's fjord upgrade. Depending on governance, optimism is expected to update their gas pricing mechanism on July 10th at 16:00:01 UTC. Therefore, this sip would be implemented immediately following that update.
\nThe dynamic gas fee module is a standard Gnosis Safe Module that is able to alter the minKeeperFee in our PerpsV2MarketSettings within bounds specified in the contract and configurable via governance:
costOfExecutionGross := (l2GasCost + l1GasCost) * ETH/USDprofitMargin := max(profitMarginUSD; costOfExecutionGross * profitMarginPercent )costOfExecutionNet := costOfExecutionGross + profitMarginminKeeperFee := min(costOfExecutionNet ; minKeeperFeeUpperBound)ETH/USD price is obtained with the on-chain chainlink ETH oracleminKeeperFee is incorporated for safety purposesl2GasCostand l1GasCost are detailed below.The main motivation is to continue to incentivize the decentralized community keepers to execute perps v2 settlement & liquidation transactions by covering the cost of execution.
\nThe following functions would be incorporated into the new contract:
\nThis is a getter public function that returns computed gas price given on-chain variables
\nThis is a publicly callable function that updates the minKeeperFee in PerpsV2MarketSettings
This is a getter public function that returns the current configurations specified under the Configurable Values section
\nThis can only be called by the owner, whereby the variables specified under the Configurable Values section, can be updated
\nAllows to pause and unpause the gnosis module
\nReturns the owner of the module that can pause the module
\nAs per the fjord specification, the L1 gas cost can be estimated with the helper function,getL1FeeUpperBound , which facilitates the on-chain computation. Hence that function would be used, feeding it with an SCCP configurable value unsignedTxSize.
Hence, the following would be used to infer the l1 gas costs:\nl1GasCost = getL1FeeUpperBound(unsignedTxSize)
The L2 Gas cost calculation remains unchanged and is obtained by fetching the relevant l2GasPrice (block.baseFee) and multiplying it by a configurable value l2GasUnits.
profitMarginPercent: 20%profitMarginUSD: 1 sUSDminKeeperFeeUpperBound: 30 sUSDunsignedTxSize : 3500l2GasUnits : 1.35e6 GASl2GasPrice: 0.005 GWEI/GASETH/USD: 2500$l1GasCost = getL1FeeUpperBound(3500) = 3500 GWEIl2GasCost = 0.005 * 1.35e6 = 6750 GWEIcostOfExecutionGrossGwei = 3500 GWEI + 6750 GWEI = 10250 GWEIcostOfExecutionGrossUSD = (10250/1e9) ETH * 2500 USD/ETH ~= 0.025 sUSDprofitMargin = max(1 ; 20% * 0.025) = 1 sUSDcostOfExecutionNet = 1+0.025 = 1.025 sUSDminKeeperFee = min(1.025;30) = 1.025 sUSDminKeeperFeeUpperBound being the upper bound on the minKeeperFee that can be updated, (set to 30 sUSD)unsignedTxSize size of the unsigned fully RLP-encoded transaction for settling an offchain delayed order.gasUnitsL2 being the number of gas units required to settle an offchain delayed orderprofitMarginUSD being a profit margin in sUSD, applied on the cost of execution, (set to 1 sUSD)profitMarginPercent being a keeper profit margin in percentage, applied on the cost of execution, (set to 20%)| Parameter | \nConfiguration | \n
|---|---|
| profitMarginUSD | \n1 | \n
| profitMarginPercent | \n30% | \n
| minKeeperFeeUpperBound | \n30 | \n
| unsignedTxSize | \n3,500 | \n
| gasUnitsL2 | \n1,300,000 | \n
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