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Maker / Surplus Auctions
  • Stablecoin
  • DAO
  • Finance
  • ERC20
  • Token
  • CDP
  • Protocol
  • Audited
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ChefGPT

Builders of Dai, a digital currency that can be used by anyone, anywhere.

FlapperDeploy.sol
FlapperInit.sol
FlapperInstance.sol
DSAuthorityAbstract.sol
DSChiefAbstract.sol
DSPauseAbstract.sol
DSPauseProxyAbstract.sol
DSRolesAbstract.sol
DSRuneAbstract.sol
DSSpellAbstract.sol
DSThingAbstract.sol
DSTokenAbstract.sol
DSValueAbstract.sol
AuthGemJoinAbstract.sol
CatAbstract.sol
ChainlogAbstract.sol
ClipAbstract.sol
ClipperMomAbstract.sol
CureAbstract.sol
DaiAbstract.sol
DaiJoinAbstract.sol
DogAbstract.sol
DssAutoLineAbstract.sol
DssCdpManager.sol
EndAbstract.sol
ESMAbstract.sol
ETHJoinAbstract.sol
ExponentialDecreaseAbstract.sol
FaucetAbstract.sol
FlapAbstract.sol
FlashAbstract.sol
FlipAbstract.sol
FlipperMomAbstract.sol
FlopAbstract.sol
GemJoinAbstract.sol
GemJoinImplementationAbstract.sol
GemJoinManagedAbstract.sol
GetCdpsAbstract.sol
IlkRegistryAbstract.sol
JugAbstract.sol
LerpAbstract.sol
LerpFactoryAbstract.sol
LinearDecreaseAbstract.sol
LPOsmAbstract.sol
MedianAbstract.sol
RwaInputConduitAbstract.sol
RwaJarAbstract.sol
RwaLiquidationOracleAbstract.sol
RwaOutputConduitAbstract.sol
RwaUrnAbstract.sol
MkrAuthorityAbstract.sol
OsmAbstract.sol
OsmMomAbstract.sol
PotAbstract.sol
PsmAbstract.sol
SpotAbstract.sol
StairstepExponentialDecreaseAbstract.sol
VatAbstract.sol
VestAbstract.sol
VowAbstract.sol
GemAbstract.sol
Interfaces.sol
GemPitAbstract.sol
SaiMomAbstract.sol
SaiTapAbstract.sol
SaiTopAbstract.sol
SaiTubAbstract.sol
SaiVoxAbstract.sol
WardsAbstract.sol
StdJson.sol
Vm.sol
GodMode.sol
MCD.sol
MCDUser.sol
ScriptTools.sol
FlapperMom.sol
FlapperUniV2.sol
FlapperUniV2SwapOnly.sol
OracleWrapper.sol

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Maker / Surplus Auctions
  • Stablecoin
  • DAO
  • Finance
  • ERC20
  • Token
  • CDP
  • Protocol
  • Audited
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Source
ChefGPT
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Dss Flappers

Implementations of MakerDao surplus auctions, triggered on vow.flap. The current featured Flapper is FlapperUniV2.

FlapperUniV2

Exposes a kick operation to be triggered periodically. Its logic withdraws DAI from the vow and buys gem tokens on Uniswap v2. The acquired tokens, along with a proportional amount of additional DAI withdrawn from the vow, are deposited back into the liquidity pool. Finally, the minted LP tokens are sent to a predefined receiver address.

Configurable Parameters:

  • hop - Minimum seconds interval between kicks.
  • pip - A reference price oracle, used for bounding the exchange rate of the swap.
  • want - Relative multiplier of the reference price to insist on in the swap. For example, a value of 0.98 * WAD allows for a 2% worse price than the reference.

Notes:

  • As a kick operation also withdraws DAI for depositing in the pool (and not only for swapping), it can in practice reduce the Surplus Buffer to below vow.bump.

  • Although the Flapper interface is conformant with the Emergency Shutdown procedure and will stop operating when it is triggered, LP tokens already sent to the receiver do not have special redeeming handling. Therefore, in case the Pause Proxy is the receiver and governance does not control it, the LP tokens can be lost or seized by a governance attack.

FlapperUniV2SwapOnly

Exposes a kick operation to be triggered periodically. Its logic withdraws DAI from the vow and buys gem tokens on Uniswap v2. The acquired tokens are sent to a predefined receiver address.

Configurable Parameters:

  • hop - Minimum seconds interval between kicks.
  • pip - A reference price oracle, used for bounding the exchange rate of the swap.
  • want - Relative multiplier of the reference price to insist on in the swap. For example, a value of 0.98 * WAD allows for a 2% worse price than the reference.

FlapperMom

This contract allows bypassing the governance delay when disabling the Flapper in an emergency.

OracleWrapper

Allows for scaling down an oracle price by a certain value. This can be useful when the gem is a redenominated version of an existing token, which already has a reliable oracle.

General Note:

  • Availability and accounting of the withdrawn DAI is the responsibility of the vow. At the time of a kick, the vow is expected to hold at least the swapped amount (vow.bump) over the configured flapping threshold (vow.hump).
Builders of Dai, a digital currency that can be used by anyone, anywhere.
FlapperDeploy.sol
FlapperInit.sol
FlapperInstance.sol
DSAuthorityAbstract.sol
DSChiefAbstract.sol
DSPauseAbstract.sol
DSPauseProxyAbstract.sol
DSRolesAbstract.sol
DSRuneAbstract.sol
DSSpellAbstract.sol
DSThingAbstract.sol
DSTokenAbstract.sol
DSValueAbstract.sol
AuthGemJoinAbstract.sol
CatAbstract.sol
ChainlogAbstract.sol
ClipAbstract.sol
ClipperMomAbstract.sol
CureAbstract.sol
DaiAbstract.sol
DaiJoinAbstract.sol
DogAbstract.sol
DssAutoLineAbstract.sol
DssCdpManager.sol
EndAbstract.sol
ESMAbstract.sol
ETHJoinAbstract.sol
ExponentialDecreaseAbstract.sol
FaucetAbstract.sol
FlapAbstract.sol
FlashAbstract.sol
FlipAbstract.sol
FlipperMomAbstract.sol
FlopAbstract.sol
GemJoinAbstract.sol
GemJoinImplementationAbstract.sol
GemJoinManagedAbstract.sol
GetCdpsAbstract.sol
IlkRegistryAbstract.sol
JugAbstract.sol
LerpAbstract.sol
LerpFactoryAbstract.sol
LinearDecreaseAbstract.sol
LPOsmAbstract.sol
MedianAbstract.sol
RwaInputConduitAbstract.sol
RwaJarAbstract.sol
RwaLiquidationOracleAbstract.sol
RwaOutputConduitAbstract.sol
RwaUrnAbstract.sol
MkrAuthorityAbstract.sol
OsmAbstract.sol
OsmMomAbstract.sol
PotAbstract.sol
PsmAbstract.sol
SpotAbstract.sol
StairstepExponentialDecreaseAbstract.sol
VatAbstract.sol
VestAbstract.sol
VowAbstract.sol
GemAbstract.sol
Interfaces.sol
GemPitAbstract.sol
SaiMomAbstract.sol
SaiTapAbstract.sol
SaiTopAbstract.sol
SaiTubAbstract.sol
SaiVoxAbstract.sol
WardsAbstract.sol
StdJson.sol
Vm.sol
GodMode.sol
MCD.sol
MCDUser.sol
ScriptTools.sol
FlapperMom.sol
FlapperUniV2.sol
FlapperUniV2SwapOnly.sol
OracleWrapper.sol