emit hard liquidation event (#790)

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Denali Marsh 2021-02-03 23:23:17 +01:00 committed by GitHub
parent 7be0c8b48e
commit 0c1fa5d27b
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3 changed files with 48 additions and 31 deletions

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@ -23,7 +23,7 @@ const (
DefaultParamspace = types.DefaultParamspace
DelegatorAccount = types.DelegatorAccount
EventTypeDeleteHardDeposit = types.EventTypeDeleteHardDeposit
EventTypeDepositLiquidation = types.EventTypeDepositLiquidation
EventTypeHardLiquidation = types.EventTypeHardLiquidation
EventTypeHardBorrow = types.EventTypeHardBorrow
EventTypeHardDelegatorDistribution = types.EventTypeHardDelegatorDistribution
EventTypeHardDeposit = types.EventTypeHardDeposit

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@ -95,29 +95,28 @@ func (k Keeper) SeizeDeposits(ctx sdk.Context, keeper sdk.AccAddress, deposit ty
}
// Seize % of every deposit and send to the keeper
aucDeposits := sdk.Coins{}
keeperRewardCoins := sdk.Coins{}
for _, depCoin := range deposit.Amount {
denom := depCoin.Denom
amount := depCoin.Amount
mm, _ := k.GetMoneyMarket(ctx, denom)
mm, _ := k.GetMoneyMarket(ctx, depCoin.Denom)
// No keeper rewards if liquidated by LTV index
if !keeper.Equals(sdk.AccAddress(types.LiquidatorAccount)) {
keeperReward := mm.KeeperRewardPercentage.MulInt(amount).TruncateInt()
keeperReward := mm.KeeperRewardPercentage.MulInt(depCoin.Amount).TruncateInt()
if keeperReward.GT(sdk.ZeroInt()) {
// Send keeper their reward
keeperCoin := sdk.NewCoin(denom, keeperReward)
err := k.supplyKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleAccountName, keeper, sdk.NewCoins(keeperCoin))
if err != nil {
return err
}
amount = amount.Sub(keeperReward)
keeperCoin := sdk.NewCoin(depCoin.Denom, keeperReward)
keeperRewardCoins = append(keeperRewardCoins, keeperCoin)
}
}
// Add remaining deposit coin to aucDeposits
aucDeposits = aucDeposits.Add(sdk.NewCoin(denom, amount))
}
if !keeperRewardCoins.Empty() {
err := k.supplyKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleAccountName, keeper, keeperRewardCoins)
if err != nil {
return err
}
}
// All deposit amounts not given to keeper as rewards are eligible to be auctioned off
aucDeposits := deposit.Amount.Sub(keeperRewardCoins)
// Build valuation map to hold deposit coin USD valuations
depositCoinValues := types.NewValuationMap()
@ -138,17 +137,26 @@ func (k Keeper) SeizeDeposits(ctx sdk.Context, keeper sdk.AccAddress, deposit ty
// Loan-to-Value ratio after sending keeper their reward
ltv := borrowCoinValues.Sum().Quo(depositCoinValues.Sum())
err = k.StartAuctions(ctx, deposit.Depositor, borrow.Amount, aucDeposits, depositCoinValues, borrowCoinValues, ltv, liqMap)
if err != nil {
return err
liquidatedCoins, err := k.StartAuctions(ctx, deposit.Depositor, borrow.Amount, aucDeposits, depositCoinValues, borrowCoinValues, ltv, liqMap)
// If some coins were liquidated and sent to auction prior to error, still need to emit liquidation event
if !liquidatedCoins.Empty() {
ctx.EventManager().EmitEvent(
sdk.NewEvent(
types.EventTypeHardLiquidation,
sdk.NewAttribute(types.AttributeKeyLiquidatedOwner, deposit.Depositor.String()),
sdk.NewAttribute(types.AttributeKeyLiquidatedCoins, liquidatedCoins.String()),
sdk.NewAttribute(types.AttributeKeyKeeper, keeper.String()),
sdk.NewAttribute(types.AttributeKeyKeeperRewardCoins, keeperRewardCoins.String()),
),
)
}
return nil
// Returns nil if there's no error
return err
}
// StartAuctions attempts to start auctions for seized assets
func (k Keeper) StartAuctions(ctx sdk.Context, borrower sdk.AccAddress, borrows, deposits sdk.Coins,
depositCoinValues, borrowCoinValues types.ValuationMap, ltv sdk.Dec, liqMap map[string]LiqData) error {
depositCoinValues, borrowCoinValues types.ValuationMap, ltv sdk.Dec, liqMap map[string]LiqData) (sdk.Coins, error) {
// Sort keys to ensure deterministic behavior
bKeys := borrowCoinValues.GetSortedKeys()
dKeys := depositCoinValues.GetSortedKeys()
@ -161,6 +169,7 @@ func (k Keeper) StartAuctions(ctx sdk.Context, borrower sdk.AccAddress, borrows,
macc := k.supplyKeeper.GetModuleAccount(ctx, types.ModuleAccountName)
maccCoins := macc.SpendableCoins(ctx.BlockTime())
var liquidatedCoins sdk.Coins
for _, bKey := range bKeys {
bValue := borrowCoinValues.Get(bKey)
maxLotSize := bValue.Quo(ltv)
@ -188,18 +197,20 @@ func (k Keeper) StartAuctions(ctx sdk.Context, borrower sdk.AccAddress, borrows,
// Sanity check that we can deliver coins to the liquidator account
if deposits.AmountOf(dKey).LT(lot.Amount) {
return types.ErrInsufficientCoins
return liquidatedCoins, types.ErrInsufficientCoins
}
// Start auction: bid = full borrow amount, lot = maxLotSize
err := k.supplyKeeper.SendCoinsFromModuleToModule(ctx, types.ModuleAccountName, types.LiquidatorAccount, sdk.NewCoins(lot))
if err != nil {
return err
return liquidatedCoins, err
}
_, err = k.auctionKeeper.StartCollateralAuction(ctx, types.LiquidatorAccount, lot, bid, returnAddrs, weights, debt)
if err != nil {
return err
return liquidatedCoins, err
}
// Add lot to liquidated coins
liquidatedCoins = liquidatedCoins.Add(lot)
// Update USD valuation maps
borrowCoinValues.SetZero(bKey)
@ -231,18 +242,20 @@ func (k Keeper) StartAuctions(ctx sdk.Context, borrower sdk.AccAddress, borrows,
// Sanity check that we can deliver coins to the liquidator account
if deposits.AmountOf(dKey).LT(lot.Amount) {
return types.ErrInsufficientCoins
return liquidatedCoins, types.ErrInsufficientCoins
}
// Start auction: bid = maxBid, lot = whole deposit amount
err := k.supplyKeeper.SendCoinsFromModuleToModule(ctx, types.ModuleAccountName, types.LiquidatorAccount, sdk.NewCoins(lot))
if err != nil {
return err
return liquidatedCoins, err
}
_, err = k.auctionKeeper.StartCollateralAuction(ctx, types.LiquidatorAccount, lot, bid, returnAddrs, weights, debt)
if err != nil {
return err
return liquidatedCoins, err
}
// Add lot to liquidated coins
liquidatedCoins = liquidatedCoins.Add(lot)
// Update variables to account for partial auction
borrowCoinValues.Decrement(bKey, maxBid)
@ -268,12 +281,12 @@ func (k Keeper) StartAuctions(ctx sdk.Context, borrower sdk.AccAddress, borrows,
returnCoin := sdk.NewCoins(sdk.NewCoin(dKey, remaining))
err := k.supplyKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleAccountName, borrower, returnCoin)
if err != nil {
return err
return liquidatedCoins, err
}
}
}
return nil
return liquidatedCoins, nil
}
// IsWithinValidLtvRange compares a borrow and deposit to see if it's within a valid LTV range at current prices

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@ -8,7 +8,7 @@ const (
EventTypeDeleteHardDeposit = "delete_hard_deposit"
EventTypeHardWithdrawal = "hard_withdrawal"
EventTypeHardBorrow = "hard_borrow"
EventTypeDepositLiquidation = "hard_liquidation"
EventTypeHardLiquidation = "hard_liquidation"
EventTypeHardRepay = "hard_repay"
AttributeValueCategory = ModuleName
AttributeKeyBlockHeight = "block_height"
@ -22,4 +22,8 @@ const (
AttributeKeyBorrowCoins = "borrow_coins"
AttributeKeySender = "sender"
AttributeKeyRepayCoins = "repay_coins"
AttributeKeyLiquidatedOwner = "liquidated_owner"
AttributeKeyLiquidatedCoins = "liquidated_coins"
AttributeKeyKeeper = "keeper"
AttributeKeyKeeperRewardCoins = "keeper_reward_coins"
)