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iter.go
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iter.go
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package keeper
import (
"sort"
sdkmath "cosmossdk.io/math"
prefixstore "github.com/cosmos/cosmos-sdk/store/prefix"
storetypes "github.com/cosmos/cosmos-sdk/store/types"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/umee-network/umee/v6/util"
"github.com/umee-network/umee/v6/util/keys"
"github.com/umee-network/umee/v6/util/store"
"github.com/umee-network/umee/v6/x/leverage/types"
)
// iterate through all keys with a given prefix using a provided function.
// If the provided function returns an error, iteration stops and the error
// is returned.
func (k Keeper) iterate(ctx sdk.Context, prefix []byte, cb func(key, val []byte) error) error {
return store.Iterate(ctx.KVStore(k.storeKey), prefix, cb)
}
// getAllBadDebts gets bad debt instances across all borrowers.
func (k Keeper) getAllBadDebts(ctx sdk.Context) []types.BadDebt {
prefix := types.KeyPrefixBadDebt
badDebts := []types.BadDebt{}
iterator := func(key, _ []byte) error {
addr := types.AddressFromKey(key, prefix)
denom := types.DenomFromKeyWithAddress(key, prefix)
badDebts = append(badDebts, types.NewBadDebt(addr.String(), denom))
return nil
}
util.Panic(k.iterate(ctx, prefix, iterator))
return badDebts
}
// GetAllRegisteredTokens returns all the registered tokens from the x/leverage
// module's KVStore.
func (k Keeper) GetAllRegisteredTokens(ctx sdk.Context) []types.Token {
return store.MustLoadAll[*types.Token](ctx.KVStore(k.storeKey), types.KeyPrefixRegisteredToken)
}
// GetAllSpecialAssetPairs returns all the special asset pairs from the x/leverage
// module's KVStore.
func (k Keeper) GetAllSpecialAssetPairs(ctx sdk.Context) []types.SpecialAssetPair {
pairs := store.MustLoadAll[*types.SpecialAssetPair](ctx.KVStore(k.storeKey), types.KeyPrefixSpecialAssetPair)
sort.SliceStable(pairs, func(i, j int) bool {
return pairs[i].CollateralWeight.LT(pairs[j].CollateralWeight)
})
return pairs
}
// GetSpecialAssetPairs returns all the special asset pairs from the x/leverage
// module's KVStore which match a single asset.
func (k Keeper) GetSpecialAssetPairs(ctx sdk.Context, denom string) []types.SpecialAssetPair {
prefix := types.KeySpecialAssetPairOneDenom(denom)
pairs := store.MustLoadAll[*types.SpecialAssetPair](ctx.KVStore(k.storeKey), prefix)
sort.SliceStable(pairs, func(i, j int) bool {
return pairs[i].CollateralWeight.LT(pairs[j].CollateralWeight)
})
return pairs
}
// GetBorrowerBorrows returns an sdk.Coins object containing all open borrows
// associated with an address.
func (k Keeper) GetBorrowerBorrows(ctx sdk.Context, borrowerAddr sdk.AccAddress) sdk.Coins {
prefix := types.KeyAdjustedBorrowNoDenom(borrowerAddr)
totalBorrowed := sdk.NewCoins()
iterator := func(key, val []byte) error {
borrowDenom := types.DenomFromKeyWithAddress(key, types.KeyPrefixAdjustedBorrow)
var adjustedAmount sdk.Dec
if err := adjustedAmount.Unmarshal(val); err != nil {
// improperly marshaled borrow amount should never happen
return err
}
// apply interest scalar
amount := adjustedAmount.Mul(k.getInterestScalar(ctx, borrowDenom)).Ceil().TruncateInt()
totalBorrowed = totalBorrowed.Add(sdk.NewCoin(borrowDenom, amount))
return nil
}
util.Panic(k.iterate(ctx, prefix, iterator))
return totalBorrowed
}
// GetBorrowerCollateral returns an sdk.Coins containing all of a borrower's collateral.
func (k Keeper) GetBorrowerCollateral(ctx sdk.Context, borrowerAddr sdk.AccAddress) sdk.Coins {
prefix := types.KeyCollateralAmountNoDenom(borrowerAddr)
totalCollateral := sdk.NewCoins()
iterator := func(key, val []byte) error {
borrowDenom := types.DenomFromKeyWithAddress(key, types.KeyPrefixCollateralAmount)
var amount sdkmath.Int
if err := amount.Unmarshal(val); err != nil {
// improperly marshaled amount should never happen
return err
}
totalCollateral = totalCollateral.Add(sdk.NewCoin(borrowDenom, amount))
return nil
}
util.Panic(k.iterate(ctx, prefix, iterator))
return totalCollateral
}
// GetEligibleLiquidationTargets returns a list of borrower addresses eligible for liquidation.
func (k Keeper) GetEligibleLiquidationTargets(ctx sdk.Context) ([]sdk.AccAddress, error) {
prefix := types.KeyPrefixAdjustedBorrow
liquidationTargets := []sdk.AccAddress{}
checkedAddrs := map[string]struct{}{}
iterator := func(key, _ []byte) error {
borrowerAddr := types.AddressFromKey(key, prefix)
// if the address is already checked, do not check again
if _, ok := checkedAddrs[borrowerAddr.String()]; ok {
return nil
}
checkedAddrs[borrowerAddr.String()] = struct{}{}
position, err := k.GetAccountPosition(ctx, borrowerAddr, true)
if err == nil {
borrowValue := position.BorrowedValue()
liquidationThreshold := position.Limit()
if liquidationThreshold.LT(borrowValue) {
// If liquidation threshold is smaller than borrowed value then the
// address is eligible for liquidation.
liquidationTargets = append(liquidationTargets, borrowerAddr)
}
}
// Non-price errors will cause the query itself to fail, whereas oracle errors
// simply cause the address to be skipped
if nonOracleError(err) {
return err
}
return nil
}
if err := k.iterate(ctx, prefix, iterator); err != nil {
return nil, err
}
return liquidationTargets, nil
}
// SweepBadDebts attempts to repay all bad debts in the system.
func (k Keeper) SweepBadDebts(ctx sdk.Context) error {
prefix := types.KeyPrefixBadDebt
iterator := func(key, _ []byte) error {
addr := types.AddressFromKey(key, prefix)
denom := types.DenomFromKeyWithAddress(key, prefix)
// clear blacklisted collateral while checking for any remaining (valid) collateral
done, err := k.clearBlacklistedCollateral(ctx, addr)
if err != nil {
return err
}
// if remaining collateral is zero, attempt to repay this bad debt
if !done {
var err error
done, err = k.RepayBadDebt(ctx, addr, denom)
if err != nil {
return err
}
}
// if collateral found or debt fully repaid, clear the bad debt entry for this address|denom
if done {
if err := k.setBadDebtAddress(ctx, addr, denom, false); err != nil {
return err
}
}
return nil
}
return k.iterate(ctx, prefix, iterator)
}
// GetAllUTokenSupply returns total supply of all uToken denoms.
func (k Keeper) GetAllUTokenSupply(ctx sdk.Context) sdk.Coins {
return store.SumCoins(k.prefixStore(ctx, types.KeyPrefixUtokenSupply), keys.NoLastByte)
}
// GetAllReserves returns all reserves.
func (k Keeper) GetAllReserves(ctx sdk.Context) sdk.Coins {
return store.SumCoins(k.prefixStore(ctx, types.KeyPrefixReserveAmount), keys.NoLastByte)
}
func (k Keeper) prefixStore(ctx sdk.Context, p []byte) storetypes.KVStore {
return prefixstore.NewStore(ctx.KVStore(k.storeKey), p)
}