0g-chain/x/cdp/keeper/keeper.go
Denali Marsh 67b89c2b9c
[R4R] Blacklist module accounts (#517)
* implement module account blacklist

* update cdp getModuleAccountCoins method
2020-05-21 00:50:12 -04:00

108 lines
3.5 KiB
Go

package keeper
import (
"fmt"
"github.com/cosmos/cosmos-sdk/codec"
"github.com/cosmos/cosmos-sdk/store/prefix"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/x/params/subspace"
"github.com/kava-labs/kava/x/cdp/types"
)
// Keeper keeper for the cdp module
type Keeper struct {
key sdk.StoreKey
cdc *codec.Codec
paramSubspace subspace.Subspace
pricefeedKeeper types.PricefeedKeeper
supplyKeeper types.SupplyKeeper
auctionKeeper types.AuctionKeeper
accountKeeper types.AccountKeeper
maccPerms map[string][]string
}
// NewKeeper creates a new keeper
func NewKeeper(cdc *codec.Codec, key sdk.StoreKey, paramstore subspace.Subspace, pfk types.PricefeedKeeper,
ak types.AuctionKeeper, sk types.SupplyKeeper, ack types.AccountKeeper, maccs map[string][]string) Keeper {
if !paramstore.HasKeyTable() {
paramstore = paramstore.WithKeyTable(types.ParamKeyTable())
}
return Keeper{
key: key,
cdc: cdc,
paramSubspace: paramstore,
pricefeedKeeper: pfk,
auctionKeeper: ak,
supplyKeeper: sk,
accountKeeper: ack,
maccPerms: maccs,
}
}
// CdpDenomIndexIterator returns an sdk.Iterator for all cdps with matching collateral denom
func (k Keeper) CdpDenomIndexIterator(ctx sdk.Context, denom string) sdk.Iterator {
store := prefix.NewStore(ctx.KVStore(k.key), types.CdpKeyPrefix)
db, _ := k.GetDenomPrefix(ctx, denom)
return sdk.KVStorePrefixIterator(store, types.DenomIterKey(db))
}
// CdpCollateralRatioIndexIterator returns an sdk.Iterator for all cdps that have collateral denom
// matching denom and collateral:debt ratio LESS THAN targetRatio
func (k Keeper) CdpCollateralRatioIndexIterator(ctx sdk.Context, denom string, targetRatio sdk.Dec) sdk.Iterator {
store := prefix.NewStore(ctx.KVStore(k.key), types.CollateralRatioIndexPrefix)
db, _ := k.GetDenomPrefix(ctx, denom)
return store.Iterator(types.CollateralRatioIterKey(db, sdk.ZeroDec()), types.CollateralRatioIterKey(db, targetRatio))
}
// IterateAllCdps iterates over all cdps and performs a callback function
func (k Keeper) IterateAllCdps(ctx sdk.Context, cb func(cdp types.CDP) (stop bool)) {
store := prefix.NewStore(ctx.KVStore(k.key), types.CdpKeyPrefix)
iterator := sdk.KVStorePrefixIterator(store, []byte{})
defer iterator.Close()
for ; iterator.Valid(); iterator.Next() {
var cdp types.CDP
k.cdc.MustUnmarshalBinaryLengthPrefixed(iterator.Value(), &cdp)
if cb(cdp) {
break
}
}
}
// IterateCdpsByDenom iterates over cdps with matching denom and performs a callback function
func (k Keeper) IterateCdpsByDenom(ctx sdk.Context, denom string, cb func(cdp types.CDP) (stop bool)) {
iterator := k.CdpDenomIndexIterator(ctx, denom)
defer iterator.Close()
for ; iterator.Valid(); iterator.Next() {
var cdp types.CDP
k.cdc.MustUnmarshalBinaryLengthPrefixed(iterator.Value(), &cdp)
if cb(cdp) {
break
}
}
}
// IterateCdpsByCollateralRatio iterate over cdps with collateral denom equal to denom and
// collateral:debt ratio LESS THAN targetRatio and performs a callback function.
func (k Keeper) IterateCdpsByCollateralRatio(ctx sdk.Context, denom string, targetRatio sdk.Dec, cb func(cdp types.CDP) (stop bool)) {
iterator := k.CdpCollateralRatioIndexIterator(ctx, denom, targetRatio)
defer iterator.Close()
for ; iterator.Valid(); iterator.Next() {
db, id, _ := types.SplitCollateralRatioKey(iterator.Key())
d := k.getDenomFromByte(ctx, db)
cdp, found := k.GetCDP(ctx, d, id)
if !found {
panic(fmt.Sprintf("cdp %d does not exist", id))
}
if cb(cdp) {
break
}
}
}