mirror of
https://github.com/0glabs/0g-chain.git
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108 lines
3.5 KiB
Go
108 lines
3.5 KiB
Go
package keeper
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import (
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"fmt"
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"github.com/cosmos/cosmos-sdk/codec"
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"github.com/cosmos/cosmos-sdk/store/prefix"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/x/params/subspace"
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"github.com/kava-labs/kava/x/cdp/types"
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)
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// Keeper keeper for the cdp module
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type Keeper struct {
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key sdk.StoreKey
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cdc *codec.Codec
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paramSubspace subspace.Subspace
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pricefeedKeeper types.PricefeedKeeper
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supplyKeeper types.SupplyKeeper
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auctionKeeper types.AuctionKeeper
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accountKeeper types.AccountKeeper
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maccPerms map[string][]string
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}
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// NewKeeper creates a new keeper
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func NewKeeper(cdc *codec.Codec, key sdk.StoreKey, paramstore subspace.Subspace, pfk types.PricefeedKeeper,
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ak types.AuctionKeeper, sk types.SupplyKeeper, ack types.AccountKeeper, maccs map[string][]string) Keeper {
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if !paramstore.HasKeyTable() {
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paramstore = paramstore.WithKeyTable(types.ParamKeyTable())
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}
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return Keeper{
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key: key,
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cdc: cdc,
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paramSubspace: paramstore,
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pricefeedKeeper: pfk,
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auctionKeeper: ak,
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supplyKeeper: sk,
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accountKeeper: ack,
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maccPerms: maccs,
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}
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}
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// CdpDenomIndexIterator returns an sdk.Iterator for all cdps with matching collateral denom
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func (k Keeper) CdpDenomIndexIterator(ctx sdk.Context, denom string) sdk.Iterator {
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store := prefix.NewStore(ctx.KVStore(k.key), types.CdpKeyPrefix)
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db, _ := k.GetDenomPrefix(ctx, denom)
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return sdk.KVStorePrefixIterator(store, types.DenomIterKey(db))
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}
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// CdpCollateralRatioIndexIterator returns an sdk.Iterator for all cdps that have collateral denom
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// matching denom and collateral:debt ratio LESS THAN targetRatio
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func (k Keeper) CdpCollateralRatioIndexIterator(ctx sdk.Context, denom string, targetRatio sdk.Dec) sdk.Iterator {
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store := prefix.NewStore(ctx.KVStore(k.key), types.CollateralRatioIndexPrefix)
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db, _ := k.GetDenomPrefix(ctx, denom)
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return store.Iterator(types.CollateralRatioIterKey(db, sdk.ZeroDec()), types.CollateralRatioIterKey(db, targetRatio))
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}
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// IterateAllCdps iterates over all cdps and performs a callback function
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func (k Keeper) IterateAllCdps(ctx sdk.Context, cb func(cdp types.CDP) (stop bool)) {
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store := prefix.NewStore(ctx.KVStore(k.key), types.CdpKeyPrefix)
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iterator := sdk.KVStorePrefixIterator(store, []byte{})
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defer iterator.Close()
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for ; iterator.Valid(); iterator.Next() {
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var cdp types.CDP
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k.cdc.MustUnmarshalBinaryLengthPrefixed(iterator.Value(), &cdp)
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if cb(cdp) {
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break
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}
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}
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}
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// IterateCdpsByDenom iterates over cdps with matching denom and performs a callback function
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func (k Keeper) IterateCdpsByDenom(ctx sdk.Context, denom string, cb func(cdp types.CDP) (stop bool)) {
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iterator := k.CdpDenomIndexIterator(ctx, denom)
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defer iterator.Close()
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for ; iterator.Valid(); iterator.Next() {
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var cdp types.CDP
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k.cdc.MustUnmarshalBinaryLengthPrefixed(iterator.Value(), &cdp)
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if cb(cdp) {
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break
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}
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}
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}
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// IterateCdpsByCollateralRatio iterate over cdps with collateral denom equal to denom and
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// collateral:debt ratio LESS THAN targetRatio and performs a callback function.
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func (k Keeper) IterateCdpsByCollateralRatio(ctx sdk.Context, denom string, targetRatio sdk.Dec, cb func(cdp types.CDP) (stop bool)) {
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iterator := k.CdpCollateralRatioIndexIterator(ctx, denom, targetRatio)
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defer iterator.Close()
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for ; iterator.Valid(); iterator.Next() {
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db, id, _ := types.SplitCollateralRatioKey(iterator.Key())
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d := k.getDenomFromByte(ctx, db)
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cdp, found := k.GetCDP(ctx, d, id)
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if !found {
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panic(fmt.Sprintf("cdp %d does not exist", id))
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}
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if cb(cdp) {
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break
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}
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}
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}
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