0g-chain/x/issuance/keeper/keeper.go

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package keeper
import (
"time"
"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/issuance/types"
)
// Keeper keeper for the issuance module
type Keeper struct {
key sdk.StoreKey
cdc *codec.Codec
paramSubspace subspace.Subspace
accountKeeper types.AccountKeeper
supplyKeeper types.SupplyKeeper
}
// NewKeeper returns a new keeper
func NewKeeper(cdc *codec.Codec, key sdk.StoreKey, paramstore subspace.Subspace, ak types.AccountKeeper, sk types.SupplyKeeper) Keeper {
if !paramstore.HasKeyTable() {
paramstore = paramstore.WithKeyTable(types.ParamKeyTable())
}
return Keeper{
key: key,
cdc: cdc,
paramSubspace: paramstore,
accountKeeper: ak,
supplyKeeper: sk,
}
}
// GetAssetSupply gets an asset's current supply from the store.
func (k Keeper) GetAssetSupply(ctx sdk.Context, denom string) (types.AssetSupply, bool) {
var assetSupply types.AssetSupply
store := prefix.NewStore(ctx.KVStore(k.key), types.AssetSupplyPrefix)
bz := store.Get([]byte(denom))
if bz == nil {
return types.AssetSupply{}, false
}
k.cdc.MustUnmarshalBinaryBare(bz, &assetSupply)
return assetSupply, true
}
// SetAssetSupply updates an asset's supply
func (k Keeper) SetAssetSupply(ctx sdk.Context, supply types.AssetSupply, denom string) {
store := prefix.NewStore(ctx.KVStore(k.key), types.AssetSupplyPrefix)
store.Set([]byte(denom), k.cdc.MustMarshalBinaryBare(supply))
}
// IterateAssetSupplies provides an iterator over all stored AssetSupplies.
func (k Keeper) IterateAssetSupplies(ctx sdk.Context, cb func(supply types.AssetSupply) (stop bool)) {
iterator := sdk.KVStorePrefixIterator(ctx.KVStore(k.key), types.AssetSupplyPrefix)
defer iterator.Close()
for ; iterator.Valid(); iterator.Next() {
var supply types.AssetSupply
k.cdc.MustUnmarshalBinaryBare(iterator.Value(), &supply)
if cb(supply) {
break
}
}
}
// GetAllAssetSupplies returns all asset supplies from the store
func (k Keeper) GetAllAssetSupplies(ctx sdk.Context) (supplies types.AssetSupplies) {
k.IterateAssetSupplies(ctx, func(supply types.AssetSupply) bool {
supplies = append(supplies, supply)
return false
})
return
}
// GetPreviousBlockTime get the blocktime for the previous block
func (k Keeper) GetPreviousBlockTime(ctx sdk.Context) (blockTime time.Time, found bool) {
store := prefix.NewStore(ctx.KVStore(k.key), types.PreviousBlockTimeKey)
b := store.Get([]byte{})
if b == nil {
return time.Time{}, false
}
k.cdc.MustUnmarshalBinaryLengthPrefixed(b, &blockTime)
return blockTime, true
}
// SetPreviousBlockTime set the time of the previous block
func (k Keeper) SetPreviousBlockTime(ctx sdk.Context, blockTime time.Time) {
store := prefix.NewStore(ctx.KVStore(k.key), types.PreviousBlockTimeKey)
store.Set([]byte{}, k.cdc.MustMarshalBinaryLengthPrefixed(blockTime))
}