neoneo-go/pkg/core/asset_state.go
2019-12-06 12:16:55 +03:00

103 lines
2.3 KiB
Go

package core
import (
"github.com/CityOfZion/neo-go/pkg/core/storage"
"github.com/CityOfZion/neo-go/pkg/core/transaction"
"github.com/CityOfZion/neo-go/pkg/crypto/keys"
"github.com/CityOfZion/neo-go/pkg/io"
"github.com/CityOfZion/neo-go/pkg/util"
)
const feeMode = 0x0
// Assets is mapping between AssetID and the AssetState.
type Assets map[util.Uint256]*AssetState
func (a Assets) commit(store storage.Store) error {
for _, state := range a {
if err := putAssetStateIntoStore(store, state); err != nil {
return err
}
}
return nil
}
// putAssetStateIntoStore puts given asset state into the given store.
func putAssetStateIntoStore(s storage.Store, as *AssetState) error {
buf := io.NewBufBinWriter()
as.EncodeBinary(buf.BinWriter)
if buf.Err != nil {
return buf.Err
}
key := storage.AppendPrefix(storage.STAsset, as.ID.BytesBE())
return s.Put(key, buf.Bytes())
}
// AssetState represents the state of an NEO registered Asset.
type AssetState struct {
ID util.Uint256
AssetType transaction.AssetType
Name string
Amount util.Fixed8
Available util.Fixed8
Precision uint8
FeeMode uint8
FeeAddress util.Uint160
Owner *keys.PublicKey
Admin util.Uint160
Issuer util.Uint160
Expiration uint32
IsFrozen bool
}
// DecodeBinary implements Serializable interface.
func (a *AssetState) DecodeBinary(br *io.BinReader) {
br.ReadLE(&a.ID)
br.ReadLE(&a.AssetType)
a.Name = br.ReadString()
br.ReadLE(&a.Amount)
br.ReadLE(&a.Available)
br.ReadLE(&a.Precision)
br.ReadLE(&a.FeeMode)
br.ReadLE(&a.FeeAddress)
a.Owner = &keys.PublicKey{}
a.Owner.DecodeBinary(br)
br.ReadLE(&a.Admin)
br.ReadLE(&a.Issuer)
br.ReadLE(&a.Expiration)
br.ReadLE(&a.IsFrozen)
}
// EncodeBinary implements Serializable interface.
func (a *AssetState) EncodeBinary(bw *io.BinWriter) {
bw.WriteLE(a.ID)
bw.WriteLE(a.AssetType)
bw.WriteString(a.Name)
bw.WriteLE(a.Amount)
bw.WriteLE(a.Available)
bw.WriteLE(a.Precision)
bw.WriteLE(a.FeeMode)
bw.WriteLE(a.FeeAddress)
a.Owner.EncodeBinary(bw)
bw.WriteLE(a.Admin)
bw.WriteLE(a.Issuer)
bw.WriteLE(a.Expiration)
bw.WriteLE(a.IsFrozen)
}
// GetName returns the asset name based on its type.
func (a *AssetState) GetName() string {
if a.AssetType == transaction.GoverningToken {
return "NEO"
} else if a.AssetType == transaction.UtilityToken {
return "NEOGas"
}
return a.Name
}