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statedata.go
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/
statedata.go
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package statedb
import (
"github.com/aergoio/aergo-lib/db"
"github.com/aergoio/aergo/v2/internal/enc/gob"
"github.com/aergoio/aergo/v2/internal/enc/proto"
"github.com/aergoio/aergo/v2/types"
)
func saveData(store db.DB, key []byte, data interface{}) error {
if key == nil {
return errSaveData
}
var err error
var raw []byte
switch msg := data.(type) {
case ([]byte):
raw = msg
case proto.Message:
raw, err = proto.Encode(msg)
if err != nil {
return err
}
default:
raw, err = gob.Encode(msg)
if err != nil {
return err
}
}
store.Set(key, raw)
return nil
}
func loadData(store db.DB, key []byte, data interface{}) error {
if key == nil {
return errLoadData
}
raw := store.Get(key)
if len(raw) == 0 {
return nil
}
var err error
switch msg := data.(type) {
case *[]byte:
*msg = raw
case proto.Message:
err = proto.Decode(raw, msg)
default:
err = gob.Decode(raw, msg)
}
return err
}
func (states *StateDB) loadStateData(key []byte) (*types.State, error) {
if len(key) == 0 {
return nil, errLoadStateData
}
data := &types.State{}
if err := loadData(states.Store, key, data); err != nil {
return nil, err
}
return data, nil
}