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appdb.go
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appdb.go
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package appdb
import (
"encoding/binary"
"errors"
"github.com/MinterTeam/minter-go-node/cmd/utils"
"github.com/MinterTeam/minter-go-node/config"
"github.com/tendermint/go-amino"
"github.com/tendermint/tendermint/abci/types"
"github.com/tendermint/tendermint/libs/db"
)
var (
cdc = amino.NewCodec()
)
const (
hashPath = "hash"
heightPath = "height"
startHeightPath = "startHeight"
blockTimeDeltaPath = "blockDelta"
validatorsPath = "validators"
dbName = "app"
)
type AppDB struct {
db db.DB
}
func (appDB *AppDB) Close() {
appDB.db.Close()
}
func (appDB *AppDB) GetLastBlockHash() []byte {
var hash [32]byte
rawHash := appDB.db.Get([]byte(hashPath))
copy(hash[:], rawHash)
return hash[:]
}
func (appDB *AppDB) SetLastBlockHash(hash []byte) {
appDB.db.Set([]byte(hashPath), hash)
}
func (appDB *AppDB) GetLastHeight() uint64 {
result := appDB.db.Get([]byte(heightPath))
var height uint64
if result != nil {
height = binary.BigEndian.Uint64(result)
}
return height
}
func (appDB *AppDB) SetLastHeight(height uint64) {
h := make([]byte, 8)
binary.BigEndian.PutUint64(h, height)
appDB.db.Set([]byte(heightPath), h)
}
func (appDB *AppDB) SetStartHeight(height uint64) {
h := make([]byte, 8)
binary.BigEndian.PutUint64(h, height)
appDB.db.Set([]byte(startHeightPath), h)
}
func (appDB *AppDB) GetStartHeight() uint64 {
result := appDB.db.Get([]byte(startHeightPath))
var height uint64
if result != nil {
height = binary.BigEndian.Uint64(result)
}
return height
}
func (appDB *AppDB) GetValidators() types.ValidatorUpdates {
result := appDB.db.Get([]byte(validatorsPath))
if len(result) == 0 {
return types.ValidatorUpdates{}
}
var vals types.ValidatorUpdates
err := cdc.UnmarshalBinaryBare(result, &vals)
if err != nil {
panic(err)
}
return vals
}
func (appDB *AppDB) SaveValidators(vals types.ValidatorUpdates) {
data, err := cdc.MarshalBinaryBare(vals)
if err != nil {
panic(err)
}
appDB.db.Set([]byte(validatorsPath), data)
}
type LastBlocksTimeDelta struct {
Height uint64
Delta int
}
func (appDB *AppDB) GetLastBlocksTimeDelta(height uint64) (int, error) {
result := appDB.db.Get([]byte(blockTimeDeltaPath))
if result == nil {
return 0, errors.New("no info about LastBlocksTimeDelta is available")
}
data := LastBlocksTimeDelta{}
err := cdc.UnmarshalBinaryBare(result, &data)
if err != nil {
panic(err)
}
if data.Height != height {
return 0, errors.New("no info about LastBlocksTimeDelta is available")
}
return data.Delta, nil
}
func (appDB *AppDB) SetLastBlocksTimeDelta(height uint64, delta int) {
data, err := cdc.MarshalBinaryBare(LastBlocksTimeDelta{
Height: height,
Delta: delta,
})
if err != nil {
panic(err)
}
appDB.db.Set([]byte(blockTimeDeltaPath), data)
}
func NewAppDB(cfg *config.Config) *AppDB {
return &AppDB{
db: db.NewDB(dbName, db.DBBackendType(cfg.DBBackend), utils.GetMinterHome()+"/data"),
}
}