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accessors_dag.go
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/
accessors_dag.go
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package rawdb
import (
"bytes"
"encoding/binary"
"github.com/Qitmeer/qng/common/hash"
"github.com/Qitmeer/qng/meerdag"
"github.com/ethereum/go-ethereum/ethdb"
)
func ReadDAGBlockBaw(db ethdb.Reader, id uint64) []byte {
var data []byte
data, _ = db.Get(dagBlockKey(id))
if len(data) > 0 {
return data
}
db.ReadAncients(func(reader ethdb.AncientReaderOp) error {
data, _ = reader.Ancient(ChainFreezerDAGBlockTable, id)
return nil
})
return data
}
func ReadDAGBlock(db ethdb.Reader, id uint64) meerdag.IBlock {
data := ReadDAGBlockBaw(db, id)
if len(data) == 0 {
return nil
}
var block meerdag.IBlock
err := block.Decode(bytes.NewReader(data))
if err != nil {
log.Error(err.Error())
return nil
}
return block
}
func WriteDAGBlock(db ethdb.KeyValueWriter, block meerdag.IBlock) error {
err := db.Put(dagBlockKey(uint64(block.GetID())), block.Bytes())
if err != nil {
log.Error(err.Error())
return err
}
return nil
}
func DeleteDAGBlock(db ethdb.KeyValueWriter, id uint64) {
err := db.Delete(dagBlockKey(id))
if err != nil {
log.Error(err.Error())
}
}
func ReadBlockID(db ethdb.Reader, hash *hash.Hash) *uint64 {
data, err := db.Get(blockIDKey(hash))
if err != nil {
log.Error(err.Error())
return nil
}
number := binary.BigEndian.Uint64(data)
return &number
}
func WriteBlockID(db ethdb.KeyValueWriter, hash *hash.Hash, id uint64) {
if err := db.Put(blockIDKey(hash), hash.Bytes()); err != nil {
log.Error("Failed to store block id to hash mapping", "err", err)
}
}
func DeleteBlockID(db ethdb.KeyValueWriter, hash *hash.Hash) {
if err := db.Delete(blockIDKey(hash)); err != nil {
log.Error("Failed to delete block id to hash mapping", "err", err)
}
}
// ----
func ReadMainChainTip(db ethdb.Reader) *uint64 {
data, err := db.Get(mainchainTipKey)
if err != nil {
log.Error(err.Error())
return nil
}
number := binary.BigEndian.Uint64(data)
return &number
}
func WriteMainChainTip(db ethdb.KeyValueWriter, mainchaintip uint64) error {
err := db.Put(mainchainTipKey, encodeBlockID(mainchaintip))
if err != nil {
log.Error(err.Error())
return err
}
return nil
}
func DeleteMainChainTip(db ethdb.KeyValueWriter) error {
err := db.Delete(mainchainTipKey)
if err != nil {
log.Error(err.Error())
return err
}
return nil
}