path: root/core/rawdb/accessors_core_chain_tip.go

package rawdb

import (
    "bytes"

    coreCommon "github.com/dexon-foundation/dexon-consensus/common"
    "github.com/dexon-foundation/dexon/log"
    "github.com/dexon-foundation/dexon/rlp"
)

func ReadCoreCompactionChainTipRLP(db DatabaseReader) (rlp.RawValue, error) {
    return db.Get(coreCompactionChainTipKey)
}

func WriteCoreCompactionChainTipRLP(db DatabaseWriter, rlp rlp.RawValue) error {
    if err := db.Put(coreCompactionChainTipKey, rlp); err != nil {
        log.Crit("Failed to store core compaction chain tip")
        return err
    }
    return nil
}

func ReadCoreCompactionChainTip(db DatabaseReader) (coreCommon.Hash, uint64) {
    data, err := ReadCoreCompactionChainTipRLP(db)
    if err != nil {
        return coreCommon.Hash{}, 0
    }
    v := struct {
        Height uint64
        Hash   coreCommon.Hash
    }{}
    if err := rlp.Decode(bytes.NewReader(data), &v); err != nil {
        log.Error("Invalid core compaction chain tip RLP", "err", err)
        return coreCommon.Hash{}, 0
    }
    return v.Hash, v.Height
}

func WriteCoreCompactionChainTip(db DatabaseWriter, hash coreCommon.Hash, height uint64) error {
    data, err := rlp.EncodeToBytes(&struct {
        Height uint64
        Hash   coreCommon.Hash
    }{height, hash})
    if err != nil {
        log.Crit("Failed to RLP encode core compaction chain tip", "err", err)
        return err
    }
    return WriteCoreCompactionChainTipRLP(db, data)
}