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keys.go
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/
keys.go
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package types
import "encoding/binary"
func KeyPrefix(p string) []byte {
return []byte(p)
}
// FixationStore
const (
EntryIndexPrefix = "Entry_Index_"
EntryPrefix = "Entry_Value_"
)
var (
// use single byte to save storage.
// (value cannot be part of a valid index)
EntryIndexLive = []byte{1}
EntryIndexDead = []byte{2}
)
// Common encoder/decode
func EncodeBlockAndKey(block uint64, key []byte) []byte {
encodedKey := make([]byte, 8+len(key))
binary.BigEndian.PutUint64(encodedKey[0:8], block)
copy(encodedKey[8:], key)
return encodedKey
}
func DecodeBlockAndKey(encodedKey []byte) (uint64, []byte) {
block := binary.BigEndian.Uint64(encodedKey[0:8])
return block, encodedKey[8:]
}
func EncodeKey(key uint64) []byte {
return EncodeBlockAndKey(key, []byte{})
}
func DecodeKey(encodedKey []byte) uint64 {
block, _ := DecodeBlockAndKey(encodedKey)
return block
}