65 lines
1.8 KiB
Go
65 lines
1.8 KiB
Go
|
// VulcanizeDB
|
||
|
|
// Copyright © 2020 Vulcanize
|
||
|
|
|
||
|
|
// This program is free software: you can redistribute it and/or modify
|
||
|
|
// it under the terms of the GNU Affero General Public License as published by
|
||
|
|
// the Free Software Foundation, either version 3 of the License, or
|
||
|
|
// (at your option) any later version.
|
||
|
|
|
||
|
|
// This program is distributed in the hope that it will be useful,
|
||
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
// GNU Affero General Public License for more details.
|
||
|
|
|
||
|
|
// You should have received a copy of the GNU Affero General Public License
|
||
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
|
||
|
|
package pgipfsethdb
|
||
|
|
|
||
|
|
import "bytes"
|
||
|
|
|
||
|
|
type KeyType uint
|
||
|
|
|
||
|
|
const (
|
||
|
|
Invalid KeyType = iota
|
||
|
|
Keccak
|
||
|
|
Prefixed
|
||
|
|
Suffixed
|
||
|
|
Header
|
||
|
|
Preimage
|
||
|
|
)
|
||
|
|
|
||
|
|
var (
|
||
|
|
// keyDelineation is used to delineate the key prefixes and suffixes
|
||
|
|
KeyDelineation = []byte("/")
|
||
|
|
|
||
|
|
// numberDelineation is used to delineate the block number encoded in a key
|
||
|
|
NumberDelineation = []byte(":")
|
||
|
|
|
||
|
|
// Data item prefixes (use single byte to avoid mixing data types, avoid `i`, used for indexes).
|
||
|
|
HeaderPrefix = []byte("h") // headerPrefix + num (uint64 big endian) + hash -> header
|
||
|
|
PreimagePrefix = []byte("secure-key-") // preimagePrefix + hash -> preimage
|
||
|
|
)
|
||
|
|
|
||
|
|
// ResolveKeyType returns the key type based on the prefix
|
||
|
|
func ResolveKeyType(key []byte) (KeyType, [][]byte) {
|
||
|
|
sk := bytes.Split(key, KeyDelineation)
|
||
|
|
|
||
|
|
switch len(sk) {
|
||
|
|
case 1:
|
||
|
|
return Keccak, sk
|
||
|
|
case 2:
|
||
|
|
switch prefix := sk[0]; {
|
||
|
|
case bytes.Equal(prefix, HeaderPrefix):
|
||
|
|
return Header, bytes.Split(sk[1], NumberDelineation)
|
||
|
|
case bytes.Equal(prefix, PreimagePrefix):
|
||
|
|
return Preimage, sk
|
||
|
|
default:
|
||
|
|
return Prefixed, sk
|
||
|
|
}
|
||
|
|
case 3:
|
||
|
|
return Suffixed, sk
|
||
|
|
}
|
||
|
|
return Invalid, sk
|
||
|
|
}
|