forked from cerc-io/ipfs-ethdb
58 lines
2.0 KiB
Go
58 lines
2.0 KiB
Go
// VulcanizeDB
|
|
// Copyright © 2019 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 (
|
|
"fmt"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ipfs/go-ipfs-blockstore"
|
|
"github.com/ipfs/go-ipfs-ds-help"
|
|
_ "github.com/lib/pq" //postgres driver
|
|
"github.com/multiformats/go-multihash"
|
|
)
|
|
|
|
// MultihashKeyFromKeccak256 converts keccak256 hash bytes into a blockstore-prefixed multihash db key string
|
|
func MultihashKeyFromKeccak256(h []byte) (string, error) {
|
|
mh, err := multihash.Encode(h, multihash.KECCAK_256)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
dbKey := dshelp.MultihashToDsKey(mh)
|
|
return blockstore.BlockPrefix.String() + dbKey.String(), nil
|
|
}
|
|
|
|
// DatastoreKeyFromGethKey returns the public.blocks key from the provided geth key
|
|
func DatastoreKeyFromGethKey(h []byte) (string, error) {
|
|
keyType, keyComponents := ResolveKeyType(h)
|
|
switch keyType {
|
|
case Keccak:
|
|
return MultihashKeyFromKeccak256(h)
|
|
case Header:
|
|
return MultihashKeyFromKeccak256(keyComponents[1])
|
|
case Preimage:
|
|
return MultihashKeyFromKeccak256(keyComponents[1])
|
|
case Prefixed, Suffixed:
|
|
// This data is not mapped by hash => content by geth, store it using the prefixed/suffixed key directly
|
|
// I.e. the public.blocks datastore key == the hex representation of the geth key
|
|
// Alternatively, decompose the data and derive the hash
|
|
return common.Bytes2Hex(h), nil
|
|
default:
|
|
return "", fmt.Errorf("invalid formatting of database key: %x", h)
|
|
}
|
|
}
|