68 lines
1.9 KiB
Go
68 lines
1.9 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 ipld
|
|
|
|
import (
|
|
"github.com/ipfs/go-cid"
|
|
mh "github.com/multiformats/go-multihash"
|
|
)
|
|
|
|
// IPLD Codecs for Ethereum
|
|
// See the authoritative document:
|
|
// https://github.com/multiformats/multicodec/blob/master/table.csv
|
|
const (
|
|
RawBinary = 0x55
|
|
MEthHeader = 0x90
|
|
MEthHeaderList = 0x91
|
|
MEthTxTrie = 0x92
|
|
MEthTx = 0x93
|
|
MEthTxReceiptTrie = 0x94
|
|
MEthTxReceipt = 0x95
|
|
MEthStateTrie = 0x96
|
|
MEthAccountSnapshot = 0x97
|
|
MEthStorageTrie = 0x98
|
|
MEthLogTrie = 0x99
|
|
MEthLog = 0x9a
|
|
MEthWithdrawal = 0x9b // TODO
|
|
)
|
|
|
|
// RawdataToCid takes the desired codec and a slice of bytes
|
|
// and returns the proper cid of the object.
|
|
func RawdataToCid(codec uint64, rawdata []byte, multiHash uint64) (cid.Cid, error) {
|
|
c, err := cid.Prefix{
|
|
Codec: codec,
|
|
Version: 1,
|
|
MhType: multiHash,
|
|
MhLength: -1,
|
|
}.Sum(rawdata)
|
|
if err != nil {
|
|
return cid.Cid{}, err
|
|
}
|
|
return c, nil
|
|
}
|
|
|
|
// Keccak256ToCid takes a keccak256 hash and returns its cid based on
|
|
// the codec given.
|
|
func Keccak256ToCid(codec uint64, h []byte) cid.Cid {
|
|
buf, err := mh.Encode(h, mh.KECCAK_256)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
return cid.NewCidV1(codec, buf)
|
|
}
|