plugeth-statediff/indexer/ipld/shared.go

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2023-06-14 12:43:34 +00:00
// 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
)
// 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)
}