ipld-eth-server/pkg/ipfs/helpers.go
2019-12-02 13:24:58 -06:00

65 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 ipfs
import (
"context"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ipfs/go-blockservice"
"github.com/ipfs/go-ipfs/core"
"github.com/ipfs/go-ipfs/repo/fsrepo"
)
// InitIPFSBlockService is used to configure and return a BlockService using an ipfs repo path (e.g. ~/.ipfs)
func InitIPFSBlockService(ipfsPath string) (blockservice.BlockService, error) {
r, err := fsrepo.Open(ipfsPath)
if err != nil {
return nil, err
}
ctx := context.Background()
cfg := &core.BuildCfg{
Online: false,
Repo: r,
}
ipfsNode, err := core.NewNode(ctx, cfg)
if err != nil {
return nil, err
}
return ipfsNode.Blocks, nil
}
// AddressToKey hashes an address
func AddressToKey(address common.Address) common.Hash {
return crypto.Keccak256Hash(address[:])
}
// HexToKey hashes a hex (0x leading or not) string
func HexToKey(hex string) common.Hash {
addr := common.FromHex(hex)
return crypto.Keccak256Hash(addr[:])
}
// EmptyCIDWrapper returns whether or not the provided CIDWrapper has any Cids we need to process
func EmptyCIDWrapper(cids CIDWrapper) bool {
if len(cids.Transactions) > 0 || len(cids.Headers) > 0 || len(cids.Uncles) > 0 || len(cids.Receipts) > 0 || len(cids.StateNodes) > 0 || len(cids.StorageNodes) > 0 {
return false
}
return true
}