Part of [Upgrade Go to v1.21 in ipld-eth-server](https://www.notion.so/Upgrade-Go-to-v1-21-in-ipld-eth-server-b78717fc055a4fc38616e09621b32b9b) - Use `ipfs/boxo` as `ipfs/go-blockservice` has been moved to `ipfs/boxo/blockservice` Co-authored-by: neeraj <neeraj.rtly@gmail.com> Reviewed-on: #2 Co-authored-by: Prathamesh Musale <prathamesh@noreply.git.vdb.to> Co-committed-by: Prathamesh Musale <prathamesh@noreply.git.vdb.to>
97 lines
3.4 KiB
Go
97 lines
3.4 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 ipfsethdb
|
|
|
|
import (
|
|
"context"
|
|
|
|
"github.com/ethereum/go-ethereum/ethdb"
|
|
"github.com/ipfs/boxo/blockservice"
|
|
)
|
|
|
|
var _ ethdb.Iterator = &Iterator{}
|
|
|
|
// Iterator is the type that satisfies the ethdb.Iterator interface for IPFS Ethereum data
|
|
// Iteratee interface is used in Geth for various tests, trie/sync_bloom.go (for fast sync),
|
|
// rawdb.InspectDatabase, and the new core/state/snapshot features.
|
|
// This should not be confused with trie.NodeIterator or state.NodeIteraor (which can be constructed
|
|
// from the ethdb.KeyValueStoreand ethdb.Database interfaces)
|
|
type Iterator struct {
|
|
blockService blockservice.BlockService
|
|
currentKey, prefix []byte
|
|
err error
|
|
}
|
|
|
|
// NewIterator returns an ethdb.Iterator interface for PG-IPFS
|
|
func NewIterator(start, prefix []byte, bs blockservice.BlockService) ethdb.Iterator {
|
|
return &Iterator{
|
|
blockService: bs,
|
|
prefix: prefix,
|
|
currentKey: start,
|
|
}
|
|
}
|
|
|
|
// Next satisfies the ethdb.Iterator interface
|
|
// Next moves the iterator to the next key/value pair
|
|
// It returns whether the iterator is exhausted
|
|
func (i *Iterator) Next() bool {
|
|
// this is complicated by the ipfs db keys not being the keccak256 hashes
|
|
// go-ethereum usage of this method expects the iteration to occur over keccak256 keys
|
|
panic("implement me: Next")
|
|
}
|
|
|
|
// Error satisfies the ethdb.Iterator interface
|
|
// Error returns any accumulated error
|
|
// Exhausting all the key/value pairs is not considered to be an error
|
|
func (i *Iterator) Error() error {
|
|
return i.err
|
|
}
|
|
|
|
// Key satisfies the ethdb.Iterator interface
|
|
// Key returns the key of the current key/value pair, or nil if done
|
|
// The caller should not modify the contents of the returned slice
|
|
// and its contents may change on the next call to Next
|
|
func (i *Iterator) Key() []byte {
|
|
return i.currentKey
|
|
}
|
|
|
|
// Value satisfies the ethdb.Iterator interface
|
|
// Value returns the value of the current key/value pair, or nil if done
|
|
// The caller should not modify the contents of the returned slice
|
|
// and its contents may change on the next call to Next
|
|
func (i *Iterator) Value() []byte {
|
|
// we are using state codec because we don't know the codec and at this level the codec doesn't matter, the datastore key is multihash-only derived
|
|
c, err := Keccak256ToCid(i.currentKey, stateTrieCodec)
|
|
if err != nil {
|
|
i.err = err
|
|
return nil
|
|
}
|
|
block, err := i.blockService.GetBlock(context.Background(), c)
|
|
if err != nil {
|
|
i.err = err
|
|
return nil
|
|
}
|
|
return block.RawData()
|
|
}
|
|
|
|
// Release satisfies the ethdb.Iterator interface
|
|
// Release releases associated resources
|
|
// Release should always succeed and can be called multiple times without causing error
|
|
func (i *Iterator) Release() {
|
|
i.blockService.Close()
|
|
}
|