mirror of
https://github.com/ethereum/go-ethereum.git
synced 2026-08-20 10:52:25 +00:00
63 lines
2.4 KiB
Go
63 lines
2.4 KiB
Go
// Copyright 2023 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library 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 Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package light
|
|
|
|
import (
|
|
"errors"
|
|
|
|
"github.com/ethereum/go-ethereum/beacon/merkle"
|
|
"github.com/ethereum/go-ethereum/beacon/params"
|
|
"github.com/ethereum/go-ethereum/beacon/types"
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/log"
|
|
)
|
|
|
|
// CheckpointData contains a sync committee where light sync can be started,
|
|
// together with a proof through a beacon header and corresponding state.
|
|
// Note: CheckpointData is fetched from a server based on a known checkpoint hash.
|
|
type CheckpointData struct {
|
|
Header types.Header
|
|
CommitteeRoot common.Hash
|
|
Committee *types.SerializedSyncCommittee `rlp:"-"`
|
|
CommitteeBranch merkle.Values
|
|
}
|
|
|
|
// Validate verifies the proof included in CheckpointData.
|
|
func (c *CheckpointData) Validate() error {
|
|
if c.CommitteeRoot != c.Committee.Root() {
|
|
return errors.New("wrong committee root")
|
|
}
|
|
return merkle.VerifyProof(c.Header.StateRoot, params.StateIndexSyncCommittee, c.CommitteeBranch, merkle.Value(c.CommitteeRoot))
|
|
}
|
|
|
|
// InitChain initializes a CommitteeChain based on the checkpoint.
|
|
// Note that the checkpoint is expected to be already validated.
|
|
func (c *CheckpointData) InitChain(chain *CommitteeChain) {
|
|
must := func(err error) {
|
|
if err != nil {
|
|
log.Error("Error initializing committee chain with checkpoint", "error", err)
|
|
}
|
|
}
|
|
period := c.Header.SyncPeriod()
|
|
must(chain.DeleteFixedCommitteeRootsFrom(period + 2))
|
|
if chain.AddFixedCommitteeRoot(period, c.CommitteeRoot) != nil {
|
|
chain.Reset()
|
|
must(chain.AddFixedCommitteeRoot(period, c.CommitteeRoot))
|
|
}
|
|
must(chain.AddFixedCommitteeRoot(period+1, common.Hash(c.CommitteeBranch[0])))
|
|
must(chain.AddCommittee(period, c.Committee))
|
|
}
|