9326a118c7
This PR integrates witness-enabled block production, witness-creating
payload execution and stateless cross-validation into the `engine` API.
The purpose of the PR is to enable the following use-cases (for API
details, please see next section):
- Cross validating locally created blocks:
- Call `forkchoiceUpdatedWithWitness` instead of `forkchoiceUpdated` to
trigger witness creation too.
- Call `getPayload` as before to retrieve the new block and also the
above created witness.
- Call `executeStatelessPayload` against another client to
cross-validate the block.
- Cross validating locally processed blocks:
- Call `newPayloadWithWitness` instead of `newPayload` to trigger
witness creation too.
- Call `executeStatelessPayload` against another client to
cross-validate the block.
- Block production for stateless clients (local or MEV builders):
- Call `forkchoiceUpdatedWithWitness` instead of `forkchoiceUpdated` to
trigger witness creation too.
- Call `getPayload` as before to retrieve the new block and also the
above created witness.
- Propagate witnesses across the consensus libp2p network for stateless
Ethereum.
- Stateless validator validation:
- Call `executeStatelessPayload` with the propagated witness to
statelessly validate the block.
*Note, the various `WithWitness` methods could also *just be* an
additional boolean flag on the base methods, but this PR wanted to keep
the methods separate until a final consensus is reached on how to
integrate in production.*
---
The following `engine` API types are introduced:
```go
// StatelessPayloadStatusV1 is the result of a stateless payload execution.
type StatelessPayloadStatusV1 struct {
Status string `json:"status"`
StateRoot common.Hash `json:"stateRoot"`
ReceiptsRoot common.Hash `json:"receiptsRoot"`
ValidationError *string `json:"validationError"`
}
```
- Add `forkchoiceUpdatedWithWitnessV1,2,3` with same params and returns
as `forkchoiceUpdatedV1,2,3`, but triggering a stateless witness
building if block production is requested.
- Extend `getPayloadV2,3` to return `executionPayloadEnvelope` with an
additional `witness` field of type `bytes` iff created via
`forkchoiceUpdatedWithWitnessV2,3`.
- Add `newPayloadWithWitnessV1,2,3,4` with same params and returns as
`newPayloadV1,2,3,4`, but triggering a stateless witness creation during
payload execution to allow cross validating it.
- Extend `payloadStatusV1` with a `witness` field of type `bytes` if
returned by `newPayloadWithWitnessV1,2,3,4`.
- Add `executeStatelessPayloadV1,2,3,4` with same base params as
`newPayloadV1,2,3,4` and one more additional param (`witness`) of type
`bytes`. The method returns `statelessPayloadStatusV1`, which mirrors
`payloadStatusV1` but replaces `latestValidHash` with `stateRoot` and
`receiptRoot`.
77 lines
2.2 KiB
Go
77 lines
2.2 KiB
Go
// Copyright 2024 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package stateless
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import (
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"io"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/rlp"
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)
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// toExtWitness converts our internal witness representation to the consensus one.
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func (w *Witness) toExtWitness() *extWitness {
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ext := &extWitness{
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Headers: w.Headers,
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}
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ext.Codes = make([][]byte, 0, len(w.Codes))
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for code := range w.Codes {
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ext.Codes = append(ext.Codes, []byte(code))
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}
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ext.State = make([][]byte, 0, len(w.State))
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for node := range w.State {
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ext.State = append(ext.State, []byte(node))
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}
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return ext
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}
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// fromExtWitness converts the consensus witness format into our internal one.
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func (w *Witness) fromExtWitness(ext *extWitness) error {
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w.Headers = ext.Headers
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w.Codes = make(map[string]struct{}, len(ext.Codes))
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for _, code := range ext.Codes {
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w.Codes[string(code)] = struct{}{}
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}
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w.State = make(map[string]struct{}, len(ext.State))
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for _, node := range ext.State {
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w.State[string(node)] = struct{}{}
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}
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return nil
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}
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// EncodeRLP serializes a witness as RLP.
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func (w *Witness) EncodeRLP(wr io.Writer) error {
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return rlp.Encode(wr, w.toExtWitness())
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}
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// DecodeRLP decodes a witness from RLP.
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func (w *Witness) DecodeRLP(s *rlp.Stream) error {
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var ext extWitness
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if err := s.Decode(&ext); err != nil {
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return err
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}
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return w.fromExtWitness(&ext)
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}
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// extWitness is a witness RLP encoding for transferring across clients.
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type extWitness struct {
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Headers []*types.Header
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Codes [][]byte
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State [][]byte
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}
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