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beacon/types: enforce fork order based on known forks list (#29380)

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Co-authored-by: Felix Lange <fjl@twurst.com>
This commit is contained in:
Felföldi Zsolt 2024-04-04 16:30:27 +02:00 committed by GitHub
parent 15ff066a24
commit 35fcf9c52b
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
1 changed files with 27 additions and 9 deletions
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26
beacon/types/config.go
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@ -19,7 +19,9 @@ package types
import (
"crypto/sha256"
"fmt"
"math"
"os"
"slices"
"sort"
"strconv"
"strings"
@ -27,6 +29,7 @@ import (
"github.com/ethereum/go-ethereum/beacon/merkle"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/log"
"gopkg.in/yaml.v3"
)
@ -34,6 +37,8 @@ import (
// across signing different data structures.
const syncCommitteeDomain = 7
var knownForks = []string{"GENESIS", "ALTAIR", "BELLATRIX", "CAPELLA", "DENEB"}
// Fork describes a single beacon chain fork and also stores the calculated
// signature domain used after this fork.
type Fork struct {
@ -46,6 +51,9 @@ type Fork struct {
// Fork version, see https://github.com/ethereum/consensus-specs/blob/dev/specs/phase0/beacon-chain.md#custom-types
Version []byte
// index in list of known forks or MaxInt if unknown
knownIndex int
// calculated by computeDomain, based on fork version and genesis validators root
domain merkle.Value
}
@ -101,7 +109,12 @@ func (f Forks) SigningRoot(header Header) (common.Hash, error) {
func (f Forks) Len() int { return len(f) }
func (f Forks) Swap(i, j int) { f[i], f[j] = f[j], f[i] }
func (f Forks) Less(i, j int) bool { return f[i].Epoch < f[j].Epoch }
func (f Forks) Less(i, j int) bool {
if f[i].Epoch != f[j].Epoch {
return f[i].Epoch < f[j].Epoch
}
return f[i].knownIndex < f[j].knownIndex
}
// ChainConfig contains the beacon chain configuration.
type ChainConfig struct {
@ -122,16 +135,22 @@ func (c *ChainConfig) ForkAtEpoch(epoch uint64) Fork {
// AddFork adds a new item to the list of forks.
func (c *ChainConfig) AddFork(name string, epoch uint64, version []byte) *ChainConfig {
knownIndex := slices.Index(knownForks, name)
if knownIndex == -1 {
knownIndex = math.MaxInt // assume that the unknown fork happens after the known ones
if epoch != math.MaxUint64 {
log.Warn("Unknown fork in config.yaml", "fork name", name, "known forks", knownForks)
}
}
fork := &Fork{
Name: name,
Epoch: epoch,
Version: version,
knownIndex: knownIndex,
}
fork.computeDomain(c.GenesisValidatorsRoot)
c.Forks = append(c.Forks, fork)
sort.Sort(c.Forks)
return c
}
@ -181,6 +200,5 @@ func (c *ChainConfig) LoadForks(path string) error {
for name := range versions {
return fmt.Errorf("epoch number missing for fork %q in beacon chain config file", name)
}
sort.Sort(c.Forks)
return nil
}