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beacon/types: enforce fork order based on known forks list

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This commit is contained in:
Zsolt Felfoldi 2024-03-28 08:51:09 +01:00
parent 767b00b0b5
commit 80bf2c0143
1 changed files with 29 additions and 8 deletions
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37
beacon/types/config.go
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@ -19,6 +19,7 @@ package types
import (
"crypto/sha256"
"fmt"
"math"
"os"
"sort"
"strconv"
@ -27,6 +28,7 @@ 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 +36,8 @@ 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 +50,9 @@ 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
}
@ -99,9 +106,14 @@ func (f Forks) SigningRoot(header Header) (common.Hash, error) {
return signingRoot, nil
}
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) 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 {
if f[i].knownIndex != f[j].knownIndex {
return f[i].knownIndex < f[j].knownIndex
}
return f[i].Epoch < f[j].Epoch
}
// ChainConfig contains the beacon chain configuration.
type ChainConfig struct {
@ -122,16 +134,26 @@ 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 := math.MaxInt
for i, fname := range knownForks {
if name == fname {
knownIndex = i
break
}
}
if knownIndex == math.MaxInt && epoch != math.MaxUint64 {
log.Warn("Unknown fork in config.yaml", "fork name", name, "known forks", knownForks)
}
fork := &Fork{
Name: name,
Epoch: epoch,
Version: version,
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 +203,5 @@ 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
}