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badger_validation.go
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/
badger_validation.go
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package storage
import (
"bytes"
"encoding/binary"
"encoding/hex"
"fmt"
"sort"
"github.com/MixinNetwork/mixin/common"
"github.com/MixinNetwork/mixin/config"
"github.com/MixinNetwork/mixin/crypto"
"github.com/MixinNetwork/mixin/logger"
)
func (s *BadgerStore) ValidateGraphEntries(networkId crypto.Hash) (int, int, error) {
return s.validateSnapshotEntries(networkId)
}
func (s *BadgerStore) validateSnapshotEntries(networkId crypto.Hash) (int, int, error) {
nodes := s.ReadAllNodes()
stats := make(chan [2]int, len(nodes))
errchan := make(chan error, len(nodes))
for _, n := range nodes {
go func(nodeId crypto.Hash) {
total, invalid, err := s.validateSnapshotEntriesForNode(nodeId)
if err != nil {
logger.Printf("SNAPSHOT VALIDATION ERROR FOR NODE %s %s\n", nodeId, err.Error())
errchan <- err
}
stats <- [2]int{total, invalid}
}(n.Signer.Hash().ForNetwork(networkId))
}
var total, invalid int
for i := 0; i < len(nodes); i++ {
select {
case stat := <-stats:
total += stat[0]
invalid += stat[1]
case err := <-errchan:
return total, invalid, err
}
}
return total, invalid, nil
}
func (s *BadgerStore) validateSnapshotEntriesForNode(nodeId crypto.Hash) (int, int, error) {
logger.Printf("SNAPSHOT VALIDATE NODE %s BEGIN\n", nodeId)
txn := s.snapshotsDB.NewTransaction(false)
defer func() {
txn.Discard()
logger.Printf("SNAPSHOT VALIDATE NODE %s DONE\n", nodeId)
}()
head, err := readRound(txn, nodeId)
if err != nil {
return 0, 0, err
}
if head == nil {
logger.Printf("SNAPSHOT VALIDATE NODE %s 0 ROUND\n", nodeId)
return 0, 0, nil
}
logger.Printf("SNAPSHOT VALIDATE NODE %s %d ROUNDS\n", nodeId, head.Number)
start := head.Number - 10
if head.Number < 10 {
start = 0
}
invalid, total := 0, 0
for i := start; i < head.Number; i++ {
snapshots, err := readSnapshotsForNodeRound(txn, nodeId, i)
if err != nil {
return total, invalid, err
}
for _, s := range snapshots {
total += 1
item, err := txn.Get(graphTransactionKey(s.Transaction))
if err != nil {
return total, invalid, err
}
val, err := item.ValueCopy(nil)
if err != nil {
return total, invalid, err
}
ver, err := common.DecompressUnmarshalVersionedTransaction(val)
if err != nil {
return total, invalid, err
}
if s.Transaction.String() != ver.PayloadHash().String() {
logger.Printf("MALFORMED TRANSACTION %s %s %#v\n", s.Transaction, ver.PayloadHash(), ver)
invalid += 1
}
item, err = txn.Get(graphFinalizationKey(s.Transaction))
if err != nil {
return total, invalid, err
}
val, err = item.ValueCopy(nil)
if err != nil {
return total, invalid, err
}
if s.Hash.String() != hex.EncodeToString(val) {
logger.Printf("DUPLICATED FINALIZATION %s %s\n", s.Hash, hex.EncodeToString(val))
}
dup, _ := crypto.HashFromString(hex.EncodeToString(val))
topo, err := readSnapshotWithTopo(txn, dup)
if err != nil {
return total, invalid, err
}
if topo.Transaction.String() != s.Transaction.String() {
logger.Printf("MALFORMED FINALIZATION %s %s\n", s.Hash, topo.Hash)
invalid += 1
}
}
_, _, hash := computeRoundHash(nodeId, i, snapshots)
round, err := readRound(txn, hash)
if err != nil {
return total, invalid, err
}
if round == nil {
logger.Printf("MISSING ROUND %s %d %s\n", nodeId, i, hash)
invalid += 1
} else if round.NodeId != nodeId || round.Number != i {
logger.Printf("MALFORMED ROUND %s %d %s %s %d\n", nodeId, i, hash, round.NodeId, round.Number)
invalid += 1
}
}
return total, invalid, nil
}
func (s *BadgerStore) ReadAllNodes() []*common.Node {
txn := s.snapshotsDB.NewTransaction(false)
defer txn.Discard()
nodes := s.ReadConsensusNodes()
removed := readNodesInState(txn, graphPrefixNodeRemove)
return append(nodes, removed...)
}
func computeRoundHash(nodeId crypto.Hash, number uint64, snapshots []*common.SnapshotWithTopologicalOrder) (uint64, uint64, crypto.Hash) {
sort.Slice(snapshots, func(i, j int) bool {
if snapshots[i].Timestamp < snapshots[j].Timestamp {
return true
}
if snapshots[i].Timestamp > snapshots[j].Timestamp {
return false
}
a, b := snapshots[i].Hash, snapshots[j].Hash
return bytes.Compare(a[:], b[:]) < 0
})
start := snapshots[0].Timestamp
end := snapshots[len(snapshots)-1].Timestamp
if end >= start+config.SnapshotRoundGap {
err := fmt.Errorf("ComputeRoundHash(%s, %d) %d %d %d", nodeId, number, start, end, start+config.SnapshotRoundGap)
panic(err)
}
buf := make([]byte, 8)
binary.BigEndian.PutUint64(buf, number)
hash := crypto.NewHash(append(nodeId[:], buf...))
for _, s := range snapshots {
if s.Timestamp > end {
panic(nodeId)
}
hash = crypto.NewHash(append(hash[:], s.Hash[:]...))
}
return start, end, hash
}