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consensus: fix nonce handling

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It was broken somewhere between 2f490a3403 and
85ce207f40 leading to panic on watch only node:

2021-07-21T16:21:39.201+0200    INFO    received Commit {"validator": 3}
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x28 pc=0xbcc59e]

goroutine 486 [running]:
github.com/nspcc-dev/neo-go/pkg/consensus.(*service).newBlockFromContext(0xc0001629a0, 0xc000308000, 0xc0010fa000, 0x2cb417800)
        github.com/nspcc-dev/neo-go/pkg/consensus/consensus.go:664 +0xbe
github.com/nspcc-dev/dbft.(*Context).MakeHeader(...)
        github.com/nspcc-dev/dbft@v0.0.0-20210302103605-cc75991b7cfb/context.go:270
github.com/nspcc-dev/dbft.(*DBFT).onCommit(0xc000308000, 0x138c998, 0xc000115110)
        github.com/nspcc-dev/dbft@v0.0.0-20210302103605-cc75991b7cfb/dbft.go:487 +0x575
github.com/nspcc-dev/dbft.(*DBFT).OnReceive(0xc000308000, 0x138c998, 0xc000115110)
        github.com/nspcc-dev/dbft@v0.0.0-20210302103605-cc75991b7cfb/dbft.go:251 +0xef5
github.com/nspcc-dev/neo-go/pkg/consensus.(*service).eventLoop(0xc0001629a0)
        github.com/nspcc-dev/neo-go/pkg/consensus/consensus.go:312 +0x7d6
created by github.com/nspcc-dev/neo-go/pkg/consensus.(*service).Start
        github.com/nspcc-dev/neo-go/pkg/consensus/consensus.go:262 +0xdc

In fact, nonce is correctly provided by dbft library (since Legacy), we just
need to use it here.
This commit is contained in:
Roman Khimov 2021-07-21 18:39:57 +03:00
parent 7d6898677b
commit 4d2ecab16f
4 changed files with 5 additions and 16 deletions
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14
pkg/consensus/consensus.go
View file

@ -1,8 +1,6 @@
package consensus
import (
"crypto/rand"
"encoding/binary"
"errors"
"fmt"
"sort"
@ -241,19 +239,9 @@ func (s *service) newPrepareRequest() payload.PrepareRequest {
panic(err)
}
}
r.nonce = s.getNonce()
return r
}
func (s *service) getNonce() uint64 {
b := make([]byte, 8)
_, err := rand.Read(b)
if err != nil {
panic(err)
}
return binary.LittleEndian.Uint64(b)
}
func (s *service) Start() {
if s.started.CAS(false, true) {
s.log.Info("starting consensus service")
@ -661,7 +649,7 @@ func (s *service) newBlockFromContext(ctx *dbft.Context) block.Block {
block := &neoBlock{network: s.ProtocolConfiguration.Magic}
block.Block.Timestamp = ctx.Timestamp / nsInMs
block.Block.Nonce = ctx.PreparationPayloads[ctx.PrimaryIndex].GetPrepareRequest().Nonce()
block.Block.Nonce = ctx.Nonce
block.Block.Index = ctx.BlockIndex
if s.ProtocolConfiguration.StateRootInHeader {
sr, err := s.Chain.GetStateModule().GetStateRoot(ctx.BlockIndex - 1)