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dbft: fix the deadlock reason in four-good-nodes setup #3

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dbft: fix the deadlock reason in four-good-nodes setup #3

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17 changes: 13 additions & 4 deletions context.go
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Original file line number Diff line number Diff line change
Expand Up @@ -56,7 +56,12 @@ type Context struct {

// PreparationPayloads stores consensus Prepare* payloads for the current epoch.
PreparationPayloads []payload.ConsensusPayload
// CommitPayloads stores consensus Commit payloads for the current epoch.
// CommitPayloads stores consensus Commit payloads sent throughout all epochs. It
// is assumed that valid Commit payload can only be sent once by a single node per
// the whole set of consensus epochs for particular block. Invalid commit payloads
// are kicked off this list immediately (if PrepareRequest was received for the
// current round, so it's possible to verify Commit against it) or stored till
// the corresponding PrepareRequest receiving.
CommitPayloads []payload.ConsensusPayload
// ChangeViewPayloads stores consensus ChangeView payloads for the current epoch.
ChangeViewPayloads []payload.ConsensusPayload
Expand Down Expand Up @@ -101,7 +106,8 @@ func (c *Context) IsBackup() bool {
// WatchOnly returns true iff node takes no active part in consensus.
func (c *Context) WatchOnly() bool { return c.MyIndex < 0 || c.Config.WatchOnly() }

// CountCommitted returns number of received Commit messages for the current epoch.
// CountCommitted returns number of received Commit messages not only for the current
// epoch but also for any other epoch.
func (c *Context) CountCommitted() (count int) {
for i := range c.CommitPayloads {
if c.CommitPayloads[i] != nil {
Expand Down Expand Up @@ -135,7 +141,8 @@ func (c *Context) ResponseSent() bool {
return !c.WatchOnly() && c.PreparationPayloads[c.MyIndex] != nil
}

// CommitSent returns true iff Commit message was sent for the current epoch.
// CommitSent returns true iff Commit message was sent for the current epoch
// assuming that the node can't go further than current epoch after commit was sent.
func (c *Context) CommitSent() bool {
return !c.WatchOnly() && c.CommitPayloads[c.MyIndex] != nil
}
Expand Down Expand Up @@ -203,7 +210,9 @@ func (c *Context) reset(view byte, ts uint64) {

n := len(c.Validators)
c.ChangeViewPayloads = make([]payload.ConsensusPayload, n)
c.CommitPayloads = make([]payload.ConsensusPayload, n)
if view == 0 {
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c.CommitPayloads = make([]payload.ConsensusPayload, n)
}
c.PreparationPayloads = make([]payload.ConsensusPayload, n)

c.Transactions = make(map[util.Uint256]block.Transaction)
Expand Down