mirror of https://github.com/poanetwork/gecko.git
93 lines
2.2 KiB
Go
93 lines
2.2 KiB
Go
// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
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// See the file LICENSE for licensing terms.
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package avalanche
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import (
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"github.com/ava-labs/gecko/ids"
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"github.com/ava-labs/gecko/snow/consensus/avalanche"
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"github.com/ava-labs/gecko/snow/consensus/snowstorm"
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)
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type voter struct {
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t *Transitive
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vdr ids.ShortID
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requestID uint32
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response ids.Set
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deps ids.Set
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}
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func (v *voter) Dependencies() ids.Set { return v.deps }
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func (v *voter) Fulfill(id ids.ID) {
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v.deps.Remove(id)
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v.Update()
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}
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func (v *voter) Abandon(id ids.ID) { v.Fulfill(id) }
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func (v *voter) Update() {
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if v.deps.Len() != 0 {
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return
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}
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results, finished := v.t.polls.Vote(v.requestID, v.vdr, v.response.List())
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if !finished {
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return
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}
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results = v.bubbleVotes(results)
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v.t.Config.Context.Log.Debug("Finishing poll with:\n%s", &results)
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v.t.Consensus.RecordPoll(results)
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txs := []snowstorm.Tx(nil)
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for _, orphanID := range v.t.Consensus.Orphans().List() {
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if tx, err := v.t.Config.VM.GetTx(orphanID); err == nil {
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txs = append(txs, tx)
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} else {
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v.t.Config.Context.Log.Warn("Failed to fetch %s during attempted re-issuance", orphanID)
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}
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}
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if len(txs) > 0 {
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v.t.Config.Context.Log.Debug("Re-issuing %d transactions", len(txs))
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}
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v.t.batch(txs, true /*=force*/, false /*empty*/)
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if v.t.Consensus.Quiesce() {
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v.t.Config.Context.Log.Verbo("Avalanche engine can quiesce")
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return
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}
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v.t.Config.Context.Log.Verbo("Avalanche engine can't quiesce")
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if len(v.t.polls.m) < v.t.Config.Params.ConcurrentRepolls {
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v.t.repoll()
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}
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}
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func (v *voter) bubbleVotes(votes ids.UniqueBag) ids.UniqueBag {
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bubbledVotes := ids.UniqueBag{}
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for _, vote := range votes.List() {
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set := votes.GetSet(vote)
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vtx, err := v.t.Config.State.GetVertex(vote)
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if err != nil {
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continue
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}
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vts := []avalanche.Vertex{vtx}
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for len(vts) > 0 {
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vtx := vts[0]
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vts = vts[1:]
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if status := vtx.Status(); status.Fetched() && !v.t.Consensus.VertexIssued(vtx) {
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vts = append(vts, vtx.Parents()...)
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} else if !status.Decided() && v.t.Consensus.VertexIssued(vtx) {
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bubbledVotes.UnionSet(vtx.ID(), set)
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} else {
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v.t.Config.Context.Log.Debug("Dropping %d vote(s) for %s because the vertex is invalid", set.Len(), vtx.ID())
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}
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}
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}
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return bubbledVotes
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}
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