mirror of https://github.com/poanetwork/gecko.git
78 lines
2.0 KiB
Go
78 lines
2.0 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 snowman
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import (
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"errors"
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"fmt"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/ava-labs/gecko/ids"
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"github.com/ava-labs/gecko/snow/choices"
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"github.com/ava-labs/gecko/snow/consensus/snowman"
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"github.com/ava-labs/gecko/snow/engine/common/queue"
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"github.com/ava-labs/gecko/utils/logging"
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)
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type parser struct {
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log logging.Logger
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numAccepted, numDropped prometheus.Counter
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vm ChainVM
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}
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func (p *parser) Parse(blkBytes []byte) (queue.Job, error) {
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blk, err := p.vm.ParseBlock(blkBytes)
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if err != nil {
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return nil, err
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}
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return &blockJob{
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log: p.log,
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numAccepted: p.numAccepted,
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numDropped: p.numDropped,
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blk: blk,
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}, nil
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}
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type blockJob struct {
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log logging.Logger
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numAccepted, numDropped prometheus.Counter
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blk snowman.Block
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}
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func (b *blockJob) ID() ids.ID { return b.blk.ID() }
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func (b *blockJob) MissingDependencies() ids.Set {
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missing := ids.Set{}
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if parent := b.blk.Parent(); parent.Status() != choices.Accepted {
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missing.Add(parent.ID())
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}
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return missing
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}
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func (b *blockJob) Execute() error {
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if b.MissingDependencies().Len() != 0 {
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b.numDropped.Inc()
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return errors.New("attempting to accept a block with missing dependencies")
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}
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status := b.blk.Status()
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switch status {
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case choices.Unknown, choices.Rejected:
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b.numDropped.Inc()
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return fmt.Errorf("attempting to execute block with status %s", status)
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case choices.Processing:
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if err := b.blk.Verify(); err != nil {
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b.log.Debug("block %s failed verification during bootstrapping due to %s",
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b.blk.ID(), err)
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}
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b.numAccepted.Inc()
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if err := b.blk.Accept(); err != nil {
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b.log.Debug("block %s failed to accept during bootstrapping due to %s",
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b.blk.ID(), err)
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return fmt.Errorf("failed to accept block in bootstrapping: %w", err)
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}
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}
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return nil
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}
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func (b *blockJob) Bytes() []byte { return b.blk.Bytes() }
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