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tx_job.go
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tx_job.go
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// Copyright (C) 2019-2022, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package bootstrap
import (
"context"
"errors"
"fmt"
"github.com/prometheus/client_golang/prometheus"
"go.uber.org/zap"
"github.com/ava-labs/avalanchego/ids"
"github.com/ava-labs/avalanchego/snow/choices"
"github.com/ava-labs/avalanchego/snow/consensus/snowstorm"
"github.com/ava-labs/avalanchego/snow/engine/avalanche/vertex"
"github.com/ava-labs/avalanchego/snow/engine/common/queue"
"github.com/ava-labs/avalanchego/utils/logging"
)
var errMissingTxDependenciesOnAccept = errors.New("attempting to accept a transaction with missing dependencies")
type txParser struct {
log logging.Logger
numAccepted, numDropped prometheus.Counter
vm vertex.DAGVM
}
func (p *txParser) Parse(ctx context.Context, txBytes []byte) (queue.Job, error) {
tx, err := p.vm.ParseTx(ctx, txBytes)
if err != nil {
return nil, err
}
return &txJob{
log: p.log,
numAccepted: p.numAccepted,
numDropped: p.numDropped,
tx: tx,
}, nil
}
type txJob struct {
log logging.Logger
numAccepted, numDropped prometheus.Counter
tx snowstorm.Tx
}
func (t *txJob) ID() ids.ID { return t.tx.ID() }
func (t *txJob) MissingDependencies(context.Context) (ids.Set, error) {
missing := ids.Set{}
deps, err := t.tx.Dependencies()
if err != nil {
return missing, err
}
for _, dep := range deps {
if dep.Status() != choices.Accepted {
missing.Add(dep.ID())
}
}
return missing, nil
}
// Returns true if this tx job has at least 1 missing dependency
func (t *txJob) HasMissingDependencies(context.Context) (bool, error) {
deps, err := t.tx.Dependencies()
if err != nil {
return false, err
}
for _, dep := range deps {
if dep.Status() != choices.Accepted {
return true, nil
}
}
return false, nil
}
func (t *txJob) Execute(ctx context.Context) error {
hasMissingDeps, err := t.HasMissingDependencies(ctx)
if err != nil {
return err
}
if hasMissingDeps {
t.numDropped.Inc()
return errMissingTxDependenciesOnAccept
}
status := t.tx.Status()
switch status {
case choices.Unknown, choices.Rejected:
t.numDropped.Inc()
return fmt.Errorf("attempting to execute transaction with status %s", status)
case choices.Processing:
txID := t.tx.ID()
if err := t.tx.Verify(ctx); err != nil {
t.log.Error("transaction failed verification during bootstrapping",
zap.Stringer("txID", txID),
zap.Error(err),
)
return fmt.Errorf("failed to verify transaction in bootstrapping: %w", err)
}
t.numAccepted.Inc()
t.log.Trace("accepting transaction in bootstrapping",
zap.Stringer("txID", txID),
)
if err := t.tx.Accept(ctx); err != nil {
t.log.Error("transaction failed to accept during bootstrapping",
zap.Stringer("txID", txID),
zap.Error(err),
)
return fmt.Errorf("failed to accept transaction in bootstrapping: %w", err)
}
}
return nil
}
func (t *txJob) Bytes() []byte { return t.tx.Bytes() }