/
atxsync.go
71 lines (66 loc) · 1.58 KB
/
atxsync.go
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package atxsync
import (
"context"
"math/rand/v2"
"time"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
"github.com/spacemeshos/go-spacemesh/common/types"
"github.com/spacemeshos/go-spacemesh/sql"
"github.com/spacemeshos/go-spacemesh/sql/atxs"
"github.com/spacemeshos/go-spacemesh/system"
)
func getMissing(db *sql.Database, set []types.ATXID) ([]types.ATXID, error) {
missing := []types.ATXID{}
for _, atx := range set {
exist, err := atxs.Has(db, atx)
if err != nil {
return nil, err
}
if !exist {
missing = append(missing, atx)
}
}
return missing, nil
}
// Download specified set of atxs from peers in the network.
//
// actual retry interval will be between [retryInterval, 2*retryInterval].
func Download(
ctx context.Context,
retryInterval time.Duration,
logger *zap.Logger,
db *sql.Database,
fetcher system.AtxFetcher,
set []types.ATXID,
) error {
total := len(set)
for {
missing, err := getMissing(db, set)
if err != nil {
return err
}
set = missing
downloaded := total - len(missing)
logger.Info("downloaded atxs",
zap.Int("total", total),
zap.Int("downloaded", downloaded),
zap.Array("missing", zapcore.ArrayMarshalerFunc(func(enc zapcore.ArrayEncoder) error {
for _, atx := range missing {
enc.AppendString(atx.ShortString())
}
return nil
})))
if len(missing) == 0 {
return nil
}
if err := fetcher.GetAtxs(ctx, missing); err != nil {
logger.Debug("failed to fetch atxs", zap.Error(err))
select {
case <-ctx.Done():
return ctx.Err()
case <-time.After(retryInterval + rand.N(retryInterval)):
}
}
}
}