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recover.go
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recover.go
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package tortoise
import (
"context"
"errors"
"fmt"
"github.com/spacemeshos/go-spacemesh/common/types"
"github.com/spacemeshos/go-spacemesh/datastore"
"github.com/spacemeshos/go-spacemesh/sql"
"github.com/spacemeshos/go-spacemesh/sql/ballots"
"github.com/spacemeshos/go-spacemesh/sql/blocks"
"github.com/spacemeshos/go-spacemesh/sql/certificates"
"github.com/spacemeshos/go-spacemesh/sql/layers"
"github.com/spacemeshos/go-spacemesh/system"
)
// Recover tortoise state from database.
func Recover(db *datastore.CachedDB, beacon system.BeaconGetter, opts ...Opt) (*Tortoise, error) {
trtl, err := New(opts...)
if err != nil {
return nil, err
}
latest, err := ballots.LatestLayer(db)
if err != nil {
return nil, fmt.Errorf("failed to load latest known layer: %v", err)
}
if latest <= types.GetEffectiveGenesis() {
return trtl, nil
}
for lid := types.GetEffectiveGenesis().Add(1); !lid.After(latest); lid = lid.Add(1) {
if err := RecoverLayer(context.Background(), trtl, db, beacon, lid); err != nil {
return nil, fmt.Errorf("failed to load tortoise state at layer %d: %w", lid, err)
}
}
return trtl, nil
}
func RecoverLayer(ctx context.Context, trtl *Tortoise, db *datastore.CachedDB, beacon system.BeaconGetter, lid types.LayerID) error {
if lid.FirstInEpoch() {
if err := db.IterateEpochATXHeaders(lid.GetEpoch(), func(header *types.ActivationTxHeader) bool {
trtl.OnAtx(header)
return true
}); err != nil {
return err
}
beacon, err := beacon.GetBeacon(lid.GetEpoch())
if err != nil && !errors.Is(err, sql.ErrNotFound) {
return err
}
if err == nil {
trtl.OnBeacon(lid.GetEpoch(), beacon)
}
}
blocksrst, err := blocks.Layer(db, lid)
if err != nil {
return err
}
for _, block := range blocksrst {
valid, err := blocks.IsValid(db, block.ID())
if err != nil && errors.Is(err, sql.ErrNotFound) {
return err
}
if valid {
trtl.OnValidBlock(block.ToVote())
} else {
trtl.OnBlock(block.ToVote())
}
hare, err := certificates.GetHareOutput(db, lid)
if err != nil && !errors.Is(err, sql.ErrNotFound) {
return err
}
if err == nil {
trtl.OnHareOutput(lid, hare)
}
}
ballotsrst, err := ballots.Layer(db, lid)
if err != nil {
return err
}
for _, ballot := range ballotsrst {
trtl.OnBallot(ballot)
}
coin, err := layers.GetWeakCoin(db, lid)
if err != nil && !errors.Is(err, sql.ErrNotFound) {
return err
}
if err == nil {
trtl.OnWeakCoin(lid, coin)
}
trtl.TallyVotes(ctx, lid)
return nil
}