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epoch_setups.go
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epoch_setups.go
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package badger
import (
"github.com/dgraph-io/badger/v2"
"github.com/onflow/flow-go/model/flow"
"github.com/onflow/flow-go/module"
"github.com/onflow/flow-go/module/metrics"
"github.com/onflow/flow-go/storage/badger/operation"
"github.com/onflow/flow-go/storage/badger/transaction"
)
type EpochSetups struct {
db *badger.DB
cache *Cache[flow.Identifier, *flow.EpochSetup]
}
// NewEpochSetups instantiates a new EpochSetups storage.
func NewEpochSetups(collector module.CacheMetrics, db *badger.DB) *EpochSetups {
store := func(id flow.Identifier, setup *flow.EpochSetup) func(*transaction.Tx) error {
return transaction.WithTx(operation.SkipDuplicates(operation.InsertEpochSetup(id, setup)))
}
retrieve := func(id flow.Identifier) func(*badger.Txn) (*flow.EpochSetup, error) {
return func(tx *badger.Txn) (*flow.EpochSetup, error) {
var setup flow.EpochSetup
err := operation.RetrieveEpochSetup(id, &setup)(tx)
return &setup, err
}
}
es := &EpochSetups{
db: db,
cache: newCache[flow.Identifier, *flow.EpochSetup](collector, metrics.ResourceEpochSetup,
withLimit[flow.Identifier, *flow.EpochSetup](4*flow.DefaultTransactionExpiry),
withStore(store),
withRetrieve(retrieve)),
}
return es
}
func (es *EpochSetups) StoreTx(setup *flow.EpochSetup) func(tx *transaction.Tx) error {
return es.cache.PutTx(setup.ID(), setup)
}
func (es *EpochSetups) retrieveTx(setupID flow.Identifier) func(tx *badger.Txn) (*flow.EpochSetup, error) {
return func(tx *badger.Txn) (*flow.EpochSetup, error) {
val, err := es.cache.Get(setupID)(tx)
if err != nil {
return nil, err
}
return val, nil
}
}
// ByID will return the EpochSetup event by its ID.
// Error returns:
// * storage.ErrNotFound if no EpochSetup with the ID exists
func (es *EpochSetups) ByID(setupID flow.Identifier) (*flow.EpochSetup, error) {
tx := es.db.NewTransaction(false)
defer tx.Discard()
return es.retrieveTx(setupID)(tx)
}