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common.go
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common.go
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package process
import (
"github.com/ElrondNetwork/elrond-go/data/block"
"github.com/ElrondNetwork/elrond-go/dataRetriever"
"github.com/ElrondNetwork/elrond-go/marshal"
"github.com/ElrondNetwork/elrond-go/storage"
)
// EmptyChannel empties the given channel
func EmptyChannel(ch chan bool) {
for len(ch) > 0 {
<-ch
}
}
// GetShardHeader gets the header, which is associated with the given hash, from pool or storage
func GetShardHeader(
hash []byte,
cacher storage.Cacher,
marshalizer marshal.Marshalizer,
storageService dataRetriever.StorageService,
) (*block.Header, error) {
if cacher == nil {
return nil, ErrNilCacher
}
if marshalizer == nil {
return nil, ErrNilMarshalizer
}
if storageService == nil {
return nil, ErrNilStorage
}
hdr, err := GetShardHeaderFromPool(hash, cacher)
if err != nil {
hdr, err = GetShardHeaderFromStorage(hash, marshalizer, storageService)
if err != nil {
return nil, err
}
}
return hdr, nil
}
// GetMetaHeader gets the header, which is associated with the given hash, from pool or storage
func GetMetaHeader(
hash []byte,
cacher storage.Cacher,
marshalizer marshal.Marshalizer,
storageService dataRetriever.StorageService,
) (*block.MetaBlock, error) {
if cacher == nil {
return nil, ErrNilCacher
}
if marshalizer == nil {
return nil, ErrNilMarshalizer
}
if storageService == nil {
return nil, ErrNilStorage
}
hdr, err := GetMetaHeaderFromPool(hash, cacher)
if err != nil {
hdr, err = GetMetaHeaderFromStorage(hash, marshalizer, storageService)
if err != nil {
return nil, err
}
}
return hdr, nil
}
// GetShardHeaderFromPool gets the header, which is associated with the given hash, from pool
func GetShardHeaderFromPool(
hash []byte,
cacher storage.Cacher,
) (*block.Header, error) {
if cacher == nil {
return nil, ErrNilCacher
}
obj, ok := cacher.Peek(hash)
if !ok {
return nil, ErrMissingHeader
}
hdr, ok := obj.(*block.Header)
if !ok {
return nil, ErrWrongTypeAssertion
}
return hdr, nil
}
// GetMetaHeaderFromPool gets the header, which is associated with the given hash, from pool
func GetMetaHeaderFromPool(
hash []byte,
cacher storage.Cacher,
) (*block.MetaBlock, error) {
if cacher == nil {
return nil, ErrNilCacher
}
obj, ok := cacher.Peek(hash)
if !ok {
return nil, ErrMissingHeader
}
hdr, ok := obj.(*block.MetaBlock)
if !ok {
return nil, ErrWrongTypeAssertion
}
return hdr, nil
}
// GetShardHeaderFromStorage gets the header, which is associated with the given hash, from storage
func GetShardHeaderFromStorage(
hash []byte,
marshalizer marshal.Marshalizer,
storageService dataRetriever.StorageService,
) (*block.Header, error) {
buffHdr, err := GetMarshalizedHeaderFromStorage(dataRetriever.BlockHeaderUnit, hash, marshalizer, storageService)
if err != nil {
return nil, err
}
hdr := &block.Header{}
err = marshalizer.Unmarshal(hdr, buffHdr)
if err != nil {
return nil, ErrUnmarshalWithoutSuccess
}
return hdr, nil
}
// GetMetaHeaderFromStorage gets the header, which is associated with the given hash, from storage
func GetMetaHeaderFromStorage(
hash []byte,
marshalizer marshal.Marshalizer,
storageService dataRetriever.StorageService,
) (*block.MetaBlock, error) {
buffHdr, err := GetMarshalizedHeaderFromStorage(dataRetriever.MetaBlockUnit, hash, marshalizer, storageService)
if err != nil {
return nil, err
}
hdr := &block.MetaBlock{}
err = marshalizer.Unmarshal(hdr, buffHdr)
if err != nil {
return nil, ErrUnmarshalWithoutSuccess
}
return hdr, nil
}
// GetMarshalizedHeaderFromStorage gets the marshalized header, which is associated with the given hash, from storage
func GetMarshalizedHeaderFromStorage(
blockUnit dataRetriever.UnitType,
hash []byte,
marshalizer marshal.Marshalizer,
storageService dataRetriever.StorageService,
) ([]byte, error) {
if marshalizer == nil {
return nil, ErrNilMarshalizer
}
if storageService == nil {
return nil, ErrNilStorage
}
hdrStore := storageService.GetStorer(blockUnit)
if hdrStore == nil {
return nil, ErrNilHeadersStorage
}
buffHdr, err := hdrStore.Get(hash)
if err != nil {
return nil, ErrMissingHeader
}
return buffHdr, nil
}