/
deprecated-index-cid-to-offset.go
76 lines (67 loc) · 1.79 KB
/
deprecated-index-cid-to-offset.go
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package indexes
import (
"fmt"
"io"
"os"
"github.com/ipfs/go-cid"
"github.com/rpcpool/yellowstone-faithful/deprecated/compactindex"
)
type Deprecated_CidToOffset_Reader struct {
file io.Closer
index *compactindex.DB
}
func Deprecated_Open_CidToOffset(file string) (*Deprecated_CidToOffset_Reader, error) {
is, err := IsFileOldFormatByPath(file)
if err != nil {
return nil, err
}
if !is {
return nil, fmt.Errorf("not old format")
}
reader, err := os.Open(file)
if err != nil {
return nil, fmt.Errorf("failed to open index file: %w", err)
}
return Deprecated_OpenWithReader_CidToOffset(reader)
}
func Deprecated_OpenWithReader_CidToOffset(reader ReaderAtCloser) (*Deprecated_CidToOffset_Reader, error) {
index, err := compactindex.Open(reader)
if err != nil {
return nil, fmt.Errorf("failed to open index: %w", err)
}
// meta, err := getDefaultMetadata(index)
// if err != nil {
// return nil, err
// }
// if !IsValidNetwork(meta.Network) {
// return nil, fmt.Errorf("invalid network")
// }
// if meta.RootCid == cid.Undef {
// return nil, fmt.Errorf("root cid is undefined")
// }
// if err := meta.AssertIndexKind(Kind_CidToOffset); err != nil {
// return nil, err
// }
return &Deprecated_CidToOffset_Reader{
file: reader,
index: index,
}, nil
}
// Get returns the offset for the given cid.
func (r *Deprecated_CidToOffset_Reader) Get(cid_ cid.Cid) (uint64, error) {
if cid_ == cid.Undef {
return 0, fmt.Errorf("cid is undefined")
}
key := cid_.Bytes()
return r.index.Lookup(key)
}
func (r *Deprecated_CidToOffset_Reader) Close() error {
return r.file.Close()
}
// Meta returns the metadata for the index.
func (r *Deprecated_CidToOffset_Reader) Meta() *Metadata {
return nil
}
func (r *Deprecated_CidToOffset_Reader) Prefetch(b bool) {
r.index.Prefetch(b)
}