lotus/storage/sealer/commitment/commd.go

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642 B
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package commitment
import (
"io"
"os"
"path/filepath"
)
const treeDFile = "sc-02-data-tree-d.dat"
// TreeDCommD reads CommD from tree-d
func TreeDCommD(cache string) ([32]byte, error) {
// Open the tree-d file for reading
file, err := os.Open(filepath.Join(cache, treeDFile))
if err != nil {
return [32]byte{}, err
}
defer file.Close() // nolint:errcheck
// Seek to 32 bytes from the end of the file
_, err = file.Seek(-32, io.SeekEnd)
if err != nil {
return [32]byte{}, err
}
// Read the last 32 bytes
var commD [32]byte
_, err = file.Read(commD[:])
if err != nil {
return [32]byte{}, err
}
return commD, nil
}