Method Read

ethstorage/data_shard.go:154–167

Read the encoded data from storage and decode it.

(kvIdx uint64, readLen int, commit common.Hash)

// Read the encoded data from storage and decode it.
func (ds *DataShard) Read(kvIdx uint64, readLen int, commit common.Hash) ([]byte, error) {
	bs, err := ds.readWith(kvIdx, int(ds.kvSize), func(cdata []byte, chunkIdx uint64) []byte {
		encodeKey := calcEncodeKey(commit, chunkIdx, ds.dataFiles[0].miner)
		return decodeChunk(ds.chunkSize, cdata, ds.dataFiles[0].encodeType, encodeKey)
	})
	if err != nil {
		return nil, err
	}

	if err = checkCommit(commit, bs); err != nil {
		return nil, err
	}
	return bs[0:readLen], nil
}

// Read the encoded data from storage and decode it.
func (ds *DataShard) ReadWithMeta(kvIdx uint64, readLen int) ([]byte, []byte, error) {