func extractData(buf *ledgerutil.Buffer) (*common.BlockData, []*txindexInfo, error) {
data := &common.BlockData{}
var txOffsets []*txindexInfo
var numItems uint64
var err error
if numItems, err = buf.DecodeVarint(); err != nil {
return nil, nil, err
}
for i := uint64(0); i < numItems; i++ {
var txEnvBytes []byte
var txid string
txOffset := buf.GetBytesConsumed()
if txEnvBytes, err = buf.DecodeRawBytes(false); err != nil {
return nil, nil, err
}
if txid, err = extractTxID(txEnvBytes); err != nil {
return nil, nil, err
}
data.Data = append(data.Data, txEnvBytes)
idxInfo := &txindexInfo{txid, &locPointer{txOffset, buf.GetBytesConsumed() - txOffset}}
txOffsets = append(txOffsets, idxInfo)
}
return data, txOffsets, nil
}
func extractMetadata(buf *ledgerutil.Buffer) (*common.BlockMetadata, error) {
metadata := &common.BlockMetadata{}
var numItems uint64
var metadataEntry []byte
var err error
if numItems, err = buf.DecodeVarint(); err != nil {
return nil, err
}
for i := uint64(0); i < numItems; i++ {
if metadataEntry, err = buf.DecodeRawBytes(false); err != nil {
return nil, err
}
metadata.Metadata = append(metadata.Metadata, metadataEntry)
}
return metadata, nil
}
func extractHeader(buf *ledgerutil.Buffer) (*common.BlockHeader, error) {
header := &common.BlockHeader{}
var err error
if header.Number, err = buf.DecodeVarint(); err != nil {
return nil, err
}
if header.DataHash, err = buf.DecodeRawBytes(false); err != nil {
return nil, err
}
if header.PreviousHash, err = buf.DecodeRawBytes(false); err != nil {
return nil, err
}
return header, nil
}