func ExportAppendChain(blockchain *core.BlockChain, fn string, first uint64, last uint64) error {
glog.Infoln("Exporting blockchain to", fn)
// TODO verify mode perms
fh, err := os.OpenFile(fn, os.O_CREATE|os.O_APPEND|os.O_WRONLY, os.ModePerm)
if err != nil {
return err
}
defer fh.Close()
if err := blockchain.ExportN(fh, first, last); err != nil {
return err
}
glog.Infoln("Exported blockchain to", fn)
return nil
}
