copy method

Future<bool> copy(String from, String to, String hash)

Asks the node to copy from to to under the served root, reusing the node-side bytes — but only when from still hashes to hash.

Returns true when the node verified and copied; false when from drifted or vanished, in which case the caller falls back to a byte transfer. A false outcome is a normal reply, not an error.

Implementation

Future<bool> copy(String from, String to, String hash) async {
  final reply = await _call(
    DriveOp.copy,
    fields: {'from': from, 'to': to, 'hash': hash},
  );
  return reply.header['copied'] == true;
}