Append the given contents to the end of the specified file. If a file is too big to create with a single FileCreateTransaction, then it can be created with the first part of its contents, and then appended as many times as necessary to create the entire file.
| Field | Type | Description |
|---|---|---|
| fileID | FileID | The file to which the bytes will be appended |
| contents | Content | The bytes that will be appended to the end of the specified file |