Struct FileUpdateTransactionBody 

pub struct FileUpdateTransactionBody {
    pub file_id: Option<FileId>,
    pub expiration_time: Option<Timestamp>,
    pub keys: Option<KeyList>,
    pub contents: Vec<u8>,
    pub memo: Option<String>,
}

Update the metadata, and/or replace the content, of a file in the Hedera File Service (HFS).

Any field which is not set (i.e. is null) in this message, other than fileID, SHALL be ignored.
If the keys list for the identified file is an empty KeyList, then this message MUST NOT set any field except expirationTime.

Signature Requirements

Every Key in the keys list for the identified file MUST sign this transaction, if any field other than expirationTime is to be updated.
If the keys list for the identified file is an empty KeyList (because this file was previously created or updated to have an empty KeyList), then the file is considered immutable and this message MUST NOT set any field except expirationTime.
See the File Service specification for a detailed explanation of the signature requirements for all file transactions.

Block Stream Effects

None

Fields

file_id: Option<FileId>

A file identifier for the file to update.

This field is REQUIRED.

expiration_time: Option<Timestamp>

An expiration timestamp.

If set, this value MUST be strictly later than the existing `expirationTime` value, or else it will be ignored.
If set, this value SHALL replace the existing `expirationTime`.
If this field is the only field set, then this transaction SHALL NOT require any signature other than the `payer` for the transaction.
When the network consensus time exceeds the then-current `expirationTime`, the network SHALL expire the file.

keys: Option<KeyList>

The new list of keys that “own” this file.

If set, every key in this `KeyList` MUST sign this transaction.
If set, every key in the _previous_ `KeyList` MUST _also_ sign this transaction.
If this value is an empty `KeyList`, then the file SHALL be immutable after completion of this transaction.

contents: Vec<u8>

An array of bytes.

This value, if set, SHALL _replace_ the existing file content. If this value is set to an empty byte array, the content of the file SHALL be unchanged.

memo: Option<String>

A short description of this file.

This value, if set, MUST NOT exceed `transaction.maxMemoUtf8Bytes` (default 100) bytes when encoded as UTF-8.

Trait Implementations

impl Clone for FileUpdateTransactionBody

fn clone(&self) -> FileUpdateTransactionBody

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FileUpdateTransactionBody

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for FileUpdateTransactionBody

fn default() -> Self

Returns the “default value” for a type.

impl Message for FileUpdateTransactionBody

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for FileUpdateTransactionBody

fn eq(&self, other: &FileUpdateTransactionBody) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for FileUpdateTransactionBody