Struct QueryHeader 

pub struct QueryHeader {
    pub payment: Option<Transaction>,
    pub response_type: i32,
}

A standard query header.
Each query from the client to the node must contain a QueryHeader, which specifies the desired response type, and includes a payment transaction that will compensate the network for responding to the query. The payment may be blank if the query is free.

The payment transaction MUST be a cryptoTransfer from the payer account to the account of the node where the query is submitted.
If the payment is sufficient, the network SHALL respond with the response type requested.
If the response type is COST_ANSWER the payment MUST be unset. A state proof SHALL be available for some types of information.
A state proof SHALL be available for a Record, but not a receipt, and the response entry for each supported “get info” query.

Fields

payment: Option<Transaction>

A signed CryptoTransferTransaction to pay query fees.

This MUST transfer HBAR from the "payer" to the responding node account sufficient to pay the query fees.

response_type: i32

A type of query response requested.

Implementations

impl QueryHeader

pub fn response_type(&self) -> ResponseType

Returns the enum value of response_type, or the default if the field is set to an invalid enum value.

pub fn set_response_type(&mut self, value: ResponseType)

Sets response_type to the provided enum value.

Trait Implementations

impl Clone for QueryHeader

fn clone(&self) -> QueryHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryHeader

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

Formats the value using the given formatter.

impl Default for QueryHeader

fn default() -> Self

Returns the “default value” for a type.

impl Message for QueryHeader

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 QueryHeader

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for QueryHeader