Struct polkadot_runtime_parachains::hrmp::HrmpChannel

pub struct HrmpChannel {
    pub max_capacity: u32,
    pub max_total_size: u32,
    pub max_message_size: u32,
    pub msg_count: u32,
    pub total_size: u32,
    pub mqc_head: Option<Hash>,
    pub sender_deposit: Balance,
    pub recipient_deposit: Balance,
}

A metadata of an HRMP channel.

Fields

max_capacity: u32

The maximum number of messages that can be pending in the channel at once.

max_total_size: u32

The maximum total size of the messages that can be pending in the channel at once.

max_message_size: u32

The maximum message size that could be put into the channel.

msg_count: u32

The current number of messages pending in the channel. Invariant: should be less or equal to max_capacity.s`.

total_size: u32

The total size in bytes of all message payloads in the channel. Invariant: should be less or equal to max_total_size.

mqc_head: Option<Hash>

A head of the Message Queue Chain for this channel. Each link in this chain has a form: (prev_head, B, H(M)), where

• prev_head: is the previous value of mqc_head or zero if none.
• B: is the [relay-chain] block number in which a message was appended
• H(M): is the hash of the message being appended. This value is initialized to a special value that consists of all zeroes which indicates that no messages were previously added.

sender_deposit: Balance

The amount that the sender supplied as a deposit when opening this channel.

recipient_deposit: Balance

The amount that the recipient supplied as a deposit when accepting opening this channel.

Trait Implementations

impl Decode for HrmpChannel

fn decode<__CodecInputEdqy: Input>( __codec_input_edqy: &mut __CodecInputEdqy, ) -> Result<Self, Error>

Attempt to deserialise the value from input.

fn decode_into<I>( input: &mut I, dst: &mut MaybeUninit<Self>, ) -> Result<DecodeFinished, Error>

where I: Input,

Attempt to deserialize the value from input into a pre-allocated piece of memory.

fn skip<I>(input: &mut I) -> Result<(), Error>

where I: Input,

Attempt to skip the encoded value from input.

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type.

impl Encode for HrmpChannel

fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding.

fn encode_to<__CodecOutputEdqy: Output + ?Sized>( &self, __codec_dest_edqy: &mut __CodecOutputEdqy, )

Convert self to a slice and append it to the destination.

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

Convert self to an owned vector.

fn using_encoded<R, F>(&self, f: F) -> R

where F: FnOnce(&[u8]) -> R,

Convert self to a slice and then invoke the given closure with it.

fn encoded_size(&self) -> usize

Calculates the encoded size.

impl TypeInfo for HrmpChannel

type Identity = HrmpChannel

The type identifying for which type info is provided.

fn type_info() -> Type

Returns the static type identifier for Self.

impl EncodeLike for HrmpChannel