Enum HeadersDirection 

pub enum HeadersDirection {
    Falling,
    Rising,
}

Represents the direction for a headers request depending on the reverse field of the request.

The response must contain a number of block headers, of rising number when reverse is 0, falling when 1

Ref: https://github.com/ethereum/devp2p/blob/master/caps/eth.md#getblockheaders-0x03

HeadersDirection::Rising block numbers for reverse == 0 == false HeadersDirection::Falling block numbers for reverse == 1 == true

See also https://github.com/ethereum/devp2p/blob/master/caps/eth.md#getblockheaders-0x03

Variants

Falling

Falling block number.

Rising

Rising block number.

Implementations

impl HeadersDirection

pub const fn is_rising(&self) -> bool

Returns true for rising block numbers

pub const fn is_falling(&self) -> bool

Returns true for falling block numbers

pub const fn new(reverse: bool) -> HeadersDirection

Converts the bool into a direction.

Returns:

HeadersDirection::Rising block numbers for reverse == 0 == false HeadersDirection::Falling block numbers for reverse == 1 == true

Trait Implementations

impl<'arbitrary> Arbitrary<'arbitrary> for HeadersDirection

fn arbitrary( u: &mut Unstructured<'arbitrary>, ) -> Result<HeadersDirection, Error>

Generate an arbitrary value of Self from the given unstructured data.

fn arbitrary_take_rest( u: Unstructured<'arbitrary>, ) -> Result<HeadersDirection, Error>

Generate an arbitrary value of Self from the entirety of the given unstructured data.

fn size_hint(depth: usize) -> (usize, Option<usize>)

Get a size hint for how many bytes out of an Unstructured this type needs to construct itself.

fn try_size_hint( depth: usize, ) -> Result<(usize, Option<usize>), MaxRecursionReached>

Get a size hint for how many bytes out of an Unstructured this type needs to construct itself.

impl Clone for HeadersDirection

fn clone(&self) -> HeadersDirection

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for HeadersDirection

impl Debug for HeadersDirection

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

Formats the value using the given formatter.

impl Decodable for HeadersDirection

fn decode(buf: &mut &[u8]) -> Result<HeadersDirection, Error>

Decodes the blob into the appropriate type. buf must be advanced past the decoded object.

impl Default for HeadersDirection

fn default() -> HeadersDirection

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for HeadersDirection

fn deserialize<__D>( __deserializer: __D, ) -> Result<HeadersDirection, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Encodable for HeadersDirection

fn encode(&self, out: &mut dyn BufMut)

Encodes the type into the out buffer.

fn length(&self) -> usize

Returns the length of the encoding of this type in bytes.

impl Eq for HeadersDirection

impl From<bool> for HeadersDirection

fn from(reverse: bool) -> HeadersDirection

Converts to this type from the input type.

impl Hash for HeadersDirection

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for HeadersDirection

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for HeadersDirection

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for HeadersDirection

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 1 byte

Size for each variant:

• Falling: 0 bytes
• Rising: 0 bytes