Struct Cid 

pub struct Cid {
    pub version: u8,
    pub codec: u64,
    pub digest: [u8; 32],
}

A content identifier: version, codec and a sha2-256 digest. Other hash functions are not representable, so a CID naming one is refused at parse time.

Fields

version: u8

codec: u64

digest: [u8; 32]

Implementations

impl Cid

pub fn v1(codec: u64, data: &[u8]) -> Cid

pub fn matches(&self, data: &[u8]) -> bool

Whether data hashes to this CID. The codec is the sender’s claim about the bytes; the digest is what is checked.

pub fn same_block(&self, other: &Cid) -> bool

The same block under any CID version: two CIDs name the same block when codec and digest agree.

pub fn multihash(&self) -> Vec<u8>

pub fn to_bytes(&self) -> Vec<u8>

pub fn from_bytes(b: &[u8]) -> Result<Cid>

Binary CID: v0 is a bare sha2-256 multihash, v1 is 0x01 ‖ codec ‖ multihash.

pub fn supported(&self) -> Result<()>

Refuse codecs NetGet cannot interpret (everything but raw and dag-pb).

pub fn prefix(&self) -> Vec<u8>

Bitswap’s block prefix: version, codec, hash function, digest length.

pub fn from_prefix(prefix: &[u8], data: &[u8]) -> Result<Cid>

The CID a Bitswap 1.1+ block names: its prefix applied to its bytes.

pub fn parse(text: &str) -> Result<Cid>

Text: Qm… (base58btc) for v0, b… (base32, lower case) for v1.

Trait Implementations

impl Clone for Cid

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Cid

impl Debug for Cid

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

Formats the value using the given formatter.

impl Display for Cid

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

Formats the value using the given formatter.

impl Eq for Cid

impl Hash for Cid

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

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 Ord for Cid

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for Cid

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Cid

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for Cid