Struct ContractSelector 

pub struct ContractSelector(/* private fields */);

The first CONTRACT_SELECTOR_LEN bytes of an op contract digest.

use cratestack_core::ContractSelector;

let digest = [0xab; 32];
let selector = ContractSelector::of(&digest);
assert_eq!(selector.to_header_value().len(), 11);
assert!(selector.matches(&digest));
assert!(!selector.matches(&[0xac; 32]));
let parsed = ContractSelector::from_header_value(selector.to_header_value().as_bytes());
assert_eq!(parsed.unwrap(), selector);

Implementations

impl ContractSelector

pub fn of(digest: &[u8; 32]) -> ContractSelector

The selector of digest.

pub fn matches(&self, digest: &[u8; 32]) -> bool

Whether digest starts with these bytes.

pub fn to_header_value(&self) -> String

The header value: 11 characters of unpadded base64url.

pub fn from_header_value( value: &[u8], ) -> Result<ContractSelector, CratestackError>

Parse a received header value, strictly: exactly 11 characters of the base64url alphabet, no padding, and the 2 unused trailing bits zero, so each selector has exactly one spelling.

Fails with CratestackError::BadRequest, whose public message says only that the header is malformed.

Trait Implementations

impl Clone for ContractSelector

fn clone(&self) -> ContractSelector

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ContractSelector

impl Debug for ContractSelector

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

Formats the value using the given formatter.

impl Eq for ContractSelector

impl Hash for ContractSelector

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 ContractSelector

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ContractSelector