icydb 0.180.37

IcyDB — A schema-first typed query engine and persistence runtime for Internet Computer canisters
Documentation 
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use crate::{design::prelude::*, traits::Validator};

///
/// Sha256
///
/// Validates canonical SHA-256 hex digests.
/// Accepted values are exactly 64 ASCII hexadecimal characters.
///

#[validator]
pub struct Sha256;

impl Validator<str> for Sha256 {
    fn validate(&self, s: &str, ctx: &mut dyn VisitorContext) {
        // length check
        if s.len() != 64 {
            ctx.issue(Issue::Sha256Length { actual: s.len() });
            return;
        }

        // hex characters
        if !s.chars().all(|c| c.is_ascii_hexdigit()) {
            ctx.issue(Issue::Sha256NonHex);
        }
    }
}