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use crate::*;

use std::fmt::Debug;

/// Trait that must be implemented for Hash Function
pub trait Hasher {
    /// Native type for the hash-function
    type Fr: Copy + Eq + Default + Sync + Send + Debug;

    /// Serializes Self::Fr
    fn serialize(value: Self::Fr) -> Value;

    /// Deserializes Self::Fr
    fn deserialize(value: Value) -> Self::Fr;

    /// Outputs the default leaf (Fr::default())
    fn default_leaf() -> Self::Fr {
        Self::Fr::default()
    }

    /// Calculates hash-function
    fn hash(input: &[Self::Fr]) -> Self::Fr;
}