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remove: unused function and add new types
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,119 +1,25 @@ | ||
| use super::merkletree::Leaf; | ||
| use crate::{Hash, Leaf}; | ||
| use tiny_keccak::{Hasher, Keccak}; | ||
|
|
||
| /// # Verify if `x: int` is power of 2 | ||
| /// - params `x: int` | ||
| /// - return `bool` | ||
| /// ```rust | ||
| /// use merkletreers::utils::is_power_2; | ||
| /// | ||
| /// assert_eq!(is_power_2(2), true); | ||
| /// assert_eq!(is_power_2(3), false); | ||
| /// assert_eq!(is_power_2(16), true); | ||
| /// assert_eq!(is_power_2(900), false); | ||
| /// ``` | ||
| pub fn is_power_2(number: u32) -> bool { | ||
| let left: bool = number & (number - 1) == 0; | ||
| let right: bool = number != 0; | ||
|
|
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| left && right | ||
| } | ||
|
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||
| /// # Hash `data: str` using keccak256 | ||
| /// - params `data: str` | ||
| /// - return `hexadecimal: str` | ||
| /// | ||
| /// ```rust | ||
| /// use merkletreers::utils::to_keccak256; | ||
| /// | ||
| /// assert_eq!( | ||
| /// to_keccak256("merkle".to_string()), | ||
| /// "326fe0d8a70ab934a7bf9d1323c6d87ee37bbe70079f82e72203b1e07c0c185c" | ||
| /// ); | ||
| /// | ||
| /// assert_eq!( | ||
| /// to_keccak256("tree".to_string()), | ||
| /// "b2510336c6497719adadc7ade198c988520f3349445f074dc729df0f3c2b12ad" | ||
| /// ); | ||
| /// | ||
| /// assert_eq!( | ||
| /// to_keccak256("bitcoin".to_string()), | ||
| /// "7dee6e1aa550de37364ec77e03e62ea56bf42037b8297280de9d844d88444e4d" | ||
| /// ); | ||
| /// | ||
| /// assert_eq!( | ||
| /// to_keccak256("ethereum".to_string()), | ||
| /// "541111248b45b7a8dc3f5579f630e74cb01456ea6ac067d3f4d793245a255155" | ||
| /// ); | ||
| /// ``` | ||
| pub fn to_keccak256(message: String) -> Leaf { | ||
| let mut k256 = Keccak::v256(); | ||
| let mut result = [0; 32]; | ||
|
|
||
| k256.update(message.as_bytes()); | ||
| k256.finalize(&mut result); | ||
|
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| hex::encode(result) | ||
| } | ||
|
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||
| /// # Half a `arr: Vec<T>` in a pairs | ||
| /// - params `arr: Vec<T>` | ||
| /// - return `Vec<T>: (Vec<T>, Vec<T>) | ||
| /// | ||
| /// ```rust | ||
| /// use merkletreers::utils::half; | ||
| /// | ||
| /// assert_eq!( | ||
| /// half(&vec![1,2,3,4]), | ||
| /// (vec![1, 2], vec![3, 4]) | ||
| /// ); | ||
| /// | ||
| /// assert_eq!( | ||
| /// half(&vec!["a", "b", "c", "d", "e", "f"]), | ||
| /// (vec!["a", "b", "c"], vec!["d", "e", "f"]) | ||
| /// ); | ||
| /// ``` | ||
| pub fn half<T: std::clone::Clone>(arr: &Vec<T>) -> (Vec<T>, Vec<T>) { | ||
| let m = arr.len() / 2; | ||
| let left = &arr[0..m]; | ||
| let right = &arr[m..]; | ||
|
|
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| (left.to_vec(), right.to_vec()) | ||
| } | ||
|
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||
| #[derive(PartialEq, Debug, Clone)] | ||
| pub enum Side { | ||
| LEFT = 0, | ||
| RIGHT = 1, | ||
| } | ||
| impl From<u8> for Side { | ||
| fn from(num: u8) -> Self { | ||
| match num { | ||
| 0 => Side::LEFT, | ||
| 1 => Side::RIGHT, | ||
| _ => panic!("Invalid value for Side enum, must be either `0` or `1`"), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| #[derive(PartialEq, Debug, Clone)] | ||
| pub struct Node { | ||
| pub data: [u8; 32], | ||
| pub side: Side, | ||
| } | ||
|
|
||
| pub fn hash_it(data: &[u8], buffer: &mut [u8; 32]) { | ||
| pub fn hash_it(data: &[u8], buffer: &mut Hash) { | ||
| let mut k256 = Keccak::v256(); | ||
|
|
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| k256.update(data); | ||
| k256.finalize(buffer); | ||
| } | ||
|
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||
| pub fn hash_function(left: &[u8; 32], right: &[u8; 32], buffer: &mut [u8; 32]) { | ||
| pub fn hash_function(left: &Leaf, right: &Leaf, buffer: &mut Hash) { | ||
| let mut concat = [0u8; 64]; | ||
| concat[..32].copy_from_slice(left); | ||
| concat[32..].copy_from_slice(right); | ||
|
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| hash_it(&concat, buffer) | ||
| } | ||
|
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| pub fn is_power_of_two(number: u32) -> bool { | ||
| let left: bool = number & (number - 1) == 0; | ||
| let right: bool = number != 0; | ||
|
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||
| let r = left && right; | ||
| r | ||
| } |