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March 27, 2024 04:32
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| use core::fmt; | |
| use sha2::{ Sha256, Digest }; | |
| use std::{ | |
| error::Error, | |
| fmt::{Debug, Display}, | |
| io, | |
| }; | |
| #[derive(Debug, Clone, Copy)] | |
| struct AuctionDetails {} | |
| #[derive(Debug, Clone)] | |
| enum HashError<'a> { | |
| Error_message(&'a str), | |
| } | |
| trait Auction { | |
| fn commit<T: Display>(a: T, b: T) -> Result<Vec<Vec<u8>>, HashError<'static>>; | |
| fn open<T: Display>( | |
| input: T, | |
| commitment: Vec<u8> | |
| ) -> Result<bool, HashError<'static>>; | |
| } | |
| impl Auction for AuctionDetails { | |
| fn commit<T: Display>(a: T, b: T) -> Result<Vec<Vec<u8>>, HashError<'static>> { | |
| let mut hash_vector = Vec::new(); | |
| let a_hash = hash_fn(a); | |
| let b_hash = hash_fn(b); | |
| hash_vector.push(a_hash); | |
| hash_vector.push(b_hash); | |
| Ok(hash_vector) | |
| } | |
| fn open<T: Display>( | |
| input: T, | |
| commitment: Vec<u8>, | |
| ) -> Result<bool, HashError<'static>> { | |
| let input_hash = hash_fn(input); | |
| if input_hash == commitment { | |
| Ok(true) | |
| } else { | |
| Err(HashError::Error_message("Commitment hash discrepancy")) | |
| } | |
| } | |
| } | |
| fn hash_fn<T: Display>(input: T) -> Vec<u8> { | |
| let mut hasher = Sha256::new(); | |
| hasher.update(input.to_string()); | |
| let hash = hasher.finalize(); | |
| hash.to_vec() | |
| } | |
| fn main() { | |
| let mut input = String::new(); | |
| println!("Enter first bid: "); | |
| io::stdin() | |
| .read_line(&mut input) | |
| .expect("failed to read line"); | |
| let first_bid: u8 = input.trim().parse().expect("Pls enter a valid number"); | |
| input.clear(); | |
| println!("Enter second bid: "); | |
| io::stdin() | |
| .read_line(&mut input) | |
| .expect("failed to read line"); | |
| let second_bid: u8 = input.trim().parse().expect("Please enter a valid number"); | |
| let bid_hashes: Vec<Vec<u8>> = | |
| AuctionDetails::commit(first_bid, second_bid).expect("commit function failed"); | |
| let first_bid_commit = bid_hashes.clone()[0].to_vec(); | |
| let second_bid_commit = bid_hashes.clone()[1].to_vec(); | |
| let first_bid_open = AuctionDetails::open(first_bid, first_bid_commit).unwrap(); | |
| println!("First bid hash reveal: {}", first_bid_open); | |
| let second_bid_open = AuctionDetails::open(second_bid, second_bid_commit).unwrap(); | |
| println!("Second bid reveal: {}", second_bid_open); | |
| } |
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