feat: use rust_util

__crypto/simple_contract/src/util.rs

@@ -1,32 +1,11 @@
 use rand::rngs::OsRng;
+use rust_util::XResult;
 use serde::{Deserialize, Serialize};
 use secp256k1::{Secp256k1, SecretKey, key::PublicKey};
 use sha2::Sha256;
 use ripemd160::Ripemd160;
 use digest::{ Input, FixedOutput };
-use std::{fmt::Display, str::FromStr};
-use std::error::Error;
-
-pub type XResult<T> = Result<T, Box<dyn Error>>;
-
-#[derive(Debug)]
-pub struct SimpleError {
-    pub message: String,
-}
-
-impl SimpleError {
-    pub fn new(message: String) -> Self {
-        Self { message }
-    }
-}
-
-impl Display for SimpleError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "SimpleErorr, message: {}", self.message)
-    }
-}
-
-impl Error for SimpleError {}
+use std::str::FromStr;
 
 #[derive(Debug, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]