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use ethabi;
use hex;
use secp256k1;
use std::{error, fmt};
#[derive(Debug)]
pub enum Error {
InvalidABI(String),
InvalidABIToken(ethabi::token::Error),
InvalidLength(usize),
InvalidHexLength(String),
UnexpectedHexEncoding(hex::FromHexError),
EcdsaCrypto(secp256k1::Error),
}
impl From<ethabi::Error> for Error {
fn from(err: ethabi::Error) -> Self {
Error::InvalidABI(format!("Invalid ABI {:?}", err))
}
}
impl From<ethabi::spec::Error> for Error {
fn from(err: ethabi::spec::Error) -> Self {
Error::InvalidABI(format!("Invalid ABI Spec {:?}", err))
}
}
impl From<ethabi::token::Error> for Error {
fn from(err: ethabi::token::Error) -> Self {
Error::InvalidABIToken(err)
}
}
impl From<ethabi::spec::param_type::Error> for Error {
fn from(err: ethabi::spec::param_type::Error) -> Self {
Error::InvalidABI(format!("Invalid ABI Param {:?}", err))
}
}
impl From<hex::FromHexError> for Error {
fn from(err: hex::FromHexError) -> Self {
Error::UnexpectedHexEncoding(err)
}
}
impl From<secp256k1::Error> for Error {
fn from(err: secp256k1::Error) -> Self {
Error::EcdsaCrypto(err)
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Error::InvalidABI(ref str) => write!(f, "Invalid ABI: {}", str),
Error::InvalidABIToken(ref err) => write!(f, "Invalid ABI Token: {:?}", err),
Error::InvalidLength(len) => write!(f, "Invalid length: {}", len),
Error::InvalidHexLength(ref str) => write!(f, "Invalid hex data length: {}", str),
Error::UnexpectedHexEncoding(ref err) => {
write!(f, "Unexpected hexadecimal encoding: {}", err)
}
Error::EcdsaCrypto(ref err) => write!(f, "ECDSA crypto error: {}", err),
}
}
}
impl error::Error for Error {
fn description(&self) -> &str {
"Core error"
}
fn cause(&self) -> Option<&error::Error> {
match *self {
Error::UnexpectedHexEncoding(ref err) => Some(err),
Error::EcdsaCrypto(ref err) => Some(err),
_ => None,
}
}
}