ethabi 2.0.1

Easy to use conversion of ethereum contract calls to bytecode.
Documentation 
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//! Creates fixed size token from bytes.

use hex::FromHex;
use super::Error;

/// Creates fixed size token from bytes.
pub trait TokenFromHex<T> {
	/// Converts bytes to token.
	fn token_from_hex(&self) -> Result<T, Error>;
}

macro_rules! impl_token_from_hex {
	($size: expr) => {
		impl TokenFromHex<[u8; $size]> for str {
			fn token_from_hex(&self) -> Result<[u8; $size], Error> {
				let mut result = [0u8; $size];
				let bytes = self.from_hex().unwrap();

				if bytes.len() != $size {
					return Err(Error::InvalidValue);
				}

				result.copy_from_slice(&bytes);
				Ok(result)
			}
		}
	}
}

impl_token_from_hex!(20);
impl_token_from_hex!(32);