web3_etz/types/
bytes.rs

1use rustc_hex::{FromHex, ToHex};
2use serde::de::{Error, Visitor};
3use serde::{Deserialize, Deserializer, Serialize, Serializer};
4use std::fmt;
5
6/// Raw bytes wrapper
7#[derive(Clone, Debug, Default, PartialEq, Eq, Hash)]
8pub struct Bytes(pub Vec<u8>);
9
10impl<T: Into<Vec<u8>>> From<T> for Bytes {
11    fn from(data: T) -> Self {
12        Bytes(data.into())
13    }
14}
15
16impl Serialize for Bytes {
17    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
18    where
19        S: Serializer,
20    {
21        let mut serialized = "0x".to_owned();
22        serialized.push_str(self.0.to_hex::<String>().as_ref());
23        serializer.serialize_str(serialized.as_ref())
24    }
25}
26
27impl<'a> Deserialize<'a> for Bytes {
28    fn deserialize<D>(deserializer: D) -> Result<Bytes, D::Error>
29    where
30        D: Deserializer<'a>,
31    {
32        deserializer.deserialize_identifier(BytesVisitor)
33    }
34}
35
36struct BytesVisitor;
37
38impl<'a> Visitor<'a> for BytesVisitor {
39    type Value = Bytes;
40
41    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
42        write!(formatter, "a 0x-prefixed hex-encoded vector of bytes")
43    }
44
45    fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
46    where
47        E: Error,
48    {
49        if value.len() >= 2 && &value[0..2] == "0x" && value.len() & 1 == 0 {
50            Ok(Bytes(
51                FromHex::from_hex(&value[2..]).map_err(|_| Error::custom("invalid hex"))?,
52            ))
53        } else {
54            Err(Error::custom("invalid format"))
55        }
56    }
57
58    fn visit_string<E>(self, value: String) -> Result<Self::Value, E>
59    where
60        E: Error,
61    {
62        self.visit_str(value.as_ref())
63    }
64}
web3_etz/types/bytes.rs

web3_etz/types/
bytes.rs
