solid_core/
function.rs

1use crate::{
2    decode::Decode,
3    encode::Encode,
4    into_type::IntoType,
5    Error,
6};
7use std::{
8    borrow::Cow,
9    convert::{
10        TryFrom,
11        TryInto,
12    },
13};
14
15/// Simple wrapper for the Solidity type `function`
16pub struct Function(pub [u8; 32]);
17
18impl TryFrom<&str> for Function {
19    type Error = Error;
20
21    fn try_from(value: &str) -> Result<Function, Self::Error> {
22        // Remove the `0x` prefix if the length suggests that.
23        let s = match value.len() {
24            48 => value,
25            50 => value.split_at(2).1,
26            _ => value,
27        };
28
29        let slice = hex::decode(&s)?;
30        let slice: [u8; 24] = slice.as_slice().try_into()?;
31        let mut buf = [0u8; 32];
32        buf[0..24].copy_from_slice(&slice);
33        Ok(Function(buf))
34    }
35}
36
37impl TryFrom<&[u8]> for Function {
38    type Error = Error;
39
40    fn try_from(value: &[u8]) -> Result<Function, Self::Error> {
41        let slice: [u8; 24] = value.try_into()?;
42        let mut buf = [0u8; 32];
43        buf[0..24].copy_from_slice(&slice);
44        Ok(Function(buf))
45    }
46}
47
48impl TryFrom<&Vec<u8>> for Function {
49    type Error = Error;
50
51    fn try_from(value: &Vec<u8>) -> Result<Function, Self::Error> {
52        let slice: [u8; 24] = value.as_slice().try_into()?;
53        let mut buf = [0u8; 32];
54        buf[0..24].copy_from_slice(&slice);
55        Ok(Function(buf))
56    }
57}
58
59impl TryFrom<Vec<u8>> for Function {
60    type Error = Error;
61
62    fn try_from(value: Vec<u8>) -> Result<Function, Self::Error> {
63        let slice: [u8; 24] = value.as_slice().try_into()?;
64        let mut buf = [0u8; 32];
65        buf[0..24].copy_from_slice(&slice);
66        Ok(Function(buf))
67    }
68}
69
70impl Encode for Function {
71    fn encode(&self) -> Vec<u8> {
72        self.0.to_vec()
73    }
74}
75
76impl<'a> Decode<'a> for Function {
77    fn decode(buf: &'a [u8]) -> Self {
78        Function(buf[0..32].try_into().unwrap())
79    }
80}
81
82impl IntoType for Function {
83    fn into_type() -> Cow<'static, str> {
84        Cow::Borrowed("function")
85    }
86}
solid_core/function.rs

solid_core/
function.rs
