solabi/
constructor.rs

1//! Solidity ABI constructor encoding.
2
3use crate::{
4    decode::{Decode, DecodeError},
5    encode::Encode,
6    fmt::Hex,
7};
8use std::{
9    fmt::{self, Debug, Formatter},
10    marker::PhantomData,
11};
12
13/// A typed constructor encoder.
14pub struct ConstructorEncoder<B, P> {
15    /// The constructor deployment code.
16    pub code: B,
17    _marker: PhantomData<*const P>,
18}
19
20impl<B, P> ConstructorEncoder<B, P>
21where
22    B: AsRef<[u8]>,
23{
24    /// Creates a new constructor encoder from a selector.
25    pub const fn new(code: B) -> Self {
26        Self {
27            code,
28            _marker: PhantomData,
29        }
30    }
31}
32
33impl<B, P> ConstructorEncoder<B, P>
34where
35    B: AsRef<[u8]>,
36    P: Encode,
37{
38    /// Encodes a contract deployment for the specified parameters.
39    pub fn encode(&self, data: &P) -> Vec<u8> {
40        crate::encode_with_prefix(self.code.as_ref(), data)
41    }
42
43    /// Encodes a contract deployment parameters without any code.
44    pub fn encode_params(&self, data: &P) -> Vec<u8> {
45        crate::encode(data)
46    }
47}
48
49impl<B, P> ConstructorEncoder<B, P>
50where
51    B: AsRef<[u8]>,
52    P: Decode,
53{
54    /// Decodes the contract deployment parameters from the specified calldata.
55    pub fn decode(&self, data: &[u8]) -> Result<P, DecodeError> {
56        crate::decode_with_prefix(self.code.as_ref(), data)
57    }
58
59    /// Decodes the contract deployment parameters without any code.
60    pub fn decode_params(&self, data: &[u8]) -> Result<P, DecodeError> {
61        crate::decode(data)
62    }
63}
64
65impl<B, P> Debug for ConstructorEncoder<B, P>
66where
67    B: AsRef<[u8]>,
68{
69    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
70        f.debug_struct("ConstructorEncoder")
71            .field("code", &Hex(self.code.as_ref()))
72            .finish()
73    }
74}
75
76#[cfg(test)]
77mod tests {
78    use super::*;
79    use ethprim::{address, Address};
80    use hex_literal::hex;
81
82    #[test]
83    fn round_trips_deployment_encoding() {
84        let code = hex!(
85            "60a060405234801561001057600080fd5b506040516101083803806101088339
86             8101604081905261002f91610040565b6001600160a01b031660805261007056
87             5b60006020828403121561005257600080fd5b81516001600160a01b03811681
88             1461006957600080fd5b9392505050565b608051608061008860003960006006
89             015260806000f3fe60806040527f000000000000000000000000000000000000
90             00000000000000000000000000003660008037600080366000845af43d600080
91             3e80600181146045573d6000fd5b3d6000f3fea264697066735822122007589b
92             6aeb4b41bc48a82fc5939d02ccb42a23fd27c8bf5430706f182fd9a47164736f
93             6c63430008100033"
94        );
95        let proxy = ConstructorEncoder::<_, (Address,)>::new(code);
96
97        let account = address!("0x0101010101010101010101010101010101010101");
98
99        let params = hex!("0000000000000000000000000101010101010101010101010101010101010101");
100        let call = [&code[..], &params[..]].concat();
101
102        assert_eq!(proxy.encode(&(account,)), call);
103        assert_eq!(proxy.encode_params(&(account,)), params);
104        assert_eq!(proxy.decode(&call).unwrap(), (account,));
105        assert_eq!(proxy.decode_params(&params).unwrap(), (account,));
106    }
107}
solabi/constructor.rs

solabi/
constructor.rs
