git.delta.rocks / unique-network / refs/commits / 5262156db57a

8	string::{String, ToString},8	string::{String, ToString},
9	vec::Vec,9	vec::Vec,
10};10};
11use evm_core::ExitError;
11use primitive_types::{H160, U256};12use primitive_types::{H160, U256};
1213
13use crate::types::string;14use crate::{execution::Error, types::string};
15use crate::execution::Result;
1416
15const ABI_ALIGNMENT: usize = 32;17const ABI_ALIGNMENT: usize = 32;
16
17pub type Result<T> = core::result::Result<T, &'static str>;
1818
19#[derive(Clone)]19#[derive(Clone)]
20pub struct AbiReader<'i> {20pub struct AbiReader<'i> {
27	}27	}
28	pub fn new_call(buf: &'i [u8]) -> Result<(u32, Self)> {28	pub fn new_call(buf: &'i [u8]) -> Result<(u32, Self)> {
29		if buf.len() < 4 {29		if buf.len() < 4 {
30			return Err("missing method id");30			return Err(Error::Error(ExitError::OutOfOffset));
31		}31		}
32		let mut method_id = [0; 4];32		let mut method_id = [0; 4];
33		method_id.copy_from_slice(&buf[0..4]);33		method_id.copy_from_slice(&buf[0..4]);
3737
38	fn read_padleft<const S: usize>(&mut self) -> Result<[u8; S]> {38	fn read_padleft<const S: usize>(&mut self) -> Result<[u8; S]> {
39		if self.buf.len() - self.offset < 32 {39		if self.buf.len() - self.offset < 32 {
40			return Err("missing padding");40			return Err(Error::Error(ExitError::OutOfOffset));
41		}41		}
42		let mut block = [0; S];42		let mut block = [0; S];
43		// Verify padding is empty43		// Verify padding is empty
44		if !self.buf[self.offset..self.offset + ABI_ALIGNMENT - S]44		if !self.buf[self.offset..self.offset + ABI_ALIGNMENT - S]
45			.iter()45			.iter()
46			.all(|&v| v == 0)46			.all(|&v| v == 0)
47		{47		{
48			return Err("non zero padding (wrong types?)");48			return Err(Error::Error(ExitError::InvalidRange));
49		}49		}
50		block.copy_from_slice(50		block.copy_from_slice(
51			&self.buf[self.offset + ABI_ALIGNMENT - S..self.offset + ABI_ALIGNMENT],51			&self.buf[self.offset + ABI_ALIGNMENT - S..self.offset + ABI_ALIGNMENT],
63		match data[0] {63		match data[0] {
64			0 => Ok(false),64			0 => Ok(false),
65			1 => Ok(true),65			1 => Ok(true),
66			_ => Err("wrong bool value"),66			_ => Err(Error::Error(ExitError::InvalidRange)),
67		}67		}
68	}68	}
6969
75		let mut subresult = self.subresult()?;75		let mut subresult = self.subresult()?;
76		let length = subresult.read_usize()?;76		let length = subresult.read_usize()?;
77		if subresult.buf.len() <= subresult.offset + length {77		if subresult.buf.len() <= subresult.offset + length {
78			return Err("bytes out of bounds");78			return Err(Error::Error(ExitError::OutOfOffset));
79		}79		}
80		Ok(subresult.buf[subresult.offset..subresult.offset + length].into())80		Ok(subresult.buf[subresult.offset..subresult.offset + length].into())
81	}81	}