stratus/eth/primitives/
nonce.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
use anyhow::anyhow;
use display_json::DebugAsJson;
use ethereum_types::U256;
use ethereum_types::U64;
use fake::Dummy;
use fake::Faker;

use crate::gen_newtype_from;
use crate::gen_newtype_try_from;

#[derive(DebugAsJson, derive_more::Display, Clone, Copy, Default, PartialEq, Eq, serde::Serialize, serde::Deserialize)]
pub struct Nonce(U64);

impl Nonce {
    pub const ZERO: Nonce = Nonce(U64::zero());

    /// Returns the next nonce.
    pub fn next_nonce(&self) -> Self {
        Self(self.0 + 1)
    }
}

impl Dummy<Faker> for Nonce {
    fn dummy_with_rng<R: rand_core::RngCore + ?Sized>(_: &Faker, rng: &mut R) -> Self {
        rng.next_u64().into()
    }
}

// -----------------------------------------------------------------------------
// Conversions: Other -> Self
// -----------------------------------------------------------------------------
gen_newtype_from!(self = Nonce, other = u8, u16, u32, u64);
gen_newtype_try_from!(self = Nonce, other = i32);

impl TryFrom<U256> for Nonce {
    type Error = anyhow::Error;

    fn try_from(value: U256) -> Result<Self, Self::Error> {
        Ok(Nonce(u64::try_from(value).map_err(|err| anyhow!(err))?.into()))
    }
}

// -----------------------------------------------------------------------------
// Conversions: Self -> Other
// -----------------------------------------------------------------------------
impl From<Nonce> for u64 {
    fn from(value: Nonce) -> Self {
        value.0.as_u64()
    }
}

impl From<Nonce> for U256 {
    fn from(value: Nonce) -> Self {
        U256::from(value.0.as_u64())
    }
}