starknet_api 0.11.0

Starknet Rust types related to computation and execution.
Documentation 
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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93

use assert_matches::assert_matches;

use crate::hash::{pedersen_hash, pedersen_hash_array, StarkFelt};
use crate::transaction::Fee;
use crate::{stark_felt, StarknetApiError};

#[test]
fn pedersen_hash_correctness() {
    // Test vectors from https://github.com/starkware-libs/crypto-cpp/blob/master/src/starkware/crypto/pedersen_hash_test.cc
    let a = stark_felt!("0x03d937c035c878245caf64531a5756109c53068da139362728feb561405371cb");
    let b = stark_felt!("0x0208a0a10250e382e1e4bbe2880906c2791bf6275695e02fbbc6aeff9cd8b31a");
    let expected =
        stark_felt!("0x030e480bed5fe53fa909cc0f8c4d99b8f9f2c016be4c41e13a4848797979c662");
    assert_eq!(pedersen_hash(&a, &b), expected);
}

#[test]
fn pedersen_hash_array_correctness() {
    let a = stark_felt!("0xaa");
    let b = stark_felt!("0xbb");
    let c = stark_felt!("0xcc");
    let expected = pedersen_hash(
        &pedersen_hash(&pedersen_hash(&pedersen_hash(&stark_felt!("0x0"), &a), &b), &c),
        &stark_felt!("0x3"),
    );
    assert_eq!(pedersen_hash_array(&[a, b, c]), expected);
}

#[test]
fn hash_macro() {
    assert_eq!(
        stark_felt!("0x123"),
        StarkFelt::new([
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
            0, 0x1, 0x23
        ])
        .unwrap()
    );
}

#[test]
fn hash_json_serde() {
    let hash = stark_felt!("0x123");
    assert_eq!(hash, serde_json::from_str(&serde_json::to_string(&hash).unwrap()).unwrap());
}

#[test]
fn hash_serde() {
    fn enc_len(n_nibbles: usize) -> usize {
        match n_nibbles {
            0..=27 => n_nibbles / 2 + 1,
            28..=33 => 17,
            _ => 32,
        }
    }

    // 64 nibbles are invalid.
    for n_nibbles in 0..64 {
        let mut bytes = [0u8; 32];
        // Set all nibbles to 0xf.
        for i in 0..n_nibbles {
            bytes[31 - (i >> 1)] |= 15 << (4 * (i & 1));
        }
        let h = StarkFelt::new(bytes).unwrap();
        let mut res = Vec::new();
        assert!(h.serialize(&mut res).is_ok());
        assert_eq!(res.len(), enc_len(n_nibbles));
        let mut reader = &res[..];
        let d = StarkFelt::deserialize(&mut reader).unwrap();
        assert_eq!(bytes, d.0);
    }
}

#[test]
fn fee_to_starkfelt() {
    let fee = Fee(u128::MAX);
    assert_eq!(format!("{}", StarkFelt::from(fee)), format!("{:#066x}", fee.0));
}

#[test]
fn felt_to_u64_and_back() {
    // Positive flow.
    let value = u64::MAX;
    let felt: StarkFelt = value.into();
    let new_value: u64 = felt.try_into().unwrap();
    assert_eq!(value, new_value);

    // Negative flow.
    let value: u128 = u128::from(u64::MAX) + 1;
    let another_felt: StarkFelt = value.into();
    let err = u64::try_from(another_felt).unwrap_err();
    assert_matches!(err, StarknetApiError::OutOfRange { .. });
}