foundry_config/
invariant.rs

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1//! Configuration for invariant testing
2
3use crate::fuzz::{FuzzCorpusConfig, FuzzDictionaryConfig};
4use serde::{Deserialize, Serialize};
5use std::path::PathBuf;
6
7/// Contains for invariant testing
8#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
9pub struct InvariantConfig {
10    /// The number of runs that must execute for each invariant test group.
11    pub runs: u32,
12    /// The number of calls executed to attempt to break invariants in one run.
13    pub depth: u32,
14    /// Fails the invariant fuzzing if a revert occurs
15    pub fail_on_revert: bool,
16    /// Allows overriding an unsafe external call when running invariant tests. eg. reentrancy
17    /// checks
18    pub call_override: bool,
19    /// The fuzz dictionary configuration
20    #[serde(flatten)]
21    pub dictionary: FuzzDictionaryConfig,
22    /// The maximum number of attempts to shrink the sequence
23    pub shrink_run_limit: u32,
24    /// The maximum number of rejects via `vm.assume` which can be encountered during a single
25    /// invariant run.
26    pub max_assume_rejects: u32,
27    /// Number of runs to execute and include in the gas report.
28    pub gas_report_samples: u32,
29    /// The fuzz corpus configuration.
30    #[serde(flatten)]
31    pub corpus: FuzzCorpusConfig,
32    /// Path where invariant failures are recorded and replayed.
33    pub failure_persist_dir: Option<PathBuf>,
34    /// Whether to collect and display fuzzed selectors metrics.
35    pub show_metrics: bool,
36    /// Optional timeout (in seconds) for each invariant test.
37    pub timeout: Option<u32>,
38    /// Display counterexample as solidity calls.
39    pub show_solidity: bool,
40}
41
42impl Default for InvariantConfig {
43    fn default() -> Self {
44        Self {
45            runs: 256,
46            depth: 500,
47            fail_on_revert: false,
48            call_override: false,
49            dictionary: FuzzDictionaryConfig { dictionary_weight: 80, ..Default::default() },
50            shrink_run_limit: 5000,
51            max_assume_rejects: 65536,
52            gas_report_samples: 256,
53            corpus: FuzzCorpusConfig::default(),
54            failure_persist_dir: None,
55            show_metrics: true,
56            timeout: None,
57            show_solidity: false,
58        }
59    }
60}
61
62impl InvariantConfig {
63    /// Creates invariant configuration to write failures in `{PROJECT_ROOT}/cache/fuzz` dir.
64    pub fn new(cache_dir: PathBuf) -> Self {
65        Self { failure_persist_dir: Some(cache_dir), ..Default::default() }
66    }
67}
foundry_config/invariant.rs

foundry_config/
invariant.rs
