Runtime Integration

Phink provides developers with the flexibility to customize their fuzzing environment through a simple interface. By editing contract/custom/custom.rs and contract/custom/preferences.rs, developers can tailor the runtime storage and contract initialization processes to suit their testing needs. Having a clone of Phink is required, in order to modify the source code.

Custom Runtime Storage

Phink allows developers to tailor the runtime environment by customizing the storage configuration. This enables the creation of versatile and realistic testing scenarios.

Example

impl DevelopperPreferences for Preferences {
    fn runtime_storage() -> Storage {
        let storage = RuntimeGenesisConfig {
            balances: BalancesConfig {
                balances: (0..u8::MAX) // Allocates substantial balance to accounts
                    .map(|i| [i; 32].into())
                    .collect::<Vec<_>>()
                    .iter()
                    .cloned()
                    .map(|k| (k, 10000000000000000000 * 2))
                    .collect(),
            },
            ..Default::default()
        }
            .build_storage()
            .unwrap();
        storage
    }
}

Customization Points

runtime_storage: This function is your gateway to defining any mocks or RuntimeGenesisConfig settings needed for your testing environment. Whether it’s allocating funds, initializing storage items, or setting up custom storage, you can adjust these configurations to mirror your deployment scenarios closely. This flexibility allows you to test how your ink! smart contract behave in various simulated network states.

Contract Initialization

The on_contract_initialize function can be adapted to execute additional initialization logic, such as uploading supplementary contracts or handling dependencies.

Usage Example

fn on_contract_initialize() -> anyhow::Result<()> {
    Contracts::bare_upload_code(
        AccountId32::new([1; 32]),
        fs::read("adder.wasm")?,
        None,
        Determinism::Enforced,
    );
    Ok(())
}

Customization Points

on_contract_initialize: Use this function to automate contract uploads, configure dependencies, or perform any setup necessary before testing.

Custom Runtime Parameters

Phink provides default runtime configurations, but developers can provide their own runtime parameters in contract/runtime.rs. This can be particularly useful if you wish to connect your fuzzing environment to your own Substrate runtime, so Phink can be adapted to work with your specific runtime. You can edit the runtime configure here.

Example: Custom Runtime Configuration

For instance, users could customize the pallet_timestamp runtime parameters:

impl pallet_timestamp::Config for Runtime {
    type MinimumPeriod = CustomMinimumPeriod;
    ...
}

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