tylerztl/ink-log

Ink-log

Ink-log provides pretty log printing for Ink! smart contract，it's implmented by ChainExtension.

[WIP]

Usage

1. Contract Pallet In Substrate Runtime

dependencies

Add this to your Cargo.toml:

runtime-log = { version = "0.1", git = "https://github.com/patractlabs/ink-log", default-features = false }

[features]
std = [
    "runtime-log/std",
]

example

1. If you already have one CustomExt, use runtime_log::logger_ext! to add to your CustomExt.

pub struct CustomExt;

impl ChainExtension for CustomExt {
	fn call<E: Ext>(func_id: u32, env: Environment<E, InitState>) -> Result<RetVal, DispatchError>
	where
		<E::T as SysConfig>::AccountId: UncheckedFrom<<E::T as SysConfig>::Hash> + AsRef<[u8]>,
	{
		// TODO add other libs
        runtime_log::logger_ext!(func_id, env);

		Ok(RetVal::Converging(0))
	}

	fn enabled() -> bool {
		true
	}
}

2. If you don't have any CustomExt, use runtime_log::LoggerExt to set ChainExtension.

impl pallet_contracts::Config for Runtime {
    // ...... 
    type ChainExtension = runtime_log::LoggerExt;
}

2. Ink! contract

dependencies

Add this to your contratc Cargo.toml:

ink_log = { version = "0.1", git = "https://github.com/patractlabs/ink-log", default-features = false, features = ["ink-log-chain-extensions"] }

[features]
std = [
    "ink_log/std",
]

Notes: must add feature ink-log-chain-extensions feature, only when the feature is available, the ink-log functions is effective.

example

Use like rust log macro

ink_log::info!(target: "flipper-contract", "latest value is: {}", self.value);

ink_log::debug!("latest value is: {}", self.value);

Output:

2020-12-28 17:44:30.274   INFO tokio-runtime-worker flipper-contract:/paritytech/ink/examples/flipper/lib.rs:42:❤️  latest value is: false