Skip to main content

⚖️ Weights

pallet-xp does not hardcode production weights.

Instead, it follows the standard FRAME pattern:

pub trait pallet_xp::Config {
    // Via Runtime impl provide benchmarked weights
    type WeightInfo: pallet_xp::weights::WeightInfo;
}

This allows each runtime to provide pre-dispatch weights generated from its own benchmarking environment.

Different chains have different:

  • hardware
  • storage backends
  • runtime composition
  • optimization settings
  • benchmarking results

so a single weight implementation is never ideal for every deployment.

The recommended production approach is:

benchmark locally and provide your own type implementing pallet_xp::weights::WeightInfo

Default Weights​

Most runtimes begin with generated default weights as explained in Configuration.

impl pallet_xp::Config for Runtime {
    type WeightInfo = pallet_xp::weights::SubstrateWeight<Runtime>;
}

Generating Your Own Weights​

Production runtimes should generate weights using FRAME benchmarking.

1. Enable pallet-xp Benchmarking in Runtime Cargo.toml​

Open your runtime (or workspace) Cargo.toml and ensure pallet-xp is included in the runtime benchmarking feature set.

Example:

[features]
runtime-benchmarks = [
    # other pallets
    "pallet-xp/runtime-benchmarks",
]

2: Enable Runtime Benchmarking​

Before generating weights, build the runtime with benchmarking enabled.

Example:

cargo build --release --features runtime-benchmarks

This enables the benchmarking infrastructure required by FRAME and allows benchmark execution against your runtime.

After a successful build, a benchmarkable runtime WASM should be available inside:

target/release/wbuild/

3: Install frame-omni-bencher​

frame-omni-bencher is the recommended benchmarking tool for generating pallet weights.

First verify whether it is already installed:

frame-omni-bencher --version

If the command is not available, install it:

cargo install frame-omni-bencher

After installation, verify:

frame-omni-bencher --version

4: Generate pallet-xp Weights​

Use the standard FRAME benchmark command:

Example:

frame-omni-bencher v1 benchmark pallet \
  --runtime target/release/wbuild/your-runtime/your_runtime.wasm \
  --pallet pallet_xp \
  --extrinsic "*" \
  --output your-path/xp_weights.rs

5. Wiring Generated Weights Into Runtime​

After generating the file, expose the generated module through your runtime and then configure the pallet:

impl pallet_xp::Config for Runtime {
    type WeightInfo = your_mod::xp_weights::SubstrateWeight<Runtime>;
    // other associated types...
}

Now all XP extrinsics use your benchmark-generated pre-dispatch weights automatically.