Pendulum Chain

Pendulum chain by SatoshiPay. More information about Pendulum can be found here.

How to Run Tests

cargo test

How to Build

To build the project, execute

cargo build --release --features metadata-hash

A successful build will create a binary under ./target/release/pendulum-node.

How to Generate Chain Spec

There are 4 different runtimes currently in the repo; amplitude for the Amplitude parachain, foucoco for the Foucoco testnet (running on Rococo), pendulum for the Pendulum parachain and development for the local development. Any of these runtimes are used depending on the config. The config is created by generating the chain spec:

./target/release/pendulum-node build-spec --disable-default-bootnode > local-parachain-plain.json

To create the amplitude spec, the --chain must be provided (similar for pendulum and foucoco):

./target/release/pendulum-node build-spec --chain amplitude --disable-default-bootnode > local-parachain-plain.json

For the raw chain spec, just add the option --raw and the --chain should be the one you just generated:

./target/release/pendulum-node build-spec --chain local-parachain-plain.json --raw --disable-default-bootnode > local-parachain-raw.json

How to Generate Wasm:

./target/release/pendulum-node export-genesis-wasm --chain local-parachain-raw.json > para-2000-wasm

How to Generate Genesis State:

./target/release/pendulum-node export-genesis-state --chain local-parachain-raw.json > para-2000-genesis

Note: The amplitude chain specs, the wasm and the genesis state are already available in the res folder.

How to Run:

To run the collator, execute:

./target/release/pendulum-node
--collator \
--allow-private-ipv4 \
--unsafe-ws-external \
--rpc-cors all \
--rpc-external \
--rpc-methods Unsafe \
--name <ASSIGN_A_NAME> \
--ws-port <P_WS_PORT> --port <P_PORT> --rpc-port <P_RPC_PORT> \
--chain <P_SPEC_RAW.json> \
-- \
--port <R_PORT>\
--chain <R_SPEC_RAW.json> \
--sync fast --pruning archive

where:

Parachain	Relay Chain	Description
ASSIGN_A_NAME		assigning a name to the chain
P_WS_PORT		listening port for WebSocket connections
P_PORT	R_PORT	port for peer-to-peer communication
P_RPC_PORT		port for remote procedure calls
P_SPEC_RAW.json	R_SPEC_RAW.json	raw json file of the chain spec

An example for Amplitude will look like this:

./target/release/pendulum-node
--collator \
--allow-private-ipv4 \
--unsafe-ws-external \
--rpc-cors all \
--rpc-external \
--rpc-methods Unsafe \
--name amplitude-collator-1 \
--ws-port 9945 --port 30335 --rpc-port 9935 \
--chain res/amplitude-spec-raw.json \
-- \
--port 30334 \
--chain kusama.json \
--sync fast --pruning archive

You can find the kusama.json here.

For local testing, you can replace --name with predefined keys like --alice or --bob. You also need to specify the --bootnode. Here's an example:

./target/release/pendulum-node \
--alice \
--rpc-cors=all \
--collator \
--force-authoring \
--chain local-parachain-raw.json \
--base-path /tmp/parachain/alice \
--port 40333 \
--ws-port 8844 \
--enable-offchain-indexing TRUE \
-- \
--chain rococo-custom-2-raw.json \
--bootnodes /ip4/127.0.0.1/tcp/30333/p2p/<ALICE_NODE_ID> \
--port 30343 \
--ws-port 9977

where ALICE_NODE_ID is the peer id of Alice. You can find the rococo-custom-2-raw.json here.

There are prerequisites in running the collator with a local relay chain. Refer to how to run Pendulum locally.

How to benchmark runtime pallets

Build the node with the production profile and the runtime-benchmarks feature enabled.

cargo build --profile=production --features runtime-benchmarks --package pendulum-node

Run the benchmarks of a registered pallet. The pallet has to be added to the list of defined benchmarks that you can find in the benches module of each runtimes lib.rs file.

Pendulum

./target/production/pendulum-node benchmark pallet \
    --chain pendulum \
    --wasm-execution=compiled \
    --pallet "*" \
    --extrinsic "*" \
    --steps 50 \
    --repeat 20 \
    --output runtime/pendulum/src/weights/ \
    --template .maintain/frame-weight-template.hbs

Amplitude

./target/production/pendulum-node benchmark pallet \
    --chain amplitude \
    --wasm-execution=compiled \
    --pallet "*" \
    --extrinsic "*" \
    --steps 50 \
    --repeat 20 \
    --output runtime/amplitude/src/weights/ \
    --template .maintain/frame-weight-template.hbs

Foucoco

./target/production/pendulum-node benchmark pallet \
    --chain foucoco \
    --wasm-execution=compiled \
    --pallet "*" \
    --extrinsic "*" \
    --steps 50 \
    --repeat 20 \
    --output runtime/foucoco/src/weights/ \
    --template .maintain/frame-weight-template.hbs

How to run in standalone mode

For testing purposes, it is useful to run an instance of the chain locally with the same runtime as the live chain, but using the instant-seal consensus mechanism. This means that upon every successful extrinsic, a new block will be produced instantly.

Currently we only support the use of the foucoco runtime to run the chain in this standalone mode.

To run:

cargo run -p pendulum-node -- --chain {x}-spec-raw.json --instant-seal

Most other flags are irrelevant when instant-seal is used, and should not be passed, but it is still possible to use the port definition flags to change the default ports used.

Run with a specific genesis config

The previous command assumes there exist already a ...spec-raw.json which defines the genesis config. The process of creating this file is the same as the one described above in section How to Generate Genesis State

To run with the default standalone genesis config defined in node/chain_spec.rs (foucoco_standalone_config() function) use:

cargo run -p pendulum-node -- --chain res/foucoco-standalone-spec-raw.json --instant-seal

or simply:

cargo run -p pendulum-node -- --chain foucoco-standalone --instant-seal