Rococo, the place for parachain testing!
Rococo is a testnet built for parachains. Rococo utilizes Cumulus and XCMP (Cross-Chain Message Passing) to send transfers and messages between parachains and the Relay Chain. Every message is sent to the Relay Chain, then from the Relay Chain to the desired parachain.
Rococo currently runs Rocmint (Statemint on Rococo) and Canvas as well as several community parachains. Rococo also has a working Substrate<>Substrate bridge to Wococo Network, and a first iteration of Beefy implementation.
ROC are available in the Rococo Faucet channel on Matrix. To receive ROC tokens, use the command:
If you have a parachain already on Kusama and/or Polkadot, you will be entitled for a long term lease. If this is the case, you need to directly Open a Request with the following information: paraID of your Kusama parachain, WASM and Genesis of your parachain following the same paraID that you have on Kusama.
Reserve para ID
# Extrinsic to be called on chain Registrar.reserve()
Build parachain using para ID
# You will need to generate a chainspec with the correct paraID from the previous step # Assumes that `rococo-local` is in `node/chan_spec.rs` as the relay you registered with ./target/release/parachain-collator build-spec --disable-default-bootnode > rococo-local-parachain-plain.json
Run and sync collator
#Rococo’s chainspec can be found here: https://paritytech.github.io/chainspecs/ ./target/release/parachain-collator \ --[your authority] \ --collator \ --force-authoring \ --[your chainspec] \ --base-path /tmp/parachain/alice \ --port 40333 \ --ws-port 8844 \ -- \ --execution wasm \ --chain <relay chain raw chain spec> \ --port 30343 \ --ws-port 9977
Register Wasm and chain spec
#Obtain Wasm runtime validation function ./target/release/parachain-collator export-genesis-wasm --chain [your_chainspec] > [your_wasm_file_name] #Generate a parachain genesis state ./target/release/parachain-collator export-genesis-state --chain [your_chainspect]> [your_genesis_file_name] # Extrinsic to be called on chain Registrar.register(paraID, genesisHead, validationCode)
Now that you have generated and registered your parachain on Rococo, you can Open a Request for it to be upgraded!
Explore additional ecosystem resources.
- Connect other chains tutorials — Learn how to connect your chain to others
- Implementer's Guide — The Polkadot Parachain Host Implementer's Guide.
- Rococo UI — Access the Rococo UI at Rococo Polkadot-JS Apps.
- Rococo onboarding request issue — Submit your issue related to your slot request on Rococo
Access technical support from across the community.
Parachain Technical matrix chat channel — Reach out!