I know the default block interval in a substrate-based chain is 6s.
My question is whether it can be customized or not.
If could, how can I do it? It must be set before the chain start, or you can dynamically change it over the node running.
1 Answers
In the Node Template that value is set here and is customizable https://github.com/substrate-developer-hub/substrate-node-template/blob/v2.0.0/runtime/src/lib.rs#L104. You should be able to update this value for a running chain by way of Substrate's forkless runtime upgrade capabilities, which you can learn more about here https://substrate.dev/docs/en/knowledgebase/advanced/executor#runtime-upgrades and here https://substrate.dev/docs/en/knowledgebase/runtime/upgrades.
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