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I'm trying to create a layer 2 blockchain. In this blockchain, I do some computing to add to a transaction. Basically, I want to add a custom type to store in the block alongside Extrinsics.

Are there any examples of this? Or, where should I take a look at the source code?

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  • You are asking you add something additional to your block header? Or what does "along side Extrinsics" mean?
    – Shawn Tabrizi ♦
    Apr 28, 2022 at 8:25
  • "Extrinsic" just means "external data". It does not necessarily need to be signed or (immediately) actionable, so you probably just want to define a new kind of extrinsic? Did you look at the Inherents/InherentData API? See pallet_timestamp for a simple example.
    – Gav
    Apr 28, 2022 at 8:53
  • @ShawnTabrizi Yes, I want to add additional data to the block header. Thanks, @ Gav, I'll take a look.
    – Burak
    Apr 28, 2022 at 17:39

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