Types bundle Substrate chains that have blocks with metadata versions below 14 don't provide enough information to decode their data. For those chains, external type definitions are required. Subsquid ...
That is why building your first blockchain has to be on the substrate as it provides flexibility and an open and extensible development environment which enables you to design and build fully ...
Substrate provides a functionality called Offchain Worker. It specifies a service (with its own WASM execution environment, outside of the runtime) that every Substrate node can opt-in and execute ...