Move developer-hub to polkadot-sdk-docs (#2598)

This PR is a continuation of https://github.com/paritytech/polkadot-sdk/pull/2102 and part of an initiative started here https://hackmd.io/@romanp/rJ318ZCEp What has been done: - The content under `docs/*` (with the exception of `docs/mermaid`) has been moved to `docs/contributor/` - Developer Hub has been renamed to Polkadot SDK Docs, and the crate has been renamed from `developer-hub` to `polkadot-sdk-docs` - The content under `developer-hub/*` has been moved to `docs/sdk` --- Original PR https://github.com/paritytech/polkadot-sdk/pull/2565, it has been close due to too many rebase conflicts --------- Co-authored-by: Serban Iorga <serban@parity.io> Co-authored-by: Chevdor <chevdor@users.noreply.github.com> Co-authored-by: Egor_P <egor@parity.io> Co-authored-by: Bastian Köcher <git@kchr.de>
2026-04-26 16:57:58 +00:00 · 2023-12-05 10:23:24 +01:00
parent 2f9af7873d
commit a310df263d
67 changed files with 153 additions and 154 deletions
@@ -0,0 +1,79 @@
+//! Signed extensions are, briefly, a means for different chains to extend the "basic" extrinsic
+//! format with custom data that can be checked by the runtime.
+//!
+//! # Example
+//!
+//! Defining a couple of very simple signed extensions looks like the following:
+#![doc = docify::embed!("./src/reference_docs/signed_extensions.rs", signed_extensions_example)]
+
+#[docify::export]
+pub mod signed_extensions_example {
+	use parity_scale_codec::{Decode, Encode};
+	use scale_info::TypeInfo;
+	use sp_runtime::traits::SignedExtension;
+
+	// This doesn't actually check anything, but simply allows
+	// some arbitrary `u32` to be added to the extrinsic payload
+	#[derive(Debug, Encode, Decode, Clone, Eq, PartialEq, TypeInfo)]
+	pub struct AddToPayload(pub u32);
+
+	impl SignedExtension for AddToPayload {
+		const IDENTIFIER: &'static str = "AddToPayload";
+		type AccountId = ();
+		type Call = ();
+		type AdditionalSigned = ();
+		type Pre = ();
+
+		fn additional_signed(
+			&self,
+		) -> Result<
+			Self::AdditionalSigned,
+			sp_runtime::transaction_validity::TransactionValidityError,
+		> {
+			Ok(())
+		}
+
+		fn pre_dispatch(
+			self,
+			_who: &Self::AccountId,
+			_call: &Self::Call,
+			_info: &sp_runtime::traits::DispatchInfoOf<Self::Call>,
+			_len: usize,
+		) -> Result<Self::Pre, sp_runtime::transaction_validity::TransactionValidityError> {
+			Ok(())
+		}
+	}
+
+	// This is the opposite; nothing will be added to the extrinsic payload,
+	// but the AdditionalSigned type (`1234u32`) will be added to the
+	// payload to be signed.
+	#[derive(Debug, Encode, Decode, Clone, Eq, PartialEq, TypeInfo)]
+	pub struct AddToSignaturePayload;
+
+	impl SignedExtension for AddToSignaturePayload {
+		const IDENTIFIER: &'static str = "AddToSignaturePayload";
+		type AccountId = ();
+		type Call = ();
+		type AdditionalSigned = u32;
+		type Pre = ();
+
+		fn additional_signed(
+			&self,
+		) -> Result<
+			Self::AdditionalSigned,
+			sp_runtime::transaction_validity::TransactionValidityError,
+		> {
+			Ok(1234)
+		}
+
+		fn pre_dispatch(
+			self,
+			_who: &Self::AccountId,
+			_call: &Self::Call,
+			_info: &sp_runtime::traits::DispatchInfoOf<Self::Call>,
+			_len: usize,
+		) -> Result<Self::Pre, sp_runtime::transaction_validity::TransactionValidityError> {
+			Ok(())
+		}
+	}
+}