Phase 1 of repo reorg (#719)

* Remove unneeded script * Rename Substrate Demo -> Substrate * Rename demo -> node * Build wasm from last rename. * Merge ed25519 into substrate-primitives * Minor tweak * Rename substrate -> core * Move substrate-runtime-support to core/runtime/support * Rename/move substrate-runtime-version * Move codec up a level * Rename substrate-codec -> parity-codec * Move environmental up a level * Move pwasm-* up to top, ready for removal * Remove requirement of s-r-support from s-r-primitives * Move core/runtime/primitives into core/runtime-primitives * Remove s-r-support dep from s-r-version * Remove dep of s-r-support from bft * Remove dep of s-r-support from node/consensus * Sever all other core deps from s-r-support * Forgot the no_std directive * Rename non-SRML modules to sr-* to avoid match clashes * Move runtime/* to srml/* * Rename substrate-runtime-* -> srml-* * Move srml to top-level
2026-06-14 07:31:08 +00:00 · 2018-09-12 11:13:31 +02:00
parent 8fe5aa4c81
commit 1e01162505
374 changed files with 2845 additions and 2902 deletions
@@ -0,0 +1,150 @@
+// Copyright 2017 Parity Technologies (UK) Ltd.
+// This file is part of Substrate.
+
+// Substrate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Substrate is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Generic implementation of a digest.
+
+use rstd::prelude::*;
+
+use codec::{Decode, Encode, Codec, Input};
+use traits::{self, Member, DigestItem as DigestItemT};
+
+#[derive(PartialEq, Eq, Clone, Encode, Decode)]
+#[cfg_attr(feature = "std", derive(Debug, Serialize, Deserialize))]
+pub struct Digest<Item> {
+	pub logs: Vec<Item>,
+}
+
+impl<Item> Default for Digest<Item> {
+	fn default() -> Self {
+		Digest { logs: Vec::new(), }
+	}
+}
+
+impl<Item> traits::Digest for Digest<Item> where
+	Item: DigestItemT + Codec
+{
+	type Item = Item;
+
+	fn logs(&self) -> &[Self::Item] {
+		&self.logs
+	}
+
+	fn push(&mut self, item: Self::Item) {
+		self.logs.push(item);
+	}
+}
+
+/// Digest item that is able to encode/decode 'system' digest items and
+/// provide opaque access to other items.
+#[derive(PartialEq, Eq, Clone)]
+#[cfg_attr(feature = "std", derive(Debug, Serialize, Deserialize))]
+pub enum DigestItem<AuthorityId> {
+	/// System digest item announcing that authorities set has been changed
+	/// in the block. Contains the new set of authorities.
+	AuthoritiesChange(Vec<AuthorityId>),
+	/// Any 'non-system' digest item, opaque to the native code.
+	Other(Vec<u8>),
+}
+
+/// A 'referencing view' for digest item. Does not own its contents. Used by
+/// final runtime implementations for encoding/decoding its log items.
+#[derive(PartialEq, Eq, Clone)]
+#[cfg_attr(feature = "std", derive(Debug))]
+pub enum DigestItemRef<'a, AuthorityId: 'a> {
+	/// Reference to `DigestItem::AuthoritiesChange`.
+	AuthoritiesChange(&'a [AuthorityId]),
+	/// Reference to `DigestItem::Other`.
+	Other(&'a Vec<u8>),
+}
+
+/// Type of the digest item. Used to gain explicit control over `DigestItem` encoding
+/// process. We need an explicit control, because final runtimes are encoding their own
+/// digest items using `DigestItemRef` type and we can't auto-derive `Decode`
+/// trait for `DigestItemRef`.
+#[repr(u32)]
+#[derive(Encode, Decode)]
+enum DigestItemType {
+	Other = 0,
+	AuthoritiesChange,
+}
+
+impl<AuthorityId> DigestItem<AuthorityId> {
+	/// Returns Some if `self` is a `DigestItem::Other`.
+	pub fn as_other(&self) -> Option<&Vec<u8>> {
+		match *self {
+			DigestItem::Other(ref v) => Some(v),
+			_ => None,
+		}
+	}
+
+	/// Returns a 'referencing view' for this digest item.
+	fn dref<'a>(&'a self) -> DigestItemRef<'a, AuthorityId> {
+		match *self {
+			DigestItem::AuthoritiesChange(ref v) => DigestItemRef::AuthoritiesChange(v),
+			DigestItem::Other(ref v) => DigestItemRef::Other(v),
+		}
+	}
+}
+
+impl<AuthorityId: Member> traits::DigestItem for DigestItem<AuthorityId> {
+	type AuthorityId = AuthorityId;
+
+	fn as_authorities_change(&self) -> Option<&[Self::AuthorityId]> {
+		match *self {
+			DigestItem::AuthoritiesChange(ref authorities) => Some(authorities),
+			_ => None,
+		}
+	}
+}
+
+impl<AuthorityId: Encode> Encode for DigestItem<AuthorityId> {
+	fn encode(&self) -> Vec<u8> {
+		self.dref().encode()
+	}
+}
+
+impl<AuthorityId: Decode> Decode for DigestItem<AuthorityId> {
+	fn decode<I: Input>(input: &mut I) -> Option<Self> {
+		let item_type: DigestItemType = Decode::decode(input)?;
+		match item_type {
+			DigestItemType::AuthoritiesChange => Some(DigestItem::AuthoritiesChange(
+				Decode::decode(input)?,
+			)),
+			DigestItemType::Other => Some(DigestItem::Other(
+				Decode::decode(input)?,
+			)),
+		}
+	}
+}
+
+impl<'a, AuthorityId: Encode> Encode for DigestItemRef<'a, AuthorityId> {
+	fn encode(&self) -> Vec<u8> {
+		let mut v = Vec::new();
+
+		match *self {
+			DigestItemRef::AuthoritiesChange(authorities) => {
+				DigestItemType::AuthoritiesChange.encode_to(&mut v);
+				authorities.encode_to(&mut v);
+			},
+			DigestItemRef::Other(val) => {
+				DigestItemType::Other.encode_to(&mut v);
+				val.encode_to(&mut v);
+			},
+		}
+
+		v
+	}
+}