From 444aafdf83730ae252fe7db0763bb40aa6809c5f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Silva?=
 <123550+andresilva@users.noreply.github.com>
Date: Thu, 27 May 2021 11:41:49 +0100
Subject: [PATCH] primitives: export the current slot number storage key
 (#3022)

---
 polkadot/Cargo.lock               | 1 +
 polkadot/primitives/Cargo.toml    | 2 ++
 polkadot/primitives/src/v1/mod.rs | 7 +++++++
 3 files changed, 10 insertions(+)

diff --git a/polkadot/Cargo.lock b/polkadot/Cargo.lock
index a1666ab791..f2fa573204 100644
--- a/polkadot/Cargo.lock
+++ b/polkadot/Cargo.lock
@@ -6271,6 +6271,7 @@ dependencies = [
  "sp-application-crypto",
  "sp-arithmetic",
  "sp-authority-discovery",
+ "sp-consensus-slots",
  "sp-core",
  "sp-inherents",
  "sp-io",
diff --git a/polkadot/primitives/Cargo.toml b/polkadot/primitives/Cargo.toml
index bd59162117..bb1d350a5e 100644
--- a/polkadot/primitives/Cargo.toml
+++ b/polkadot/primitives/Cargo.toml
@@ -10,6 +10,7 @@ parity-scale-codec = { version = "2.0.0", default-features = false, features = [
 primitives = { package = "sp-core", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 inherents = { package = "sp-inherents", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 application-crypto = { package = "sp-application-crypto", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
+sp-consensus-slots = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-keystore = { git = "https://github.com/paritytech/substrate", branch = "master", optional = true }
 sp-api = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-version = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
@@ -42,6 +43,7 @@ std = [
 	"trie/std",
 	"sp-api/std",
 	"sp-authority-discovery/std",
+	"sp-consensus-slots/std",
 	"sp-keystore",
 	"sp-std/std",
 	"sp-io/std",
diff --git a/polkadot/primitives/src/v1/mod.rs b/polkadot/primitives/src/v1/mod.rs
index dc11e25fd5..8950f689fa 100644
--- a/polkadot/primitives/src/v1/mod.rs
+++ b/polkadot/primitives/src/v1/mod.rs
@@ -57,6 +57,7 @@ pub use crate::v0::{ValidatorPair, CollatorPair};
 
 pub use sp_staking::SessionIndex;
 pub use sp_authority_discovery::AuthorityId as AuthorityDiscoveryId;
+pub use sp_consensus_slots::Slot;
 
 /// Signed data.
 mod signed;
@@ -82,6 +83,12 @@ pub mod well_known_keys {
 	//     <Hrmp as Store>::HrmpEgressChannelsIndex::prefix_hash();
 	//
 
+	/// The current slot number.
+	///
+	/// The storage entry should be accessed as a `Slot` encoded value.
+	pub const CURRENT_SLOT: &[u8] =
+		&hex!["1cb6f36e027abb2091cfb5110ab5087f06155b3cd9a8c9e5e9a23fd5dc13a5ed"];
+
 	/// The currently active host configuration.
 	///
 	/// The storage entry should be accessed as an `AbridgedHostConfiguration` encoded value.