Revert "grandpa: Use storage proofs for Grandpa authorities (#3734)" (#3983)

This reverts commit c0a1926704.

substrate/node/runtime/src/lib.rs

@@ -29,6 +29,7 @@ use node_primitives::{
 	AccountId, AccountIndex, Balance, BlockNumber, Hash, Index,
 	Moment, Signature,
 };
+use grandpa::fg_primitives;
 use client::{
 	block_builder::api::{self as block_builder_api, InherentData, CheckInherentsResult},
 	runtime_api as client_api, impl_runtime_apis
@@ -45,7 +46,7 @@ use version::RuntimeVersion;
 #[cfg(any(feature = "std", test))]
 use version::NativeVersion;
 use primitives::OpaqueMetadata;
-use grandpa::AuthorityId as GrandpaId;
+use grandpa::{AuthorityId as GrandpaId, AuthorityWeight as GrandpaWeight};
 use im_online::sr25519::{AuthorityId as ImOnlineId};
 use transaction_payment_rpc_runtime_api::RuntimeDispatchInfo;
 use contracts_rpc_runtime_api::ContractExecResult;
@@ -80,7 +81,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	// and set impl_version to equal spec_version. If only runtime
 	// implementation changes and behavior does not, then leave spec_version as
 	// is and increment impl_version.
-	spec_version: 191,
+	spec_version: 190,
 	impl_version: 191,
 	apis: RUNTIME_API_VERSIONS,
 };
@@ -610,6 +611,12 @@ impl_runtime_apis! {
 		}
 	}
 
+	impl fg_primitives::GrandpaApi<Block> for Runtime {
+		fn grandpa_authorities() -> Vec<(GrandpaId, GrandpaWeight)> {
+			Grandpa::grandpa_authorities()
+		}
+	}
+
 	impl babe_primitives::BabeApi<Block> for Runtime {
 		fn configuration() -> babe_primitives::BabeConfiguration {
 			// The choice of `c` parameter (where `1 - c` represents the