inital commit, which is clearly not initial

Signed-off-by: Uncle Stretch <uncle.stretch@ghostchain.io>

runtime/common/src/elections.rs

@@ -0,0 +1,42 @@
+#[macro_export]
+macro_rules! impl_elections_weights {
+    ($runtime:ident) => {
+        parameter_types! {
+            /// A limit for off-chain phragmen unsigned solution submission.
+            ///
+            /// We want to keep it as high as possible, but can't risk having 
+            /// it reject, so we always substract the base block execution weight.
+            pub OffchainSolutionWeightLimit: Weight = BlockWeights::get()
+                .get(DispatchClass::Normal)
+                .max_extrinsic
+                .expect("Normal extrinsic have weight limit configured by default; qed")
+                .saturating_sub($runtime::weights::BlockExecutionWeight::get());
+
+            /// A limit for off-chain phragmen unsigned solution length.
+            ///
+            /// We allow up to 90% of the block's size to be consumed by the solution.
+            pub OffchainSolutionLengthLimit: u32 = Perbill::from_rational(90u32, 100u32) *
+                *BlockLength::get()
+                .max
+                .get(DispatchClass::Normal);
+        }
+    };
+}
+
+/// The number configured here could always be more than the maximum limits of 
+/// staking pallet to ensure election snapshot will not run out of memory. For 
+/// now, we set them to smaller values since the staking is bounded and the weight
+/// pipeline takes for this single pallet.
+pub struct BenchmarkConfig;
+impl pallet_election_provider_multi_phase::BenchmarkingConfig for BenchmarkConfig {
+    const VOTERS: [u32; 2] = [1000, 2000];
+    const TARGETS: [u32; 2] = [500, 1000];
+    const ACTIVE_VOTERS: [u32; 2] = [500, 800];
+    const DESIRED_TARGETS: [u32; 2] = [200, 400];
+    const SNAPSHOT_MAXIMUM_VOTERS: u32 = 1000;
+    const MINER_MAXIMUM_VOTERS: u32 = 1000;
+    const MAXIMUM_TARGETS: u32 = 300;
+}
+
+/// The accuracy type used for genesis election provider.
+pub type OnChainAccuracy = sp_runtime::Perbill;