Directory Restructure (#1163)

* Move tests -> testing

* Directory restructure

* Update Cargo.toml during restructure

* Update Makefile during restructure

* Fix arbitrary path

consensus/state_processing/src/common/get_base_reward.rs

@@ -0,0 +1,24 @@
+use integer_sqrt::IntegerSquareRoot;
+use safe_arith::SafeArith;
+use types::*;
+
+/// Returns the base reward for some validator.
+///
+/// Spec v0.11.1
+pub fn get_base_reward<T: EthSpec>(
+    state: &BeaconState<T>,
+    index: usize,
+    // Should be == get_total_active_balance(state, spec)
+    total_active_balance: u64,
+    spec: &ChainSpec,
+) -> Result<u64, BeaconStateError> {
+    if total_active_balance == 0 {
+        Ok(0)
+    } else {
+        Ok(state
+            .get_effective_balance(index, spec)?
+            .safe_mul(spec.base_reward_factor)?
+            .safe_div(total_active_balance.integer_sqrt())?
+            .safe_div(spec.base_rewards_per_epoch)?)
+    }
+}