feat: update validator reward calculation

packages/contracts/contracts/L1/ValidatorManager.sol

@@ -577,9 +577,9 @@ contract ValidatorManager is ISemver, IValidatorManager {
  *
  * @param validator Address of the validator.
  *
- * @return The amount of base reward.
+ * @return The amount of base reward, excluding base reward for the validator.
  * @return The amount of boosted reward.
- * @return The amount of validator reward.
+ * @return The amount of reward from commission and base reward for the validator.
  */
  function _calculateReward(address validator) internal view returns (uint128, uint128, uint128) {
  uint128 commissionRate = _validatorInfo[validator].commissionRate;
@@ -588,10 +588,6 @@ contract ValidatorManager is ISemver, IValidatorManager {
  uint128 validatorReward;
 
  unchecked {
- validatorReward = (BASE_REWARD + boostedReward).mulDiv(
- commissionRate,
- COMMISSION_RATE_DENOM
- );
  baseReward = BASE_REWARD.mulDiv(
  COMMISSION_RATE_DENOM - commissionRate,
  COMMISSION_RATE_DENOM
@@ -600,6 +596,15 @@ contract ValidatorManager is ISemver, IValidatorManager {
  COMMISSION_RATE_DENOM - commissionRate,
  COMMISSION_RATE_DENOM
  );
+
+ uint128 validatorKro = ASSET_MANAGER.totalValidatorKro(validator);
+ uint128 totalKro = ASSET_MANAGER.totalKroAssets(validator);
+ uint128 validatorBaseReward = baseReward.mulDiv(validatorKro, totalKro + validatorKro);
+ // Exclude the base reward for the validator from total base reward given to KRO delegators.
+ baseReward -= validatorBaseReward;
+ validatorReward =
+ (BASE_REWARD + boostedReward).mulDiv(commissionRate, COMMISSION_RATE_DENOM) +
+ validatorBaseReward;
  }
 
  return (baseReward, boostedReward, validatorReward);