Merge pull request #11657 from vegaprotocol/bb_auctions

fix: set the tier number in party stats tiers

datanode/service/party_stats.go

@@ -257,10 +257,12 @@ func (s *PSvc) getReferralTier(ctx context.Context, stats entities.FlattenReferr
 	if err != nil {
 		return nil, err
 	}
-	for _, bt := range current.BenefitTiers {
+	for i, bt := range current.BenefitTiers {
 		if bt.ReferralRewardFactors.InfrastructureRewardFactor == stats.RewardFactors.InfrastructureRewardFactor &&
 			bt.ReferralRewardFactors.LiquidityRewardFactor == stats.RewardFactors.LiquidityRewardFactor &&
 			bt.ReferralRewardFactors.MakerRewardFactor == stats.RewardFactors.MakerRewardFactor {
+			tierNumber := uint64(i)
+			bt.TierNumber = &tierNumber
 			return bt, nil
 		}
 	}
@@ -279,10 +281,11 @@ func (s *PSvc) getVolumeDiscountTier(ctx context.Context, stats entities.Flatten
 	if err != nil {
 		return nil, err
 	}
-	for i := len(current.BenefitTiers) - 1; i >= 0; i-- {
+	for i := uint64(len(current.BenefitTiers)) - 1; i >= uint64(0); i-- {
 		dt := current.BenefitTiers[i]
 		minV, _ := num.DecimalFromString(dt.MinimumRunningNotionalTakerVolume)
 		if vol.GreaterThanOrEqual(minV) {
+			dt.TierNumber = &i
 			return dt, nil
 		}
 	}
@@ -298,10 +301,11 @@ func (s *PSvc) getVolumeRebateTier(ctx context.Context, stats entities.FlattenVo
 	if err != nil {
 		return nil, err
 	}
-	for i := len(current.BenefitTiers) - 1; i >= 0; i-- {
+	for i := uint64(len(current.BenefitTiers)) - 1; i >= uint64(0); i-- {
 		bt := current.BenefitTiers[i]
 		minF, _ := num.DecimalFromString(bt.MinimumPartyMakerVolumeFraction)
 		if vf.GreaterThanOrEqual(minF) {
+			bt.TierNumber = &i
 			return bt, nil
 		}
 	}