diff --git a/relayer/src/ethereum_checkpoints/metrics.rs b/relayer/src/ethereum_checkpoints/metrics.rs
index e9de5177..9c28875b 100644
--- a/relayer/src/ethereum_checkpoints/metrics.rs
+++ b/relayer/src/ethereum_checkpoints/metrics.rs
@@ -3,41 +3,25 @@ use utils_prometheus::impl_metered_service;
 
 impl_metered_service! {
     pub struct Updates {
-        pub fetched_sync_update_slot: IntGauge,
-        pub total_fetched_finality_updates: IntCounter,
-        pub processed_finality_updates: IntCounter,
-        pub processed_committee_updates: IntCounter,
-        pub account_total_balance: IntGauge,
-    }
-}
-
-impl Updates {
-    pub fn new() -> Self {
-        Self::new_inner().expect("Failed to create metrics")
-    }
-
-    fn new_inner() -> prometheus::Result<Self> {
-        Ok(Self {
-            fetched_sync_update_slot: IntGauge::new(
-                "checkpoints_relayer_fetched_sync_update_slot",
-                "The slot of the last applied update",
-            )?,
-            total_fetched_finality_updates: IntCounter::new(
-                "checkpoints_relayer_total_fetched_finality_updates",
-                "Total amount of fetched finality updates",
-            )?,
-            processed_finality_updates: IntCounter::new(
-                "checkpoints_relayer_processed_finality_updates",
-                "Amount of processed finality updates",
-            )?,
-            processed_committee_updates: IntCounter::new(
-                "checkpoints_relayer_processed_committee_updates",
-                "Amount of processed committee updates",
-            )?,
-            account_total_balance: IntGauge::new(
-                "checkpoints_relayer_account_total_balance",
-                "The total balance of the account used to send messages",
-            )?,
-        })
+        pub fetched_sync_update_slot: IntGauge = IntGauge::new(
+            "checkpoints_relayer_fetched_sync_update_slot",
+            "The slot of the last applied update",
+        ),
+        pub total_fetched_finality_updates: IntCounter = IntCounter::new(
+            "checkpoints_relayer_total_fetched_finality_updates",
+            "Total amount of fetched finality updates",
+        ),
+        pub processed_finality_updates: IntCounter = IntCounter::new(
+            "checkpoints_relayer_processed_finality_updates",
+            "Amount of processed finality updates",
+        ),
+        pub processed_committee_updates: IntCounter = IntCounter::new(
+            "checkpoints_relayer_processed_committee_updates",
+            "Amount of processed committee updates",
+        ),
+        pub account_total_balance: IntGauge = IntGauge::new(
+            "checkpoints_relayer_account_total_balance",
+            "The total balance of the account used to send messages",
+        ),
     }
 }
diff --git a/relayer/src/message_relayer/common/ethereum_block_listener.rs b/relayer/src/message_relayer/common/ethereum_block_listener.rs
index f02e4d0c..cb02f8de 100644
--- a/relayer/src/message_relayer/common/ethereum_block_listener.rs
+++ b/relayer/src/message_relayer/common/ethereum_block_listener.rs
@@ -26,22 +26,10 @@ impl MeteredService for EthereumBlockListener {
 
 impl_metered_service! {
     struct Metrics {
-        latest_block: IntGauge,
-    }
-}
-
-impl Metrics {
-    fn new() -> Self {
-        Self::new_inner().expect("Failed to create metrics")
-    }
-
-    fn new_inner() -> prometheus::Result<Self> {
-        Ok(Self {
-            latest_block: IntGauge::new(
-                "ethereum_block_listener_latest_block",
-                "Latest ethereum block discovered by listener",
-            )?,
-        })
+        latest_block: IntGauge = IntGauge::new(
+            "ethereum_block_listener_latest_block",
+            "Latest ethereum block discovered by listener",
+        ),
     }
 }
 
diff --git a/relayer/src/message_relayer/common/ethereum_message_sender/era.rs b/relayer/src/message_relayer/common/ethereum_message_sender/era.rs
index 7b92fd91..c539d019 100644
--- a/relayer/src/message_relayer/common/ethereum_message_sender/era.rs
+++ b/relayer/src/message_relayer/common/ethereum_message_sender/era.rs
@@ -25,32 +25,18 @@ struct RelayMessagePendingTx {
 
 impl_metered_service! {
     pub struct Metrics {
-        total_submitted_txs: IntCounter,
-        total_failed_txs: IntCounter,
-        total_failed_txs_because_processed: IntCounter,
-    }
-}
-
-impl Metrics {
-    pub fn new() -> Self {
-        Self::new_inner().expect("Failed to create metrics")
-    }
-
-    fn new_inner() -> prometheus::Result<Self> {
-        Ok(Self {
-            total_submitted_txs: IntCounter::new(
-                "ethereum_message_sender_total_submitted_txs",
-                "Total amount of txs sent to ethereum",
-            )?,
-            total_failed_txs: IntCounter::new(
-                "ethereum_message_sender_total_failed_txs",
-                "Total amount of txs sent to ethereum and failed",
-            )?,
-            total_failed_txs_because_processed: IntCounter::new(
-                "ethereum_message_sender_total_failed_txs_because_processed",
-                "Amount of txs sent to ethereum and failed because they've already been processed",
-            )?,
-        })
+        total_submitted_txs: IntCounter = IntCounter::new(
+            "ethereum_message_sender_total_submitted_txs",
+            "Total amount of txs sent to ethereum",
+        ),
+        total_failed_txs: IntCounter = IntCounter::new(
+            "ethereum_message_sender_total_failed_txs",
+            "Total amount of txs sent to ethereum and failed",
+        ),
+        total_failed_txs_because_processed: IntCounter = IntCounter::new(
+            "ethereum_message_sender_total_failed_txs_because_processed",
+            "Amount of txs sent to ethereum and failed because they've already been processed",
+        ),
     }
 }
 
diff --git a/relayer/src/message_relayer/common/ethereum_message_sender/mod.rs b/relayer/src/message_relayer/common/ethereum_message_sender/mod.rs
index fca39c71..a0df272f 100644
--- a/relayer/src/message_relayer/common/ethereum_message_sender/mod.rs
+++ b/relayer/src/message_relayer/common/ethereum_message_sender/mod.rs
@@ -35,27 +35,14 @@ impl MeteredService for EthereumMessageSender {
 
 impl_metered_service! {
     struct Metrics {
-        pending_tx_count: IntGauge,
-        fee_payer_balance: Gauge
-    }
-}
-
-impl Metrics {
-    fn new() -> Self {
-        Self::new_inner().expect("Failed to create metrics")
-    }
-
-    fn new_inner() -> prometheus::Result<Self> {
-        Ok(Self {
-            pending_tx_count: IntGauge::new(
-                "ethereum_message_sender_pending_tx_count",
-                "Amount of txs pending finalization on ethereum",
-            )?,
-            fee_payer_balance: Gauge::new(
-                "ethereum_message_sender_fee_payer_balance",
-                "Transaction fee payer balance",
-            )?,
-        })
+        pending_tx_count: IntGauge = IntGauge::new(
+            "ethereum_message_sender_pending_tx_count",
+            "Amount of txs pending finalization on ethereum",
+        ),
+        fee_payer_balance: Gauge = Gauge::new(
+            "ethereum_message_sender_fee_payer_balance",
+            "Transaction fee payer balance",
+        )
     }
 }
 
diff --git a/relayer/src/message_relayer/common/gear_block_listener.rs b/relayer/src/message_relayer/common/gear_block_listener.rs
index 3873554a..5e1b932a 100644
--- a/relayer/src/message_relayer/common/gear_block_listener.rs
+++ b/relayer/src/message_relayer/common/gear_block_listener.rs
@@ -26,22 +26,10 @@ impl MeteredService for GearBlockListener {
 
 impl_metered_service! {
     struct Metrics {
-        latest_block: IntGauge,
-    }
-}
-
-impl Metrics {
-    fn new() -> Self {
-        Self::new_inner().expect("Failed to create metrics")
-    }
-
-    fn new_inner() -> prometheus::Result<Self> {
-        Ok(Self {
-            latest_block: IntGauge::new(
-                "gear_block_listener_latest_block",
-                "Latest gear block discovered by gear block listener",
-            )?,
-        })
+        latest_block: IntGauge = IntGauge::new(
+            "gear_block_listener_latest_block",
+            "Latest gear block discovered by gear block listener",
+        )
     }
 }
 
diff --git a/relayer/src/message_relayer/common/merkle_root_extractor.rs b/relayer/src/message_relayer/common/merkle_root_extractor.rs
index 6bcbd511..42b55ac6 100644
--- a/relayer/src/message_relayer/common/merkle_root_extractor.rs
+++ b/relayer/src/message_relayer/common/merkle_root_extractor.rs
@@ -23,22 +23,10 @@ impl MeteredService for MerkleRootExtractor {
 
 impl_metered_service! {
     struct Metrics {
-        latest_merkle_root_for_block: IntGauge
-    }
-}
-
-impl Metrics {
-    fn new() -> Self {
-        Self::new_inner().expect("Failed to create metrics")
-    }
-
-    fn new_inner() -> prometheus::Result<Self> {
-        Ok(Self {
-            latest_merkle_root_for_block: IntGauge::new(
-                "merkle_root_extractor_latest_merkle_root_for_block",
-                "Latest gear block present in found merkle roots",
-            )?,
-        })
+        latest_merkle_root_for_block: IntGauge = IntGauge::new(
+            "merkle_root_extractor_latest_merkle_root_for_block",
+            "Latest gear block present in found merkle roots",
+        )
     }
 }
 
diff --git a/relayer/src/message_relayer/common/message_paid_event_extractor.rs b/relayer/src/message_relayer/common/message_paid_event_extractor.rs
index f14bbd0c..1a0e0cc8 100644
--- a/relayer/src/message_relayer/common/message_paid_event_extractor.rs
+++ b/relayer/src/message_relayer/common/message_paid_event_extractor.rs
@@ -34,22 +34,10 @@ impl MeteredService for MessagePaidEventExtractor {
 
 impl_metered_service! {
     struct Metrics {
-        total_messages_found: IntCounter,
-    }
-}
-
-impl Metrics {
-    fn new() -> Self {
-        Self::new_inner().expect("Failed to create metrics")
-    }
-
-    fn new_inner() -> prometheus::Result<Self> {
-        Ok(Self {
-            total_messages_found: IntCounter::new(
-                "message_paid_event_extractor_total_messages_found",
-                "Total amount of paid messages discovered",
-            )?,
-        })
+        total_messages_found: IntCounter = IntCounter::new(
+            "message_paid_event_extractor_total_messages_found",
+            "Total amount of paid messages discovered",
+        ),
     }
 }
 
diff --git a/relayer/src/message_relayer/common/message_queued_event_extractor.rs b/relayer/src/message_relayer/common/message_queued_event_extractor.rs
index 5aab0c5e..140afb4e 100644
--- a/relayer/src/message_relayer/common/message_queued_event_extractor.rs
+++ b/relayer/src/message_relayer/common/message_queued_event_extractor.rs
@@ -21,22 +21,10 @@ impl MeteredService for MessageQueuedEventExtractor {
 
 impl_metered_service! {
     struct Metrics {
-        total_messages_found: IntCounter,
-    }
-}
-
-impl Metrics {
-    fn new() -> Self {
-        Self::new_inner().expect("Failed to create metrics")
-    }
-
-    fn new_inner() -> prometheus::Result<Self> {
-        Ok(Self {
-            total_messages_found: IntCounter::new(
-                "message_queued_event_extractor_total_messages_found",
-                "Total amount of messages discovered",
-            )?,
-        })
+        total_messages_found: IntCounter = IntCounter::new(
+            "message_queued_event_extractor_total_messages_found",
+            "Total amount of messages discovered",
+        ),
     }
 }
 
diff --git a/relayer/src/message_relayer/common/paid_messages_filter.rs b/relayer/src/message_relayer/common/paid_messages_filter.rs
index 4ee40b26..cb8399fe 100644
--- a/relayer/src/message_relayer/common/paid_messages_filter.rs
+++ b/relayer/src/message_relayer/common/paid_messages_filter.rs
@@ -23,22 +23,10 @@ impl MeteredService for PaidMessagesFilter {
 
 impl_metered_service! {
     struct Metrics {
-        pending_messages_count: IntGauge
-    }
-}
-
-impl Metrics {
-    fn new() -> Self {
-        Self::new_inner().expect("Failed to create metrics")
-    }
-
-    fn new_inner() -> prometheus::Result<Self> {
-        Ok(Self {
-            pending_messages_count: IntGauge::new(
-                "paid_messages_filter_pending_messages_count",
-                "Amount of discovered but not paid messages",
-            )?,
-        })
+        pending_messages_count: IntGauge = IntGauge::new(
+            "paid_messages_filter_pending_messages_count",
+            "Amount of discovered but not paid messages",
+        )
     }
 }
 
diff --git a/relayer/src/proof_storage/gear.rs b/relayer/src/proof_storage/gear.rs
index b96300a4..919a4cb1 100644
--- a/relayer/src/proof_storage/gear.rs
+++ b/relayer/src/proof_storage/gear.rs
@@ -44,22 +44,10 @@ struct Cache {
 
 impl_metered_service! {
     struct Metrics {
-        fee_payer_balance: Gauge
-    }
-}
-
-impl Metrics {
-    fn new() -> Self {
-        Self::new_inner().expect("Failed to create metrics")
-    }
-
-    fn new_inner() -> prometheus::Result<Self> {
-        Ok(Self {
-            fee_payer_balance: Gauge::new(
-                "gear_proof_storage_fee_payer_balance",
-                "Gear proof storage fee payer balance",
-            )?,
-        })
+        fee_payer_balance: Gauge = Gauge::new(
+            "gear_proof_storage_fee_payer_balance",
+            "Gear proof storage fee payer balance",
+        )
     }
 }
 
diff --git a/relayer/src/relay_merkle_roots.rs b/relayer/src/relay_merkle_roots.rs
index 0dd92bd4..fdff7f44 100644
--- a/relayer/src/relay_merkle_roots.rs
+++ b/relayer/src/relay_merkle_roots.rs
@@ -28,32 +28,18 @@ pub struct MerkleRootRelayer {
 
 impl_metered_service! {
     struct Metrics {
-        latest_proven_era: IntGauge,
-        latest_observed_gear_era: IntGauge,
-        fee_payer_balance: Gauge
-    }
-}
-
-impl Metrics {
-    fn new() -> Self {
-        Self::new_inner().expect("Failed to create metrics")
-    }
-
-    fn new_inner() -> prometheus::Result<Self> {
-        Ok(Self {
-            latest_proven_era: IntGauge::new(
-                "merkle_root_relayer_latest_proven_era",
-                "Latest proven era number",
-            )?,
-            latest_observed_gear_era: IntGauge::new(
-                "merkle_root_relayer_latest_observed_gear_era",
-                "Latest era number observed by relayer",
-            )?,
-            fee_payer_balance: Gauge::new(
-                "merkle_root_relayer_fee_payer_balance",
-                "Transaction fee payer balance",
-            )?,
-        })
+        latest_proven_era: IntGauge = IntGauge::new(
+            "merkle_root_relayer_latest_proven_era",
+            "Latest proven era number",
+        ),
+        latest_observed_gear_era: IntGauge = IntGauge::new(
+            "merkle_root_relayer_latest_observed_gear_era",
+            "Latest era number observed by relayer",
+        ),
+        fee_payer_balance: Gauge = Gauge::new(
+            "merkle_root_relayer_fee_payer_balance",
+            "Transaction fee payer balance",
+        )
     }
 }
 
@@ -276,24 +262,11 @@ impl MeteredService for Eras {
 
 impl_metered_service! {
     struct EraMetrics {
-        sealed_not_finalized_count: IntGauge,
-        last_sealed_era: IntGauge
-    }
-}
-
-impl EraMetrics {
-    fn new() -> Self {
-        Self::new_inner().expect("Failed to create metrics")
-    }
-
-    fn new_inner() -> prometheus::Result<Self> {
-        Ok(Self {
-            sealed_not_finalized_count: IntGauge::new(
-                "sealed_not_finalized_count",
-                "Amount of eras that have been sealed but tx is not yet finalized by ethereum",
-            )?,
-            last_sealed_era: IntGauge::new("last_sealed_era", "Latest era that have been sealed")?,
-        })
+        sealed_not_finalized_count: IntGauge = IntGauge::new(
+            "sealed_not_finalized_count",
+            "Amount of eras that have been sealed but tx is not yet finalized by ethereum",
+        ),
+        last_sealed_era: IntGauge = IntGauge::new("last_sealed_era", "Latest era that have been sealed"),
     }
 }
 
diff --git a/utils-prometheus/src/lib.rs b/utils-prometheus/src/lib.rs
index 36efa7de..22d3ac78 100644
--- a/utils-prometheus/src/lib.rs
+++ b/utils-prometheus/src/lib.rs
@@ -21,12 +21,12 @@ macro_rules! impl_metered_service {
         $vis:vis struct $struct_name:ident {
             $(
                 $(#[$($attributes:tt)*])*
-                $field_vis:vis $field_name:ident: $field_type:ty
+                $field_vis:vis $field_name:ident : $field_type:ty = $constructor:expr
             ),*
             $(,)?
         }
     ) => {
-        #[derive(Clone, Debug)]
+        #[derive(Clone)]
         $(#[$($struct_attributes)*])*
         $vis struct $struct_name {
             $(
@@ -51,6 +51,20 @@ macro_rules! impl_metered_service {
                 ]
             }
         }
+
+        impl $struct_name {
+            $vis fn new() -> Self {
+                let new_inner = || -> prometheus::Result<Self> {
+                    Ok(Self {
+                        $(
+                            $field_name: $constructor ?
+                        ),*
+                    })
+                };
+
+                new_inner().expect("Failed to create metrics")
+            }
+        }
     }
 }