Don't rely on a metric value for the ETH display in the status bar

beacon_chain/beacon_node_common.nim

@@ -56,6 +56,7 @@ type
     genesisSnapshotContent*: string
     attestationSubnets*: AttestationSubnets
     processor*: ref Eth2Processor
+    attachedValidatorBalanceTotal*: uint64
 
 const
   MaxEmptySlotCount* = uint64(10*60) div SECONDS_PER_SLOT

beacon_chain/nimbus_beacon_node.nim

@@ -983,7 +983,7 @@ when hasPrompt:
           slotStr
 
         of "attached_validators_balance":
-          formatGwei(attached_validator_balance_total.value.uint64)
+          formatGwei(node.attachedValidatorBalanceTotal)
 
         of "sync_status":
           if isNil(node.syncManager):

beacon_chain/validator_duties.nim

@@ -576,6 +576,7 @@ proc updateMetrics(node: BeaconNode) =
         inc i
       total += balance
 
+    node.attachedValidatorBalanceTotal = total
     attached_validator_balance_total.set(min(total, int64.high.uint64).int64)
   else:
     discard