[Consensus] Revert unsealed reason

engine/consensus/approvals/tracker/record.go

@@ -2,6 +2,7 @@ package tracker
 
 import (
 	"encoding/hex"
+	"encoding/json"
 	"fmt"
 
 	"github.com/onflow/flow-go/model/flow"
@@ -32,11 +33,18 @@ func (r *SealingRecord) ApprovalsMissing(chunksWithMissingApprovals map[uint64]f
 	sufficientApprovals := len(chunksWithMissingApprovals) == 0
 	r.entries["sufficient_approvals_for_sealing"] = sufficientApprovals
 	if !sufficientApprovals {
-		indices := make([]string, 0, len(chunksWithMissingApprovals))
+		chunksInfo := make([]map[string]interface{}, 0, len(chunksWithMissingApprovals))
 		for i, list := range chunksWithMissingApprovals {
-			indices = append(indices, fmt.Sprintf("chunk_index: %v, verifier_ids: %v", i, list))
+			chunk := make(map[string]interface{})
+			chunk["chunk_index"] = i
+			chunk["missing_approvals_from_verifiers"] = list
+			chunksInfo = append(chunksInfo, chunk)
 		}
-		r.entries["chunks_with_insufficient_approvals"] = indices
+		bytes, err := json.Marshal(chunksInfo)
+		if err != nil {
+			bytes = []byte("failed to marshal data about chunks with missing approvals")
+		}
+		r.entries["chunks_with_insufficient_approvals"] = string(bytes)
 	}
 }
 

engine/consensus/approvals/tracker/tracker.go

@@ -3,7 +3,6 @@ package tracker
 import (
 	"encoding/hex"
 	"encoding/json"
-	"fmt"
 	"time"
 
 	"github.com/rs/zerolog"
@@ -171,24 +170,7 @@ func (st *SealingObservation) Complete() {
 
 	// dump observation to Logger
 	observation = observation.Int64("duration_ms", time.Since(st.startTime).Milliseconds())
-	reason := st.UnsealedReason()
-	observation.Msgf("sealing observation, unsealed reason: %v", reason)
-}
-
-func (st *SealingObservation) UnsealedReason() string {
-	if st.finalizedBlock == st.latestSealedBlock {
-		return "all finalized blocks have been sealed"
-	}
-
-	unsealedHeight := st.latestSealedBlock.Height + 1
-	if len(st.records) == 0 {
-		return fmt.Sprintf("no result found for next unsealed block at height: %v", unsealedHeight)
-	}
-
-	return fmt.Sprintf("unsealed block at height %v has been executed, the result has been incorporated on %v fork(s), "+
-		"but no result has received enough approvals, check the chunks_with_insufficient_approvals field for more details",
-		len(st.records),
-		unsealedHeight)
+	observation.Msg("sealing observation")
 }
 
 // latestFinalizedSealInfo returns a json string representation with the most