eth/catalyst, miner: deduplicate work + show payload id (#26115)

This PR now also includes a fix to the problem of mult-routines building blocks on the same input. This PR works as before with regards to stopping the work, but it just will not spin up a second routine if one is already building. So if the CL does N calls to FCU+buildblock, and N calls to GetPayload, only the first of each will do something, the other calls will be mostly no-ops.

This PR also adds printout of the payload id into the logs.

eth/catalyst/api.go

@@ -18,8 +18,6 @@
 package catalyst
 
 import (
-	"crypto/sha256"
-	"encoding/binary"
 	"errors"
 	"fmt"
 	"math/big"
@@ -288,12 +286,17 @@ func (api *ConsensusAPI) ForkchoiceUpdatedV1(update beacon.ForkchoiceStateV1, pa
 			FeeRecipient: payloadAttributes.SuggestedFeeRecipient,
 			Random:       payloadAttributes.Random,
 		}
+		id := args.Id()
+		// If we already are busy generating this work, then we do not need
+		// to start a second process.
+		if api.localBlocks.has(id) {
+			return valid(&id), nil
+		}
 		payload, err := api.eth.Miner().BuildPayload(args)
 		if err != nil {
 			log.Error("Failed to build payload", "err", err)
 			return valid(nil), beacon.InvalidPayloadAttributes.With(err)
 		}
-		id := computePayloadId(update.HeadBlockHash, payloadAttributes)
 		api.localBlocks.put(id, payload)
 		return valid(&id), nil
 	}
@@ -443,19 +446,6 @@ func (api *ConsensusAPI) NewPayloadV1(params beacon.ExecutableDataV1) (beacon.Pa
 	return beacon.PayloadStatusV1{Status: beacon.VALID, LatestValidHash: &hash}, nil
 }
 
-// computePayloadId computes a pseudo-random payloadid, based on the parameters.
-func computePayloadId(headBlockHash common.Hash, params *beacon.PayloadAttributesV1) beacon.PayloadID {
-	// Hash
-	hasher := sha256.New()
-	hasher.Write(headBlockHash[:])
-	binary.Write(hasher, binary.BigEndian, params.Timestamp)
-	hasher.Write(params.Random[:])
-	hasher.Write(params.SuggestedFeeRecipient[:])
-	var out beacon.PayloadID
-	copy(out[:], hasher.Sum(nil)[:8])
-	return out
-}
-
 // delayPayloadImport stashes the given block away for import at a later time,
 // either via a forkchoice update or a sync extension. This method is meant to
 // be called by the newpayload command when the block seems to be ok, but some

eth/catalyst/api_test.go

@@ -184,7 +184,12 @@ func TestEth2PrepareAndGetPayload(t *testing.T) {
 	}
 	// give the payload some time to be built
 	time.Sleep(100 * time.Millisecond)
-	payloadID := computePayloadId(fcState.HeadBlockHash, &blockParams)
+	payloadID := (&miner.BuildPayloadArgs{
+		Parent:       fcState.HeadBlockHash,
+		Timestamp:    blockParams.Timestamp,
+		FeeRecipient: blockParams.SuggestedFeeRecipient,
+		Random:       blockParams.Random,
+	}).Id()
 	execData, err := api.GetPayloadV1(payloadID)
 	if err != nil {
 		t.Fatalf("error getting payload, err=%v", err)

eth/catalyst/queue.go

@@ -85,6 +85,22 @@ func (q *payloadQueue) get(id beacon.PayloadID) *beacon.ExecutableDataV1 {
 	return nil
 }
 
+// has checks if a particular payload is already tracked.
+func (q *payloadQueue) has(id beacon.PayloadID) bool {
+	q.lock.RLock()
+	defer q.lock.RUnlock()
+
+	for _, item := range q.payloads {
+		if item == nil {
+			return false
+		}
+		if item.id == id {
+			return true
+		}
+	}
+	return false
+}
+
 // headerQueueItem represents an hash->header tuple to store until it's retrieved
 // or evicted.
 type headerQueueItem struct {