Lower devnet's initial difficulty (#1869)

* Lower devnet's initial difficulty

* Increase simple-sync timeToPropagate to 10 seconds

* Check expectedAveragePropagationTime

Co-authored-by: Ori Newman <>
Co-authored-by: stasatdaglabs <39559713+stasatdaglabs@users.noreply.github.com>

domain/consensus/processes/dagtraversalmanager/window_test.go

@@ -205,32 +205,32 @@ func TestBlockWindow(t *testing.T) {
 			{
 				parents:        []string{"H", "F"},
 				id:             "I",
-				expectedWindow: []string{"F", "D", "H", "C", "B", "G"},
+				expectedWindow: []string{"F", "D", "H", "C", "G", "B"},
 			},
 			{
 				parents:        []string{"I"},
 				id:             "J",
-				expectedWindow: []string{"I", "F", "D", "H", "C", "B", "G"},
+				expectedWindow: []string{"I", "F", "D", "H", "C", "G", "B"},
 			},
 			{
 				parents:        []string{"J"},
 				id:             "K",
-				expectedWindow: []string{"J", "I", "F", "D", "H", "C", "B", "G"},
+				expectedWindow: []string{"J", "I", "F", "D", "H", "C", "G", "B"},
 			},
 			{
 				parents:        []string{"K"},
 				id:             "L",
-				expectedWindow: []string{"K", "J", "I", "F", "D", "H", "C", "B", "G"},
+				expectedWindow: []string{"K", "J", "I", "F", "D", "H", "C", "G", "B"},
 			},
 			{
 				parents:        []string{"L"},
 				id:             "M",
-				expectedWindow: []string{"L", "K", "J", "I", "F", "D", "H", "C", "B", "G"},
+				expectedWindow: []string{"L", "K", "J", "I", "F", "D", "H", "C", "G", "B"},
 			},
 			{
 				parents:        []string{"M"},
 				id:             "N",
-				expectedWindow: []string{"M", "L", "K", "J", "I", "F", "D", "H", "C", "B"},
+				expectedWindow: []string{"M", "L", "K", "J", "I", "F", "D", "H", "C", "G"},
 			},
 			{
 				parents:        []string{"N"},

domain/consensus/processes/difficultymanager/difficultymanager_test.go

@@ -129,8 +129,10 @@ func TestDifficulty(t *testing.T) {
 
 		var expectedBits uint32
 		switch consensusConfig.Name {
-		case dagconfig.TestnetParams.Name, dagconfig.DevnetParams.Name:
+		case dagconfig.TestnetParams.Name:
 			expectedBits = uint32(0x1e7f1441)
+		case dagconfig.DevnetParams.Name:
+			expectedBits = uint32(0x207f1441)
 		case dagconfig.MainnetParams.Name:
 			expectedBits = uint32(0x1d02c50f)
 		}

domain/consensus/processes/pruningmanager/pruning_test.go

@@ -38,7 +38,7 @@ func TestPruning(t *testing.T) {
 		"dag-for-test-pruning.json": {
 			dagconfig.MainnetParams.Name: "503",
 			dagconfig.TestnetParams.Name: "502",
-			dagconfig.DevnetParams.Name:  "502",
+			dagconfig.DevnetParams.Name:  "503",
 			dagconfig.SimnetParams.Name:  "502",
 		},
 	}

domain/dagconfig/genesis.go

@@ -105,10 +105,7 @@ var devnetGenesisCoinbaseTx = transactionhelper.NewSubnetworkTransaction(0,
 // devGenesisHash is the hash of the first block in the block DAG for the development
 // network (genesis block).
 var devnetGenesisHash = externalapi.NewDomainHashFromByteArray(&[externalapi.DomainHashSize]byte{
-	0x34, 0x3b, 0x53, 0xb7, 0xad, 0x82, 0x8a, 0x33,
+	0x4c, 0x64, 0x16, 0x35, 0xc8, 0x5d, 0xc8, 0x8d, 0x90, 0xbe, 0x2a, 0x42, 0xc1, 0xf6, 0x0f, 0xc4, 0xe9, 0xfc, 0xfc, 0xda, 0xdb, 0x53, 0x0d, 0x51, 0xe3, 0x02, 0x2b, 0x68, 0x65, 0xa6, 0x46, 0x7b,
-	0x4b, 0x03, 0xb1, 0xbb, 0x13, 0x15, 0xb0, 0x75,
-	0xf3, 0xf0, 0x40, 0xfb, 0x64, 0x0c, 0xca, 0x19,
-	0xc9, 0x61, 0xe7, 0x69, 0xdb, 0x98, 0x98, 0x3e,
 })
 
 // devnetGenesisMerkleRoot is the hash of the first transaction in the genesis block
@@ -130,7 +127,7 @@ var devnetGenesisBlock = externalapi.DomainBlock{
 		&externalapi.DomainHash{},
 		externalapi.NewDomainHashFromByteArray(muhash.EmptyMuHashHash.AsArray()),
 		0x11e9db49828,
-		0x1e7fffff,
+		0x207fffff,
 		0x48e5e,
 		0,
 		0,

stability-tests/simple-sync/mineloop.go

@@ -26,6 +26,7 @@ func mineLoop(syncerRPCClient, syncedRPCClient *rpc.Client) error {
 		return err
 	}
 	log.Infof("Starting to mine")
+	totalTime := time.Duration(0)
 	for i := uint64(0); i < activeConfig().NumberOfBlocks; i++ {
 		log.Infof("Mining block %d...", i+1)
 		err = mineBlock(syncerRPCClient.Address(), miningAddr)
@@ -35,12 +36,14 @@ func mineLoop(syncerRPCClient, syncedRPCClient *rpc.Client) error {
 			log.Warnf("mineBlock returned an err: %s", err)
 		}
 
-		const timeToPropagate = 1 * time.Second
+		start := time.Now()
+		const timeToPropagate = 10 * time.Second
 		select {
 		case <-syncedRPCClient.OnBlockAdded:
 		case <-time.After(timeToPropagate):
 			return errors.Errorf("block %d took more than %s to propagate", i+1, timeToPropagate)
 		}
+		totalTime += time.Since(start)
 
 		syncerResult, err := syncerRPCClient.GetBlockDAGInfo()
 		if err != nil {
@@ -57,6 +60,12 @@ func mineLoop(syncerRPCClient, syncedRPCClient *rpc.Client) error {
 		}
 	}
 
+	const expectedAveragePropagationTime = time.Second
+	averagePropagationTime := totalTime / time.Duration(activeConfig().NumberOfBlocks)
+	if averagePropagationTime > expectedAveragePropagationTime {
+		return errors.Errorf("average block propagation time %s is higher than expected (%s)", averagePropagationTime, expectedAveragePropagationTime)
+	}
+
 	log.Infof("Finished to mine")
 
 	log.Infof("Getting syncer block count")

util/difficulty/difficulty_test.go

@@ -16,7 +16,7 @@ func TestGetHashrateString(t *testing.T) {
 	var results = map[string]string{
 		dagconfig.MainnetParams.Name: "1.53 GH/s",
 		dagconfig.TestnetParams.Name: "131.07 KH/s",
-		dagconfig.DevnetParams.Name:  "131.07 KH/s",
+		dagconfig.DevnetParams.Name:  "2 H/s",
 		dagconfig.SimnetParams.Name:  "2.00 KH/s",
 	}
 	testutils.ForAllNets(t, false, func(t *testing.T, consensusConfig *consensus.Config) {