OffchainLabs · prestonvanloon · Sep 23, 2025 · Sep 19, 2025 · Sep 22, 2025 · Sep 23, 2025
diff --git a/WORKSPACE b/WORKSPACE
@@ -327,9 +327,9 @@ filegroup(
     visibility = ["//visibility:public"],
 )
 """,
-    integrity = "sha256-YVFFrCmjoGZ3fXMWpsCpSsYbANy1grnqYwOLKIg2SsA=",
-    strip_prefix = "holesky-32a72e21c6e53c262f27d50dd540cb654517d03a",
-    url = "https://github.com/eth-clients/holesky/archive/32a72e21c6e53c262f27d50dd540cb654517d03a.tar.gz",  # 2025-03-17
+    integrity = "sha256-dB5vtXbG4XkyL6Tr2+VjJk3/17yqgcWI/WXf2s7FznE=",
+    strip_prefix = "holesky-bd469753624a53b8855fcf2c2f5edfcd2936e425",
+    url = "https://github.com/eth-clients/holesky/archive/bd469753624a53b8855fcf2c2f5edfcd2936e425.tar.gz",
 )
 
 http_archive(
@@ -359,9 +359,9 @@ filegroup(
     visibility = ["//visibility:public"],
 )
 """,
-    integrity = "sha256-b5F7Wg9LLMqGRIpP2uqb/YsSFVn2ynzlV7g/Nb1EFLk=",
-    strip_prefix = "sepolia-562d9938f08675e9ba490a1dfba21fb05843f39f",
-    url = "https://github.com/eth-clients/sepolia/archive/562d9938f08675e9ba490a1dfba21fb05843f39f.tar.gz",  # 2025-03-17
+    integrity = "sha256-jF05y+5f3Wcp2b6sKh6ip0b//rrV65X4iFDyjZ2cIbE=",
+    strip_prefix = "sepolia-56f0bff41cecab6c661251d72b73ceecc52c5701",
+    url = "https://github.com/eth-clients/sepolia/archive/56f0bff41cecab6c661251d72b73ceecc52c5701.tar.gz",
 )
 
 http_archive(
@@ -375,9 +375,9 @@ filegroup(
     visibility = ["//visibility:public"],
 )
 """,
-    integrity = "sha256-dPiEWUd8QvbYGwGtIm0QtCekitVLOLsW5rpQIGzz8PU=",
-    strip_prefix = "hoodi-828c2c940e1141092bd4bb979cef547ea926d272",
-    url = "https://github.com/eth-clients/hoodi/archive/828c2c940e1141092bd4bb979cef547ea926d272.tar.gz",
+    integrity = "sha256-vvbKzHQSurReSRxaBIhxsYavajvN19goigA1xATzIEo=",
+    strip_prefix = "hoodi-21a110a60e6558a2ba7c819fa4b80029d49ab205",
+    url = "https://github.com/eth-clients/hoodi/archive/21a110a60e6558a2ba7c819fa4b80029d49ab205.tar.gz",
 )
 
 http_archive(

diff --git a/changelog/ttsao_set-fulu-fork-epochs.md b/changelog/ttsao_set-fulu-fork-epochs.md
@@ -0,0 +1,3 @@
+### Changed
+
+- Set Fulu fork epochs for Holesky, Hoodi, and Sepolia testnets
diff --git a/config/params/loader_test.go b/config/params/loader_test.go
@@ -30,6 +30,7 @@ var placeholderFields = []string{
 	"ATTESTATION_DUE_BPS",
 	"ATTESTATION_DUE_BPS_GLOAS",
 	"BLOB_SIDECAR_SUBNET_COUNT_FULU",
+	"CELLS_PER_EXT_BLOB",
 	"CONTRIBUTION_DUE_BPS",
 	"CONTRIBUTION_DUE_BPS_GLOAS",
 	"EIP6110_FORK_EPOCH",
@@ -45,10 +46,13 @@ var placeholderFields = []string{
 	"EIP7928_FORK_EPOCH",
 	"EIP7928_FORK_VERSION",
 	"EPOCHS_PER_SHUFFLING_PHASE",
+	"FIELD_ELEMENTS_PER_CELL",     // Configured as a constant in config/fieldparams/mainnet.go
+	"FIELD_ELEMENTS_PER_EXT_BLOB", // Configured in proto/ssz_proto_library.bzl
 	"GLOAS_FORK_EPOCH",
 	"GLOAS_FORK_VERSION",
 	"INCLUSION_LIST_SUBMISSION_DEADLINE",
 	"INCLUSION_LIST_SUBMISSION_DUE_BPS",
+	"KZG_COMMITMENTS_INCLUSION_PROOF_DEPTH", // Configured in proto/ssz_proto_library.bzl
 	"MAX_BYTES_PER_INCLUSION_LIST",
 	"MAX_REQUEST_BLOB_SIDECARS_FULU",
 	"MAX_REQUEST_INCLUSION_LIST",
@@ -388,6 +392,7 @@ func presetsFilePath(t *testing.T, config string) []string {
 		path.Join(fPath, "presets", config, "capella.yaml"),
 		path.Join(fPath, "presets", config, "deneb.yaml"),
 		path.Join(fPath, "presets", config, "electra.yaml"),
+		path.Join(fPath, "presets", config, "fulu.yaml"),
 	}
 }
 

diff --git a/config/params/testnet_holesky_config.go b/config/params/testnet_holesky_config.go
@@ -1,7 +1,5 @@
 package params
 
-import "math"
-
 // UseHoleskyNetworkConfig uses the Holesky beacon chain specific network config.
 func UseHoleskyNetworkConfig() {
 	cfg := BeaconNetworkConfig().Copy()
@@ -41,12 +39,21 @@ func HoleskyConfig() *BeaconChainConfig {
 	cfg.DenebForkVersion = []byte{0x05, 0x1, 0x70, 0x0}
 	cfg.ElectraForkEpoch = 115968 // Mon, Feb 24 at 21:55:12 UTC
 	cfg.ElectraForkVersion = []byte{0x06, 0x1, 0x70, 0x0}
-	cfg.FuluForkEpoch = math.MaxUint64
-	cfg.FuluForkVersion = []byte{0x07, 0x1, 0x70, 0x0} // TODO: Define holesky fork version for fulu. This is a placeholder value.
+	cfg.FuluForkEpoch = 165120 // 2025-10-01 08:48:00 UTC
+	cfg.FuluForkVersion = []byte{0x07, 0x1, 0x70, 0x0}
 	cfg.TerminalTotalDifficulty = "0"
 	cfg.DepositContractAddress = "0x4242424242424242424242424242424242424242"
 	cfg.EjectionBalance = 28000000000
-	cfg.BlobSchedule = []BlobScheduleEntry{}
+	cfg.BlobSchedule = []BlobScheduleEntry{
+		{
+			MaxBlobsPerBlock: 15,
+			Epoch:            166400, // 2025-10-07 01:20:00 UTC
+		},
+		{
+			MaxBlobsPerBlock: 21,
+			Epoch:            167936, // 2025-10-13 21:10:24 UTC
+		},
+	}
 	cfg.InitializeForkSchedule()
 	return cfg
 }
diff --git a/config/params/testnet_hoodi_config.go b/config/params/testnet_hoodi_config.go
@@ -1,9 +1,5 @@
 package params
 
-import (
-	"math"
-)
-
 // UseHoodiNetworkConfig uses the Hoodi beacon chain specific network config.
 func UseHoodiNetworkConfig() {
 	cfg := BeaconNetworkConfig().Copy()
@@ -49,11 +45,20 @@ func HoodiConfig() *BeaconChainConfig {
 	cfg.DenebForkVersion = []byte{0x50, 0x00, 0x09, 0x10}
 	cfg.ElectraForkEpoch = 2048
 	cfg.ElectraForkVersion = []byte{0x60, 0x00, 0x09, 0x10}
-	cfg.FuluForkEpoch = math.MaxUint64
+	cfg.FuluForkEpoch = 50688 // 2025-10-28 18:53:12 UTC
 	cfg.FuluForkVersion = []byte{0x70, 0x00, 0x09, 0x10}
 	cfg.TerminalTotalDifficulty = "0"
 	cfg.DepositContractAddress = "0x00000000219ab540356cBB839Cbe05303d7705Fa"
-	cfg.BlobSchedule = []BlobScheduleEntry{}
+	cfg.BlobSchedule = []BlobScheduleEntry{
+		{
+			MaxBlobsPerBlock: 15,
+			Epoch:            52480, // 2025-11-05 18:02:00 UTC
+		},
+		{
+			MaxBlobsPerBlock: 21,
+			Epoch:            54016, // 2025-11-12 13:52:24 UTC
+		},
+	}
 	cfg.DefaultBuilderGasLimit = uint64(60000000)
 	cfg.InitializeForkSchedule()
 	return cfg

diff --git a/config/params/testnet_sepolia_config.go b/config/params/testnet_sepolia_config.go
@@ -1,8 +1,6 @@
 package params
 
 import (
-	"math"
-
 	eth1Params "github.com/ethereum/go-ethereum/params"
 )
 
@@ -46,12 +44,21 @@ func SepoliaConfig() *BeaconChainConfig {
 	cfg.DenebForkVersion = []byte{0x90, 0x00, 0x00, 0x73}
 	cfg.ElectraForkEpoch = 222464 // Wed, Mar 5 at 07:29:36 UTC
 	cfg.ElectraForkVersion = []byte{0x90, 0x00, 0x00, 0x74}
-	cfg.FuluForkEpoch = math.MaxUint64
-	cfg.FuluForkVersion = []byte{0x90, 0x00, 0x00, 0x75} // TODO: Define sepolia fork version for fulu. This is a placeholder value.
+	cfg.FuluForkEpoch = 272640 // 2025-10-14 07:36:00 UTC
+	cfg.FuluForkVersion = []byte{0x90, 0x00, 0x00, 0x75}
 	cfg.TerminalTotalDifficulty = "17000000000000000"
 	cfg.DepositContractAddress = "0x7f02C3E3c98b133055B8B348B2Ac625669Ed295D"
 	cfg.DefaultBuilderGasLimit = uint64(60000000)
-	cfg.BlobSchedule = []BlobScheduleEntry{}
+	cfg.BlobSchedule = []BlobScheduleEntry{
+		{
+			MaxBlobsPerBlock: 15,
+			Epoch:            274176, // 2025-10-21 03:26:24 UTC
+		},
+		{
+			MaxBlobsPerBlock: 21,
+			Epoch:            275712, // 2025-10-27 23:16:48 UTC
+		},
+	}
 	cfg.InitializeForkSchedule()
 	return cfg
 }
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		### Changed

		- Set Fulu fork epochs for Holesky, Hoodi, and Sepolia testnets