Add mainnet configs

Author: eserilev

common/eth2_network_config/built_in_network_configs/mainnet/config.yaml

@@ -52,7 +52,7 @@ ELECTRA_FORK_VERSION: 0x05000000
 ELECTRA_FORK_EPOCH: 364032 # May 7, 2025, 10:05:11am UTC
 # Fulu
 FULU_FORK_VERSION: 0x06000000
-FULU_FORK_EPOCH: 18446744073709551615
+FULU_FORK_EPOCH: 411392 # December 3, 2025, 09:49:11pm UTC
 # Gloas
 GLOAS_FORK_VERSION: 0x07000000
 GLOAS_FORK_EPOCH: 18446744073709551615
@@ -61,6 +61,8 @@ GLOAS_FORK_EPOCH: 18446744073709551615
 # ---------------------------------------------------------------
 # 12 seconds
 SECONDS_PER_SLOT: 12
+# 12000 milliseconds
+SLOT_DURATION_MS: 12000
 # 14 (estimate from Eth1 mainnet)
 SECONDS_PER_ETH1_BLOCK: 14
 # 2**8 (= 256) epochs ~27 hours
@@ -69,6 +71,18 @@ MIN_VALIDATOR_WITHDRAWABILITY_DELAY: 256
 SHARD_COMMITTEE_PERIOD: 256
 # 2**11 (= 2,048) Eth1 blocks ~8 hours
 ETH1_FOLLOW_DISTANCE: 2048
+# 1667 basis points, ~17% of SLOT_DURATION_MS
+PROPOSER_REORG_CUTOFF_BPS: 1667
+# 3333 basis points, ~33% of SLOT_DURATION_MS
+ATTESTATION_DUE_BPS: 3333
+# 6667 basis points, ~67% of SLOT_DURATION_MS
+AGGREGATE_DUE_BPS: 6667
+
+# Altair
+# 3333 basis points, ~33% of SLOT_DURATION_MS
+SYNC_MESSAGE_DUE_BPS: 3333
+# 6667 basis points, ~67% of SLOT_DURATION_MS
+CONTRIBUTION_DUE_BPS: 6667
 
 # Validator cycle
 # ---------------------------------------------------------------
@@ -156,13 +170,30 @@ MAX_BLOBS_PER_BLOCK_ELECTRA: 9
 MAX_REQUEST_BLOB_SIDECARS_ELECTRA: 1152
 
 # Fulu
+# 2**7 (= 128) groups
 NUMBER_OF_CUSTODY_GROUPS: 128
+# 2**7 (= 128) subnets
 DATA_COLUMN_SIDECAR_SUBNET_COUNT: 128
+# MAX_REQUEST_BLOCKS_DENEB * NUMBER_OF_COLUMNS (= 128 * 128) sidecars
 MAX_REQUEST_DATA_COLUMN_SIDECARS: 16384
+# 2**3 (= 8) samples
 SAMPLES_PER_SLOT: 8
+# 2**2 (= 4) sidecars
 CUSTODY_REQUIREMENT: 4
+# 2**3 (= 8) sidecars
 VALIDATOR_CUSTODY_REQUIREMENT: 8
+# 2**5 * 10**9 (= 32,000,000,000) Gwei
 BALANCE_PER_ADDITIONAL_CUSTODY_GROUP: 32000000000
+# 2**12 (= 4,096) epochs
 MIN_EPOCHS_FOR_DATA_COLUMN_SIDECARS_REQUESTS: 4096
 
+# Blob Scheduling
+# ---------------------------------------------------------------
+
+BLOB_SCHEDULE:
+  - EPOCH: 412672  # December 9, 2025, 02:21:11pm UTC
+    MAX_BLOBS_PER_BLOCK: 15
+  - EPOCH: 419072  # January 7, 2026, 01:01:11am UTC
+    MAX_BLOBS_PER_BLOCK: 21
+
 # Gloas