Mainnet Electra fork epoch (#7275)

#6918

See eth-clients/mainnet#4

Author: eserilev

common/eth2_network_config/built_in_network_configs/mainnet/config.yaml

@@ -49,7 +49,7 @@ DENEB_FORK_VERSION: 0x04000000
 DENEB_FORK_EPOCH: 269568 # March 13, 2024, 01:55:35pm UTC
 # Electra
 ELECTRA_FORK_VERSION: 0x05000000
-ELECTRA_FORK_EPOCH: 18446744073709551615
+ELECTRA_FORK_EPOCH: 364032 # May 7, 2025, 10:05:11am UTC
 # Fulu
 FULU_FORK_VERSION: 0x06000000
 FULU_FORK_EPOCH: 18446744073709551615
@@ -142,6 +142,18 @@ BLOB_SIDECAR_SUBNET_COUNT: 6
 # `uint64(6)`
 MAX_BLOBS_PER_BLOCK: 6
 
+# Electra
+# 2**7 * 10**9 (= 128,000,000,000)
+MIN_PER_EPOCH_CHURN_LIMIT_ELECTRA: 128000000000
+# 2**8 * 10**9 (= 256,000,000,000)
+MAX_PER_EPOCH_ACTIVATION_EXIT_CHURN_LIMIT: 256000000000
+# `9`
+BLOB_SIDECAR_SUBNET_COUNT_ELECTRA: 9
+# `uint64(9)`
+MAX_BLOBS_PER_BLOCK_ELECTRA: 9
+# MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_ELECTRA
+MAX_REQUEST_BLOB_SIDECARS_ELECTRA: 1152
+
 # DAS
 NUMBER_OF_COLUMNS: 128
 NUMBER_OF_CUSTODY_GROUPS: 128

consensus/types/src/chain_spec.rs

@@ -879,7 +879,7 @@ impl ChainSpec {
              * Electra hard fork params
              */
             electra_fork_version: [0x05, 00, 00, 00],
-            electra_fork_epoch: None,
+            electra_fork_epoch: Some(Epoch::new(364032)),
             unset_deposit_requests_start_index: u64::MAX,
             full_exit_request_amount: 0,
             min_activation_balance: option_wrapper(|| {