Add Deneb fork epoch for Gnosis (#5242)

Squashed commit of the following:

commit 1422de9
Author: Paul Hauner <[email protected]>
Date:   Fri Feb 16 20:44:04 2024 +1100

    Fix chain spec values again

commit d61d53b
Author: Paul Hauner <[email protected]>
Date:   Fri Feb 16 20:25:43 2024 +1100

    Fix chain spec `max_per_epoch_activation_churn_limit`

commit 32b349e
Author: Paul Hauner <[email protected]>
Date:   Fri Feb 16 20:08:24 2024 +1100

    Change `MAX_PER_EPOCH_ACTIVATION_CHURN_LIMIT`

commit 8548506
Author: Paul Hauner <[email protected]>
Date:   Fri Feb 16 20:01:37 2024 +1100

    Adjust `min_epochs_for_block_requests`

commit 3305c10
Author: Paul Hauner <[email protected]>
Date:   Fri Feb 16 19:59:43 2024 +1100

    Update common/eth2_network_config/built_in_network_configs/gnosis/config.yaml

    Co-authored-by: realbigsean <[email protected]>

commit ca10127
Author: Paul Hauner <[email protected]>
Date:   Thu Feb 15 19:09:50 2024 +1100

    Add deneb constants

commit 94285cf
Author: Paul Hauner <[email protected]>
Date:   Thu Feb 15 19:06:32 2024 +1100

    Add Deneb fork epoch for Gnosis

common/eth2_network_config/built_in_network_configs/gnosis/config.yaml

@@ -41,7 +41,7 @@ CAPELLA_FORK_VERSION: 0x03000064
 CAPELLA_FORK_EPOCH: 648704
 # Deneb
 DENEB_FORK_VERSION: 0x04000064
-DENEB_FORK_EPOCH: 18446744073709551615
+DENEB_FORK_EPOCH: 889856 # 2024-03-11T18:30:20.000Z
 # Sharding
 SHARDING_FORK_VERSION: 0x03000064
 SHARDING_FORK_EPOCH: 18446744073709551615
@@ -75,7 +75,7 @@ EJECTION_BALANCE: 16000000000
 # 2**2 (= 4)
 MIN_PER_EPOCH_CHURN_LIMIT: 4
 # 2**3 (= 8)
-MAX_PER_EPOCH_ACTIVATION_CHURN_LIMIT: 8
+MAX_PER_EPOCH_ACTIVATION_CHURN_LIMIT: 2
 # 2**12 (= 4096)
 CHURN_LIMIT_QUOTIENT: 4096
 
@@ -106,3 +106,13 @@ ATTESTATION_SUBNET_COUNT: 64
 ATTESTATION_SUBNET_EXTRA_BITS: 0
 ATTESTATION_SUBNET_PREFIX_BITS: 6
 ATTESTATION_SUBNET_SHUFFLING_PREFIX_BITS: 3
+
+# Deneb
+# `2**7` (=128)
+MAX_REQUEST_BLOCKS_DENEB: 128
+# MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK
+MAX_REQUEST_BLOB_SIDECARS: 768
+# `2**14` (= 16384 epochs, ~15 days)
+MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS: 16384
+# `6`
+BLOB_SIDECAR_SUBNET_COUNT: 6

consensus/types/src/chain_spec.rs

@@ -809,7 +809,7 @@ impl ChainSpec {
             max_committees_per_slot: 64,
             target_committee_size: 128,
             min_per_epoch_churn_limit: 4,
-            max_per_epoch_activation_churn_limit: 8,
+            max_per_epoch_activation_churn_limit: 2,
             churn_limit_quotient: 4_096,
             shuffle_round_count: 90,
             min_genesis_active_validator_count: 4_096,
@@ -944,7 +944,7 @@ impl ChainSpec {
              * Deneb hard fork params
              */
             deneb_fork_version: [0x04, 0x00, 0x00, 0x64],
-            deneb_fork_epoch: None,
+            deneb_fork_epoch: Some(Epoch::new(889856)),
 
             /*
              * Network specific
@@ -958,7 +958,7 @@ impl ChainSpec {
             target_aggregators_per_committee: 16,
             epochs_per_subnet_subscription: default_epochs_per_subnet_subscription(),
             gossip_max_size: default_gossip_max_size(),
-            min_epochs_for_block_requests: default_min_epochs_for_block_requests(),
+            min_epochs_for_block_requests: 33024,
             max_chunk_size: default_max_chunk_size(),
             ttfb_timeout: default_ttfb_timeout(),
             resp_timeout: default_resp_timeout(),
@@ -975,7 +975,7 @@ impl ChainSpec {
              */
             max_request_blocks_deneb: default_max_request_blocks_deneb(),
             max_request_blob_sidecars: default_max_request_blob_sidecars(),
-            min_epochs_for_blob_sidecars_requests: default_min_epochs_for_blob_sidecars_requests(),
+            min_epochs_for_blob_sidecars_requests: 16384,
             blob_sidecar_subnet_count: default_blob_sidecar_subnet_count(),
 
             /*