Runtime rpc request sizes (#4841)

* add runtime variable list type

* add configs to ChainSpec

* git rid of max request blocks type

* fix tests and lints

* remove todos

* git rid of old const usage

* fix decode impl

* add new config to `Config` api struct

* add docs fix compilt

* move methods for per-fork-spec to chainspec

* get values off chain spec

* fix compile

* remove min by root size

* add tests for runtime var list

---------

Co-authored-by: Jimmy Chen <jchen.tc@gmail.com>

beacon_node/lighthouse_network/src/service/mod.rs

@@ -41,8 +41,7 @@ use std::{
 };
 use types::ForkName;
 use types::{
-    consts::altair::SYNC_COMMITTEE_SUBNET_COUNT, consts::deneb::BLOB_SIDECAR_SUBNET_COUNT,
-    EnrForkId, EthSpec, ForkContext, Slot, SubnetId,
+    consts::altair::SYNC_COMMITTEE_SUBNET_COUNT, EnrForkId, EthSpec, ForkContext, Slot, SubnetId,
 };
 use utils::{build_transport, strip_peer_id, Context as ServiceContext, MAX_CONNECTIONS_PER_PEER};
 
@@ -226,7 +225,7 @@ impl<AppReqId: ReqId, TSpec: EthSpec> Network<AppReqId, TSpec> {
 
             let max_topics = ctx.chain_spec.attestation_subnet_count as usize
                 + SYNC_COMMITTEE_SUBNET_COUNT as usize
-                + BLOB_SIDECAR_SUBNET_COUNT as usize
+                + ctx.chain_spec.blob_sidecar_subnet_count as usize
                 + BASE_CORE_TOPICS.len()
                 + ALTAIR_CORE_TOPICS.len()
                 + CAPELLA_CORE_TOPICS.len()
@@ -239,7 +238,7 @@ impl<AppReqId: ReqId, TSpec: EthSpec> Network<AppReqId, TSpec> {
                     possible_fork_digests,
                     ctx.chain_spec.attestation_subnet_count,
                     SYNC_COMMITTEE_SUBNET_COUNT,
-                    BLOB_SIDECAR_SUBNET_COUNT,
+                    ctx.chain_spec.blob_sidecar_subnet_count,
                 ),
                 // during a fork we subscribe to both the old and new topics
                 max_subscribed_topics: max_topics * 4,
@@ -639,7 +638,7 @@ impl<AppReqId: ReqId, TSpec: EthSpec> Network<AppReqId, TSpec> {
         }
 
         // Subscribe to core topics for the new fork
-        for kind in fork_core_topics::<TSpec>(&new_fork) {
+        for kind in fork_core_topics::<TSpec>(&new_fork, &self.fork_context.spec) {
             let topic = GossipTopic::new(kind, GossipEncoding::default(), new_fork_digest);
             self.subscribe(topic);
         }