decouple eth2 from store and lighthouse_network (#6680)

- #6452 (partially)


  Remove dependencies on `store` and `lighthouse_network`  from `eth2`. This was achieved as follows:

- depend on `enr` and `multiaddr` directly instead of using `lighthouse_network`'s reexports.
- make `lighthouse_network` responsible for converting between API and internal types.
- in two cases, remove complex internal types and use the generic `serde_json::Value` instead - this is not ideal, but should be fine for now, as this affects two internal non-spec endpoints which are meant for debugging, unstable, and subject to change without notice anyway. Inspired by #6679. The alternative is to move all relevant types to `eth2` or `types` instead - what do you think?

common/eth2/src/lighthouse.rs

@@ -1,52 +1,33 @@
 //! This module contains endpoints that are non-standard and only available on Lighthouse servers.
 
 mod attestation_performance;
-pub mod attestation_rewards;
 mod block_packing_efficiency;
 mod block_rewards;
-mod standard_block_rewards;
-mod sync_committee_rewards;
+pub mod sync_state;
 
 use crate::{
-    types::{
-        DepositTreeSnapshot, Epoch, EthSpec, FinalizedExecutionBlock, GenericResponse, ValidatorId,
-    },
+    lighthouse::sync_state::SyncState,
+    types::{DepositTreeSnapshot, Epoch, FinalizedExecutionBlock, GenericResponse, ValidatorId},
     BeaconNodeHttpClient, DepositData, Error, Eth1Data, Hash256, Slot,
 };
 use proto_array::core::ProtoArray;
 use serde::{Deserialize, Serialize};
 use ssz::four_byte_option_impl;
 use ssz_derive::{Decode, Encode};
-use store::{AnchorInfo, BlobInfo, Split, StoreConfig};
 
 pub use attestation_performance::{
     AttestationPerformance, AttestationPerformanceQuery, AttestationPerformanceStatistics,
 };
-pub use attestation_rewards::StandardAttestationRewards;
 pub use block_packing_efficiency::{
     BlockPackingEfficiency, BlockPackingEfficiencyQuery, ProposerInfo, UniqueAttestation,
 };
 pub use block_rewards::{AttestationRewards, BlockReward, BlockRewardMeta, BlockRewardsQuery};
-pub use lighthouse_network::{types::SyncState, PeerInfo};
-pub use standard_block_rewards::StandardBlockReward;
-pub use sync_committee_rewards::SyncCommitteeReward;
 
 // Define "legacy" implementations of `Option<T>` which use four bytes for encoding the union
 // selector.
 four_byte_option_impl!(four_byte_option_u64, u64);
 four_byte_option_impl!(four_byte_option_hash256, Hash256);
 
-/// Information returned by `peers` and `connected_peers`.
-// TODO: this should be deserializable..
-#[derive(Debug, Clone, Serialize)]
-#[serde(bound = "E: EthSpec")]
-pub struct Peer<E: EthSpec> {
-    /// The Peer's ID
-    pub peer_id: String,
-    /// The PeerInfo associated with the peer.
-    pub peer_info: PeerInfo<E>,
-}
-
 /// The results of validators voting during an epoch.
 ///
 /// Provides information about the current and previous epochs.
@@ -234,15 +215,6 @@ impl From<Eth1Block> for FinalizedExecutionBlock {
     }
 }
 
-#[derive(Debug, Serialize, Deserialize)]
-pub struct DatabaseInfo {
-    pub schema_version: u64,
-    pub config: StoreConfig,
-    pub split: Split,
-    pub anchor: AnchorInfo,
-    pub blob_info: BlobInfo,
-}
-
 impl BeaconNodeHttpClient {
     /// `GET lighthouse/health`
     pub async fn get_lighthouse_health(&self) -> Result<GenericResponse<Health>, Error> {
@@ -380,19 +352,6 @@ impl BeaconNodeHttpClient {
         self.get_opt::<(), _>(path).await.map(|opt| opt.is_some())
     }
 
-    /// `GET lighthouse/database/info`
-    pub async fn get_lighthouse_database_info(&self) -> Result<DatabaseInfo, Error> {
-        let mut path = self.server.full.clone();
-
-        path.path_segments_mut()
-            .map_err(|()| Error::InvalidUrl(self.server.clone()))?
-            .push("lighthouse")
-            .push("database")
-            .push("info");
-
-        self.get(path).await
-    }
-
     /// `POST lighthouse/database/reconstruct`
     pub async fn post_lighthouse_database_reconstruct(&self) -> Result<String, Error> {
         let mut path = self.server.full.clone();