Rework block processing (#4092)

* introduce availability pending block

* add intoavailableblock trait

* small fixes

* add 'gossip blob cache' and start to clean up processing and transition types

* shard memory blob cache

* Initial commit

* Fix after rebase

* Add gossip verification conditions

* cache cleanup

* general chaos

* extended chaos

* cargo fmt

* more progress

* more progress

* tons of changes, just tryna compile

* everything, everywhere, all at once

* Reprocess an ExecutedBlock on unavailable blobs

* Add sus gossip verification for blobs

* Merge stuff

* Remove reprocessing cache stuff

* lint

* Add a wrapper to allow construction of only valid `AvailableBlock`s

* rename blob arc list to blob list

* merge cleanuo

* Revert "merge cleanuo"

This reverts commit 5e98326878.

* Revert "Revert "merge cleanuo""

This reverts commit 3a4009443a.

* fix rpc methods

* move beacon block and blob to eth2/types

* rename gossip blob cache to data availability checker

* lots of changes

* fix some compilation issues

* fix compilation issues

* fix compilation issues

* fix compilation issues

* fix compilation issues

* fix compilation issues

* cargo fmt

* use a common data structure for block import types

* fix availability check on proposal import

* refactor the blob cache and split the block wrapper into two types

* add type conversion for signed block and block wrapper

* fix beacon chain tests and do some renaming, add some comments

* Partial processing (#4)

* move beacon block and blob to eth2/types

* rename gossip blob cache to data availability checker

* lots of changes

* fix some compilation issues

* fix compilation issues

* fix compilation issues

* fix compilation issues

* fix compilation issues

* fix compilation issues

* cargo fmt

* use a common data structure for block import types

* fix availability check on proposal import

* refactor the blob cache and split the block wrapper into two types

* add type conversion for signed block and block wrapper

* fix beacon chain tests and do some renaming, add some comments

* cargo update (#6)

---------

Co-authored-by: realbigsean <sean@sigmaprime.io>
Co-authored-by: realbigsean <seananderson33@gmail.com>

beacon_node/beacon_chain/src/early_attester_cache.rs

@@ -1,4 +1,4 @@
-use crate::blob_verification::AvailableBlock;
+use crate::data_availability_checker::AvailableBlock;
 use crate::{
     attester_cache::{CommitteeLengths, Error},
     metrics,
@@ -6,6 +6,7 @@ use crate::{
 use parking_lot::RwLock;
 use proto_array::Block as ProtoBlock;
 use std::sync::Arc;
+use types::blob_sidecar::BlobSidecarList;
 use types::*;
 
 pub struct CacheItem<E: EthSpec> {
@@ -21,6 +22,7 @@ pub struct CacheItem<E: EthSpec> {
      * Values used to make the block available.
      */
     block: Arc<SignedBeaconBlock<E>>,
+    //TODO(sean) remove this and just use the da checker?'
     blobs: Option<BlobSidecarList<E>>,
     proto_block: ProtoBlock,
 }