refactor engine API conversions out of EL manager

AllTests-mainnet.md

@@ -464,16 +464,20 @@ OK: 5/5 Fail: 0/5 Skip: 0/5
 + URL parsing                                                                                OK
 ```
 OK: 5/5 Fail: 0/5 Skip: 0/5
-## Eth1 monitor
+## Engine API conversions
 ```diff
-+ Deposits chain                                                                             OK
-+ Rewrite URLs                                                                               OK
 + Roundtrip engine RPC V1 and bellatrix ExecutionPayload representations                     OK
 + Roundtrip engine RPC V2 and capella ExecutionPayload representations                       OK
 + Roundtrip engine RPC V3 and deneb ExecutionPayload representations                         OK
 + Roundtrip engine RPC V4 and electra ExecutionPayload representations                       OK
 ```
-OK: 6/6 Fail: 0/6 Skip: 0/6
+OK: 4/4 Fail: 0/4 Skip: 0/4
+## Eth1 monitor
+```diff
++ Deposits chain                                                                             OK
++ Rewrite URLs                                                                               OK
+```
+OK: 2/2 Fail: 0/2 Skip: 0/2
 ## Eth2 specific discovery tests
 ```diff
 + Invalid attnets field                                                                      OK

beacon_chain/consensus_object_pools/consensus_manager.nim

@@ -15,6 +15,7 @@ import
   ../beacon_clock,
   ./common_tools
 
+from ../el/engine_api_conversions import asBlockHash
 from ../spec/beaconstate import
   get_expected_withdrawals, has_eth1_withdrawal_credential
 from ../spec/datatypes/capella import Withdrawal

beacon_chain/el/eth1_chain.nim

@@ -16,6 +16,8 @@ import
   web3/[conversions, eth_api_types],
   ./merkle_minimal
 
+from ./engine_api_conversions import asBlockHash, asEth2Digest
+
 export beacon_chain_db, deques, digest, base, forks
 
 logScope:
@@ -80,12 +82,6 @@ type
     deposits*: seq[Deposit]
     hasMissingDeposits*: bool
 
-func asEth2Digest*(x: BlockHash): Eth2Digest =
-  Eth2Digest(data: array[32, byte](x))
-
-template asBlockHash*(x: Eth2Digest): BlockHash =
-  BlockHash(x.data)
-
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/validator.md#get_eth1_data
 func compute_time_at_slot(genesis_time: uint64, slot: Slot): uint64 =
   genesis_time + slot * SECONDS_PER_SLOT
@@ -115,7 +111,7 @@ template findBlock(chain: Eth1Chain, eth1Data: Eth1Data): Eth1Block =
 
 func makeSuccessorWithoutDeposits*(existingBlock: Eth1Block,
                                    successor: BlockObject): Eth1Block =
-  result = Eth1Block(
+  Eth1Block(
     hash: successor.hash.asEth2Digest,
     number: Eth1BlockNumber successor.number,
     timestamp: Eth1BlockTimestamp successor.timestamp)

beacon_chain/libnimbus_lc/libnimbus_lc.nim

@@ -17,7 +17,7 @@ import
   json_rpc/jsonmarshal,
   secp256k1,
   web3/[engine_api_types, eth_api_types, conversions],
-  ../el/eth1_chain,
+  ../el/[engine_api_conversions, eth1_chain],
   ../spec/eth2_apis/[eth2_rest_serialization, rest_light_client_calls],
   ../spec/[helpers, light_client_sync],
   ../sync/light_client_sync_helpers,

ncli/ncli_testnet.nim

@@ -24,6 +24,7 @@ import
 from std/os import changeFileExt, fileExists
 from std/sequtils import mapIt, toSeq
 from std/times import toUnix
+from ../beacon_chain/el/engine_api_conversions import asEth2Digest
 from ../beacon_chain/spec/beaconstate import initialize_beacon_state_from_eth1
 from ../tests/mocking/mock_genesis import mockEth1BlockHash
 
@@ -721,4 +722,4 @@ when isMainModule:
       # This is handled above before the case statement
       discard
 
-  waitFor main()
+  waitFor main()

tests/all_tests.nim

@@ -25,6 +25,7 @@ import # Unit test
   ./test_datatypes,
   ./test_deposit_snapshots,
   ./test_discovery,
+  ./test_engine_api_conversions,
   ./test_engine_authentication,
   ./test_el_manager,
   ./test_el_conf,