ethereum · djrtwo · May 18, 2021 · May 14, 2021 · May 17, 2021 · May 17, 2021
diff --git a/configs/mainnet/sharding.yaml b/configs/mainnet/sharding.yaml
@@ -34,11 +34,6 @@ MAX_GASPRICE: 8589934592
 # 2**3 (= 8) Gwei
 MIN_GASPRICE: 8
 
-# Time parameters
-# ---------------------------------------------------------------
-# 2**8 (= 256) | epochs
-SHARD_COMMITTEE_PERIOD: 256
-
 # Signature domains
 # ---------------------------------------------------------------
 DOMAIN_SHARD_PROPOSER: 0x80000000

diff --git a/configs/minimal/sharding.yaml b/configs/minimal/sharding.yaml
@@ -4,7 +4,7 @@
 # ---------------------------------------------------------------
 SHARDING_FORK_VERSION: 0x03000001
 # TBD, temporarily max uint64 value: 2**64 - 1
-MERGE_FORK_EPOCH: 18446744073709551615
+SHARDING_FORK_EPOCH: 18446744073709551615
 
 
 # Beacon-chain
@@ -34,11 +34,6 @@ MAX_GASPRICE: 8589934592
 # 2**3 (= 8) Gwei
 MIN_GASPRICE: 8
 
-# Time parameters
-# ---------------------------------------------------------------
-# 2**8 (= 256) | epochs
-SHARD_COMMITTEE_PERIOD: 256
-
 # Signature domains
 # ---------------------------------------------------------------
 DOMAIN_SHARD_PROPOSER: 0x80000000

diff --git a/specs/altair/beacon-chain.md b/specs/altair/beacon-chain.md
@@ -99,7 +99,7 @@ Altair is the first beacon chain hard fork. Its main features are:
 | Name | Value |
 | - | - |
 | `G2_POINT_AT_INFINITY` | `BLSSignature(b'\xc0' + b'\x00' * 95)` |
-| `PARTICIPATION_FLAG_WEIGHTS` | `[TIMELY_SOURCE_WEIGHT, TIMELY_TARGET_WEIGHT, TIMELY_HEAD_FLAG_INDEX]` |
+| `PARTICIPATION_FLAG_WEIGHTS` | `[TIMELY_SOURCE_WEIGHT, TIMELY_TARGET_WEIGHT, TIMELY_HEAD_WEIGHT]` |
 
 ## Configuration
 

diff --git a/specs/altair/fork.md b/specs/altair/fork.md
@@ -41,8 +41,8 @@ Note that for the pure Altair networks, we don't apply `upgrade_to_altair` since
 If `state.slot % SLOTS_PER_EPOCH == 0` and `compute_epoch_at_slot(state.slot) == ALTAIR_FORK_EPOCH`, an irregular state change is made to upgrade to Altair.
 
 The upgrade occurs after the completion of the inner loop of `process_slots` that sets `state.slot` equal to `ALTAIR_FORK_EPOCH * SLOTS_PER_EPOCH`.
-Care must be taken when transitioning through the fork boundary as implementations will need a modified state transition function that deviates from the Phase 0 spec.
-In particular, the outer `state_transition` function defined in the Phase 0 spec will not expose the precise fork slot to execute the upgrade in the presence of skipped slots at the fork boundary. Instead the logic must be within `process_slots`.
+Care must be taken when transitioning through the fork boundary as implementations will need a modified [state transition function](../phase0/beacon-chain.md#beacon-chain-state-transition-function) that deviates from the Phase 0 document.
+In particular, the outer `state_transition` function defined in the Phase 0 document will not expose the precise fork slot to execute the upgrade in the presence of skipped slots at the fork boundary. Instead the logic must be within `process_slots`.
 
 ```python
 def translate_participation(state: BeaconState, pending_attestations: Sequence[phase0.PendingAttestation]) -> None:

diff --git a/specs/sharding/beacon-chain.md b/specs/sharding/beacon-chain.md
@@ -16,7 +16,6 @@
   - [Shard block configs](#shard-block-configs)
   - [Precomputed size verification points](#precomputed-size-verification-points)
   - [Gwei values](#gwei-values)
-  - [Time parameters](#time-parameters)
   - [Domain types](#domain-types)
 - [Updated containers](#updated-containers)
   - [`AttestationData`](#attestationdata)
@@ -123,12 +122,6 @@ The following values are (non-configurable) constants used throughout the specif
 | `MAX_GASPRICE` | `Gwei(2**33)` (= 8,589,934,592) | Gwei | Max gasprice charged for a TARGET-sized shard block |  
 | `MIN_GASPRICE` | `Gwei(2**3)` (= 8) | Gwei | Min gasprice charged for a TARGET-sized shard block |
 
-### Time parameters
-
-| Name | Value | Unit | Duration |
-| - | - | :-: | :-: |
-| `SHARD_COMMITTEE_PERIOD` | `Epoch(2**8)` (= 256) | epochs | ~27 hours |
-
 ### Domain types
 
 | Name | Value |
@@ -466,7 +459,9 @@ def process_block(state: BeaconState, block: BeaconBlock) -> None:
     process_randao(state, block.body)
     process_eth1_data(state, block.body)
     process_operations(state, block.body)  # [Modified in Sharding]
-    process_execution_payload(state, block.body)  # [New in Merge]
+    # Pre-merge, skip execution payload processing
+    if is_execution_enabled(state, block):
+        process_execution_payload(state, block.body.execution_payload, EXECUTION_ENGINE)  # [New in Merge]
 ```
 
 #### Operations
@@ -760,8 +755,9 @@ def reset_pending_headers(state: BeaconState) -> None:
     # Add dummy "empty" PendingShardHeader (default vote for if no shard header available)
     next_epoch = get_current_epoch(state) + 1
     next_epoch_start_slot = compute_start_slot_at_epoch(next_epoch)
+    committees_per_slot = get_committee_count_per_slot(state, next_epoch)
     for slot in range(next_epoch_start_slot, next_epoch_start_slot + SLOTS_PER_EPOCH):
-        for index in range(get_committee_count_per_slot(state, next_epoch)):
+        for index in range(committees_per_slot):
             committee_index = CommitteeIndex(index)
             shard = compute_shard_from_committee_index(state, slot, committee_index)
             committee_length = len(get_beacon_committee(state, slot, committee_index))

diff --git a/tests/core/pyspec/eth2spec/VERSION.txt b/tests/core/pyspec/eth2spec/VERSION.txt
@@ -1 +1 @@
-1.1.0-alpha.4
+1.1.0-alpha.5