rename to custody game

README.md

@@ -50,9 +50,9 @@ Sharding follows the merge, and is divided into three parts:
 * Sharding base functionality - In early engineering phase
   * [Beacon Chain changes](specs/sharding/beacon-chain.md)
   * [P2P Network changes](specs/sharding/p2p-interface.md)
-* Proof of Custody - Ready, dependent on sharding 
-  * [Custody Game](specs/proof_of_custody/custody-game.md)
-  * [Validator custody work](specs/proof_of_custody/validator.md)
+* Custody Game - Ready, dependent on sharding 
+  * [Custody Game](specs/custody_game/custody-game.md)
+  * [Validator custody work](specs/custody_game/validator.md)
 * Data Availability Sampling - In active R&D
   * Technical details [here](https://hackmd.io/@HWeNw8hNRimMm2m2GH56Cw/B1YJPGkpD).
   * [Core types and functions](specs/das/das-core.md)

configs/mainnet/custody_game.yaml

@@ -1,4 +1,4 @@
-# Mainnet preset - Proof of Custody
+# Mainnet preset - Custody Game
 
 # Time parameters
 # ---------------------------------------------------------------

configs/minimal/custody_game.yaml

@@ -1,4 +1,4 @@
-# Minimal preset - Proof of Custody
+# Minimal preset - Custody Game
 
 # Time parameters
 # ---------------------------------------------------------------

tests/core/pyspec/eth2spec/test/context.py

@@ -32,7 +32,7 @@ ALTAIR = SpecForkName('altair')
 # Experimental phases (not included in default "ALL_PHASES"):
 MERGE = SpecForkName('merge')
 SHARDING = SpecForkName('sharding')
-PROOF_OF_CUSTODY = SpecForkName('proof_of_custody')
+CUSTODY_GAME = SpecForkName('custody_game')
 DAS = SpecForkName('das')
 
 ALL_PHASES = (PHASE0, ALTAIR)
@@ -357,7 +357,7 @@ def with_phases(phases, other_phases=None):
             if ALTAIR in run_phases:
                 ret = fn(spec=spec_altair, phases=phase_dir, *args, **kw)
 
-            # TODO: merge, sharding, proof_of_custody and das are not executable yet.
+            # TODO: merge, sharding, custody_game and das are not executable yet.
             #  Tests that specify these features will not run, and get ignored for these specific phases.
             return ret
         return wrapper
@@ -383,6 +383,6 @@ def with_configs(configs, reason=None):
 def is_post_altair(spec):
     # TODO: everything runs in parallel to Altair.
     #  After features are rebased on the Altair fork, this can be reduced to just PHASE0.
-    if spec.fork in [PHASE0, MERGE, SHARDING, PROOF_OF_CUSTODY, DAS]:
+    if spec.fork in [PHASE0, MERGE, SHARDING, CUSTODY_GAME, DAS]:
         return False
     return True

tests/core/pyspec/eth2spec/test/custody_game/block_processing/test_process_attestation.py

@@ -1,5 +1,5 @@
 from eth2spec.test.context import (
-    PROOF_OF_CUSTODY,
+    CUSTODY_GAME,
     with_phases,
     spec_state_test,
     always_bls,
@@ -12,7 +12,7 @@ from eth2spec.test.helpers.attestations import (
 )
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @always_bls
 def test_on_time_success(spec, state):
@@ -23,7 +23,7 @@ def test_on_time_success(spec, state):
     yield from run_attestation_processing(spec, state, attestation)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @always_bls
 def test_late_success(spec, state):

tests/core/pyspec/eth2spec/test/custody_game/block_processing/test_process_chunk_challenge.py

@@ -8,7 +8,7 @@ from eth2spec.test.helpers.attestations import (
 )
 from eth2spec.test.helpers.state import transition_to, transition_to_valid_shard_slot
 from eth2spec.test.context import (
-    PROOF_OF_CUSTODY,
+    CUSTODY_GAME,
     MINIMAL,
     expect_assertion_error,
     disable_process_reveal_deadlines,
@@ -68,7 +68,7 @@ def run_custody_chunk_response_processing(spec, state, custody_response, valid=T
     yield 'post', state
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @with_configs([MINIMAL], reason="too slow")
 @disable_process_reveal_deadlines
@@ -92,7 +92,7 @@ def test_challenge_appended(spec, state):
     yield from run_chunk_challenge_processing(spec, state, challenge)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @disable_process_reveal_deadlines
 @with_configs([MINIMAL], reason="too slow")
@@ -118,7 +118,7 @@ def test_challenge_empty_element_replaced(spec, state):
     yield from run_chunk_challenge_processing(spec, state, challenge)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @disable_process_reveal_deadlines
 @with_configs([MINIMAL], reason="too slow")
@@ -144,7 +144,7 @@ def test_duplicate_challenge(spec, state):
     yield from run_chunk_challenge_processing(spec, state, challenge, valid=False)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @disable_process_reveal_deadlines
 @with_configs([MINIMAL], reason="too slow")
@@ -172,7 +172,7 @@ def test_second_challenge(spec, state):
     yield from run_chunk_challenge_processing(spec, state, challenge1)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @disable_process_reveal_deadlines
 @with_configs([MINIMAL], reason="too slow")
@@ -197,7 +197,7 @@ def test_multiple_epochs_custody(spec, state):
     yield from run_chunk_challenge_processing(spec, state, challenge)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @disable_process_reveal_deadlines
 @with_configs([MINIMAL], reason="too slow")
@@ -222,7 +222,7 @@ def test_many_epochs_custody(spec, state):
     yield from run_chunk_challenge_processing(spec, state, challenge)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @disable_process_reveal_deadlines
 @with_configs([MINIMAL], reason="too slow")
@@ -243,7 +243,7 @@ def test_off_chain_attestation(spec, state):
     yield from run_chunk_challenge_processing(spec, state, challenge)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @disable_process_reveal_deadlines
 @with_configs([MINIMAL], reason="too slow")
@@ -275,7 +275,7 @@ def test_custody_response(spec, state):
     yield from run_custody_chunk_response_processing(spec, state, custody_response)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @disable_process_reveal_deadlines
 @with_configs([MINIMAL], reason="too slow")
@@ -306,7 +306,7 @@ def test_custody_response_chunk_index_2(spec, state):
     yield from run_custody_chunk_response_processing(spec, state, custody_response)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @disable_process_reveal_deadlines
 @with_configs([MINIMAL], reason="too slow")
@@ -338,7 +338,7 @@ def test_custody_response_multiple_epochs(spec, state):
     yield from run_custody_chunk_response_processing(spec, state, custody_response)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @disable_process_reveal_deadlines
 @with_configs([MINIMAL], reason="too slow")

tests/core/pyspec/eth2spec/test/custody_game/block_processing/test_process_custody_key_reveal.py

@@ -1,6 +1,6 @@
 from eth2spec.test.helpers.custody import get_valid_custody_key_reveal
 from eth2spec.test.context import (
-    PROOF_OF_CUSTODY,
+    CUSTODY_GAME,
     with_phases,
     spec_state_test,
     expect_assertion_error,
@@ -39,7 +39,7 @@ def run_custody_key_reveal_processing(spec, state, custody_key_reveal, valid=Tru
     yield 'post', state
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @always_bls
 def test_success(spec, state):
@@ -49,7 +49,7 @@ def test_success(spec, state):
     yield from run_custody_key_reveal_processing(spec, state, custody_key_reveal)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @always_bls
 def test_reveal_too_early(spec, state):
@@ -58,7 +58,7 @@ def test_reveal_too_early(spec, state):
     yield from run_custody_key_reveal_processing(spec, state, custody_key_reveal, False)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @always_bls
 def test_wrong_period(spec, state):
@@ -67,7 +67,7 @@ def test_wrong_period(spec, state):
     yield from run_custody_key_reveal_processing(spec, state, custody_key_reveal, False)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @always_bls
 def test_late_reveal(spec, state):
@@ -77,7 +77,7 @@ def test_late_reveal(spec, state):
     yield from run_custody_key_reveal_processing(spec, state, custody_key_reveal)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @always_bls
 def test_double_reveal(spec, state):

tests/core/pyspec/eth2spec/test/custody_game/block_processing/test_process_custody_slashing.py

@@ -10,7 +10,7 @@ from eth2spec.utils.ssz.ssz_typing import ByteList
 from eth2spec.test.helpers.state import get_balance, transition_to
 from eth2spec.test.context import (
     MINIMAL,
-    PROOF_OF_CUSTODY,
+    CUSTODY_GAME,
     with_phases,
     spec_state_test,
     expect_assertion_error,
@@ -112,7 +112,7 @@ def run_standard_custody_slashing_test(spec,
     yield from run_custody_slashing_processing(spec, state, slashing, valid=valid, correct=correct)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @disable_process_reveal_deadlines
 @with_configs([MINIMAL], reason="too slow")
@@ -120,7 +120,7 @@ def test_custody_slashing(spec, state):
     yield from run_standard_custody_slashing_test(spec, state)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @disable_process_reveal_deadlines
 @with_configs([MINIMAL], reason="too slow")
@@ -128,7 +128,7 @@ def test_incorrect_custody_slashing(spec, state):
     yield from run_standard_custody_slashing_test(spec, state, correct=False)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @disable_process_reveal_deadlines
 @with_configs([MINIMAL], reason="too slow")
@@ -136,7 +136,7 @@ def test_multiple_epochs_custody(spec, state):
     yield from run_standard_custody_slashing_test(spec, state, shard_lateness=spec.SLOTS_PER_EPOCH * 3)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @disable_process_reveal_deadlines
 @with_configs([MINIMAL], reason="too slow")
@@ -144,7 +144,7 @@ def test_many_epochs_custody(spec, state):
     yield from run_standard_custody_slashing_test(spec, state, shard_lateness=spec.SLOTS_PER_EPOCH * 5)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @disable_process_reveal_deadlines
 @with_configs([MINIMAL], reason="too slow")

tests/core/pyspec/eth2spec/test/custody_game/block_processing/test_process_early_derived_secret_reveal.py

@@ -1,7 +1,7 @@
 from eth2spec.test.helpers.custody import get_valid_early_derived_secret_reveal
 from eth2spec.test.helpers.state import next_epoch_via_block, get_balance
 from eth2spec.test.context import (
-    PROOF_OF_CUSTODY,
+    CUSTODY_GAME,
     with_phases,
     spec_state_test,
     expect_assertion_error,
@@ -41,7 +41,7 @@ def run_early_derived_secret_reveal_processing(spec, state, randao_key_reveal, v
     yield 'post', state
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @always_bls
 def test_success(spec, state):
@@ -50,7 +50,7 @@ def test_success(spec, state):
     yield from run_early_derived_secret_reveal_processing(spec, state, randao_key_reveal)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @never_bls
 def test_reveal_from_current_epoch(spec, state):
@@ -59,7 +59,7 @@ def test_reveal_from_current_epoch(spec, state):
     yield from run_early_derived_secret_reveal_processing(spec, state, randao_key_reveal, False)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @never_bls
 def test_reveal_from_past_epoch(spec, state):
@@ -69,7 +69,7 @@ def test_reveal_from_past_epoch(spec, state):
     yield from run_early_derived_secret_reveal_processing(spec, state, randao_key_reveal, False)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @always_bls
 def test_reveal_with_custody_padding(spec, state):
@@ -81,7 +81,7 @@ def test_reveal_with_custody_padding(spec, state):
     yield from run_early_derived_secret_reveal_processing(spec, state, randao_key_reveal, True)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @always_bls
 def test_reveal_with_custody_padding_minus_one(spec, state):
@@ -93,7 +93,7 @@ def test_reveal_with_custody_padding_minus_one(spec, state):
     yield from run_early_derived_secret_reveal_processing(spec, state, randao_key_reveal, True)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @never_bls
 def test_double_reveal(spec, state):
@@ -114,7 +114,7 @@ def test_double_reveal(spec, state):
     yield from run_early_derived_secret_reveal_processing(spec, state, randao_key_reveal2, False)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @never_bls
 def test_revealer_is_slashed(spec, state):
@@ -124,7 +124,7 @@ def test_revealer_is_slashed(spec, state):
     yield from run_early_derived_secret_reveal_processing(spec, state, randao_key_reveal, False)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @never_bls
 def test_far_future_epoch(spec, state):

tests/core/pyspec/eth2spec/test/custody_game/epoch_processing/test_process_challenge_deadlines.py

@@ -7,7 +7,7 @@ from eth2spec.test.helpers.attestations import (
 )
 from eth2spec.test.helpers.state import transition_to, transition_to_valid_shard_slot
 from eth2spec.test.context import (
-    PROOF_OF_CUSTODY,
+    CUSTODY_GAME,
     MINIMAL,
     spec_state_test,
     with_phases,
@@ -16,7 +16,7 @@ from eth2spec.test.context import (
 from eth2spec.test.phase0.block_processing.test_process_attestation import run_attestation_processing
 from eth2spec.test.helpers.epoch_processing import run_epoch_processing_with
 
-from eth2spec.test.proof_of_custody.block_processing.test_process_chunk_challenge import (
+from eth2spec.test.custody_game.block_processing.test_process_chunk_challenge import (
     run_chunk_challenge_processing,
 )
 
@@ -25,7 +25,7 @@ def run_process_challenge_deadlines(spec, state):
     yield from run_epoch_processing_with(spec, state, 'process_challenge_deadlines')
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @with_configs([MINIMAL], reason="too slow")
 def test_validator_slashed_after_chunk_challenge(spec, state):

tests/core/pyspec/eth2spec/test/custody_game/epoch_processing/test_process_custody_final_updates.py

@@ -1,5 +1,5 @@
 from eth2spec.test.context import (
-    PROOF_OF_CUSTODY,
+    CUSTODY_GAME,
 )
 from eth2spec.test.helpers.custody import (
     get_valid_chunk_challenge,
@@ -18,11 +18,11 @@ from eth2spec.test.context import (
 from eth2spec.test.phase0.block_processing.test_process_attestation import run_attestation_processing
 from eth2spec.test.helpers.epoch_processing import run_epoch_processing_with
 
-from eth2spec.test.proof_of_custody.block_processing.test_process_chunk_challenge import (
+from eth2spec.test.custody_game.block_processing.test_process_chunk_challenge import (
     run_chunk_challenge_processing,
     run_custody_chunk_response_processing,
 )
-from eth2spec.test.proof_of_custody.block_processing.test_process_custody_key_reveal import (
+from eth2spec.test.custody_game.block_processing.test_process_custody_key_reveal import (
     run_custody_key_reveal_processing,
 )
 
@@ -31,7 +31,7 @@ def run_process_custody_final_updates(spec, state):
     yield from run_epoch_processing_with(spec, state, 'process_custody_final_updates')
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 def test_validator_withdrawal_delay(spec, state):
     transition_to_valid_shard_slot(spec, state)
@@ -44,7 +44,7 @@ def test_validator_withdrawal_delay(spec, state):
     assert state.validators[0].withdrawable_epoch == spec.FAR_FUTURE_EPOCH
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 def test_validator_withdrawal_reenable_after_custody_reveal(spec, state):
     transition_to_valid_shard_slot(spec, state)
@@ -69,7 +69,7 @@ def test_validator_withdrawal_reenable_after_custody_reveal(spec, state):
     assert state.validators[0].withdrawable_epoch < spec.FAR_FUTURE_EPOCH
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 def test_validator_withdrawal_suspend_after_chunk_challenge(spec, state):
     transition_to_valid_shard_slot(spec, state)
@@ -118,7 +118,7 @@ def test_validator_withdrawal_suspend_after_chunk_challenge(spec, state):
     assert state.validators[validator_index].withdrawable_epoch == spec.FAR_FUTURE_EPOCH
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 def test_validator_withdrawal_resume_after_chunk_challenge_response(spec, state):
     transition_to_valid_shard_slot(spec, state)

tests/core/pyspec/eth2spec/test/custody_game/epoch_processing/test_process_reveal_deadlines.py

@@ -3,14 +3,14 @@ from eth2spec.test.helpers.custody import (
 )
 from eth2spec.test.helpers.state import transition_to
 from eth2spec.test.context import (
-    PROOF_OF_CUSTODY,
+    CUSTODY_GAME,
     MINIMAL,
     with_phases,
     with_configs,
     spec_state_test,
 )
 from eth2spec.test.helpers.epoch_processing import run_epoch_processing_with
-from eth2spec.test.proof_of_custody.block_processing.test_process_custody_key_reveal import (
+from eth2spec.test.custody_game.block_processing.test_process_custody_key_reveal import (
     run_custody_key_reveal_processing,
 )
 
@@ -19,7 +19,7 @@ def run_process_challenge_deadlines(spec, state):
     yield from run_epoch_processing_with(spec, state, 'process_challenge_deadlines')
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @with_configs([MINIMAL], reason="too slow")
 def test_validator_slashed_after_reveal_deadline(spec, state):
@@ -39,7 +39,7 @@ def test_validator_slashed_after_reveal_deadline(spec, state):
     assert state.validators[0].slashed == 1
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @with_configs([MINIMAL], reason="too slow")
 def test_validator_not_slashed_after_reveal(spec, state):

tests/core/pyspec/eth2spec/test/custody_game/sanity/test_blocks.py

@@ -1,7 +1,7 @@
 from typing import Dict, Sequence
 
 from eth2spec.test.context import (
-    PROOF_OF_CUSTODY,
+    CUSTODY_GAME,
     MINIMAL,
     with_phases,
     spec_state_test,
@@ -46,7 +46,7 @@ def run_beacon_block(spec, state, block, valid=True):
 #
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 def test_with_shard_transition_with_custody_challenge_and_response(spec, state):
     transition_to_valid_shard_slot(spec, state)
@@ -79,7 +79,7 @@ def test_with_shard_transition_with_custody_challenge_and_response(spec, state):
     yield from run_beacon_block(spec, state, block)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 @with_configs([MINIMAL])
 def test_custody_key_reveal(spec, state):
@@ -93,7 +93,7 @@ def test_custody_key_reveal(spec, state):
     yield from run_beacon_block(spec, state, block)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 def test_early_derived_secret_reveal(spec, state):
     transition_to_valid_shard_slot(spec, state)
@@ -104,7 +104,7 @@ def test_early_derived_secret_reveal(spec, state):
     yield from run_beacon_block(spec, state, block)
 
 
-@with_phases([PROOF_OF_CUSTODY])
+@with_phases([CUSTODY_GAME])
 @spec_state_test
 def test_custody_slashing(spec, state):
     transition_to_valid_shard_slot(spec, state)

tests/core/pyspec/eth2spec/test/helpers/block_processing.py

@@ -30,7 +30,7 @@ def get_process_calls(spec):
         # Merge
         'process_application_payload':
             lambda state, block: spec.process_application_payload(state, block.body),
-        # Proof of custody
+        # Custody Game
         'process_custody_game_operations':
             lambda state, block: spec.process_custody_game_operations(state, block.body),
     }

tests/core/pyspec/eth2spec/test/helpers/epoch_processing.py

@@ -11,8 +11,8 @@ def get_process_calls(spec):
         'process_justification_and_finalization',
         'process_rewards_and_penalties',
         'process_registry_updates',
-        'process_reveal_deadlines',  # proof of custody
-        'process_challenge_deadlines',  # proof of custody
+        'process_reveal_deadlines',  # custody game
+        'process_challenge_deadlines',  # custody game
         'process_slashings',
         'process_pending_header.',  # sharding
         'charge_confirmed_header_fees',  # sharding