2019-05-27 12:48:13 +00:00
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# beacon_chain
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# Copyright (c) 2018-2019 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at http://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at http://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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# This file contains constants that are part of the spec and thus subject to
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# serialization and spec updates.
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import
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# Standard library
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math,
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# Third-party
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eth/common,
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# Internals
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../crypto, ../digest
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type
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Slot* = distinct uint64
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Epoch* = distinct uint64
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{.experimental: "codeReordering".} # SLOTS_PER_EPOCH is use before being defined in spec
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2019-06-14 16:21:04 +00:00
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# https://github.com/ethereum/eth2.0-specs/blob/v0.7.0/configs/constant_presets/minimal.yaml
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2019-05-27 12:48:13 +00:00
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const
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# Misc
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# ---------------------------------------------------------------
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0.7.0 updates which don't change semantics; mostly comment changes (#281)
* 0.7.0 updates which don't change semantics; mostly comment changes
* mark get_attesting_indices, bls_verify, ProposerSlashing, BeaconBlockBody, deposit contract constants, state list length constants, compute_committee, get_crosslink_committee, is_slashable_attestation_data, processAttesterSlashings as 0.7.0; rename BASE_REWARD_QUOTIENT to BASE_REWARD_FACTOR
* complete marking unchanged-in-0.7.0 datatypes as such; a few more have trivial field renamings, etc
2019-06-13 07:40:58 +00:00
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# https://github.com/ethereum/eth2.0-specs/blob/v0.7.0/specs/core/0_beacon-chain.md#misc
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2019-05-27 12:48:13 +00:00
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# Changed
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SHARD_COUNT* {.intdefine.} = 8
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TARGET_COMMITTEE_SIZE* = 4
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# Unchanged
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MAX_INDICES_PER_ATTESTATION* = 4096
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MIN_PER_EPOCH_CHURN_LIMIT* = 4
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CHURN_LIMIT_QUOTIENT* = 2^16
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BASE_REWARDS_PER_EPOCH* = 5
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# Changed
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SHUFFLE_ROUND_COUNT* = 10
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# Deposit contract
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# ---------------------------------------------------------------
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0.7.0 updates which don't change semantics; mostly comment changes (#281)
* 0.7.0 updates which don't change semantics; mostly comment changes
* mark get_attesting_indices, bls_verify, ProposerSlashing, BeaconBlockBody, deposit contract constants, state list length constants, compute_committee, get_crosslink_committee, is_slashable_attestation_data, processAttesterSlashings as 0.7.0; rename BASE_REWARD_QUOTIENT to BASE_REWARD_FACTOR
* complete marking unchanged-in-0.7.0 datatypes as such; a few more have trivial field renamings, etc
2019-06-13 07:40:58 +00:00
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# https://github.com/ethereum/eth2.0-specs/blob/v0.7.0/specs/core/0_beacon-chain.md#deposit-contract
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2019-05-27 12:48:13 +00:00
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# Unchanged
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DEPOSIT_CONTRACT_TREE_DEPTH* = 32
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# Gwei values
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# ---------------------------------------------------------------
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0.7.0 updates which don't change semantics; mostly comment changes (#281)
* 0.7.0 updates which don't change semantics; mostly comment changes
* mark get_attesting_indices, bls_verify, ProposerSlashing, BeaconBlockBody, deposit contract constants, state list length constants, compute_committee, get_crosslink_committee, is_slashable_attestation_data, processAttesterSlashings as 0.7.0; rename BASE_REWARD_QUOTIENT to BASE_REWARD_FACTOR
* complete marking unchanged-in-0.7.0 datatypes as such; a few more have trivial field renamings, etc
2019-06-13 07:40:58 +00:00
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# https://github.com/ethereum/eth2.0-specs/blob/v0.7.0/specs/core/0_beacon-chain.md#gwei-values
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2019-05-27 12:48:13 +00:00
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# Unchanged
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MIN_DEPOSIT_AMOUNT* = 2'u64^0 * 10'u64^9
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MAX_EFFECTIVE_BALANCE* = 2'u64^5 * 10'u64^9
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EJECTION_BALANCE* = 2'u64^4 * 10'u64^9
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EFFECTIVE_BALANCE_INCREMENT* = 2'u64^0 * 10'u64^9
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# Initial values
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# ---------------------------------------------------------------
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0.7.0 updates which don't change semantics; mostly comment changes (#281)
* 0.7.0 updates which don't change semantics; mostly comment changes
* mark get_attesting_indices, bls_verify, ProposerSlashing, BeaconBlockBody, deposit contract constants, state list length constants, compute_committee, get_crosslink_committee, is_slashable_attestation_data, processAttesterSlashings as 0.7.0; rename BASE_REWARD_QUOTIENT to BASE_REWARD_FACTOR
* complete marking unchanged-in-0.7.0 datatypes as such; a few more have trivial field renamings, etc
2019-06-13 07:40:58 +00:00
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# https://github.com/ethereum/eth2.0-specs/blob/v0.7.0/configs/constant_presets/minimal.yaml#L43
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2019-05-27 12:48:13 +00:00
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# Unchanged
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GENESIS_FORK_VERSION* = [0'u8, 0'u8, 0'u8, 0'u8]
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2019-06-12 07:48:49 +00:00
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GENESIS_SLOT* = 0.Slot
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2019-05-27 12:48:13 +00:00
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FAR_FUTURE_EPOCH* = (not 0'u64).Epoch # 2^64 - 1 in spec
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2019-06-14 16:21:04 +00:00
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BLS_WITHDRAWAL_PREFIX* = 0'u8
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2019-05-27 12:48:13 +00:00
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# Time parameters
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# ---------------------------------------------------------------
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0.7.0 updates which don't change semantics; mostly comment changes (#281)
* 0.7.0 updates which don't change semantics; mostly comment changes
* mark get_attesting_indices, bls_verify, ProposerSlashing, BeaconBlockBody, deposit contract constants, state list length constants, compute_committee, get_crosslink_committee, is_slashable_attestation_data, processAttesterSlashings as 0.7.0; rename BASE_REWARD_QUOTIENT to BASE_REWARD_FACTOR
* complete marking unchanged-in-0.7.0 datatypes as such; a few more have trivial field renamings, etc
2019-06-13 07:40:58 +00:00
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# https://github.com/ethereum/eth2.0-specs/blob/v0.7.0/specs/core/0_fork-choice.md#time-parameters
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2019-05-27 12:48:13 +00:00
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# Unchanged
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SECONDS_PER_SLOT*{.intdefine.} = 6'u64
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0.6.2 updates (#275)
* update process_justification_and_finalization to 0.6.2; mark AttesterSlashing as 0.6.2
* replace get_effective_balance(...) with state.validator_registry[idx].effective_balance; rm get_effective_balance, process_ejections, should_update_validator_registry, update_validator_registry, and update_registry_and_shuffling_data; update get_total_balance to 0.6.2; implement process_registry_updates
* rm exit_validator; implement is_slashable_attestation_data; partly update processAttesterSlashings
* mark HistoricalBatch and Eth1Data as 0.6.2; implement get_shard_delta(...); replace 0.5 finish_epoch_update with 0.6 process_final_updates
* mark increase_balance, decrease_balance, get_delayed_activation_exit_epoch, bls_aggregate_pubkeys, bls_verify_multiple, Attestation, Transfer, slot_to_epoch, Crosslink, get_current_epoch, int_to_bytes*, various constants, processEth1Data, processTransfers, and verifyStateRoot as 0.6.2; rm is_double_vote and is_surround_vote
* mark get_bitfield_bit, verify_bitfield, ProposerSlashing, DepositData, VoluntaryExit, PendingAttestation, Fork, integer_squareroot, get_epoch_start_slot, is_active_validator, generate_seed, some constants to 0.6.2; rename MIN_PENALTY_QUOTIENT to MIN_SLASHING_PENALTY_QUOTIENT
* rm get_previous_total_balance, get_current_epoch_boundary_attestations, get_previous_epoch_boundary_attestations, and get_previous_epoch_matching_head_attestations
* update BeaconState to 0.6.2; simplify legacy get_crosslink_committees_at_slot infrastructure a bit by noting that registry_change is always false; reimplment 0.5 get_crosslink_committees_at_slot in terms of 0.6 get_crosslink_committee
* mark process_deposit(...), get_block_root_at_slot(...), get_block_root(...), Deposit, BeaconBlockHeader, BeaconBlockBody, hash(...), get_active_index_root(...), various constants, get_shard_delta(...), get_epoch_start_shard(...), get_crosslink_committee(...), processRandao(...), processVoluntaryExits(...), cacheState(...) as 0.6.2
* rm removed-since-0.5 split(...), is_power_of_2(...), get_shuffling(...); rm 0.5 versions of get_active_validator_indices and get_epoch_committee_count; add a few tests for integer_squareroot
* mark bytes_to_int(...) and advanceState(...) as 0.6.2
* rm 0.5 get_attesting_indices; update get_attesting_balance to 0.6.2
* another tiny commit to poke AppVeyor to maybe not timeout at connecting to GitHub partway through CI: mark get_churn_limit(...), initiate_validator_exit(...), and Validator as 0.6.2
* mark get_attestation_slot(...), AttestationDataAndCustodyBit, and BeaconBlock as 0.6.2
2019-06-03 10:31:04 +00:00
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0.7.0 updates which don't change semantics; mostly comment changes (#281)
* 0.7.0 updates which don't change semantics; mostly comment changes
* mark get_attesting_indices, bls_verify, ProposerSlashing, BeaconBlockBody, deposit contract constants, state list length constants, compute_committee, get_crosslink_committee, is_slashable_attestation_data, processAttesterSlashings as 0.7.0; rename BASE_REWARD_QUOTIENT to BASE_REWARD_FACTOR
* complete marking unchanged-in-0.7.0 datatypes as such; a few more have trivial field renamings, etc
2019-06-13 07:40:58 +00:00
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# https://github.com/ethereum/eth2.0-specs/blob/v0.7.0/specs/core/0_beacon-chain.md#time-parameters
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0.6.2 updates (#275)
* update process_justification_and_finalization to 0.6.2; mark AttesterSlashing as 0.6.2
* replace get_effective_balance(...) with state.validator_registry[idx].effective_balance; rm get_effective_balance, process_ejections, should_update_validator_registry, update_validator_registry, and update_registry_and_shuffling_data; update get_total_balance to 0.6.2; implement process_registry_updates
* rm exit_validator; implement is_slashable_attestation_data; partly update processAttesterSlashings
* mark HistoricalBatch and Eth1Data as 0.6.2; implement get_shard_delta(...); replace 0.5 finish_epoch_update with 0.6 process_final_updates
* mark increase_balance, decrease_balance, get_delayed_activation_exit_epoch, bls_aggregate_pubkeys, bls_verify_multiple, Attestation, Transfer, slot_to_epoch, Crosslink, get_current_epoch, int_to_bytes*, various constants, processEth1Data, processTransfers, and verifyStateRoot as 0.6.2; rm is_double_vote and is_surround_vote
* mark get_bitfield_bit, verify_bitfield, ProposerSlashing, DepositData, VoluntaryExit, PendingAttestation, Fork, integer_squareroot, get_epoch_start_slot, is_active_validator, generate_seed, some constants to 0.6.2; rename MIN_PENALTY_QUOTIENT to MIN_SLASHING_PENALTY_QUOTIENT
* rm get_previous_total_balance, get_current_epoch_boundary_attestations, get_previous_epoch_boundary_attestations, and get_previous_epoch_matching_head_attestations
* update BeaconState to 0.6.2; simplify legacy get_crosslink_committees_at_slot infrastructure a bit by noting that registry_change is always false; reimplment 0.5 get_crosslink_committees_at_slot in terms of 0.6 get_crosslink_committee
* mark process_deposit(...), get_block_root_at_slot(...), get_block_root(...), Deposit, BeaconBlockHeader, BeaconBlockBody, hash(...), get_active_index_root(...), various constants, get_shard_delta(...), get_epoch_start_shard(...), get_crosslink_committee(...), processRandao(...), processVoluntaryExits(...), cacheState(...) as 0.6.2
* rm removed-since-0.5 split(...), is_power_of_2(...), get_shuffling(...); rm 0.5 versions of get_active_validator_indices and get_epoch_committee_count; add a few tests for integer_squareroot
* mark bytes_to_int(...) and advanceState(...) as 0.6.2
* rm 0.5 get_attesting_indices; update get_attesting_balance to 0.6.2
* another tiny commit to poke AppVeyor to maybe not timeout at connecting to GitHub partway through CI: mark get_churn_limit(...), initiate_validator_exit(...), and Validator as 0.6.2
* mark get_attestation_slot(...), AttestationDataAndCustodyBit, and BeaconBlock as 0.6.2
2019-06-03 10:31:04 +00:00
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# Unchanged
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2019-05-27 12:48:13 +00:00
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MIN_ATTESTATION_INCLUSION_DELAY* = 2'u64^2
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# Changed
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SLOTS_PER_EPOCH* {.intdefine.} = 64
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# Unchanged
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MIN_SEED_LOOKAHEAD* = 1
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ACTIVATION_EXIT_DELAY* = 4
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# Changed
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SLOTS_PER_ETH1_VOTING_PERIOD* = 16
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2019-06-12 07:48:49 +00:00
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SLOTS_PER_HISTORICAL_ROOT* = 128 # 64 doesn't work with GENESIS_SLOT == 0?
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2019-05-27 12:48:13 +00:00
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# Unchanged
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MIN_VALIDATOR_WITHDRAWABILITY_DELAY* = 2'u64^8
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PERSISTENT_COMMITTEE_PERIOD* = 2'u64^11
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MAX_CROSSLINK_EPOCHS* = 2'u64^6
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MIN_EPOCHS_TO_INACTIVITY_PENALTY* = 2'u64^2
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# State list lengths
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# ---------------------------------------------------------------
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0.7.0 updates which don't change semantics; mostly comment changes (#281)
* 0.7.0 updates which don't change semantics; mostly comment changes
* mark get_attesting_indices, bls_verify, ProposerSlashing, BeaconBlockBody, deposit contract constants, state list length constants, compute_committee, get_crosslink_committee, is_slashable_attestation_data, processAttesterSlashings as 0.7.0; rename BASE_REWARD_QUOTIENT to BASE_REWARD_FACTOR
* complete marking unchanged-in-0.7.0 datatypes as such; a few more have trivial field renamings, etc
2019-06-13 07:40:58 +00:00
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# https://github.com/ethereum/eth2.0-specs/blob/v0.7.0/specs/core/0_beacon-chain.md#state-list-lengths
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2019-05-27 12:48:13 +00:00
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# Changed
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LATEST_RANDAO_MIXES_LENGTH* = 64
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LATEST_ACTIVE_INDEX_ROOTS_LENGTH* = 64
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LATEST_SLASHED_EXIT_LENGTH* = 64
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# Reward and penalty quotients
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# ---------------------------------------------------------------
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0.7.0 updates which don't change semantics; mostly comment changes (#281)
* 0.7.0 updates which don't change semantics; mostly comment changes
* mark get_attesting_indices, bls_verify, ProposerSlashing, BeaconBlockBody, deposit contract constants, state list length constants, compute_committee, get_crosslink_committee, is_slashable_attestation_data, processAttesterSlashings as 0.7.0; rename BASE_REWARD_QUOTIENT to BASE_REWARD_FACTOR
* complete marking unchanged-in-0.7.0 datatypes as such; a few more have trivial field renamings, etc
2019-06-13 07:40:58 +00:00
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# https://github.com/ethereum/eth2.0-specs/blob/v0.7.0/specs/core/0_beacon-chain.md#rewards-and-penalties
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2019-05-27 12:48:13 +00:00
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# Unchanged
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0.7.0 updates which don't change semantics; mostly comment changes (#281)
* 0.7.0 updates which don't change semantics; mostly comment changes
* mark get_attesting_indices, bls_verify, ProposerSlashing, BeaconBlockBody, deposit contract constants, state list length constants, compute_committee, get_crosslink_committee, is_slashable_attestation_data, processAttesterSlashings as 0.7.0; rename BASE_REWARD_QUOTIENT to BASE_REWARD_FACTOR
* complete marking unchanged-in-0.7.0 datatypes as such; a few more have trivial field renamings, etc
2019-06-13 07:40:58 +00:00
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BASE_REWARD_FACTOR* = 2'u64^5
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More 0.6.1 updates (#274)
* implement get_churn_limit from 0.6.1; update initiate_validator_exit and get_previous_epoch to 0.6.1; remove obsoleted/non-spec reduce_balance, replaced by decrease_balance; mark BeaconBlock as 0.6.1
* rename get_block_root to get_block_root_at_slot and introduce epoch-oriented get_block_root; implement get_attestation_slot, get_matching_source_attestations, get_matching_target_attestations, get_matching_head_attestations, 0.6.1 get_attesting_indices, get_unslashed_attesting_indices, get_attestation_deltas, process_rewards_and_penalties; rm get_inactivity_penalty
* update Validator and processVoluntaryExits to 0.6.1; rm obsolete inclusion_slots/inclusion_distances
* rm removed activate_validator; mark DepositData, misc values, Gwei values, Randao processing, state caching as 0.6.1; update GENESIS_SLOT to 64, since it doesn't quite yet work at 0
* mark BeaconBlockHeader as 0.6.1; update BeaconBlockBody to 0.6.1; rename WHISTLEBLOWER_REWARD_QUOTIENT to WHISTLEBLOWING_REWARD_QUOTIENT; update slash_validator to 0.6.1
* implement 0.6.2 is_slashable_validator; update processProposerSlashings to 0.6.2; mark state caching as 0.6.2
* mark get_total_active_balance and process_slashings as 0.6.2; update get_base_reward to 0.6.2
* rm prepare_validator_for_withdrawal, process_exit_queue; mark mainnet misc constants as 0.6.2; update process block header to 0.6.2
* address mratsim's code review comment
2019-05-29 10:08:56 +00:00
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WHISTLEBLOWING_REWARD_QUOTIENT* = 2'u64^9
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2019-05-27 12:48:13 +00:00
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PROPOSER_REWARD_QUOTIENT* = 2'u64^3
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INACTIVITY_PENALTY_QUOTIENT* = 2'u64^25
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0.6.2 updates (#275)
* update process_justification_and_finalization to 0.6.2; mark AttesterSlashing as 0.6.2
* replace get_effective_balance(...) with state.validator_registry[idx].effective_balance; rm get_effective_balance, process_ejections, should_update_validator_registry, update_validator_registry, and update_registry_and_shuffling_data; update get_total_balance to 0.6.2; implement process_registry_updates
* rm exit_validator; implement is_slashable_attestation_data; partly update processAttesterSlashings
* mark HistoricalBatch and Eth1Data as 0.6.2; implement get_shard_delta(...); replace 0.5 finish_epoch_update with 0.6 process_final_updates
* mark increase_balance, decrease_balance, get_delayed_activation_exit_epoch, bls_aggregate_pubkeys, bls_verify_multiple, Attestation, Transfer, slot_to_epoch, Crosslink, get_current_epoch, int_to_bytes*, various constants, processEth1Data, processTransfers, and verifyStateRoot as 0.6.2; rm is_double_vote and is_surround_vote
* mark get_bitfield_bit, verify_bitfield, ProposerSlashing, DepositData, VoluntaryExit, PendingAttestation, Fork, integer_squareroot, get_epoch_start_slot, is_active_validator, generate_seed, some constants to 0.6.2; rename MIN_PENALTY_QUOTIENT to MIN_SLASHING_PENALTY_QUOTIENT
* rm get_previous_total_balance, get_current_epoch_boundary_attestations, get_previous_epoch_boundary_attestations, and get_previous_epoch_matching_head_attestations
* update BeaconState to 0.6.2; simplify legacy get_crosslink_committees_at_slot infrastructure a bit by noting that registry_change is always false; reimplment 0.5 get_crosslink_committees_at_slot in terms of 0.6 get_crosslink_committee
* mark process_deposit(...), get_block_root_at_slot(...), get_block_root(...), Deposit, BeaconBlockHeader, BeaconBlockBody, hash(...), get_active_index_root(...), various constants, get_shard_delta(...), get_epoch_start_shard(...), get_crosslink_committee(...), processRandao(...), processVoluntaryExits(...), cacheState(...) as 0.6.2
* rm removed-since-0.5 split(...), is_power_of_2(...), get_shuffling(...); rm 0.5 versions of get_active_validator_indices and get_epoch_committee_count; add a few tests for integer_squareroot
* mark bytes_to_int(...) and advanceState(...) as 0.6.2
* rm 0.5 get_attesting_indices; update get_attesting_balance to 0.6.2
* another tiny commit to poke AppVeyor to maybe not timeout at connecting to GitHub partway through CI: mark get_churn_limit(...), initiate_validator_exit(...), and Validator as 0.6.2
* mark get_attestation_slot(...), AttestationDataAndCustodyBit, and BeaconBlock as 0.6.2
2019-06-03 10:31:04 +00:00
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MIN_SLASHING_PENALTY_QUOTIENT* = 32 # 2^5
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2019-05-27 12:48:13 +00:00
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# Max operations per block
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# ---------------------------------------------------------------
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0.7.0 updates which don't change semantics; mostly comment changes (#281)
* 0.7.0 updates which don't change semantics; mostly comment changes
* mark get_attesting_indices, bls_verify, ProposerSlashing, BeaconBlockBody, deposit contract constants, state list length constants, compute_committee, get_crosslink_committee, is_slashable_attestation_data, processAttesterSlashings as 0.7.0; rename BASE_REWARD_QUOTIENT to BASE_REWARD_FACTOR
* complete marking unchanged-in-0.7.0 datatypes as such; a few more have trivial field renamings, etc
2019-06-13 07:40:58 +00:00
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# https://github.com/ethereum/eth2.0-specs/blob/v0.7.0/specs/core/0_beacon-chain.md#max-operations-per-block
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2019-05-27 12:48:13 +00:00
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# Unchanged
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MAX_PROPOSER_SLASHINGS* = 2^4
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MAX_ATTESTER_SLASHINGS* = 2^0
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MAX_ATTESTATIONS* = 2^7
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MAX_DEPOSITS* = 2^4
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MAX_VOLUNTARY_EXITS* = 2^4
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MAX_TRANSFERS* = 0
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type
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# Signature domains
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# ---------------------------------------------------------------
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0.7.0 updates which don't change semantics; mostly comment changes (#281)
* 0.7.0 updates which don't change semantics; mostly comment changes
* mark get_attesting_indices, bls_verify, ProposerSlashing, BeaconBlockBody, deposit contract constants, state list length constants, compute_committee, get_crosslink_committee, is_slashable_attestation_data, processAttesterSlashings as 0.7.0; rename BASE_REWARD_QUOTIENT to BASE_REWARD_FACTOR
* complete marking unchanged-in-0.7.0 datatypes as such; a few more have trivial field renamings, etc
2019-06-13 07:40:58 +00:00
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# https://github.com/ethereum/eth2.0-specs/blob/v0.7.0/specs/core/0_beacon-chain.md#signature-domains
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2019-05-27 12:48:13 +00:00
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SignatureDomain* {.pure.} = enum
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DOMAIN_BEACON_PROPOSER = 0
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DOMAIN_RANDAO = 1
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DOMAIN_ATTESTATION = 2
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DOMAIN_DEPOSIT = 3
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DOMAIN_VOLUNTARY_EXIT = 4
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DOMAIN_TRANSFER = 5
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