From 34412130c5a8df907680649adbae58ae45f3c0bc Mon Sep 17 00:00:00 2001 From: Raw Pong Ghmoa <58883403+q9f@users.noreply.github.com> Date: Mon, 1 Jun 2020 13:59:03 +0200 Subject: [PATCH] phase0: enable a tunable genesis time --- specs/phase0/beacon-chain.md | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/specs/phase0/beacon-chain.md b/specs/phase0/beacon-chain.md index 1be32da44..e4de2d38b 100644 --- a/specs/phase0/beacon-chain.md +++ b/specs/phase0/beacon-chain.md @@ -218,7 +218,7 @@ The following values are (non-configurable) constants used throughout the specif | Name | Value | Unit | Duration | | - | - | :-: | :-: | -| `MIN_GENESIS_DELAY` | `86400` | seconds | 1 day | +| `GENESIS_DELAY` | `172800` | seconds | 2 days | | `SECONDS_PER_SLOT` | `12` | seconds | 12 seconds | | `SECONDS_PER_ETH1_BLOCK` | `14` | seconds | 14 seconds | | `MIN_ATTESTATION_INCLUSION_DELAY` | `2**0` (= 1) | slots | 12 seconds | @@ -1137,7 +1137,7 @@ Before the Ethereum 2.0 genesis has been triggered, and for every Ethereum 1.0 b - `eth1_timestamp` is the Unix timestamp corresponding to `eth1_block_hash` - `deposits` is the sequence of all deposits, ordered chronologically, up to (and including) the block with hash `eth1_block_hash` -Eth1 blocks must only be considered once they are at least `SECONDS_PER_ETH1_BLOCK * ETH1_FOLLOW_DISTANCE` seconds old (i.e. `eth1_timestamp + SECONDS_PER_ETH1_BLOCK * ETH1_FOLLOW_DISTANCE <= current_unix_time`). Due to this constraint, if `MIN_GENESIS_DELAY < SECONDS_PER_ETH1_BLOCK * ETH1_FOLLOW_DISTANCE`, then the `genesis_time` can happen before the time/state is first known. Values should be configured to avoid this case. +Eth1 blocks must only be considered once they are at least `SECONDS_PER_ETH1_BLOCK * ETH1_FOLLOW_DISTANCE` seconds old (i.e. `eth1_timestamp + SECONDS_PER_ETH1_BLOCK * ETH1_FOLLOW_DISTANCE <= current_unix_time`). Due to this constraint, if `GENESIS_DELAY < SECONDS_PER_ETH1_BLOCK * ETH1_FOLLOW_DISTANCE`, then the `genesis_time` can happen before the time/state is first known. Values should be configured to avoid this case. ```python def initialize_beacon_state_from_eth1(eth1_block_hash: Bytes32, @@ -1149,7 +1149,7 @@ def initialize_beacon_state_from_eth1(eth1_block_hash: Bytes32, epoch=GENESIS_EPOCH, ) state = BeaconState( - genesis_time=eth1_timestamp - eth1_timestamp % MIN_GENESIS_DELAY + 2 * MIN_GENESIS_DELAY, + genesis_time=eth1_timestamp + GENESIS_DELAY, fork=fork, eth1_data=Eth1Data(block_hash=eth1_block_hash, deposit_count=len(deposits)), latest_block_header=BeaconBlockHeader(body_root=hash_tree_root(BeaconBlockBody())),