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Spec v1.7.0-alpha.6 and Gloas genesis (#9190)

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Co-Authored-By: Josh King <josh@sigmaprime.io>

Co-Authored-By: Jimmy Chen <jchen.tc@gmail.com>

Co-Authored-By: Michael Sproul <michael@sigmaprime.io>
This commit is contained in:
jking-aus
2026-04-29 10:23:24 +02:00
committed by GitHub
parent e8c865dcc6
commit 16132a3694
35 changed files with 349 additions and 117 deletions
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35
consensus/state_processing/src/genesis.rs
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@@ -175,13 +175,11 @@ pub fn initialize_beacon_state_from_eth1<E: EthSpec>(
bid.parent_block_hash = el_genesis_hash;
bid.block_hash = ExecutionBlockHash::default();
// Update latest_block_header to reflect the Gloas genesis block body which contains
// the EL genesis hash in the signed_execution_payload_bid. This is needed because
// BeaconState::new() created the header from BeaconBlock::empty() which has zero bid
// fields, but the spec requires the genesis block's bid to contain the EL block hash
// and the tree hash root of empty ExecutionRequests.
let block = genesis_block(&state, spec)?;
state.latest_block_header_mut().body_root = block.body_root();
// Update the `latest_block_header.body_root` so that it matches the body of the
// Gloas genesis block, which embeds `state.latest_execution_payload_bid` in its
// `signed_execution_payload_bid` field (see `genesis_block`).
let genesis_body_root = genesis_block(&state, spec)?.body_root();
state.latest_block_header_mut().body_root = genesis_body_root;
}
// Now that we have our validators, initialize the caches (including the committees)
@@ -193,24 +191,23 @@ pub fn initialize_beacon_state_from_eth1<E: EthSpec>(
Ok(state)
}
/// Create an unsigned genesis `BeaconBlock` whose body matches the genesis state.
/// Create an unsigned genesis `BeaconBlock`.
///
/// For Gloas, the block's `signed_execution_payload_bid` is populated from the state's
/// `latest_execution_payload_bid` so that the body root is consistent with
/// `state.latest_block_header.body_root`.
/// Per spec, the genesis block body is empty (all default fields) except for Gloas,
/// where `body.signed_execution_payload_bid.message` is initialised from
/// `state.latest_execution_payload_bid` so that the first post-genesis proposer can
/// build on the correct execution layer head.
///
/// The returned block has `state_root == Hash256::ZERO`; callers that need the real
/// state root should set it themselves.
/// `state.latest_block_header.body_root` is set from this same block's body, so the
/// two must stay in sync.
pub fn genesis_block<E: EthSpec>(
genesis_state: &BeaconState<E>,
state: &BeaconState<E>,
spec: &ChainSpec,
) -> Result<BeaconBlock<E>, BeaconStateError> {
let mut block = BeaconBlock::empty(spec);
if let Ok(block) = block.as_gloas_mut() {
let state_bid = genesis_state.latest_execution_payload_bid()?;
let bid = &mut block.body.signed_execution_payload_bid.message;
bid.block_hash = state_bid.block_hash;
bid.execution_requests_root = state_bid.execution_requests_root;
if let BeaconBlock::Gloas(ref mut gloas_block) = block {
let bid = state.latest_execution_payload_bid()?.clone();
gloas_block.body.signed_execution_payload_bid.message = bid;
}
Ok(block)
}