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110 lines
3.6 KiB
Rust
110 lines
3.6 KiB
Rust
use crate::proto_array::ProposerBoost;
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use crate::{
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Error, JustifiedBalances,
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proto_array::{ProtoArray, ProtoNode, ProtoNodeV17},
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proto_array_fork_choice::{ElasticList, ProtoArrayForkChoice, VoteTracker},
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};
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use ssz::{Encode, four_byte_option_impl};
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use ssz_derive::{Decode, Encode};
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use std::collections::HashMap;
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use superstruct::superstruct;
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use types::{Checkpoint, Hash256};
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// Define a "legacy" implementation of `Option<usize>` which uses four bytes for encoding the union
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// selector.
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four_byte_option_impl!(four_byte_option_checkpoint, Checkpoint);
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pub type SszContainer = SszContainerV29;
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#[superstruct(
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variants(V28, V29),
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variant_attributes(derive(Encode, Decode, Clone)),
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no_enum
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)]
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pub struct SszContainer {
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pub votes: Vec<VoteTracker>,
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pub prune_threshold: usize,
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// Deprecated, remove in a future schema migration
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#[superstruct(only(V28))]
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justified_checkpoint: Checkpoint,
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// Deprecated, remove in a future schema migration
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#[superstruct(only(V28))]
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finalized_checkpoint: Checkpoint,
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#[superstruct(only(V28))]
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pub nodes: Vec<ProtoNodeV17>,
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#[superstruct(only(V29))]
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pub nodes: Vec<ProtoNode>,
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pub indices: Vec<(Hash256, usize)>,
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pub previous_proposer_boost: ProposerBoost,
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}
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impl SszContainerV29 {
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pub fn from_proto_array(from: &ProtoArrayForkChoice) -> Self {
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let proto_array = &from.proto_array;
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Self {
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votes: from.votes.0.clone(),
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prune_threshold: proto_array.prune_threshold,
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nodes: proto_array.nodes.clone(),
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indices: proto_array.indices.iter().map(|(k, v)| (*k, *v)).collect(),
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previous_proposer_boost: proto_array.previous_proposer_boost,
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}
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}
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}
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impl TryFrom<(SszContainerV29, JustifiedBalances)> for ProtoArrayForkChoice {
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type Error = Error;
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fn try_from((from, balances): (SszContainerV29, JustifiedBalances)) -> Result<Self, Error> {
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let proto_array = ProtoArray {
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prune_threshold: from.prune_threshold,
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nodes: from.nodes,
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indices: from.indices.into_iter().collect::<HashMap<_, _>>(),
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previous_proposer_boost: from.previous_proposer_boost,
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};
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Ok(Self {
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proto_array,
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votes: ElasticList(from.votes),
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balances,
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})
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}
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}
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// Convert legacy V28 to current V29.
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impl From<SszContainerV28> for SszContainerV29 {
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fn from(v28: SszContainerV28) -> Self {
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Self {
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votes: v28.votes,
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prune_threshold: v28.prune_threshold,
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nodes: v28.nodes.into_iter().map(ProtoNode::V17).collect(),
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indices: v28.indices,
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previous_proposer_boost: v28.previous_proposer_boost,
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}
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}
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}
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// Downgrade current V29 to legacy V28 (lossy: V29 nodes lose payload-specific fields).
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impl From<SszContainerV29> for SszContainerV28 {
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fn from(v29: SszContainerV29) -> Self {
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Self {
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votes: v29.votes,
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prune_threshold: v29.prune_threshold,
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// These checkpoints are not consumed in v28 paths since the upgrade from v17,
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// we can safely default the values.
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justified_checkpoint: Checkpoint::default(),
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finalized_checkpoint: Checkpoint::default(),
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nodes: v29
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.nodes
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.into_iter()
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.filter_map(|node| match node {
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ProtoNode::V17(v17) => Some(v17),
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ProtoNode::V29(_) => None,
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})
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.collect(),
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indices: v29.indices,
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previous_proposer_boost: v29.previous_proposer_boost,
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}
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}
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}
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