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Add the /beacon/heads API endpoint

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This commit is contained in:
Paul Hauner
2019-11-29 17:27:08 +11:00
parent 57dfd2c898
commit 91cf782f8f
3 changed files with 35 additions and 2 deletions
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11
beacon_node/beacon_chain/src/beacon_chain.rs
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@@ -336,10 +336,17 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
self.canonical_head.read().clone() self.canonical_head.read().clone()
} }
/// Returns the current heads of the `BeaconChain`. For the canonical head, see `Self::head`.
///
/// Returns `(block_root, block_slot)`.
pub fn heads(&self) -> Vec<(Hash256, Slot)> {
self.head_tracker.heads()
}
/// Returns the `BeaconState` at the given slot. /// Returns the `BeaconState` at the given slot.
/// ///
/// Returns `None` when the state is not found in the database or there is an error skipping /// Returns `None` when the state is not found in the database or there is an error skipping
/// to a future state. /// to a future state.
pub fn state_at_slot(&self, slot: Slot) -> Result<BeaconState<T::EthSpec>, Error> { pub fn state_at_slot(&self, slot: Slot) -> Result<BeaconState<T::EthSpec>, Error> {
let head_state = self.head().beacon_state; let head_state = self.head().beacon_state;

23
beacon_node/rest_api/src/beacon.rs
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@@ -56,6 +56,29 @@ pub fn get_head<T: BeaconChainTypes>(
ResponseBuilder::new(&req)?.body(&head) ResponseBuilder::new(&req)?.body(&head)
} }
#[derive(Serialize, Deserialize, Encode)]
pub struct HeadBeaconBlock {
beacon_block_root: Hash256,
beacon_block_slot: Slot,
}
/// HTTP handler to return a list of head BeaconBlocks.
pub fn get_heads<T: BeaconChainTypes>(
req: Request<Body>,
beacon_chain: Arc<BeaconChain<T>>,
) -> ApiResult {
let heads = beacon_chain
.heads()
.into_iter()
.map(|(beacon_block_root, beacon_block_slot)| HeadBeaconBlock {
beacon_block_root,
beacon_block_slot,
})
.collect::<Vec<_>>();
ResponseBuilder::new(&req)?.body(&heads)
}
#[derive(Serialize, Encode)] #[derive(Serialize, Encode)]
#[serde(bound = "T: EthSpec")] #[serde(bound = "T: EthSpec")]
pub struct BlockResponse<T: EthSpec> { pub struct BlockResponse<T: EthSpec> {

3
beacon_node/rest_api/src/router.rs
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@@ -64,6 +64,9 @@ pub fn route<T: BeaconChainTypes>(
// Methods for Beacon Node // Methods for Beacon Node
(&Method::GET, "/beacon/head") => into_boxfut(beacon::get_head::<T>(req, beacon_chain)), (&Method::GET, "/beacon/head") => into_boxfut(beacon::get_head::<T>(req, beacon_chain)),
(&Method::GET, "/beacon/heads") => {
into_boxfut(beacon::get_heads::<T>(req, beacon_chain))
}
(&Method::GET, "/beacon/block") => { (&Method::GET, "/beacon/block") => {
into_boxfut(beacon::get_block::<T>(req, beacon_chain)) into_boxfut(beacon::get_block::<T>(req, beacon_chain))
} }