mirror of
https://github.com/sigp/lighthouse.git
synced 2026-03-16 03:12:41 +00:00
270 lines
11 KiB
Rust
270 lines
11 KiB
Rust
use crate::helpers::{
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check_content_type_for_json, parse_pubkey, publish_attestation_to_network,
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publish_beacon_block_to_network,
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};
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use crate::response_builder::ResponseBuilder;
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use crate::{ApiError, ApiResult, BoxFut, NetworkChannel, UrlQuery};
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use beacon_chain::{
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AttestationProcessingOutcome, BeaconChain, BeaconChainTypes, BlockProcessingOutcome,
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};
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use bls::PublicKey;
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use futures::future::Future;
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use futures::stream::Stream;
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use hyper::{Body, Request};
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use serde::{Deserialize, Serialize};
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use slog::{info, trace, warn, Logger};
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use std::sync::Arc;
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use types::beacon_state::EthSpec;
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use types::{Attestation, BeaconBlock, CommitteeIndex, RelativeEpoch, Slot};
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#[derive(PartialEq, Debug, Serialize, Deserialize, Clone)]
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pub struct ValidatorDuty {
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/// The validator's BLS public key, uniquely identifying them. _48-bytes, hex encoded with 0x prefix, case insensitive._
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pub validator_pubkey: PublicKey,
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/// The slot at which the validator must attest.
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pub attestation_slot: Option<Slot>,
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/// The index of the committee within `slot` of which the validator is a member.
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pub attestation_committee_index: Option<CommitteeIndex>,
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/// The position of the validator in the committee.
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pub attestation_committee_position: Option<usize>,
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/// The slot in which a validator must propose a block, or `null` if block production is not required.
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pub block_proposal_slot: Option<Slot>,
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}
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/// HTTP Handler to retrieve a the duties for a set of validators during a particular epoch
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///
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/// The given `epoch` must be within one epoch of the current epoch.
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pub fn get_validator_duties<T: BeaconChainTypes + 'static>(
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req: Request<Body>,
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beacon_chain: Arc<BeaconChain<T>>,
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log: Logger,
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) -> ApiResult {
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slog::trace!(log, "Validator duties requested of API: {:?}", &req);
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let query = UrlQuery::from_request(&req)?;
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let epoch = query.epoch()?;
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let mut state = beacon_chain
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.state_at_slot(epoch.start_slot(T::EthSpec::slots_per_epoch()))
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.map_err(|e| {
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ApiError::ServerError(format!("Unable to load state for epoch {}: {:?}", epoch, e))
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})?;
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let current_epoch = state.current_epoch();
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let relative_epoch = RelativeEpoch::from_epoch(current_epoch, epoch).map_err(|_| {
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ApiError::BadRequest(format!(
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"Epoch must be within one epoch of the current epoch",
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))
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})?;
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state
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.build_committee_cache(relative_epoch, &beacon_chain.spec)
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.map_err(|e| ApiError::ServerError(format!("Unable to build committee cache: {:?}", e)))?;
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state
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.update_pubkey_cache()
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.map_err(|e| ApiError::ServerError(format!("Unable to build pubkey cache: {:?}", e)))?;
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// Get a list of all validators for this epoch.
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//
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// Used for quickly determining the slot for a proposer.
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let validator_proposers: Vec<(usize, Slot)> = epoch
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.slot_iter(T::EthSpec::slots_per_epoch())
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.map(|slot| {
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state
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.get_beacon_proposer_index(slot, &beacon_chain.spec)
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.map(|i| (i, slot))
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.map_err(|e| {
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ApiError::ServerError(format!(
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"Unable to get proposer index for validator: {:?}",
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e
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))
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})
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})
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.collect::<Result<Vec<_>, _>>()?;
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let duties = query
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.all_of("validator_pubkeys")?
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.iter()
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.map(|validator_pubkey_str| {
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parse_pubkey(validator_pubkey_str).and_then(|validator_pubkey| {
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if let Some(validator_index) =
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state.get_validator_index(&validator_pubkey).map_err(|e| {
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ApiError::ServerError(format!("Unable to read pubkey cache: {:?}", e))
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})?
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{
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let duties = state
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.get_attestation_duties(validator_index, relative_epoch)
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.map_err(|e| {
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ApiError::ServerError(format!(
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"Unable to obtain attestation duties: {:?}",
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e
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))
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})?;
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let block_proposal_slot = validator_proposers
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.iter()
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.find(|(i, _slot)| validator_index == *i)
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.map(|(_i, slot)| *slot);
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Ok(ValidatorDuty {
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validator_pubkey,
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attestation_slot: duties.map(|d| d.slot),
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attestation_committee_index: duties.map(|d| d.index),
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attestation_committee_position: duties.map(|d| d.committee_position),
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block_proposal_slot,
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})
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} else {
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Ok(ValidatorDuty {
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validator_pubkey,
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attestation_slot: None,
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attestation_committee_index: None,
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attestation_committee_position: None,
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block_proposal_slot: None,
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})
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}
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})
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})
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.collect::<Result<Vec<_>, ApiError>>()?;
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ResponseBuilder::new(&req)?.body_no_ssz(&duties)
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}
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/// HTTP Handler to produce a new BeaconBlock from the current state, ready to be signed by a validator.
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pub fn get_new_beacon_block<T: BeaconChainTypes + 'static>(
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req: Request<Body>,
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beacon_chain: Arc<BeaconChain<T>>,
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) -> ApiResult {
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let query = UrlQuery::from_request(&req)?;
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let slot = query.slot()?;
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let randao_reveal = query.randao_reveal()?;
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let (new_block, _state) = beacon_chain
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.produce_block(randao_reveal, slot)
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.map_err(|e| {
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ApiError::ServerError(format!(
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"Beacon node is not able to produce a block: {:?}",
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e
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))
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})?;
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ResponseBuilder::new(&req)?.body(&new_block)
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}
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/// HTTP Handler to publish a BeaconBlock, which has been signed by a validator.
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pub fn publish_beacon_block<T: BeaconChainTypes + 'static>(
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req: Request<Body>,
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beacon_chain: Arc<BeaconChain<T>>,
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network_chan: NetworkChannel,
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log: Logger,
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) -> BoxFut {
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try_future!(check_content_type_for_json(&req));
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let response_builder = ResponseBuilder::new(&req);
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let body = req.into_body();
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trace!(
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log,
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"Got the request body, now going to parse it into a block."
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);
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Box::new(body
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.concat2()
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.map_err(|e| ApiError::ServerError(format!("Unable to get request body: {:?}",e)))
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.and_then(|chunks| {
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serde_json::from_slice(&chunks).map_err(|e| ApiError::BadRequest(format!("Unable to parse JSON into BeaconBlock: {:?}",e)))
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})
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.and_then(move |block: BeaconBlock<T::EthSpec>| {
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let slot = block.slot;
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match beacon_chain.process_block(block.clone()) {
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Ok(BlockProcessingOutcome::Processed { block_root }) => {
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// Block was processed, publish via gossipsub
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info!(log, "Processed valid block from API, transmitting to network."; "block_slot" => slot, "block_root" => format!("{}", block_root));
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publish_beacon_block_to_network::<T>(network_chan, block)
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}
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Ok(outcome) => {
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warn!(log, "BeaconBlock could not be processed, but is being sent to the network anyway."; "outcome" => format!("{:?}", outcome));
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publish_beacon_block_to_network::<T>(network_chan, block)?;
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Err(ApiError::ProcessingError(format!(
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"The BeaconBlock could not be processed, but has still been published: {:?}",
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outcome
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)))
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}
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Err(e) => {
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Err(ApiError::ServerError(format!(
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"Error while processing block: {:?}",
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e
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)))
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}
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}
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}).and_then(|_| {
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response_builder?.body_no_ssz(&())
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}))
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}
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/// HTTP Handler to produce a new Attestation from the current state, ready to be signed by a validator.
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pub fn get_new_attestation<T: BeaconChainTypes + 'static>(
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req: Request<Body>,
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beacon_chain: Arc<BeaconChain<T>>,
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) -> ApiResult {
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let query = UrlQuery::from_request(&req)?;
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let slot = query.slot()?;
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let index = query.committee_index()?;
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let attestation = beacon_chain
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.produce_attestation(slot, index)
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.map_err(|e| ApiError::BadRequest(format!("Unable to produce attestation: {:?}", e)))?;
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ResponseBuilder::new(&req)?.body(&attestation)
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}
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/// HTTP Handler to publish an Attestation, which has been signed by a validator.
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pub fn publish_attestation<T: BeaconChainTypes + 'static>(
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req: Request<Body>,
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beacon_chain: Arc<BeaconChain<T>>,
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network_chan: NetworkChannel,
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log: Logger,
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) -> BoxFut {
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try_future!(check_content_type_for_json(&req));
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let response_builder = ResponseBuilder::new(&req);
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Box::new(req
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.into_body()
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.concat2()
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.map_err(|e| ApiError::ServerError(format!("Unable to get request body: {:?}",e)))
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.map(|chunk| chunk.iter().cloned().collect::<Vec<u8>>())
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.and_then(|chunks| {
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serde_json::from_slice(&chunks.as_slice()).map_err(|e| {
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ApiError::BadRequest(format!(
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"Unable to deserialize JSON into a BeaconBlock: {:?}",
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e
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))
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})
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})
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.and_then(move |attestation: Attestation<T::EthSpec>| {
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match beacon_chain.process_attestation(attestation.clone()) {
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Ok(AttestationProcessingOutcome::Processed) => {
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// Block was processed, publish via gossipsub
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info!(log, "Processed valid attestation from API, transmitting to network.");
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publish_attestation_to_network::<T>(network_chan, attestation)
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}
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Ok(outcome) => {
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warn!(log, "Attestation could not be processed, but is being sent to the network anyway."; "outcome" => format!("{:?}", outcome));
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publish_attestation_to_network::<T>(network_chan, attestation)?;
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Err(ApiError::ProcessingError(format!(
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"The Attestation could not be processed, but has still been published: {:?}",
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outcome
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)))
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}
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Err(e) => {
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Err(ApiError::ServerError(format!(
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"Error while processing attestation: {:?}",
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e
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)))
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}
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}
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}).and_then(|_| {
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response_builder?.body_no_ssz(&())
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}))
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}
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