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Start implementation of 'get attstation' validator function.

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- Created new /beacon/validator/attestation endpoint
 - Updated some small issues with the API spec.
This commit is contained in:
Luke Anderson
2019-08-29 14:58:49 +10:00
parent b9276da9db
commit eaec5e7b69
3 changed files with 67 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
beacon_node/rest_api/src/lib.rs
View File

@@ -173,7 +173,7 @@ pub fn start_server<T: BeaconChainTypes>(
helpers::implementation_pending_response(req)
}
(&Method::GET, "/beacon/validator/attestation") => {
helpers::implementation_pending_response(req)
validator::get_new_attestation::<T>(req)
}
(&Method::POST, "/beacon/validator/attestation") => {
helpers::implementation_pending_response(req)

66
beacon_node/rest_api/src/validator.rs
View File

@@ -62,7 +62,6 @@ pub fn get_validator_duties<T: BeaconChainTypes + 'static>(req: Request<Body>) -
e
))
})?;
//TODO: Handle an array of validators, currently only takes one
let validators: Vec<PublicKey> = match query.all_of("validator_pubkeys") {
Ok(v) => v
.iter()
@@ -197,7 +196,70 @@ pub fn get_new_beacon_block<T: BeaconChainTypes + 'static>(req: Request<Body>) -
let body = Body::from(
serde_json::to_string(&new_block)
.expect("We should always be able to serialize a new block that we created."),
.expect("We should always be able to serialize a new block that we produced."),
);
Ok(success_response(body))
}
/// HTTP Handler to produce a new Attestation from the current state, ready to be signed by a validator.
pub fn get_new_attestation<T: BeaconChainTypes + 'static>(req: Request<Body>) -> ApiResult {
// Get beacon state
let beacon_chain = req
.extensions()
.get::<Arc<BeaconChain<T>>>()
.ok_or_else(|| ApiError::ServerError("Beacon chain extension missing".to_string()))?;
//TODO Surely this state_cache thing is not necessary?
let _ = beacon_chain
.ensure_state_caches_are_built()
.map_err(|e| ApiError::ServerError(format!("Unable to build state caches: {:?}", e)))?;
let query = UrlQuery::from_request(&req)?;
let validator: PublicKey = match query.first_of(&["validator_pubkey"]) {
Ok((_, v)) => parse_pubkey(v.as_str())?,
Err(e) => {
return Err(e);
}
};
let poc_bit: bool = match query.first_of(&["poc_bit"]) {
Ok((_, v)) => v.parse::<bool>().map_err(|e| ApiError::InvalidQueryParams(format!("poc_bit is not a valid boolean value: {:?}", e)))?,
Err(e) => {
return Err(e);
}
};
//TODO: this is probably unnecessary if we're always doing it by current slot.
let _slot = match query.first_of(&["slot"]) {
Ok((_, v)) => {
let requested_slot = v.parse::<u64>().map_err(|e| {
ApiError::InvalidQueryParams(format!("Invalid slot parameter, must be a u64. {:?}", e))
})?;
let current_slot = beacon_chain.head().beacon_state.slot.as_u64();
if requested_slot != current_slot {
return Err(ApiError::InvalidQueryParams(format!("Attestation data can only be requested for the current slot ({:?}), not your requested slot ({:?})", current_slot, requested_slot)));
}
Slot::new(requested_slot)
},
Err(e) => {
return Err(e);
}
};
let shard: Shard = match query.first_of(&["shard"]) {
Ok((_, v)) => v.parse::<u64>().map_err(|e| ApiError::InvalidQueryParams(format!("Shard is not a valid u64 value: {:?}", e)))?,
Err(e) => {
return Err(e);
}
};
let attestation_data = match beacon_chain.produce_attestation_data(shard) {
Ok(v) => v,
Err(e) => {
return Err(ApiError::ServerError(format!("Could not produce an attestation: {:?}", e)));
}
};
//TODO: This is currently AttestationData, but should be IndexedAttestation?
let body = Body::from(
serde_json::to_string(&attestation_data)
.expect("We should always be able to serialize a new attestation that we produced."),
);
Ok(success_response(body))
}