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Add node chain-id validation for validation client

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Age Manning 2019-03-29 10:49:43 +11:00
parent 68b33620c2
commit aa29a66fac
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GPG Key ID: 05EED64B79E06A93
1 changed files with 21 additions and 6 deletions
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27
validator_client/src/service.rs
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@ -1,4 +1,13 @@
/// The validator service. Connects to a beacon node and signs blocks when required.
/// The Validator Client service.
///
/// Connects to a beacon node and negotiates the correct chain id.
///
/// Once connected, the service loads known validators keypairs from disk. Every slot,
/// the service pings the beacon node, asking for new duties for each of the validators.
///
/// When a validator needs to either produce a block or sign an attestation, it requests the
/// data from the beacon node and performs the signing before publishing the block to the beacon
/// node.
use crate::attester_service::{AttestationGrpcClient, AttesterService};
use crate::block_producer_service::{BeaconBlockGrpcClient, BlockProducerService};
use crate::config::Config as ValidatorConfig;
@ -36,8 +45,6 @@ pub struct Service {
/// The node we currently connected to.
connected_node_version: String,
/// The chain id we are processing on.
chain_id: u16,
/// The fork state we processing on.
fork: Fork,
/// The slot clock for this service.
slot_clock: SystemTimeSlotClock,
@ -74,7 +81,7 @@ impl Service {
Arc::new(BeaconNodeServiceClient::new(ch))
};
// retrieve node information
// retrieve node information and validate the beacon node
let node_info = loop {
match beacon_node_client.info(&Empty::new()) {
Err(e) => {
@ -84,18 +91,27 @@ impl Service {
continue;
}
Ok(info) => {
// verify the node's genesis time
if SystemTime::now()
.duration_since(SystemTime::UNIX_EPOCH)
.unwrap()
.as_secs()
< info.genesis_time
{
warn!(
error!(
log,
"Beacon Node's genesis time is in the future. No work to do.\n Exiting"
);
return Err("Genesis time in the future".into());
}
// verify the node's chain id
if config.spec.chain_id != info.chain_id as u8 {
error!(
log,
"Beacon Node's genesis time is in the future. No work to do.\n Exiting"
);
return Err(format!("Beacon node has the wrong chain id. Expected chain id: {}, node's chain id: {}", config.spec.chain_id, info.chain_id).into());
}
break info;
}
};
@ -150,7 +166,6 @@ impl Service {
Ok(Self {
connected_node_version: node_info.version,
chain_id: node_info.chain_id as u16,
fork,
slot_clock,
current_slot,