Added deterministic keypair generation.

- The Account Manager has a new subcommand, allowing generation of deterministic keys given a particular validator index.
 - Split functionality in generate_deterministic_keypair function
 - Fixed up READMEs to reflect new functionality & correct naming.

validator_client/README.md

@@ -75,8 +75,9 @@ The configuration directory structure looks like:
 
 Where the hex value of the directory is a portion of the validator public key.
 
-Validator keys must be generated using the separate `accounts_manager` binary, which will
+Validator keys must be generated using the separate `account_manager` binary, which will
 place the keys into this directory structure in a format compatible with the validator client.
+Be sure to check the readme for `account_manager`.
 
 The chain specification (slot length, BLS domain, etc.) defaults to foundation
 parameters, however is temporary and an upgrade will allow these parameters to be

validator_client/src/main.rs

@@ -9,7 +9,7 @@ mod signer;
 use crate::config::Config as ValidatorClientConfig;
 use clap::{App, Arg};
 use protos::services_grpc::ValidatorServiceClient;
-use service::Service as ValidatorService;
+use crate::service::Service as ValidatorService;
 use slog::{error, info, o, Drain};
 use types::Keypair;
 

validator_client/src/service.rs

@@ -166,11 +166,15 @@ impl<B: BeaconNodeDuties + 'static, S: Signer + 'static> Service<B, S> {
 
         /* Generate the duties manager */
 
-        // generate keypairs
+        // Load generated keypairs
+        let keypairs = match config.fetch_keys(&log) {
+            Some(kps) => Arc::new(kps),
+            None => panic!("No key pairs found, cannot start validator client without at least one. Try running `./account_manager generate` first.")
+        };
 
         // TODO: keypairs are randomly generated; they should be loaded from a file or generated.
         // https://github.com/sigp/lighthouse/issues/160
-        let keypairs = Arc::new(generate_deterministic_keypairs(8));
+        //let keypairs = Arc::new(generate_deterministic_keypairs(8));
 
         // Builds a mapping of Epoch -> Map(PublicKey, EpochDuty)
         // where EpochDuty contains slot numbers and attestation data that each validator needs to