Add extra params to ChainSpec

beacon_chain/genesis/src/beacon_state.rs

@@ -1,7 +1,5 @@
 use spec::ChainSpec;
-use types::{
-    BeaconState, CrosslinkRecord, ForkData, Hash256, ValidatorRegistration, ValidatorStatus,
-};
+use types::{BeaconState, CrosslinkRecord, ForkData, ValidatorStatus};
 use validator_induction::ValidatorInductor;
 use validator_shuffling::{shard_and_committees_for_cycle, ValidatorAssignmentError};
 
@@ -12,12 +10,7 @@ pub enum Error {
     NotImplemented,
 }
 
-pub fn genesis_beacon_state(
-    spec: &ChainSpec,
-    initial_validators: &[ValidatorRegistration],
-    genesis_time: u64,
-    processed_pow_receipt_root: &Hash256,
-) -> Result<BeaconState, Error> {
+pub fn genesis_beacon_state(spec: &ChainSpec) -> Result<BeaconState, Error> {
     /*
      * Parse the ValidatorRegistrations into ValidatorRecords and induct them.
      *
@@ -25,7 +18,7 @@ pub fn genesis_beacon_state(
      */
     let validators = {
         let mut inductor = ValidatorInductor::new(0, spec.shard_count, vec![]);
-        for registration in initial_validators {
+        for registration in &spec.initial_validators {
             let _ = inductor.induct(&registration, ValidatorStatus::Active);
         }
         inductor.to_vec()
@@ -53,7 +46,7 @@ pub fn genesis_beacon_state(
          * Misc
          */
         slot: spec.initial_slot_number,
-        genesis_time,
+        genesis_time: spec.genesis_time,
         fork_data: ForkData {
             pre_fork_version: spec.initial_fork_version,
             post_fork_version: spec.initial_fork_version,
@@ -91,7 +84,7 @@ pub fn genesis_beacon_state(
         /*
          * PoW receipt root
          */
-        processed_pow_receipt_root: *processed_pow_receipt_root,
+        processed_pow_receipt_root: spec.processed_pow_receipt_root,
         candidate_pow_receipt_roots: vec![],
     })
 }
@@ -109,64 +102,34 @@ mod tests {
 
     use self::bls::{create_proof_of_possession, Keypair};
     use super::*;
-    use types::{Address, Hash256, ValidatorRegistration};
 
     // TODO: enhance these tests.
     // https://github.com/sigp/lighthouse/issues/117
 
-    fn random_registration() -> ValidatorRegistration {
-        let keypair = Keypair::random();
-        ValidatorRegistration {
-            pubkey: keypair.pk.clone(),
-            withdrawal_shard: 0,
-            withdrawal_address: Address::random(),
-            randao_commitment: Hash256::random(),
-            proof_of_possession: create_proof_of_possession(&keypair),
-        }
-    }
-
-    fn random_registrations(n: usize) -> Vec<ValidatorRegistration> {
-        let mut output = Vec::with_capacity(n);
-        for _ in 0..n {
-            output.push(random_registration())
-        }
-        output
-    }
-
     #[test]
     fn test_genesis() {
         let spec = ChainSpec::foundation();
-        let genesis_time = 42;
-        let initial_validators = random_registrations(4);
-        let processed_pow_receipt_root = Hash256::from("pow_root".as_bytes());
 
-        let state = genesis_beacon_state(
-            &spec,
-            &initial_validators,
-            genesis_time,
-            &processed_pow_receipt_root,
-        ).unwrap();
+        let state = genesis_beacon_state(&spec).unwrap();
 
-        assert_eq!(state.validator_registry.len(), 4);
+        assert_eq!(
+            state.validator_registry.len(),
+            spec.initial_validators.len()
+        );
     }
 
     #[test]
     fn test_genesis_bad_validator() {
-        let spec = ChainSpec::foundation();
-        let genesis_time = 42;
-        let mut initial_validators = random_registrations(5);
-        let processed_pow_receipt_root = Hash256::from("pow_root".as_bytes());
+        let mut spec = ChainSpec::foundation();
 
         let random_kp = Keypair::random();
-        initial_validators[4].proof_of_possession = create_proof_of_possession(&random_kp);
+        spec.initial_validators[4].proof_of_possession = create_proof_of_possession(&random_kp);
 
-        let state = genesis_beacon_state(
-            &spec,
-            &initial_validators,
-            genesis_time,
-            &processed_pow_receipt_root,
-        ).unwrap();
+        let state = genesis_beacon_state(&spec).unwrap();
 
-        assert_eq!(state.validator_registry.len(), 4);
+        assert_eq!(
+            state.validator_registry.len(),
+            spec.initial_validators.len() - 1
+        );
     }
 }

beacon_chain/genesis/src/lib.rs

@@ -3,5 +3,7 @@ extern crate types;
 extern crate validator_induction;
 extern crate validator_shuffling;
 
-pub mod beacon_state;
+mod beacon_state;
+
+pub use beacon_state::genesis_beacon_state;
 

beacon_chain/spec/Cargo.toml

@@ -4,4 +4,5 @@ version = "0.1.0"
 authors = ["Paul Hauner <paul@paulhauner.com>"]
 
 [dependencies]
+bls = { path = "../utils/bls"  }
 types = { path = "../types" }

beacon_chain/spec/src/foundation.rs

@@ -1,9 +1,13 @@
 use super::ChainSpec;
+use bls::{create_proof_of_possession, Keypair, PublicKey, SecretKey};
 
-use types::{Address, Hash256};
+use types::{Address, Hash256, ValidatorRegistration};
 
 impl ChainSpec {
     /// Returns a `ChainSpec` compatible with the specification from Ethereum Foundation.
+    ///
+    /// Of course, the actual foundation specs are unknown at this point so these are just a rough
+    /// estimate.
     pub fn foundation() -> Self {
         Self {
             /*
@@ -56,6 +60,59 @@ impl ChainSpec {
             max_attestations: 128,
             max_deposits: 16,
             max_exits: 16,
+            /*
+             * Intialization parameters
+             */
+            initial_validators: initial_validators_for_testing(),
+            genesis_time: 1544672897,
+            processed_pow_receipt_root: Hash256::from("pow_root".as_bytes()),
         }
     }
 }
+
+/// Generate a set of validator registrations to use with testing until the real chain starts.
+fn initial_validators_for_testing() -> Vec<ValidatorRegistration> {
+    // Some dummy private keys to start with.
+    let key_strings = vec![
+        "jzjxxgjajfjrmgodszzsgqccmhnyvetcuxobhtynojtpdtbj",
+        "gpeehcjudxdijzhjgirfuhahmnjutlchjmoffxmimbdejakd",
+        "ntrrdwwebodokuwaclhoqreqyodngoyhurvesghjfxeswoaj",
+        "cibmzkqrzdgdlrvqaxinwpvyhcgjkeysrsjkqtkcxvznsvth",
+        "erqrfuahdwprsstkawggounxmihzhrvbhchcyiwtaypqcedr",
+    ];
+
+    let mut initial_validators = Vec::with_capacity(key_strings.len());
+    for key_string in key_strings {
+        let keypair = {
+            let secret_key = match SecretKey::from_bytes(&key_string.as_bytes()) {
+                Ok(key) => key,
+                Err(_) => unreachable!(), // Keys are static and should not fail.
+            };
+            let public_key = PublicKey::from_secret_key(&secret_key);
+            Keypair {
+                sk: secret_key,
+                pk: public_key,
+            }
+        };
+        let validator_registration = ValidatorRegistration {
+            pubkey: keypair.pk.clone(),
+            withdrawal_shard: 0,
+            withdrawal_address: Address::random(),
+            randao_commitment: Hash256::random(),
+            proof_of_possession: create_proof_of_possession(&keypair),
+        };
+        initial_validators.push(validator_registration);
+    }
+
+    initial_validators
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_foundation_spec_can_be_constructed() {
+        let _ = ChainSpec::foundation();
+    }
+}

beacon_chain/spec/src/lib.rs

@@ -1,8 +1,9 @@
+extern crate bls;
 extern crate types;
 
 mod foundation;
 
-use types::{Address, Hash256};
+use types::{Address, Hash256, ValidatorRegistration};
 
 #[derive(PartialEq, Debug)]
 pub struct ChainSpec {
@@ -56,4 +57,10 @@ pub struct ChainSpec {
     pub max_attestations: u64,
     pub max_deposits: u64,
     pub max_exits: u64,
+    /*
+     * Intialization parameters
+     */
+    pub initial_validators: Vec<ValidatorRegistration>,
+    pub genesis_time: u64,
+    pub processed_pow_receipt_root: Hash256,
 }