Merge spec into types crate.

Also remove some pre-2018 `extern crate` calls.

eth2/types/src/lib.rs

@@ -25,6 +25,7 @@ pub mod proposer_slashing;
 pub mod shard_committee;
 pub mod shard_reassignment_record;
 pub mod slashable_vote_data;
+pub mod spec;
 pub mod special_record;
 pub mod validator;
 pub mod validator_registry;
@@ -54,6 +55,7 @@ pub use crate::proposal_signed_data::ProposalSignedData;
 pub use crate::proposer_slashing::ProposerSlashing;
 pub use crate::shard_committee::ShardCommittee;
 pub use crate::slashable_vote_data::SlashableVoteData;
+pub use crate::spec::ChainSpec;
 pub use crate::special_record::{SpecialRecord, SpecialRecordKind};
 pub use crate::validator::{StatusFlags as ValidatorStatusFlags, Validator};
 pub use crate::validator_registry_delta_block::ValidatorRegistryDeltaBlock;

eth2/types/src/spec/foundation.rs

@@ -0,0 +1,140 @@
+use super::ChainSpec;
+use bls::{Keypair, PublicKey, SecretKey, Signature};
+
+use crate::{Address, Eth1Data, Hash256, Validator};
+
+/// The size of a validators deposit in GWei.
+pub const DEPOSIT_GWEI: u64 = 32_000_000_000;
+
+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 {
+            /*
+             * Misc
+             */
+            shard_count: 1_024,
+            target_committee_size: 128,
+            ejection_balance: 16 * u64::pow(10, 9),
+            max_balance_churn_quotient: 32,
+            beacon_chain_shard_number: u64::max_value(),
+            max_casper_votes: 1_024,
+            latest_block_roots_length: 8_192,
+            latest_randao_mixes_length: 8_192,
+            latest_penalized_exit_length: 8_192,
+            max_withdrawals_per_epoch: 4,
+            /*
+             *  Deposit contract
+             */
+            deposit_contract_address: Address::from("TBD".as_bytes()),
+            deposit_contract_tree_depth: 32,
+            min_deposit: 1 * u64::pow(10, 9),
+            max_deposit: 32 * u64::pow(10, 9),
+            /*
+             * Initial Values
+             */
+            genesis_fork_version: 0,
+            genesis_slot: 0,
+            genesis_start_shard: 0,
+            far_future_slot: u64::max_value(),
+            zero_hash: Hash256::zero(),
+            empty_signature: Signature::empty_signature(),
+            bls_withdrawal_prefix_byte: 0x00,
+            /*
+             * Time parameters
+             */
+            slot_duration: 6,
+            min_attestation_inclusion_delay: 4,
+            epoch_length: 64,
+            seed_lookahead: 64,
+            entry_exit_delay: 256,
+            eth1_data_voting_period: 1_024,
+            min_validator_withdrawal_time: u64::pow(2, 14),
+            /*
+             * Reward and penalty quotients
+             */
+            base_reward_quotient: 32,
+            whistleblower_reward_quotient: 512,
+            includer_reward_quotient: 8,
+            inactivity_penalty_quotient: u64::pow(2, 24),
+            /*
+             * Max operations per block
+             */
+            max_proposer_slashings: 16,
+            max_casper_slashings: 16,
+            max_attestations: 128,
+            max_deposits: 16,
+            max_exits: 16,
+            /*
+             * Intialization parameters
+             */
+            initial_validators: initial_validators_for_testing(),
+            initial_balances: initial_balances_for_testing(),
+            genesis_time: 1_544_672_897,
+            intial_eth1_data: Eth1Data {
+                deposit_root: Hash256::from("deposit_root".as_bytes()),
+                block_hash: Hash256::from("block_hash".as_bytes()),
+            },
+        }
+    }
+}
+
+/// Generate a set of validator records to use with testing until the real chain starts.
+fn initial_validators_for_testing() -> Vec<Validator> {
+    // 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 = Validator {
+            pubkey: keypair.pk.clone(),
+            withdrawal_credentials: Hash256::zero(),
+            proposer_slots: 0,
+            activation_slot: u64::max_value(),
+            exit_slot: u64::max_value(),
+            withdrawal_slot: u64::max_value(),
+            penalized_slot: u64::max_value(),
+            exit_count: 0,
+            status_flags: None,
+            latest_custody_reseed_slot: 0,
+            penultimate_custody_reseed_slot: 0,
+        };
+        initial_validators.push(validator);
+    }
+
+    initial_validators
+}
+
+fn initial_balances_for_testing() -> Vec<u64> {
+    vec![DEPOSIT_GWEI; 4]
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_foundation_spec_can_be_constructed() {
+        let _ = ChainSpec::foundation();
+    }
+}

eth2/types/src/spec/mod.rs

@@ -0,0 +1,70 @@
+mod foundation;
+
+use crate::{Address, Eth1Data, Hash256, Validator};
+use bls::Signature;
+
+#[derive(PartialEq, Debug)]
+pub struct ChainSpec {
+    /*
+     * Misc
+     */
+    pub shard_count: u64,
+    pub target_committee_size: u64,
+    pub ejection_balance: u64,
+    pub max_balance_churn_quotient: u64,
+    pub beacon_chain_shard_number: u64,
+    pub max_casper_votes: u64,
+    pub latest_block_roots_length: u64,
+    pub latest_randao_mixes_length: u64,
+    pub latest_penalized_exit_length: u64,
+    pub max_withdrawals_per_epoch: u64,
+    /*
+     *  Deposit contract
+     */
+    pub deposit_contract_address: Address,
+    pub deposit_contract_tree_depth: u64,
+    pub min_deposit: u64,
+    pub max_deposit: u64,
+    /*
+     * Initial Values
+     */
+    pub genesis_fork_version: u64,
+    pub genesis_slot: u64,
+    pub genesis_start_shard: u64,
+    pub far_future_slot: u64,
+    pub zero_hash: Hash256,
+    pub empty_signature: Signature,
+    pub bls_withdrawal_prefix_byte: u8,
+    /*
+     * Time parameters
+     */
+    pub slot_duration: u64,
+    pub min_attestation_inclusion_delay: u64,
+    pub epoch_length: u64,
+    pub seed_lookahead: u64,
+    pub entry_exit_delay: u64,
+    pub eth1_data_voting_period: u64,
+    pub min_validator_withdrawal_time: u64,
+    /*
+     * Reward and penalty quotients
+     */
+    pub base_reward_quotient: u64,
+    pub whistleblower_reward_quotient: u64,
+    pub includer_reward_quotient: u64,
+    pub inactivity_penalty_quotient: u64,
+    /*
+     * Max operations per block
+     */
+    pub max_proposer_slashings: u64,
+    pub max_casper_slashings: u64,
+    pub max_attestations: u64,
+    pub max_deposits: u64,
+    pub max_exits: u64,
+    /*
+     * Intialization parameters
+     */
+    pub initial_validators: Vec<Validator>,
+    pub initial_balances: Vec<u64>,
+    pub genesis_time: u64,
+    pub intial_eth1_data: Eth1Data,
+}