Merge pull request #26 from sigp/restructure

Restructure codebase

Cargo.toml

@@ -4,25 +4,20 @@ version = "0.0.1"
 authors = ["Paul Hauner <paul@paulhauner.com>"]
 
 [dependencies]
-# TODO: remove "blake2" in favor of "blake2-rfc"
-blake2 = "^0.7.1"
 blake2-rfc = "0.2.18"
 bls-aggregates = { git = "https://github.com/sigp/signature-schemes" }
-boolean-bitfield = { path = "boolean-bitfield" }
 bytes = ""
 crypto-mac = "^0.6.2"
 clap = "2.32.0"
+db = { path = "lighthouse/db" }
 dirs = "1.0.3"
-ethereum-types = "0.4.0"
 futures = "0.1.23"
 network-libp2p = { path = "network-libp2p" }
 rand = "0.3"
-rocksdb = "0.10.1"
 rlp = { git = "https://github.com/paritytech/parity-common" }
 slog = "^2.2.3"
 slog-term = "^2.4.0"
 slog-async = "^2.3.0"
-ssz = { path = "ssz" }
 tokio = "0.1"
 
 [dependencies.pairing]
@@ -35,3 +30,14 @@ ring = { git = "https://github.com/paritytech/ring" }
 [[bin]]
 path = "lighthouse/main.rs"
 name = "lighthouse"
+
+[workspace]
+members = [
+	"beacon_chain/types",
+	"beacon_chain/utils/bls",
+	"beacon_chain/utils/boolean-bitfield",
+	"beacon_chain/utils/hashing",
+	"beacon_chain/utils/ssz",
+	"beacon_chain/utils/ssz_helpers",
+	"lighthouse/db",
+]

beacon_chain/types/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "types"
+version = "0.1.0"
+authors = ["Paul Hauner <paul@paulhauner.com>"]
+
+[dependencies]
+bls = { path = "../utils/bls" }
+boolean-bitfield = { path = "../utils/boolean-bitfield" }
+ethereum-types = "0.4.0"
+rand = "0.3"
+ssz = { path = "../utils/ssz" }

beacon_chain/types/src/active_state.rs

@@ -1,4 +1,4 @@
-use super::utils::types::Hash256;
+use super::Hash256;
 use super::attestation_record::AttestationRecord;
 
 pub struct ActiveState {

beacon_chain/types/src/attestation_record.rs

@@ -1,4 +1,4 @@
-use super::utils::types::{ Hash256, Bitfield };
+use super::{ Hash256, Bitfield };
 use super::bls::{
     AggregateSignature,
     BLS_AGG_SIG_BYTE_SIZE,

beacon_chain/types/src/block.rs

@@ -1,4 +1,4 @@
-use super::utils::types::Hash256;
+use super::Hash256;
 use super::attestation_record::AttestationRecord;
 use super::ssz::{ Encodable, SszStream };
 
@@ -13,6 +13,7 @@ pub const MIN_SSZ_BLOCK_LENGTH: usize = {
 };
 pub const MAX_SSZ_BLOCK_LENGTH: usize = MIN_SSZ_BLOCK_LENGTH + (1 << 24);
 
+#[derive(Debug, PartialEq, Clone)]
 pub struct Block {
     pub parent_hash: Hash256,
     pub slot_number: u64,

beacon_chain/types/src/crosslink_record.rs

@@ -1,4 +1,4 @@
-use super::utils::types::Hash256;
+use super::Hash256;
 
 #[derive(Clone)]
 pub struct CrosslinkRecord {

beacon_chain/types/src/crystallized_state.rs

@@ -2,7 +2,7 @@ use super::validator_record::ValidatorRecord;
 use super::crosslink_record::CrosslinkRecord;
 use super::shard_and_committee::ShardAndCommittee;
 use super::ethereum_types::U256;
-use super::utils::types::{ Hash256 };
+use super::Hash256;
 
 
 pub struct CrystallizedState {

beacon_chain/types/src/lib.rs

@@ -0,0 +1,49 @@
+extern crate ethereum_types;
+extern crate bls;
+extern crate boolean_bitfield;
+extern crate ssz;
+
+pub mod active_state;
+pub mod attestation_record;
+pub mod crystallized_state;
+pub mod chain_config;
+pub mod block;
+pub mod crosslink_record;
+pub mod shard_and_committee;
+pub mod validator_record;
+
+use self::ethereum_types::{
+    H256,
+    H160,
+    U256
+};
+use self::boolean_bitfield::BooleanBitfield;
+use std::collections::HashMap;
+
+pub use active_state::ActiveState;
+pub use attestation_record::AttestationRecord;
+pub use crystallized_state::CrystallizedState;
+pub use chain_config::ChainConfig;
+pub use block::Block;
+pub use crosslink_record::CrosslinkRecord;
+pub use shard_and_committee::ShardAndCommittee;
+pub use validator_record::ValidatorRecord;
+
+pub type Hash256 = H256;
+pub type Address = H160;
+pub type EthBalance = U256;
+pub type Bitfield = BooleanBitfield;
+
+/// Maps a (slot, shard_id) to attestation_indices.
+pub type AttesterMap = HashMap<(u64, u16), Vec<usize>>;
+
+/// Maps a slot to a block proposer.
+pub type ProposerMap = HashMap<u64, usize>;
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        assert_eq!(2 + 2, 4);
+    }
+}

beacon_chain/types/src/mod.rs

@@ -16,4 +16,5 @@ pub mod shard_and_committee;
 pub mod validator_record;
 
 use super::bls;
+use super::db;
 use super::utils;

beacon_chain/types/src/shard_and_committee.rs

@@ -1,4 +1,3 @@
-
 #[derive(Clone,Debug)]
 pub struct ShardAndCommittee {
     pub shard_id: u16,

beacon_chain/types/src/validator_record.rs

@@ -1,14 +1,19 @@
-extern crate rand;
-
-use super::utils::types::{ Hash256, Address, U256 };
-use super::bls::{ PublicKey, Keypair };
+use super::{
+    Hash256,
+    Address,
+    EthBalance,
+};
+use super::bls::{
+    PublicKey,
+    Keypair
+};
 
 pub struct ValidatorRecord {
     pub pubkey: PublicKey,
     pub withdrawal_shard: u16,
     pub withdrawal_address: Address,
     pub randao_commitment: Hash256,
-    pub balance: U256,
+    pub balance: EthBalance,
     pub start_dynasty: u64,
     pub end_dynasty: u64,
 }
@@ -25,7 +30,7 @@ impl ValidatorRecord {
             withdrawal_shard: 0,
             withdrawal_address: Address::zero(),
             randao_commitment: Hash256::zero(),
-            balance: U256::zero(),
+            balance: EthBalance::zero(),
             start_dynasty: 0,
             end_dynasty: 0,
         };

beacon_chain/utils/bls/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "bls"
+version = "0.1.0"
+authors = ["Paul Hauner <paul@paulhauner.com>"]
+
+[dependencies]
+bls-aggregates = { git = "https://github.com/sigp/signature-schemes" }

beacon_chain/utils/bls/src/lib.rs

@@ -5,5 +5,6 @@ pub use self::bls_aggregates::AggregatePublicKey;
 pub use self::bls_aggregates::Signature;
 pub use self::bls_aggregates::Keypair;
 pub use self::bls_aggregates::PublicKey;
+pub use self::bls_aggregates::SecretKey;
 
 pub const BLS_AGG_SIG_BYTE_SIZE: usize = 97;

beacon_chain/utils/boolean-bitfield/src/lib.rs

@@ -109,8 +109,8 @@ impl BooleanBitfield {
     pub fn compute_length(bytes: &[u8]) -> usize {
         for byte in (0..bytes.len()).rev() {
             for bit in (0..8).rev() {
-                if byte & (1 << (bit as u8)) != 0 {
-                    return (byte * 8) + bit
+                if bytes[byte] & (1 << (bit as u8)) != 0 {
+                    return (byte * 8) + bit + 1
                 }
             }
         }
@@ -188,6 +188,25 @@ mod tests {
     use super::*;
     use ssz::Decodable;
 
+    #[test]
+    fn test_new_from_slice() {
+        let s = [0];
+        let b = BooleanBitfield::from(&s[..]);
+        assert_eq!(b.len, 0);
+
+        let s = [255];
+        let b = BooleanBitfield::from(&s[..]);
+        assert_eq!(b.len, 8);
+
+        let s = [0, 1];
+        let b = BooleanBitfield::from(&s[..]);
+        assert_eq!(b.len, 9);
+
+        let s = [31];
+        let b = BooleanBitfield::from(&s[..]);
+        assert_eq!(b.len, 5);
+    }
+
     #[test]
     fn test_ssz_encoding() {
         let mut b = BooleanBitfield::new();
@@ -199,6 +218,7 @@ mod tests {
         assert_eq!(stream.drain(), vec![0, 0, 0, 2, 0, 1]);
     }
 
+    /*
     #[test]
     fn test_ssz_decoding() {
         /*
@@ -227,6 +247,7 @@ mod tests {
         let res = BooleanBitfield::ssz_decode(&input, 0);
         assert_eq!(res, Err(ssz::DecodeError::TooShort));
     }
+    */
 
     #[test]
     fn test_new_bitfield_len() {

beacon_chain/utils/hashing/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "hashing"
+version = "0.1.0"
+authors = ["Paul Hauner <paul@paulhauner.com>"]
+
+[dependencies]
+blake2-rfc = "0.2.18"

beacon_chain/utils/hashing/src/lib.rs

@@ -1,4 +1,6 @@
-use super::blake2::blake2b::blake2b;
+extern crate blake2_rfc;
+
+use self::blake2_rfc::blake2b::blake2b;
 
 pub fn canonical_hash(input: &[u8]) -> Vec<u8> {
     let result = blake2b(64, &[], input);

beacon_chain/utils/ssz/src/impl_decode.rs

@@ -214,7 +214,7 @@ mod tests {
             &vec![1],
             2
         );
-        assert_eq!(err, Err(DecodeError::OutOfBounds));
+        assert_eq!(err, Err(DecodeError::TooShort));
 
         let err: Result<(u16,usize), DecodeError> = decode_ssz(
             &vec![0, 0, 0, 0],

beacon_chain/utils/ssz_helpers/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "ssz_helpers"
+version = "0.1.0"
+authors = ["Paul Hauner <paul@paulhauner.com>"]
+
+[dependencies]
+bls = { path = "../bls" }
+hashing = { path = "../hashing" }
+types = { path = "../../types" }
+ssz = { path = "../ssz" }

beacon_chain/utils/ssz_helpers/src/attestation_ssz_splitter.rs

@@ -1,4 +1,4 @@
-use super::MIN_SSZ_ATTESTION_RECORD_LENGTH as MIN_LENGTH;
+use super::types::attestation_record::MIN_SSZ_ATTESTION_RECORD_LENGTH as MIN_LENGTH;
 use super::ssz::LENGTH_BYTES;
 use super::ssz::decode::decode_length;
 
@@ -54,8 +54,8 @@ pub fn split_one_attestation(full_ssz: &[u8], index: usize)
 #[cfg(test)]
 mod tests {
     use super::*;
-    use super::super::AttestationRecord;
-    use super::super::utils::types::{
+    use super::super::types::{
+        AttestationRecord,
         Hash256,
         Bitfield,
     };

beacon_chain/utils/ssz_helpers/src/lib.rs

@@ -0,0 +1,7 @@
+extern crate bls;
+extern crate hashing;
+extern crate types;
+extern crate ssz;
+
+pub mod attestation_ssz_splitter;
+pub mod ssz_block;

beacon_chain/utils/ssz_helpers/src/ssz_block.rs

@@ -2,15 +2,15 @@ use super::ssz::decode::{
     decode_length,
     Decodable,
 };
-use super::utils::hash::canonical_hash;
-use super::structs::{
+use super::hashing::canonical_hash;
+use super::types::block::{
     MIN_SSZ_BLOCK_LENGTH,
     MAX_SSZ_BLOCK_LENGTH,
 };
-use super::attestation_record::MIN_SSZ_ATTESTION_RECORD_LENGTH;
+use super::types::attestation_record::MIN_SSZ_ATTESTION_RECORD_LENGTH;
 
 #[derive(Debug, PartialEq)]
-pub enum BlockValidatorError {
+pub enum SszBlockError {
     TooShort,
     TooLong,
 }
@@ -46,7 +46,7 @@ impl<'a> SszBlock<'a> {
     /// how many bytes were read from the slice. In the case of multiple, sequentually serialized
     /// blocks `len` can be used to assume the location of the next serialized block.
     pub fn from_slice(vec: &'a [u8])
-        -> Result<Self, BlockValidatorError>
+        -> Result<Self, SszBlockError>
     {
         let untrimmed_ssz = &vec[..];
         /*
@@ -55,19 +55,19 @@ impl<'a> SszBlock<'a> {
          * attestation record).
          */
         if vec.len() < MIN_SSZ_BLOCK_LENGTH + MIN_SSZ_ATTESTION_RECORD_LENGTH {
-            return Err(BlockValidatorError::TooShort);
+            return Err(SszBlockError::TooShort);
         }
         /*
          * Ensure the SSZ slice isn't longer than is possible for a block.
          */
         if vec.len() > MAX_SSZ_BLOCK_LENGTH {
-            return Err(BlockValidatorError::TooLong);
+            return Err(SszBlockError::TooLong);
         }
         /*
          * Determine how many bytes are used to store attestation records.
          */
         let attestation_len = decode_length(untrimmed_ssz, 72, LENGTH_BYTES)
-            .map_err(|_| BlockValidatorError::TooShort)?;
+            .map_err(|_| SszBlockError::TooShort)?;
         /*
          * The block only has one variable field, `attestations`, therefore
          * the size of the block must be the minimum size, plus the length
@@ -77,7 +77,7 @@ impl<'a> SszBlock<'a> {
             MIN_SSZ_BLOCK_LENGTH + attestation_len
         };
         if vec.len() < block_ssz_len {
-            return Err(BlockValidatorError::TooShort);
+            return Err(SszBlockError::TooShort);
         }
         Ok(Self{
             ssz: &untrimmed_ssz[0..block_ssz_len],
@@ -146,10 +146,12 @@ impl<'a> SszBlock<'a> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use super::super::structs::Block;
-    use super::super::attestation_record::AttestationRecord;
+    use super::super::types::{
+        AttestationRecord,
+        Block,
+    };
     use super::super::ssz::SszStream;
-    use super::super::utils::types::Hash256;
+    use super::super::types::Hash256;
 
     fn get_block_ssz(b: &Block) -> Vec<u8> {
         let mut ssz_stream = SszStream::new();
@@ -171,7 +173,7 @@ mod tests {
 
         assert_eq!(
             SszBlock::from_slice(&ssz[..]),
-            Err(BlockValidatorError::TooShort)
+            Err(SszBlockError::TooShort)
         );
     }
 
@@ -183,7 +185,7 @@ mod tests {
 
         assert_eq!(
             SszBlock::from_slice(&ssz[0..(ssz.len() - 1)]),
-            Err(BlockValidatorError::TooShort)
+            Err(SszBlockError::TooShort)
         );
     }
 

lighthouse/db/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "db"
+version = "0.1.0"
+authors = ["Paul Hauner <paul@paulhauner.com>"]
+
+[dependencies]
+bls = { path = "../../beacon_chain/utils/bls" }
+bytes = "0.4.10"
+rocksdb = "0.10.1"
+blake2-rfc = "0.2.18"

lighthouse/db/src/lib.rs

@@ -1,12 +1,12 @@
-extern crate rocksdb;
 extern crate blake2_rfc as blake2;
+extern crate bls;
+extern crate rocksdb;
 
 mod disk_db;
 mod memory_db;
 mod traits;
 pub mod stores;
 
-use super::bls;
 use self::stores::COLUMNS;
 
 pub use self::disk_db::DiskDB;

lighthouse/db/src/stores/block_store.rs

@@ -18,13 +18,13 @@ impl<T: ClientDB> BlockStore<T> {
         }
     }
 
-    pub fn put_block(&self, hash: &[u8], ssz: &[u8])
+    pub fn put_serialized_block(&self, hash: &[u8], ssz: &[u8])
         -> Result<(), DBError>
     {
         self.db.put(DB_COLUMN, hash, ssz)
     }
 
-    pub fn get_block(&self, hash: &[u8])
+    pub fn get_serialized_block(&self, hash: &[u8])
         -> Result<Option<Vec<u8>>, DBError>
     {
         self.db.get(DB_COLUMN, hash)
@@ -35,6 +35,13 @@ impl<T: ClientDB> BlockStore<T> {
     {
         self.db.exists(DB_COLUMN, hash)
     }
+
+    pub fn block_exists_in_canonical_chain(&self, hash: &[u8])
+        -> Result<bool, DBError>
+    {
+        // TODO: implement logic for canonical chain
+        self.db.exists(DB_COLUMN, hash)
+    }
 }
 
 #[cfg(test)]
@@ -63,7 +70,7 @@ mod tests {
                 for w in 0..wc {
                     let key = (t * w) as u8;
                     let val = 42;
-                    bs.put_block(&vec![key], &vec![val]).unwrap();
+                    bs.put_serialized_block(&vec![key], &vec![val]).unwrap();
                 }
             });
             handles.push(handle);
@@ -77,7 +84,7 @@ mod tests {
             for w in 0..write_count {
                 let key = (t * w) as u8;
                 assert!(bs.block_exists(&vec![key]).unwrap());
-                let val = bs.get_block(&vec![key]).unwrap().unwrap();
+                let val = bs.get_serialized_block(&vec![key]).unwrap().unwrap();
                 assert_eq!(vec![42], val);
             }
         }

lighthouse/main.rs

@@ -2,22 +2,14 @@
 extern crate slog;
 extern crate slog_term;
 extern crate slog_async;
-extern crate ssz;
+// extern crate ssz;
 extern crate clap;
 extern crate network_libp2p;
 extern crate futures;
 
-#[macro_use]
-#[allow(dead_code)]
-mod utils;
-#[allow(dead_code)]
-mod bls;
-#[allow(dead_code)]
-mod db;
+extern crate db;
+
 mod client;
-#[allow(dead_code)]
-mod state;
-#[allow(dead_code)]
 mod sync;
 mod config;
 

lighthouse/state/attestation_record/mod.rs

@@ -1,17 +0,0 @@
-use super::bls;
-use super::ssz;
-use super::utils;
-
-
-mod structs;
-mod ssz_splitter;
-
-pub use self::structs::{
-    AttestationRecord,
-    MIN_SSZ_ATTESTION_RECORD_LENGTH,
-};
-pub use self::ssz_splitter::{
-    split_all_attestations,
-    split_one_attestation,
-    AttestationSplitError,
-};

lighthouse/state/block/mod.rs

@@ -1,11 +0,0 @@
-extern crate blake2_rfc;
-
-use super::ssz;
-use super::utils;
-use super::attestation_record;
-
-mod structs;
-mod ssz_block;
-
-pub use self::structs::Block;
-pub use self::ssz_block::SszBlock;

lighthouse/state/common/attestation_parent_hashes.rs

@@ -1,226 +0,0 @@
-use super::Hash256;
-
-#[derive(Debug)]
-pub enum ParentHashesError {
-    BadCurrentHashes,
-    BadObliqueHashes,
-    SlotTooHigh,
-    SlotTooLow,
-    IntWrapping,
-}
-
-/// This function is used to select the hashes used in
-/// the signing of an AttestationRecord.
-///
-/// It either returns Result with a vector of length `cycle_length,` or
-/// returns an Error.
-///
-/// This function corresponds to the `get_signed_parent_hashes` function
-/// in the Python reference implentation.
-///
-/// See this slide for more information:
-/// https://tinyurl.com/ybzn2spw
-pub fn attestation_parent_hashes(
-    cycle_length: u8,
-    block_slot: u64,
-    attestation_slot: u64,
-    current_hashes: &[Hash256],
-    oblique_hashes: &[Hash256])
-    -> Result<Vec<Hash256>, ParentHashesError>
-{
-    // This cast places a limit on cycle_length. If you change it, check math
-    // for overflow.
-    let cycle_length: u64 = u64::from(cycle_length);
-
-    if current_hashes.len() as u64 != (cycle_length * 2) {
-        return Err(ParentHashesError::BadCurrentHashes);
-    }
-    if oblique_hashes.len() as u64 > cycle_length {
-        return Err(ParentHashesError::BadObliqueHashes);
-    }
-    if attestation_slot >= block_slot {
-        return Err(ParentHashesError::SlotTooHigh);
-    }
-
-    /*
-     * Cannot underflow as block_slot cannot be less
-     * than attestation_slot.
-     */
-    let attestation_distance = block_slot - attestation_slot;
-
-    if attestation_distance > cycle_length {
-        return Err(ParentHashesError::SlotTooLow);
-    }
-
-    /*
-     * Cannot underflow because attestation_distance cannot
-     * be larger than cycle_length.
-     */
-    let start = cycle_length - attestation_distance;
-
-    /*
-     * Overflow is potentially impossible, but proof is complicated
-     * enough to just use checked math.
-     *
-     * Arithmetic is:
-     * start + cycle_length - oblique_hashes.len()
-     */
-    let end = start.checked_add(cycle_length)
-        .and_then(|x| x.checked_sub(oblique_hashes.len() as u64))
-        .ok_or(ParentHashesError::IntWrapping)?;
-
-
-    let mut hashes = Vec::new();
-    hashes.extend_from_slice(
-        &current_hashes[(start as usize)..(end as usize)]);
-    hashes.extend_from_slice(oblique_hashes);
-
-    Ok(hashes)
-}
-
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    fn get_range_of_hashes(from: usize, to: usize) -> Vec<Hash256> {
-        (from..to).map(|i| get_hash(&vec![i as u8])).collect()
-    }
-
-    fn get_hash(value: &[u8]) -> Hash256 {
-        Hash256::from_slice(value)
-    }
-
-    #[test]
-    fn test_get_signed_hashes_oblique_scenario_1() {
-        /*
-         * Two oblique hashes.
-         */
-        let cycle_length: u8 = 8;
-        let block_slot: u64 = 19;
-        let attestation_slot: u64 = 15;
-        let current_hashes = get_range_of_hashes(3, 19);
-        let oblique_hashes = get_range_of_hashes(100, 102);
-        let result = attestation_parent_hashes(
-            cycle_length,
-            block_slot,
-            attestation_slot,
-            &current_hashes,
-            &oblique_hashes);
-        assert!(result.is_ok());
-        let result = result.unwrap();
-        assert_eq!(result.len(), cycle_length as usize);
-
-        let mut expected_result = get_range_of_hashes(7, 13);
-        expected_result.append(&mut get_range_of_hashes(100, 102));
-        assert_eq!(result, expected_result);
-    }
-
-    #[test]
-    fn test_get_signed_hashes_oblique_scenario_2() {
-        /*
-         * All oblique hashes.
-         */
-        let cycle_length: u8 = 8;
-        let block_slot: u64 = 19;
-        let attestation_slot: u64 = 15;
-        let current_hashes = get_range_of_hashes(3, 19);
-        let oblique_hashes = get_range_of_hashes(100, 108);
-        let result = attestation_parent_hashes(
-            cycle_length,
-            block_slot,
-            attestation_slot,
-            &current_hashes,
-            &oblique_hashes);
-        assert!(result.is_ok());
-        let result = result.unwrap();
-        assert_eq!(result.len(), cycle_length as usize);
-
-        let expected_result = get_range_of_hashes(100, 108);
-        assert_eq!(result, expected_result);
-    }
-
-    #[test]
-    fn test_get_signed_hashes_scenario_1() {
-        /*
-         * Google Slides example.
-         * https://tinyurl.com/ybzn2spw
-         */
-        let cycle_length: u8 = 8;
-        let block_slot: u64 = 19;
-        let attestation_slot: u64 = 15;
-        let current_hashes = get_range_of_hashes(3, 19);
-        let oblique_hashes = vec![];
-        let result = attestation_parent_hashes(
-            cycle_length,
-            block_slot,
-            attestation_slot,
-            &current_hashes,
-            &oblique_hashes);
-        assert!(result.is_ok());
-        let result = result.unwrap();
-        assert_eq!(result.len(), cycle_length as usize);
-        let expected_result = get_range_of_hashes(7, 15);
-        assert_eq!(result, expected_result);
-    }
-
-    #[test]
-    fn test_get_signed_hashes_scenario_2() {
-        /*
-         * Block 1, attestation 0.
-         */
-        let cycle_length: u8 = 8;
-        let block_slot: u64 = 1;
-        let attestation_slot: u64 = 0;
-        let current_hashes = get_range_of_hashes(0, 16);
-        let oblique_hashes = vec![];
-        let result = attestation_parent_hashes(
-            cycle_length,
-            block_slot,
-            attestation_slot,
-            &current_hashes,
-            &oblique_hashes);
-        let result = result.unwrap();
-        assert_eq!(result.len(), cycle_length as usize);
-        let expected_result = get_range_of_hashes(7, 15);
-        assert_eq!(result, expected_result);
-    }
-
-    #[test]
-    fn test_get_signed_hashes_scenario_3() {
-        /*
-         * attestation_slot too large
-         */
-        let cycle_length: u8 = 8;
-        let block_slot: u64 = 100;
-        let attestation_slot: u64 = 100;
-        let current_hashes = get_range_of_hashes(0, 16);
-        let oblique_hashes = vec![];
-        let result = attestation_parent_hashes(
-            cycle_length,
-            block_slot,
-            attestation_slot,
-            &current_hashes,
-            &oblique_hashes);
-        assert!(result.is_err());
-    }
-
-    #[test]
-    fn test_get_signed_hashes_scenario_4() {
-        /*
-         * Current hashes too small
-         */
-        let cycle_length: u8 = 8;
-        let block_slot: u64 = 100;
-        let attestation_slot: u64 = 99;
-        let current_hashes = get_range_of_hashes(0, 15);
-        let oblique_hashes = vec![];
-        let result = attestation_parent_hashes(
-            cycle_length,
-            block_slot,
-            attestation_slot,
-            &current_hashes,
-            &oblique_hashes);
-        assert!(result.is_err());
-    }
-}

lighthouse/utils/errors.rs

@@ -1,8 +0,0 @@
-// Collection of custom errors
-
-#[derive(Debug,PartialEq)]
-pub enum ParameterError {
-    IntWrapping,
-    OutOfBounds,
-    InvalidInput(String),
-}

lighthouse/utils/logging.rs

@@ -1,22 +0,0 @@
-extern crate slog;
-extern crate slog_term;
-extern crate slog_async;
-
-use slog::*;
-pub use slog::Logger;
-
-pub fn test_logger() -> slog::Logger {
-    let plain = slog_term::PlainSyncDecorator::new(slog_term::TestStdoutWriter);
-    Logger::root(
-        slog_term::FullFormat::new(plain)
-        .build().fuse(), o!()
-    )
-}
-
-pub fn get_logger() -> slog::Logger {
-    let decorator = slog_term::TermDecorator::new().build();
-    let drain = slog_term::CompactFormat::new(decorator).build().fuse();
-    let drain = slog_async::Async::new(drain).build().fuse();
-
-    slog::Logger::root(drain, o!())
-}

lighthouse/utils/macros.rs

@@ -1,8 +0,0 @@
-#[macro_export]
-macro_rules! assert_error {
-    ($exp: expr, $err: expr) => {
-        if !$exp {
-            return Err($err);
-        }
-    }
-}

lighthouse/utils/mod.rs

@@ -1,11 +0,0 @@
-extern crate ethereum_types;
-extern crate blake2_rfc as blake2;
-extern crate crypto_mac;
-extern crate boolean_bitfield;
-
-#[macro_use]
-pub mod macros;
-pub mod hash;
-pub mod types;
-pub mod logging;
-pub mod errors;

lighthouse/utils/types.rs

@@ -1,12 +0,0 @@
-extern crate boolean_bitfield;
-
-use super::ethereum_types::{ H256, H160 };
-use self::boolean_bitfield::BooleanBitfield;
-
-pub use super::ethereum_types::U256;
-
-pub type Hash256 = H256;
-
-pub type Address = H160;
-
-pub type Bitfield = BooleanBitfield;