fake sig back, merge, and fixed up yml checkin issue

eth2/state_processing/Cargo.toml

@@ -29,3 +29,6 @@ tree_hash = { path = "../utils/tree_hash" }
 tree_hash_derive = { path = "../utils/tree_hash_derive" }
 types = { path = "../types" }
 rayon = "1.0"
+
+[features]
+fake_crypto = ["bls/fake_crypto"]

eth2/state_processing/src/per_block_processing/block_processing_builder.rs

@@ -1,14 +1,15 @@
 use types::test_utils::{TestingBeaconBlockBuilder, TestingBeaconStateBuilder};
 use types::*;
+use tree_hash::SignedRoot;
 
-pub struct BlockProcessingBuilder {
-    pub state_builder: TestingBeaconStateBuilder,
+pub struct BlockProcessingBuilder<T: EthSpec> {
+    pub state_builder: TestingBeaconStateBuilder<T>,
     pub block_builder: TestingBeaconBlockBuilder,
 
     pub num_validators: usize,
 }
 
-impl BlockProcessingBuilder {
+impl<T: EthSpec> BlockProcessingBuilder<T> {
     pub fn new(num_validators: usize, spec: &ChainSpec) -> Self {
         let state_builder =
             TestingBeaconStateBuilder::from_default_keypairs_file_if_exists(num_validators, &spec);
@@ -30,12 +31,17 @@ impl BlockProcessingBuilder {
         self.state_builder.build_caches(&spec).unwrap();
     }
 
-    pub fn build(mut self, randao_sk: Option<SecretKey>, spec: &ChainSpec) -> (BeaconBlock, BeaconState) {
+    pub fn build(mut self, randao_sk: Option<SecretKey>, previous_block_root: Option<Hash256>, spec: &ChainSpec) -> (BeaconBlock, BeaconState<T>) {
         let (state, keypairs) = self.state_builder.build();
         let builder = &mut self.block_builder;
 
         builder.set_slot(state.slot);
 
+        match previous_block_root {
+            Some(root) => builder.set_previous_block_root(root),
+            None => builder.set_previous_block_root(Hash256::from_slice(&state.latest_block_header.signed_root())),
+        }
+
         let proposer_index = state
             .get_beacon_proposer_index(state.slot, RelativeEpoch::Current, spec)
             .unwrap();

eth2/state_processing/src/per_block_processing/tests.rs

@@ -1,17 +1,17 @@
-#![cfg(test)]
+#![cfg(all(test, not(feature = "fake_crypto")))]
 use super::block_processing_builder::BlockProcessingBuilder;
 use super::errors::*;
 use crate::per_block_processing;
-use ssz::SignedRoot;
-use types::{ChainSpec, Domain, Keypair, Signature, Slot};
+use tree_hash::SignedRoot;
+use types::*;
 
 pub const VALIDATOR_COUNT: usize = 10;
 
 #[test]
 fn valid_block_ok() {
-    let spec = ChainSpec::foundation();
+    let spec = FoundationEthSpec::spec();
     let builder = get_builder(&spec);
-    let (block, mut state) = builder.build(None, &spec);
+    let (block, mut state) = builder.build(None, None, &spec);
 
     let result = per_block_processing(&mut state, &block, &spec);
 
@@ -20,9 +20,9 @@ fn valid_block_ok() {
 
 #[test]
 fn invalid_block_header_state_slot() {
-    let spec = ChainSpec::foundation();
+    let spec = FoundationEthSpec::spec();
     let builder = get_builder(&spec);
-    let (mut block, mut state) = builder.build(None, &spec);
+    let (mut block, mut state) = builder.build(None, None, &spec);
 
     state.slot = Slot::new(133713);
     block.slot = Slot::new(424242);
@@ -38,16 +38,30 @@ fn invalid_block_header_state_slot() {
 }
 
 #[test]
-#[ignore]
 fn invalid_parent_block_root() {
-    // this will be changed in spec 0.5.1 to use signed root
+    let spec = FoundationEthSpec::spec();
+    let builder = get_builder(&spec);
+    let invalid_parent_root = Hash256::from([0xAA; 32]);
+    let (block, mut state) = builder.build(None, Some(invalid_parent_root), &spec);
+
+    let result = per_block_processing(&mut state, &block, &spec);
+
+    assert_eq!(
+        result,
+        Err(BlockProcessingError::Invalid(
+            BlockInvalid::ParentBlockRootMismatch{
+                state: Hash256::from_slice(&state.latest_block_header.signed_root()), 
+                block: block.previous_block_root
+            }
+        ))
+    );
 }
 
 #[test]
 fn invalid_block_signature() {
-    let spec = ChainSpec::foundation();
+    let spec = FoundationEthSpec::spec();
     let builder = get_builder(&spec);
-    let (mut block, mut state) = builder.build(None, &spec);
+    let (mut block, mut state) = builder.build(None, None, &spec);
 
     // sign the block with a keypair that is not the expected proposer
     let keypair = Keypair::random();
@@ -68,12 +82,12 @@ fn invalid_block_signature() {
 
 #[test]
 fn invalid_randao_reveal_signature() {
-    let spec = ChainSpec::foundation();
+    let spec = FoundationEthSpec::spec();
     let builder = get_builder(&spec);
 
     // sign randao reveal with random keypair
     let keypair = Keypair::random();
-    let (block, mut state) = builder.build(Some(keypair.sk), &spec);
+    let (block, mut state) = builder.build(Some(keypair.sk), None, &spec);
     
     let result = per_block_processing(&mut state, &block, &spec);
 
@@ -84,7 +98,7 @@ fn invalid_randao_reveal_signature() {
     );
 }
 
-fn get_builder(spec: &ChainSpec) -> (BlockProcessingBuilder) {
+fn get_builder(spec: &ChainSpec) -> (BlockProcessingBuilder<FoundationEthSpec>) {
     let mut builder = BlockProcessingBuilder::new(VALIDATOR_COUNT, &spec);
 
     // Set the state and block to be in the last slot of the 4th epoch.

eth2/types/src/test_utils/testing_beacon_block_builder.rs

@@ -23,6 +23,11 @@ impl TestingBeaconBlockBuilder {
         }
     }
 
+    /// Set the previous block root
+    pub fn set_previous_block_root(&mut self, root: Hash256) {
+        self.block.previous_block_root = root;
+    }
+
     /// Set the slot of the block.
     pub fn set_slot(&mut self, slot: Slot) {
         self.block.slot = slot;

eth2/utils/bls/src/fake_signature.rs

@@ -14,6 +14,7 @@ use tree_hash::tree_hash_ssz_encoding_as_vector;
 #[derive(Debug, PartialEq, Clone, Eq)]
 pub struct FakeSignature {
     bytes: Vec<u8>,
+    is_empty: bool,
 }
 
 impl FakeSignature {
@@ -26,6 +27,7 @@ impl FakeSignature {
     pub fn zero() -> Self {
         Self {
             bytes: vec![0; BLS_SIG_BYTE_SIZE],
+            is_empty: true,
         }
     }
 
@@ -59,6 +61,7 @@ impl FakeSignature {
         } else {
             Ok(Self {
                 bytes: bytes.to_vec(),
+                is_empty: false,
             })
         }
     }
@@ -71,6 +74,11 @@ impl FakeSignature {
     pub fn empty_signature() -> Self {
         FakeSignature::zero()
     }
+
+    // Check for empty Signature
+    pub fn is_empty(&self) -> bool {
+        self.is_empty
+    }
 }
 
 impl_ssz!(FakeSignature, BLS_SIG_BYTE_SIZE, "FakeSignature");