Add whiteblock script, CLI options to support it

eth2/types/src/test_utils/generate_deterministic_keypairs.rs

@@ -1,7 +1,8 @@
 use crate::*;
-use eth2_interop_keypairs::keypair;
+use eth2_interop_keypairs::{keypair, keypairs_from_yaml_file};
 use log::debug;
 use rayon::prelude::*;
+use std::path::PathBuf;
 
 /// Generates `validator_count` keypairs where the secret key is derived solely from the index of
 /// the validator.
@@ -32,3 +33,14 @@ pub fn generate_deterministic_keypair(validator_index: usize) -> Keypair {
         sk: SecretKey::from_raw(raw.sk),
     }
 }
+
+/// Loads a list of keypairs from file.
+pub fn load_keypairs_from_yaml(path: PathBuf) -> Result<Vec<Keypair>, String> {
+    Ok(keypairs_from_yaml_file(path)?
+        .into_iter()
+        .map(|raw| Keypair {
+            pk: PublicKey::from_raw(raw.pk),
+            sk: SecretKey::from_raw(raw.sk),
+        })
+        .collect())
+}

eth2/types/src/test_utils/mod.rs

@@ -8,6 +8,7 @@ mod test_random;
 pub use builders::*;
 pub use generate_deterministic_keypairs::generate_deterministic_keypair;
 pub use generate_deterministic_keypairs::generate_deterministic_keypairs;
+pub use generate_deterministic_keypairs::load_keypairs_from_yaml;
 pub use keypairs_file::KeypairsFile;
 pub use rand::{
     RngCore,