Add pubkeystore mod

src/lib.rs

@@ -1,5 +1,6 @@
 #[macro_use]
 extern crate slog;
 
+pub mod pubkeystore;
 pub mod state;
 pub mod utils;

src/pubkeystore/mod.rs

@@ -0,0 +1,7 @@
+use super::state::block::Block;
+
+#[allow(unused_variables)]
+pub fn verify_block(block: &Block, proposer: &usize) -> bool {
+    // TODO: fetch proposer pubkey and verify it.
+    return true;
+}

src/state/mod.rs

@@ -4,6 +4,7 @@ extern crate blake2;
 extern crate bytes;
 
 use super::utils;
+use super::pubkeystore;
 
 pub mod active_state;
 pub mod crystallized_state;