RPC & Client (#21)

* Initial version of http server.

* Refactor the structure.

* add unassigned ports info.

* Rename servers to match conventions.

* Add client crate and some proper RPC implementations.

* Style & docs.

substrate/primitives/src/block.rs

@@ -49,7 +49,6 @@ pub struct Body {
 	pub para_blocks: Vec<parachain::Proposal>,
 }
 
-
 #[cfg(test)]
 mod tests {
 	use super::*;

substrate/primitives/src/contract.rs

@@ -25,3 +25,7 @@ pub struct CallData(#[serde(with="bytes")] pub Vec<u8>);
 /// Contract output data.
 #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct OutData(#[serde(with="bytes")] pub Vec<u8>);
+
+/// Contract storage entry data.
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub struct StorageData(#[serde(with="bytes")] pub Vec<u8>);

substrate/primitives/src/lib.rs

@@ -49,6 +49,8 @@ pub mod validator;
 
 /// Alias to 160-bit hash when used in the context of an account address.
 pub type Address = hash::H160;
+pub use self::hash::{H160, H256};
+pub use self::uint::{U256, U512};
 
 /// A hash function.
 pub fn hash(data: &[u8]) -> hash::H256 {