Rename beacon_chain/ -> eth2/

eth2/utils/ssz/src/lib.rs

@@ -0,0 +1,33 @@
+/*
+ * This is a WIP of implementing an alternative
+ * serialization strategy. It attempts to follow Vitalik's
+ * "simpleserialize" format here:
+ * https://github.com/ethereum/beacon_chain/blob/master/beacon_chain/utils/simpleserialize.py
+ *
+ * This implementation is not final and would almost certainly
+ * have issues.
+ */
+extern crate bytes;
+extern crate ethereum_types;
+
+pub mod decode;
+pub mod encode;
+
+mod impl_decode;
+mod impl_encode;
+
+pub use crate::decode::{decode_ssz, decode_ssz_list, Decodable, DecodeError};
+pub use crate::encode::{Encodable, SszStream};
+
+pub const LENGTH_BYTES: usize = 4;
+pub const MAX_LIST_SIZE: usize = 1 << (4 * 8);
+
+/// Convenience function to SSZ encode an object supporting ssz::Encode.
+pub fn ssz_encode<T>(val: &T) -> Vec<u8>
+where
+    T: Encodable,
+{
+    let mut ssz_stream = SszStream::new();
+    ssz_stream.append(val);
+    ssz_stream.drain()
+}