some lib changes

common/Cargo.toml

@@ -12,3 +12,7 @@ rsa = "0.9.8"
 x25519-dalek = "2.0.1"
 ed25519-dalek = {version="2.1.1", features=["rand_core", "serde", "pkcs8", "alloc", "pem", "std"]}
 rand = "0.9.1"
+socket2 = "0.5.9"
+serde = { version = "1.0", features = ["derive"] }
+serde-big-array = "0.5"
+postcard = "1.0.0"

common/src/lib.rs

@@ -1,14 +1,20 @@
-pub fn add(left: u64, right: u64) -> u64 {
-    left + right
+// always use the following derive flags: #[derive(Deserialize, Serialize, Type, PartialEq, Debug)]
+
+use serde::{Deserialize, Serialize};
+use serde_big_array::BigArray;
+const CHALLENGE_DIFF: usize = 40;
+const SHA_LENGTH: usize = 512;
+const BITS_IN_BYTE: usize = 8;
+#[derive(Deserialize, Serialize, PartialEq, Debug)]
+pub struct PowChallengeQuery{
+    #[serde(with = "BigArray")]
+    hash: [u8;SHA_LENGTH/BITS_IN_BYTE],
 }
+#[derive(Deserialize, Serialize, PartialEq, Debug)]
+pub struct PowChallengeResponse{
+    #[serde(with = "BigArray")]
+    hash: [u8; SHA_LENGTH/BITS_IN_BYTE],
+    #[serde(with = "BigArray")]
+    secret: [u8; CHALLENGE_DIFF/BITS_IN_BYTE],
 
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
-    }
 }