wip: use cleaner protocol

src/client/error.rs

@@ -1,9 +1,19 @@
-#[derive(Debug, Eq, PartialEq)]
+use thiserror::Error;
+
+#[derive(Error, Debug, PartialEq, Eq)]
 pub enum Error {
+    #[error("Block already verified")]
     BlockAlreadyVerified,
+    #[error("Block not current or next epoch")]
     BlockNotCurrentOrNextEpoch,
-    BlockMissingNextBps,
+    #[error("Signature invalid")]
     SignatureInvalid,
+    #[error("Not enough approved stake")]
     NotEnoughApprovedStake,
+    #[error("Block is in the next epoch but no new set")]
     NextBpsInvalid,
+    #[error("Signature len mismatch")]
+    SignatureLenMismatch,
+    #[error("Invalid proof")]
+    InvalidProof,
 }