feat(dips): implement error reporting

crates/dips/src/lib.rs

@@ -34,6 +34,9 @@ const CHAIN_ID_ARBITRUM_ONE: ChainId = 0xa4b1; // 42161
 const EIP712_DOMAIN_SALT: B256 =
     b256!("b4632c657c26dce5d4d7da1d65bda185b14ff8f905ddbb03ea0382ed06c5ef28");
 
+/// DIPs Protocol version
+pub const PROTOCOL_VERSION: u64 = 1; // MVP
+
 /// Create an EIP-712 domain given a chain ID and dispute manager address.
 pub fn dips_agreement_eip712_domain() -> Eip712Domain {
     eip712_domain! {
@@ -132,7 +135,7 @@ sol! {
 
 #[derive(Error, Debug)]
 pub enum DipsError {
-    // agreement cration
+    // agreement creation
     #[error("signature is not valid, error: {0}")]
     InvalidSignature(String),
     #[error("payer {0} not authorised")]
@@ -167,11 +170,10 @@ pub enum DipsError {
     InvalidVoucher(String),
 }
 
-// TODO: send back messages
 #[cfg(feature = "rpc")]
 impl From<DipsError> for tonic::Status {
-    fn from(_val: DipsError) -> Self {
-        tonic::Status::internal("unknown errr")
+    fn from(value: DipsError) -> Self {
+        tonic::Status::internal(format!("{}", value))
     }
 }
 

crates/dips/src/server.rs

@@ -19,7 +19,7 @@ use crate::{
     },
     signers::SignerValidator,
     store::AgreementStore,
-    validate_and_cancel_agreement, validate_and_create_agreement,
+    validate_and_cancel_agreement, validate_and_create_agreement, PROTOCOL_VERSION,
 };
 
 #[derive(Debug)]
@@ -78,7 +78,7 @@ impl IndexerDipsService for DipsServer {
         } = request.into_inner();
 
         // Ensure the version is 1
-        if version != 1 {
+        if version != PROTOCOL_VERSION {
             return Err(Status::invalid_argument("invalid version"));
         }
 
@@ -93,10 +93,9 @@ impl IndexerDipsService for DipsServer {
             &self.allowed_payers,
             signed_voucher,
         )
-        .await
-        .map_err(Into::<tonic::Status>::into)?;
+        .await?;
 
-        Ok(tonic::Response::new(SubmitAgreementProposalResponse {
+        Ok(Response::new(SubmitAgreementProposalResponse {
             response: ProposalResponse::Accept.into(),
         }))
     }