refactor: remove dead DIPs cancel and collect endpoints

crates/dips/build.rs

@@ -13,13 +13,5 @@ fn main() {
             .protoc_arg("--experimental_allow_proto3_optional")
             .compile_protos(&["proto/indexer.proto"], &["proto/"])
             .expect("Failed to compile DIPs indexer RPC proto(s)");
-
-        tonic_prost_build::configure()
-            .build_server(true)
-            .out_dir("src/proto")
-            .include_file("gateway.rs")
-            .protoc_arg("--experimental_allow_proto3_optional")
-            .compile_protos(&["proto/gateway.proto"], &["proto"])
-            .expect("Failed to compile DIPs gateway RPC proto(s)");
     }
 }

crates/dips/proto/indexer.proto

@@ -9,11 +9,6 @@ service IndexerDipsService {
    * The _indexer_ can `ACCEPT` or `REJECT` the agreement.
    */
   rpc SubmitAgreementProposal(SubmitAgreementProposalRequest) returns (SubmitAgreementProposalResponse);
-
-  /**
-   * Request to cancel an existing _indexing agreement_.
-   */
-  rpc CancelAgreement(CancelAgreementRequest) returns (CancelAgreementResponse);
 }
 
 /**
@@ -23,7 +18,7 @@ service IndexerDipsService {
  */
 message SubmitAgreementProposalRequest {
   uint64 version = 1;
-  bytes signed_voucher = 2; /// An ERC-712 signed indexing agreement voucher
+  bytes signed_rca = 2; /// ABI-encoded SignedRCA (RecurringCollectionAgreement plus signature).
 }
 
 /**
@@ -60,22 +55,3 @@ enum RejectReason {
   REJECT_REASON_AGREEMENT_EXPIRED = 8;        /// The agreement end time has already passed.
   REJECT_REASON_UNSUPPORTED_METADATA_VERSION = 9;  /// The metadata version is not supported.
 }
-
-/**
- * A request to cancel an _indexing agreement_.
- *
- * See the `DipsService.CancelAgreement` method.
- */
-message CancelAgreementRequest {
-  uint64 version = 1;
-  bytes signed_cancellation = 2;  /// a signed ERC-712 message cancelling an agreement
-}
-
-/**
- * A response to a request to cancel an existing _indexing agreement_.
- *
- * See the `DipsService.CancelAgreement` method.
- */
-message CancelAgreementResponse {
-  // Empty message, eventually we may add custom status codes
-}