refactor(block-producer): yank gRPC service

crates/block-producer/Cargo.toml

@@ -26,18 +26,14 @@ anyhow                     = { workspace = true }
 futures                    = { workspace = true }
 itertools                  = { workspace = true }
 miden-node-proto           = { workspace = true }
-miden-node-proto-build     = { features = ["internal"], workspace = true }
 miden-node-utils           = { features = ["testing"], workspace = true }
 miden-protocol             = { default-features = true, workspace = true }
 miden-remote-prover-client = { features = ["batch-prover", "block-prover"], workspace = true }
 miden-tx-batch-prover      = { workspace = true }
 rand                       = { workspace = true }
 thiserror                  = { workspace = true }
 tokio                      = { features = ["macros", "net", "rt-multi-thread"], workspace = true }
-tokio-stream               = { features = ["net"], workspace = true }
 tonic                      = { default-features = true, features = ["transport"], workspace = true }
-tonic-reflection           = { workspace = true }
-tower-http                 = { features = ["util"], workspace = true }
 tracing                    = { workspace = true }
 url                        = { workspace = true }
 

crates/block-producer/README.md

@@ -3,14 +3,14 @@
 Contains code defining the [Miden node's block-producer](/README.md#architecture) component. It is responsible for
 ordering transactions into blocks and submitting these for inclusion in the blockchain.
 
-It serves a small [gRPC](https://grpc.io) API which the node's RPC component uses to submit new transactions. In turn,
-the `block-producer` uses the store's gRPC API to submit blocks and query chain state.
+It exposes an in-process API which the node's RPC component uses to submit new transactions. In turn, the
+`block-producer` uses the store's gRPC API to submit blocks and query chain state.
 
 For more information on the installation and operation of this component, please see the [node's readme](../../README.md).
 
 ## API
 
-The full gRPC API can be found [here](../../proto/proto/block_producer.proto).
+The API is exposed by `BlockProducerApi`.
 
 ---
 

crates/block-producer/src/errors.rs

@@ -77,6 +77,9 @@ pub enum MempoolSubmissionError {
     #[error("mempool lock is poisoned")]
     #[grpc(internal)]
     MempoolPoisoned(#[source] MempoolPoisonError),
+
+    #[error("missing proposed batch")]
+    MissingProposedBatch,
 }
 
 // Mempool submission conflicts with current state

crates/block-producer/src/lib.rs

@@ -18,7 +18,8 @@ pub mod errors;
 mod errors;
 
 pub mod server;
-pub use server::BlockProducer;
+pub use errors::MempoolSubmissionError;
+pub use server::{BlockProducer, BlockProducerApi, BlockProducerApiConfig, BlockProducerRuntime};
 
 // CONSTANTS
 // =================================================================================================

crates/block-producer/src/mempool/mod.rs

@@ -84,7 +84,7 @@ mod tests;
 // MEMPOOL CONFIGURATION
 // ================================================================================================
 
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub struct SharedMempool(Arc<Mutex<Mempool>>);
 
 #[derive(Debug, Error, Clone, Copy, PartialEq, Eq)]