cuprated: internal signatures required for RPC (#297)

* add request methods

* add p2p messages

* add txpool msgs

* add blockchain_context msgs

* add blockchain msgs

* fmt

* blockchain_manager msgs

* blockchain manager msg types

* add DB fn signatures

* add statics module

* p2p msg changes, docs

* txpool docs/types

* blockchain docs/types

* `AlternateChains`, docs

* fixes

* remove blockchain write handle, fix docs

* remove `BlockchainReadRequest::Difficulty`

* remove `BlockchainReadRequest::MinerData`

* fix p2p ban types

* `CurrentRxVm` -> `CurrentRxVms`

* storage: remove `Clone` off write handle

* Update p2p/p2p-core/src/ban.rs

Co-authored-by: Boog900 <boog900@tutanota.com>

* fix merge

---------

Co-authored-by: Boog900 <boog900@tutanota.com>

binaries/cuprated/src/blockchain/manager.rs

@@ -69,7 +69,7 @@ pub async fn init_blockchain_manager(
         .ready()
         .await
         .expect(PANIC_CRITICAL_SERVICE_ERROR)
-        .call(BlockChainContextRequest::GetContext)
+        .call(BlockChainContextRequest::Context)
         .await
         .expect(PANIC_CRITICAL_SERVICE_ERROR)
     else {

binaries/cuprated/src/blockchain/manager/handler.rs

@@ -464,7 +464,7 @@ impl super::BlockchainManager {
             .ready()
             .await
             .expect(PANIC_CRITICAL_SERVICE_ERROR)
-            .call(BlockChainContextRequest::GetContext)
+            .call(BlockChainContextRequest::Context)
             .await
             .expect(PANIC_CRITICAL_SERVICE_ERROR)
         else {

binaries/cuprated/src/blockchain/syncer.rs

@@ -62,7 +62,7 @@ where
     let BlockChainContextResponse::Context(mut blockchain_ctx) = context_svc
         .ready()
         .await?
-        .call(BlockChainContextRequest::GetContext)
+        .call(BlockChainContextRequest::Context)
         .await?
     else {
         unreachable!();
@@ -131,7 +131,7 @@ where
     }
 
     let BlockChainContextResponse::Context(ctx) = context_svc
-        .oneshot(BlockChainContextRequest::GetContext)
+        .oneshot(BlockChainContextRequest::Context)
         .await?
     else {
         unreachable!();

binaries/cuprated/src/main.rs

@@ -3,6 +3,7 @@
 #![allow(
     unused_imports,
     unreachable_pub,
+    unreachable_code,
     unused_crate_dependencies,
     dead_code,
     unused_variables,

binaries/cuprated/src/rpc.rs

@@ -6,5 +6,6 @@ mod bin;
 mod handler;
 mod json;
 mod other;
+mod request;
 
-pub use handler::{CupratedRpcHandler, CupratedRpcHandlerState};
+pub use handler::CupratedRpcHandler;

binaries/cuprated/src/rpc/bin.rs

@@ -10,11 +10,11 @@ use cuprate_rpc_types::{
     json::{GetOutputDistributionRequest, GetOutputDistributionResponse},
 };
 
-use crate::rpc::CupratedRpcHandlerState;
+use crate::rpc::CupratedRpcHandler;
 
 /// Map a [`BinRequest`] to the function that will lead to a [`BinResponse`].
 pub(super) async fn map_request(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: BinRequest,
 ) -> Result<BinResponse, Error> {
     use BinRequest as Req;
@@ -36,49 +36,49 @@ pub(super) async fn map_request(
 }
 
 async fn get_blocks(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetBlocksRequest,
 ) -> Result<GetBlocksResponse, Error> {
     todo!()
 }
 
 async fn get_blocks_by_height(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetBlocksByHeightRequest,
 ) -> Result<GetBlocksByHeightResponse, Error> {
     todo!()
 }
 
 async fn get_hashes(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetHashesRequest,
 ) -> Result<GetHashesResponse, Error> {
     todo!()
 }
 
 async fn get_output_indexes(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetOutputIndexesRequest,
 ) -> Result<GetOutputIndexesResponse, Error> {
     todo!()
 }
 
 async fn get_outs(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetOutsRequest,
 ) -> Result<GetOutsResponse, Error> {
     todo!()
 }
 
 async fn get_transaction_pool_hashes(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetTransactionPoolHashesRequest,
 ) -> Result<GetTransactionPoolHashesResponse, Error> {
     todo!()
 }
 
 async fn get_output_distribution(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetOutputDistributionRequest,
 ) -> Result<GetOutputDistributionResponse, Error> {
     todo!()

binaries/cuprated/src/rpc/handler.rs

@@ -3,51 +3,131 @@
 use std::task::{Context, Poll};
 
 use anyhow::Error;
-use futures::{channel::oneshot::channel, future::BoxFuture};
+use futures::future::BoxFuture;
-use serde::{Deserialize, Serialize};
+use monero_serai::block::Block;
 use tower::Service;
 
-use cuprate_blockchain::service::BlockchainReadHandle;
+use cuprate_blockchain::service::{BlockchainReadHandle, BlockchainWriteHandle};
-use cuprate_helper::asynch::InfallibleOneshotReceiver;
-use cuprate_json_rpc::Id;
 use cuprate_rpc_interface::RpcHandler;
 use cuprate_rpc_types::{
     bin::{BinRequest, BinResponse},
     json::{JsonRpcRequest, JsonRpcResponse},
     other::{OtherRequest, OtherResponse},
 };
-use cuprate_txpool::service::TxpoolReadHandle;
+use cuprate_txpool::service::{TxpoolReadHandle, TxpoolWriteHandle};
 
 use crate::rpc::{bin, json, other};
 
+/// TODO: use real type when public.
+#[derive(Clone)]
+#[expect(clippy::large_enum_variant)]
+pub enum BlockchainManagerRequest {
+    /// Pop blocks off the top of the blockchain.
+    ///
+    /// Input is the amount of blocks to pop.
+    PopBlocks { amount: usize },
+
+    /// Start pruning the blockchain.
+    Prune,
+
+    /// Is the blockchain pruned?
+    Pruned,
+
+    /// Relay a block to the network.
+    RelayBlock(Block),
+
+    /// Is the blockchain in the middle of syncing?
+    ///
+    /// This returning `false` does not necessarily
+    /// mean [`BlockchainManagerRequest::Synced`] will
+    /// return `true`, for example, if the network has been
+    /// cut off and we have no peers, this will return `false`,
+    /// however, [`BlockchainManagerRequest::Synced`] may return
+    /// `true` if the latest known chain tip is equal to our height.
+    Syncing,
+
+    /// Is the blockchain fully synced?
+    Synced,
+
+    /// Current target block time.
+    Target,
+
+    /// The height of the next block in the chain.
+    TargetHeight,
+}
+
+/// TODO: use real type when public.
+#[derive(Clone)]
+pub enum BlockchainManagerResponse {
+    /// General OK response.
+    ///
+    /// Response to:
+    /// - [`BlockchainManagerRequest::Prune`]
+    /// - [`BlockchainManagerRequest::RelayBlock`]
+    Ok,
+
+    /// Response to [`BlockchainManagerRequest::PopBlocks`]
+    PopBlocks { new_height: usize },
+
+    /// Response to [`BlockchainManagerRequest::Pruned`]
+    Pruned(bool),
+
+    /// Response to [`BlockchainManagerRequest::Syncing`]
+    Syncing(bool),
+
+    /// Response to [`BlockchainManagerRequest::Synced`]
+    Synced(bool),
+
+    /// Response to [`BlockchainManagerRequest::Target`]
+    Target(std::time::Duration),
+
+    /// Response to [`BlockchainManagerRequest::TargetHeight`]
+    TargetHeight { height: usize },
+}
+
+/// TODO: use real type when public.
+pub type BlockchainManagerHandle = cuprate_database_service::DatabaseReadService<
+    BlockchainManagerRequest,
+    BlockchainManagerResponse,
+>;
+
 /// TODO
 #[derive(Clone)]
 pub struct CupratedRpcHandler {
     /// Should this RPC server be [restricted](RpcHandler::restricted)?
-    //
+    ///
-    // INVARIANT:
+    /// This is not `pub` on purpose, as it should not be mutated after [`Self::new`].
-    // We don't need to include this in `state` and check for
+    restricted: bool,
-    // `self.is_restricted()` because `cuprate-rpc-interface` handles that.
-    pub restricted: bool,
 
-    /// State needed for request -> response mapping.
-    pub state: CupratedRpcHandlerState,
-}
-
-/// TODO
-#[derive(Clone)]
-pub struct CupratedRpcHandlerState {
     /// Read handle to the blockchain database.
-    pub blockchain: BlockchainReadHandle,
+    pub blockchain_read: BlockchainReadHandle,
+
+    /// Handle to the blockchain manager.
+    pub blockchain_manager: BlockchainManagerHandle,
 
     /// Read handle to the transaction pool database.
-    pub txpool: TxpoolReadHandle,
+    pub txpool_read: TxpoolReadHandle,
+
+    /// TODO: handle to txpool service.
+    pub txpool_manager: std::convert::Infallible,
 }
 
 impl CupratedRpcHandler {
-    /// TODO
+    /// Create a new [`Self`].
-    pub fn init() {
+    pub const fn new(
-        todo!()
+        restricted: bool,
+        blockchain_read: BlockchainReadHandle,
+        blockchain_manager: BlockchainManagerHandle,
+        txpool_read: TxpoolReadHandle,
+        txpool_manager: std::convert::Infallible,
+    ) -> Self {
+        Self {
+            restricted,
+            blockchain_read,
+            blockchain_manager,
+            txpool_read,
+            txpool_manager,
+        }
     }
 }
 
@@ -67,7 +147,7 @@ impl Service<JsonRpcRequest> for CupratedRpcHandler {
     }
 
     fn call(&mut self, request: JsonRpcRequest) -> Self::Future {
-        let state = CupratedRpcHandlerState::clone(&self.state);
+        let state = self.clone();
         Box::pin(json::map_request(state, request))
     }
 }
@@ -82,7 +162,7 @@ impl Service<BinRequest> for CupratedRpcHandler {
     }
 
     fn call(&mut self, request: BinRequest) -> Self::Future {
-        let state = CupratedRpcHandlerState::clone(&self.state);
+        let state = self.clone();
         Box::pin(bin::map_request(state, request))
     }
 }
@@ -97,7 +177,7 @@ impl Service<OtherRequest> for CupratedRpcHandler {
     }
 
     fn call(&mut self, request: OtherRequest) -> Self::Future {
-        let state = CupratedRpcHandlerState::clone(&self.state);
+        let state = self.clone();
         Box::pin(other::map_request(state, request))
     }
 }

binaries/cuprated/src/rpc/json.rs

@@ -23,11 +23,11 @@ use cuprate_rpc_types::json::{
     SyncInfoRequest, SyncInfoResponse,
 };
 
-use crate::rpc::CupratedRpcHandlerState;
+use crate::rpc::CupratedRpcHandler;
 
 /// Map a [`JsonRpcRequest`] to the function that will lead to a [`JsonRpcResponse`].
 pub(super) async fn map_request(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: JsonRpcRequest,
 ) -> Result<JsonRpcResponse, Error> {
     use JsonRpcRequest as Req;
@@ -84,210 +84,210 @@ pub(super) async fn map_request(
 }
 
 async fn get_block_count(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetBlockCountRequest,
 ) -> Result<GetBlockCountResponse, Error> {
     todo!()
 }
 
 async fn on_get_block_hash(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: OnGetBlockHashRequest,
 ) -> Result<OnGetBlockHashResponse, Error> {
     todo!()
 }
 
 async fn submit_block(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: SubmitBlockRequest,
 ) -> Result<SubmitBlockResponse, Error> {
     todo!()
 }
 
 async fn generate_blocks(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GenerateBlocksRequest,
 ) -> Result<GenerateBlocksResponse, Error> {
     todo!()
 }
 
 async fn get_last_block_header(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetLastBlockHeaderRequest,
 ) -> Result<GetLastBlockHeaderResponse, Error> {
     todo!()
 }
 
 async fn get_block_header_by_hash(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetBlockHeaderByHashRequest,
 ) -> Result<GetBlockHeaderByHashResponse, Error> {
     todo!()
 }
 
 async fn get_block_header_by_height(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetBlockHeaderByHeightRequest,
 ) -> Result<GetBlockHeaderByHeightResponse, Error> {
     todo!()
 }
 
 async fn get_block_headers_range(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetBlockHeadersRangeRequest,
 ) -> Result<GetBlockHeadersRangeResponse, Error> {
     todo!()
 }
 
 async fn get_block(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetBlockRequest,
 ) -> Result<GetBlockResponse, Error> {
     todo!()
 }
 
 async fn get_connections(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetConnectionsRequest,
 ) -> Result<GetConnectionsResponse, Error> {
     todo!()
 }
 
 async fn get_info(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetInfoRequest,
 ) -> Result<GetInfoResponse, Error> {
     todo!()
 }
 
 async fn hard_fork_info(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: HardForkInfoRequest,
 ) -> Result<HardForkInfoResponse, Error> {
     todo!()
 }
 
 async fn set_bans(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: SetBansRequest,
 ) -> Result<SetBansResponse, Error> {
     todo!()
 }
 
 async fn get_bans(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetBansRequest,
 ) -> Result<GetBansResponse, Error> {
     todo!()
 }
 
 async fn banned(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: BannedRequest,
 ) -> Result<BannedResponse, Error> {
     todo!()
 }
 
 async fn flush_transaction_pool(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: FlushTransactionPoolRequest,
 ) -> Result<FlushTransactionPoolResponse, Error> {
     todo!()
 }
 
 async fn get_output_histogram(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetOutputHistogramRequest,
 ) -> Result<GetOutputHistogramResponse, Error> {
     todo!()
 }
 
 async fn get_coinbase_tx_sum(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetCoinbaseTxSumRequest,
 ) -> Result<GetCoinbaseTxSumResponse, Error> {
     todo!()
 }
 
 async fn get_version(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetVersionRequest,
 ) -> Result<GetVersionResponse, Error> {
     todo!()
 }
 
 async fn get_fee_estimate(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetFeeEstimateRequest,
 ) -> Result<GetFeeEstimateResponse, Error> {
     todo!()
 }
 
 async fn get_alternate_chains(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetAlternateChainsRequest,
 ) -> Result<GetAlternateChainsResponse, Error> {
     todo!()
 }
 
 async fn relay_tx(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: RelayTxRequest,
 ) -> Result<RelayTxResponse, Error> {
     todo!()
 }
 
 async fn sync_info(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: SyncInfoRequest,
 ) -> Result<SyncInfoResponse, Error> {
     todo!()
 }
 
 async fn get_transaction_pool_backlog(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetTransactionPoolBacklogRequest,
 ) -> Result<GetTransactionPoolBacklogResponse, Error> {
     todo!()
 }
 
 async fn get_miner_data(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetMinerDataRequest,
 ) -> Result<GetMinerDataResponse, Error> {
     todo!()
 }
 
 async fn prune_blockchain(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: PruneBlockchainRequest,
 ) -> Result<PruneBlockchainResponse, Error> {
     todo!()
 }
 
 async fn calc_pow(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: CalcPowRequest,
 ) -> Result<CalcPowResponse, Error> {
     todo!()
 }
 
 async fn flush_cache(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: FlushCacheRequest,
 ) -> Result<FlushCacheResponse, Error> {
     todo!()
 }
 
 async fn add_aux_pow(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: AddAuxPowRequest,
 ) -> Result<AddAuxPowResponse, Error> {
     todo!()
 }
 
 async fn get_tx_ids_loose(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetTxIdsLooseRequest,
 ) -> Result<GetTxIdsLooseResponse, Error> {
     todo!()

binaries/cuprated/src/rpc/other.rs

@@ -17,11 +17,11 @@ use cuprate_rpc_types::other::{
     StopDaemonResponse, StopMiningRequest, StopMiningResponse, UpdateRequest, UpdateResponse,
 };
 
-use crate::rpc::CupratedRpcHandlerState;
+use crate::rpc::CupratedRpcHandler;
 
 /// Map a [`OtherRequest`] to the function that will lead to a [`OtherResponse`].
 pub(super) async fn map_request(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: OtherRequest,
 ) -> Result<OtherResponse, Error> {
     use OtherRequest as Req;
@@ -71,189 +71,189 @@ pub(super) async fn map_request(
 }
 
 async fn get_height(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetHeightRequest,
 ) -> Result<GetHeightResponse, Error> {
     todo!()
 }
 
 async fn get_transactions(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetTransactionsRequest,
 ) -> Result<GetTransactionsResponse, Error> {
     todo!()
 }
 
 async fn get_alt_blocks_hashes(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetAltBlocksHashesRequest,
 ) -> Result<GetAltBlocksHashesResponse, Error> {
     todo!()
 }
 
 async fn is_key_image_spent(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: IsKeyImageSpentRequest,
 ) -> Result<IsKeyImageSpentResponse, Error> {
     todo!()
 }
 
 async fn send_raw_transaction(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: SendRawTransactionRequest,
 ) -> Result<SendRawTransactionResponse, Error> {
     todo!()
 }
 
 async fn start_mining(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: StartMiningRequest,
 ) -> Result<StartMiningResponse, Error> {
     todo!()
 }
 
 async fn stop_mining(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: StopMiningRequest,
 ) -> Result<StopMiningResponse, Error> {
     todo!()
 }
 
 async fn mining_status(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: MiningStatusRequest,
 ) -> Result<MiningStatusResponse, Error> {
     todo!()
 }
 
 async fn save_bc(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: SaveBcRequest,
 ) -> Result<SaveBcResponse, Error> {
     todo!()
 }
 
 async fn get_peer_list(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetPeerListRequest,
 ) -> Result<GetPeerListResponse, Error> {
     todo!()
 }
 
 async fn set_log_hash_rate(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: SetLogHashRateRequest,
 ) -> Result<SetLogHashRateResponse, Error> {
     todo!()
 }
 
 async fn set_log_level(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: SetLogLevelRequest,
 ) -> Result<SetLogLevelResponse, Error> {
     todo!()
 }
 
 async fn set_log_categories(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: SetLogCategoriesRequest,
 ) -> Result<SetLogCategoriesResponse, Error> {
     todo!()
 }
 
 async fn set_bootstrap_daemon(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: SetBootstrapDaemonRequest,
 ) -> Result<SetBootstrapDaemonResponse, Error> {
     todo!()
 }
 
 async fn get_transaction_pool(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetTransactionPoolRequest,
 ) -> Result<GetTransactionPoolResponse, Error> {
     todo!()
 }
 
 async fn get_transaction_pool_stats(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetTransactionPoolStatsRequest,
 ) -> Result<GetTransactionPoolStatsResponse, Error> {
     todo!()
 }
 
 async fn stop_daemon(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: StopDaemonRequest,
 ) -> Result<StopDaemonResponse, Error> {
     todo!()
 }
 
 async fn get_limit(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetLimitRequest,
 ) -> Result<GetLimitResponse, Error> {
     todo!()
 }
 
 async fn set_limit(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: SetLimitRequest,
 ) -> Result<SetLimitResponse, Error> {
     todo!()
 }
 
 async fn out_peers(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: OutPeersRequest,
 ) -> Result<OutPeersResponse, Error> {
     todo!()
 }
 
 async fn in_peers(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: InPeersRequest,
 ) -> Result<InPeersResponse, Error> {
     todo!()
 }
 
 async fn get_net_stats(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetNetStatsRequest,
 ) -> Result<GetNetStatsResponse, Error> {
     todo!()
 }
 
 async fn get_outs(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetOutsRequest,
 ) -> Result<GetOutsResponse, Error> {
     todo!()
 }
 
 async fn update(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: UpdateRequest,
 ) -> Result<UpdateResponse, Error> {
     todo!()
 }
 
 async fn pop_blocks(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: PopBlocksRequest,
 ) -> Result<PopBlocksResponse, Error> {
     todo!()
 }
 
 async fn get_transaction_pool_hashes(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetTransactionPoolHashesRequest,
 ) -> Result<GetTransactionPoolHashesResponse, Error> {
     todo!()
 }
 
 async fn get_public_nodes(
-    state: CupratedRpcHandlerState,
+    state: CupratedRpcHandler,
     request: GetPublicNodesRequest,
 ) -> Result<GetPublicNodesResponse, Error> {
     todo!()

binaries/cuprated/src/rpc/request.rs

@@ -0,0 +1,19 @@
+//! Convenience functions for requests/responses.
+//!
+//! This module implements many methods for
+//! [`CupratedRpcHandler`](crate::rpc::CupratedRpcHandler)
+//! that are simple wrappers around the request/response API provided
+//! by the multiple [`tower::Service`]s.
+//!
+//! These exist to prevent noise like `unreachable!()`
+//! from being everywhere in the actual handler functions.
+//!
+//! Each module implements methods for a specific API, e.g.
+//! the [`blockchain`] modules contains methods for the
+//! blockchain database [`tower::Service`] API.
+
+mod address_book;
+mod blockchain;
+mod blockchain_context;
+mod blockchain_manager;
+mod txpool;

binaries/cuprated/src/rpc/request/address_book.rs

@@ -0,0 +1,104 @@
+//! Functions for TODO: doc enum message.
+
+use std::convert::Infallible;
+
+use anyhow::Error;
+use tower::ServiceExt;
+
+use cuprate_helper::cast::usize_to_u64;
+use cuprate_p2p_core::{
+    services::{AddressBookRequest, AddressBookResponse},
+    AddressBook, NetworkZone,
+};
+
+/// [`AddressBookRequest::PeerlistSize`]
+pub(super) async fn peerlist_size<Z: NetworkZone>(
+    address_book: &mut impl AddressBook<Z>,
+) -> Result<(u64, u64), Error> {
+    let AddressBookResponse::PeerlistSize { white, grey } = address_book
+        .ready()
+        .await
+        .expect("TODO")
+        .call(AddressBookRequest::PeerlistSize)
+        .await
+        .expect("TODO")
+    else {
+        unreachable!();
+    };
+
+    Ok((usize_to_u64(white), usize_to_u64(grey)))
+}
+
+/// [`AddressBookRequest::ConnectionCount`]
+pub(super) async fn connection_count<Z: NetworkZone>(
+    address_book: &mut impl AddressBook<Z>,
+) -> Result<(u64, u64), Error> {
+    let AddressBookResponse::ConnectionCount { incoming, outgoing } = address_book
+        .ready()
+        .await
+        .expect("TODO")
+        .call(AddressBookRequest::ConnectionCount)
+        .await
+        .expect("TODO")
+    else {
+        unreachable!();
+    };
+
+    Ok((usize_to_u64(incoming), usize_to_u64(outgoing)))
+}
+
+/// [`AddressBookRequest::SetBan`]
+pub(super) async fn set_ban<Z: NetworkZone>(
+    address_book: &mut impl AddressBook<Z>,
+    peer: cuprate_p2p_core::ban::SetBan<Z::Addr>,
+) -> Result<(), Error> {
+    let AddressBookResponse::Ok = address_book
+        .ready()
+        .await
+        .expect("TODO")
+        .call(AddressBookRequest::SetBan(peer))
+        .await
+        .expect("TODO")
+    else {
+        unreachable!();
+    };
+
+    Ok(())
+}
+
+/// [`AddressBookRequest::GetBan`]
+pub(super) async fn get_ban<Z: NetworkZone>(
+    address_book: &mut impl AddressBook<Z>,
+    peer: Z::Addr,
+) -> Result<Option<std::time::Instant>, Error> {
+    let AddressBookResponse::GetBan { unban_instant } = address_book
+        .ready()
+        .await
+        .expect("TODO")
+        .call(AddressBookRequest::GetBan(peer))
+        .await
+        .expect("TODO")
+    else {
+        unreachable!();
+    };
+
+    Ok(unban_instant)
+}
+
+/// [`AddressBookRequest::GetBans`]
+pub(super) async fn get_bans<Z: NetworkZone>(
+    address_book: &mut impl AddressBook<Z>,
+) -> Result<(), Error> {
+    let AddressBookResponse::GetBans(bans) = address_book
+        .ready()
+        .await
+        .expect("TODO")
+        .call(AddressBookRequest::GetBans)
+        .await
+        .expect("TODO")
+    else {
+        unreachable!();
+    };
+
+    Ok(todo!())
+}

binaries/cuprated/src/rpc/request/blockchain.rs

@@ -0,0 +1,308 @@
+//! Functions for [`BlockchainReadRequest`].
+
+use std::{
+    collections::{HashMap, HashSet},
+    ops::Range,
+};
+
+use anyhow::Error;
+use cuprate_blockchain::service::BlockchainReadHandle;
+use tower::{Service, ServiceExt};
+
+use cuprate_helper::cast::{u64_to_usize, usize_to_u64};
+use cuprate_types::{
+    blockchain::{BlockchainReadRequest, BlockchainResponse},
+    Chain, CoinbaseTxSum, ExtendedBlockHeader, MinerData, OutputHistogramEntry,
+    OutputHistogramInput, OutputOnChain,
+};
+
+/// [`BlockchainReadRequest::BlockExtendedHeader`].
+pub(super) async fn block_extended_header(
+    mut blockchain_read: BlockchainReadHandle,
+    height: u64,
+) -> Result<ExtendedBlockHeader, Error> {
+    let BlockchainResponse::BlockExtendedHeader(header) = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::BlockExtendedHeader(u64_to_usize(
+            height,
+        )))
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(header)
+}
+
+/// [`BlockchainReadRequest::BlockHash`].
+pub(super) async fn block_hash(
+    mut blockchain_read: BlockchainReadHandle,
+    height: u64,
+    chain: Chain,
+) -> Result<[u8; 32], Error> {
+    let BlockchainResponse::BlockHash(hash) = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::BlockHash(
+            u64_to_usize(height),
+            chain,
+        ))
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(hash)
+}
+
+/// [`BlockchainReadRequest::FindBlock`].
+pub(super) async fn find_block(
+    mut blockchain_read: BlockchainReadHandle,
+    block_hash: [u8; 32],
+) -> Result<Option<(Chain, usize)>, Error> {
+    let BlockchainResponse::FindBlock(option) = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::FindBlock(block_hash))
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(option)
+}
+
+/// [`BlockchainReadRequest::FilterUnknownHashes`].
+pub(super) async fn filter_unknown_hashes(
+    mut blockchain_read: BlockchainReadHandle,
+    block_hashes: HashSet<[u8; 32]>,
+) -> Result<HashSet<[u8; 32]>, Error> {
+    let BlockchainResponse::FilterUnknownHashes(output) = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::FilterUnknownHashes(block_hashes))
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(output)
+}
+
+/// [`BlockchainReadRequest::BlockExtendedHeaderInRange`]
+pub(super) async fn block_extended_header_in_range(
+    mut blockchain_read: BlockchainReadHandle,
+    range: Range<usize>,
+    chain: Chain,
+) -> Result<Vec<ExtendedBlockHeader>, Error> {
+    let BlockchainResponse::BlockExtendedHeaderInRange(output) = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::BlockExtendedHeaderInRange(
+            range, chain,
+        ))
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(output)
+}
+
+/// [`BlockchainReadRequest::ChainHeight`].
+pub(super) async fn chain_height(
+    mut blockchain_read: BlockchainReadHandle,
+) -> Result<(u64, [u8; 32]), Error> {
+    let BlockchainResponse::ChainHeight(height, hash) = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::ChainHeight)
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok((usize_to_u64(height), hash))
+}
+
+/// [`BlockchainReadRequest::GeneratedCoins`].
+pub(super) async fn generated_coins(
+    mut blockchain_read: BlockchainReadHandle,
+    block_height: u64,
+) -> Result<u64, Error> {
+    let BlockchainResponse::GeneratedCoins(generated_coins) = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::GeneratedCoins(u64_to_usize(
+            block_height,
+        )))
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(generated_coins)
+}
+
+/// [`BlockchainReadRequest::Outputs`]
+pub(super) async fn outputs(
+    mut blockchain_read: BlockchainReadHandle,
+    outputs: HashMap<u64, HashSet<u64>>,
+) -> Result<HashMap<u64, HashMap<u64, OutputOnChain>>, Error> {
+    let BlockchainResponse::Outputs(outputs) = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::Outputs(outputs))
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(outputs)
+}
+
+/// [`BlockchainReadRequest::NumberOutputsWithAmount`]
+pub(super) async fn number_outputs_with_amount(
+    mut blockchain_read: BlockchainReadHandle,
+    output_amounts: Vec<u64>,
+) -> Result<HashMap<u64, usize>, Error> {
+    let BlockchainResponse::NumberOutputsWithAmount(map) = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::NumberOutputsWithAmount(
+            output_amounts,
+        ))
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(map)
+}
+
+/// [`BlockchainReadRequest::KeyImagesSpent`]
+pub(super) async fn key_images_spent(
+    mut blockchain_read: BlockchainReadHandle,
+    key_images: HashSet<[u8; 32]>,
+) -> Result<bool, Error> {
+    let BlockchainResponse::KeyImagesSpent(is_spent) = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::KeyImagesSpent(key_images))
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(is_spent)
+}
+
+/// [`BlockchainReadRequest::CompactChainHistory`]
+pub(super) async fn compact_chain_history(
+    mut blockchain_read: BlockchainReadHandle,
+) -> Result<(Vec<[u8; 32]>, u128), Error> {
+    let BlockchainResponse::CompactChainHistory {
+        block_ids,
+        cumulative_difficulty,
+    } = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::CompactChainHistory)
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok((block_ids, cumulative_difficulty))
+}
+
+/// [`BlockchainReadRequest::FindFirstUnknown`]
+pub(super) async fn find_first_unknown(
+    mut blockchain_read: BlockchainReadHandle,
+    hashes: Vec<[u8; 32]>,
+) -> Result<Option<(usize, u64)>, Error> {
+    let BlockchainResponse::FindFirstUnknown(resp) = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::FindFirstUnknown(hashes))
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(resp.map(|(index, height)| (index, usize_to_u64(height))))
+}
+
+/// [`BlockchainReadRequest::TotalTxCount`]
+pub(super) async fn total_tx_count(
+    mut blockchain_read: BlockchainReadHandle,
+) -> Result<u64, Error> {
+    let BlockchainResponse::TotalTxCount(tx_count) = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::TotalTxCount)
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(usize_to_u64(tx_count))
+}
+
+/// [`BlockchainReadRequest::DatabaseSize`]
+pub(super) async fn database_size(
+    mut blockchain_read: BlockchainReadHandle,
+) -> Result<(u64, u64), Error> {
+    let BlockchainResponse::DatabaseSize {
+        database_size,
+        free_space,
+    } = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::DatabaseSize)
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok((database_size, free_space))
+}
+
+/// [`BlockchainReadRequest::OutputHistogram`]
+pub(super) async fn output_histogram(
+    mut blockchain_read: BlockchainReadHandle,
+    input: OutputHistogramInput,
+) -> Result<Vec<OutputHistogramEntry>, Error> {
+    let BlockchainResponse::OutputHistogram(histogram) = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::OutputHistogram(input))
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(histogram)
+}
+
+/// [`BlockchainReadRequest::CoinbaseTxSum`]
+pub(super) async fn coinbase_tx_sum(
+    mut blockchain_read: BlockchainReadHandle,
+    height: u64,
+    count: u64,
+) -> Result<CoinbaseTxSum, Error> {
+    let BlockchainResponse::CoinbaseTxSum(sum) = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::CoinbaseTxSum {
+            height: u64_to_usize(height),
+            count,
+        })
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(sum)
+}

binaries/cuprated/src/rpc/request/blockchain_context.rs

@@ -0,0 +1,69 @@
+//! Functions for [`BlockChainContextRequest`] and [`BlockChainContextResponse`].
+
+use std::convert::Infallible;
+
+use anyhow::Error;
+use tower::{Service, ServiceExt};
+
+use cuprate_consensus::context::{
+    BlockChainContext, BlockChainContextRequest, BlockChainContextResponse,
+    BlockChainContextService,
+};
+use cuprate_types::{FeeEstimate, HardFork, HardForkInfo};
+
+/// [`BlockChainContextRequest::Context`].
+pub(super) async fn context(
+    service: &mut BlockChainContextService,
+    height: u64,
+) -> Result<BlockChainContext, Error> {
+    let BlockChainContextResponse::Context(context) = service
+        .ready()
+        .await
+        .expect("TODO")
+        .call(BlockChainContextRequest::Context)
+        .await
+        .expect("TODO")
+    else {
+        unreachable!();
+    };
+
+    Ok(context)
+}
+
+/// [`BlockChainContextRequest::HardForkInfo`].
+pub(super) async fn hard_fork_info(
+    service: &mut BlockChainContextService,
+    hard_fork: HardFork,
+) -> Result<HardForkInfo, Error> {
+    let BlockChainContextResponse::HardForkInfo(hf_info) = service
+        .ready()
+        .await
+        .expect("TODO")
+        .call(BlockChainContextRequest::HardForkInfo(hard_fork))
+        .await
+        .expect("TODO")
+    else {
+        unreachable!();
+    };
+
+    Ok(hf_info)
+}
+
+/// [`BlockChainContextRequest::FeeEstimate`].
+pub(super) async fn fee_estimate(
+    service: &mut BlockChainContextService,
+    grace_blocks: u64,
+) -> Result<FeeEstimate, Error> {
+    let BlockChainContextResponse::FeeEstimate(fee) = service
+        .ready()
+        .await
+        .expect("TODO")
+        .call(BlockChainContextRequest::FeeEstimate { grace_blocks })
+        .await
+        .expect("TODO")
+    else {
+        unreachable!();
+    };
+
+    Ok(fee)
+}

binaries/cuprated/src/rpc/request/blockchain_manager.rs

@@ -0,0 +1,141 @@
+//! Functions for [`BlockchainManagerRequest`] & [`BlockchainManagerResponse`].
+
+use anyhow::Error;
+use monero_serai::block::Block;
+use tower::{Service, ServiceExt};
+
+use cuprate_helper::cast::{u64_to_usize, usize_to_u64};
+
+use crate::rpc::handler::{
+    BlockchainManagerHandle, BlockchainManagerRequest, BlockchainManagerResponse,
+};
+
+/// [`BlockchainManagerRequest::PopBlocks`]
+pub(super) async fn pop_blocks(
+    blockchain_manager: &mut BlockchainManagerHandle,
+    amount: u64,
+) -> Result<u64, Error> {
+    let BlockchainManagerResponse::PopBlocks { new_height } = blockchain_manager
+        .ready()
+        .await?
+        .call(BlockchainManagerRequest::PopBlocks {
+            amount: u64_to_usize(amount),
+        })
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(usize_to_u64(new_height))
+}
+
+/// [`BlockchainManagerRequest::Prune`]
+pub(super) async fn prune(blockchain_manager: &mut BlockchainManagerHandle) -> Result<(), Error> {
+    let BlockchainManagerResponse::Ok = blockchain_manager
+        .ready()
+        .await?
+        .call(BlockchainManagerRequest::Prune)
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(())
+}
+
+/// [`BlockchainManagerRequest::Pruned`]
+pub(super) async fn pruned(
+    blockchain_manager: &mut BlockchainManagerHandle,
+) -> Result<bool, Error> {
+    let BlockchainManagerResponse::Pruned(pruned) = blockchain_manager
+        .ready()
+        .await?
+        .call(BlockchainManagerRequest::Pruned)
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(pruned)
+}
+
+/// [`BlockchainManagerRequest::RelayBlock`]
+pub(super) async fn relay_block(
+    blockchain_manager: &mut BlockchainManagerHandle,
+    block: Block,
+) -> Result<(), Error> {
+    let BlockchainManagerResponse::Ok = blockchain_manager
+        .ready()
+        .await?
+        .call(BlockchainManagerRequest::RelayBlock(block))
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(())
+}
+
+/// [`BlockchainManagerRequest::Syncing`]
+pub(super) async fn syncing(
+    blockchain_manager: &mut BlockchainManagerHandle,
+) -> Result<bool, Error> {
+    let BlockchainManagerResponse::Syncing(syncing) = blockchain_manager
+        .ready()
+        .await?
+        .call(BlockchainManagerRequest::Syncing)
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(syncing)
+}
+
+/// [`BlockchainManagerRequest::Synced`]
+pub(super) async fn synced(
+    blockchain_manager: &mut BlockchainManagerHandle,
+) -> Result<bool, Error> {
+    let BlockchainManagerResponse::Synced(syncing) = blockchain_manager
+        .ready()
+        .await?
+        .call(BlockchainManagerRequest::Synced)
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(syncing)
+}
+
+/// [`BlockchainManagerRequest::Target`]
+pub(super) async fn target(
+    blockchain_manager: &mut BlockchainManagerHandle,
+) -> Result<std::time::Duration, Error> {
+    let BlockchainManagerResponse::Target(target) = blockchain_manager
+        .ready()
+        .await?
+        .call(BlockchainManagerRequest::Target)
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(target)
+}
+
+/// [`BlockchainManagerRequest::TargetHeight`]
+pub(super) async fn target_height(
+    blockchain_manager: &mut BlockchainManagerHandle,
+) -> Result<u64, Error> {
+    let BlockchainManagerResponse::TargetHeight { height } = blockchain_manager
+        .ready()
+        .await?
+        .call(BlockchainManagerRequest::TargetHeight)
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok(usize_to_u64(height))
+}

binaries/cuprated/src/rpc/request/txpool.rs

@@ -0,0 +1,57 @@
+//! Functions for [`TxpoolReadRequest`].
+
+use std::convert::Infallible;
+
+use anyhow::Error;
+use tower::{Service, ServiceExt};
+
+use cuprate_helper::cast::usize_to_u64;
+use cuprate_txpool::{
+    service::{
+        interface::{TxpoolReadRequest, TxpoolReadResponse},
+        TxpoolReadHandle,
+    },
+    TxEntry,
+};
+
+/// [`TxpoolReadRequest::Backlog`]
+pub(super) async fn backlog(txpool_read: &mut TxpoolReadHandle) -> Result<Vec<TxEntry>, Error> {
+    let TxpoolReadResponse::Backlog(tx_entries) = txpool_read
+        .ready()
+        .await
+        .expect("TODO")
+        .call(TxpoolReadRequest::Backlog)
+        .await
+        .expect("TODO")
+    else {
+        unreachable!();
+    };
+
+    Ok(tx_entries)
+}
+
+/// [`TxpoolReadRequest::Size`]
+pub(super) async fn size(txpool_read: &mut TxpoolReadHandle) -> Result<u64, Error> {
+    let TxpoolReadResponse::Size(size) = txpool_read
+        .ready()
+        .await
+        .expect("TODO")
+        .call(TxpoolReadRequest::Size)
+        .await
+        .expect("TODO")
+    else {
+        unreachable!();
+    };
+
+    Ok(usize_to_u64(size))
+}
+
+/// TODO
+#[expect(clippy::needless_pass_by_ref_mut, reason = "TODO: remove after impl")]
+pub(super) async fn flush(
+    txpool_read: &mut TxpoolReadHandle,
+    tx_hashes: Vec<[u8; 32]>,
+) -> Result<(), Error> {
+    todo!();
+    Ok(())
+}

consensus/fast-sync/src/fast_sync.rs

@@ -230,7 +230,7 @@ where
     let BlockChainContextResponse::Context(checked_context) = context_svc
         .ready()
         .await?
-        .call(BlockChainContextRequest::GetContext)
+        .call(BlockChainContextRequest::Context)
         .await?
     else {
         panic!("Context service returned wrong response!");

consensus/src/block.rs

@@ -351,7 +351,7 @@ where
     let BlockChainContextResponse::Context(checked_context) = context_svc
         .ready()
         .await?
-        .call(BlockChainContextRequest::GetContext)
+        .call(BlockChainContextRequest::Context)
         .await?
     else {
         panic!("Context service returned wrong response!");
@@ -374,7 +374,7 @@ where
         let BlockChainContextResponse::RxVms(rx_vms) = context_svc
             .ready()
             .await?
-            .call(BlockChainContextRequest::GetCurrentRxVm)
+            .call(BlockChainContextRequest::CurrentRxVms)
             .await?
         else {
             panic!("Blockchain context service returned wrong response!");
@@ -433,7 +433,7 @@ where
         context
     } else {
         let BlockChainContextResponse::Context(checked_context) = context_svc
-            .oneshot(BlockChainContextRequest::GetContext)
+            .oneshot(BlockChainContextRequest::Context)
             .await?
         else {
             panic!("Context service returned wrong response!");

consensus/src/block/batch_prepare.rs

@@ -93,7 +93,7 @@ where
     let BlockChainContextResponse::Context(checked_context) = context_svc
         .ready()
         .await?
-        .call(BlockChainContextRequest::GetContext)
+        .call(BlockChainContextRequest::Context)
         .await?
     else {
         panic!("Context service returned wrong response!");
@@ -136,7 +136,7 @@ where
         let BlockChainContextResponse::RxVms(rx_vms) = context_svc
             .ready()
             .await?
-            .call(BlockChainContextRequest::GetCurrentRxVm)
+            .call(BlockChainContextRequest::CurrentRxVms)
             .await?
         else {
             panic!("Blockchain context service returned wrong response!");

consensus/src/context.rs

@@ -31,7 +31,7 @@ mod alt_chains;
 mod task;
 mod tokens;
 
-use cuprate_types::Chain;
+use cuprate_types::{Chain, ChainInfo, FeeEstimate, HardForkInfo};
 use difficulty::DifficultyCache;
 use rx_vms::RandomXVm;
 use weight::BlockWeightsCache;
@@ -221,15 +221,18 @@ pub struct NewBlockData {
 #[derive(Debug, Clone)]
 pub enum BlockChainContextRequest {
     /// Get the current blockchain context.
-    GetContext,
+    Context,
-    /// Gets the current `RandomX` VM.
+
-    GetCurrentRxVm,
+    /// Gets all the current  `RandomX` VMs.
+    CurrentRxVms,
+
     /// Get the next difficulties for these blocks.
     ///
     /// Inputs: a list of block timestamps and hfs
     ///
     /// The number of difficulties returned will be one more than the number of timestamps/ hfs.
     BatchGetDifficulties(Vec<(u64, HardFork)>),
+
     /// Add a VM that has been created outside of the blockchain context service to the blockchain context.
     /// This is useful when batch calculating POW as you may need to create a new VM if you batch a lot of blocks together,
     /// it would be wasteful to then not give this VM to the context service to then use when it needs to init a VM with the same
@@ -237,8 +240,10 @@ pub enum BlockChainContextRequest {
     ///
     /// This should include the seed used to init this VM and the VM.
     NewRXVM(([u8; 32], Arc<RandomXVm>)),
+
     /// A request to add a new block to the cache.
     Update(NewBlockData),
+
     /// Pop blocks from the cache to the specified height.
     PopBlocks {
         /// The number of blocks to pop from the top of the chain.
@@ -248,8 +253,22 @@ pub enum BlockChainContextRequest {
         /// This will panic if the number of blocks will pop the genesis block.
         numb_blocks: usize,
     },
+
+    /// Get information on a certain hardfork.
+    HardForkInfo(HardFork),
+
+    /// Get the current fee estimate.
+    FeeEstimate {
+        /// TODO
+        grace_blocks: u64,
+    },
+
     /// Clear the alt chain context caches.
     ClearAltCache,
+
+    /// Get information on all the current alternate chains.
+    AltChains,
+
     //----------------------------------------------------------------------------------------------------------- AltChainRequests
     /// A request for an alt chain context cache.
     ///
@@ -261,6 +280,7 @@ pub enum BlockChainContextRequest {
         /// An internal token to prevent external crates calling this request.
         _token: AltChainRequestToken,
     },
+
     /// A request for a difficulty cache of an alternative chin.
     ///
     /// This variant is private and is not callable from outside this crate, the block verifier service will
@@ -271,6 +291,7 @@ pub enum BlockChainContextRequest {
         /// An internal token to prevent external crates calling this request.
         _token: AltChainRequestToken,
     },
+
     /// A request for a block weight cache of an alternative chin.
     ///
     /// This variant is private and is not callable from outside this crate, the block verifier service will
@@ -281,6 +302,7 @@ pub enum BlockChainContextRequest {
         /// An internal token to prevent external crates calling this request.
         _token: AltChainRequestToken,
     },
+
     /// A request for a RX VM for an alternative chin.
     ///
     /// Response variant: [`BlockChainContextResponse::AltChainRxVM`].
@@ -295,6 +317,7 @@ pub enum BlockChainContextRequest {
         /// An internal token to prevent external crates calling this request.
         _token: AltChainRequestToken,
     },
+
     /// A request to add an alt chain context cache to the context cache.
     ///
     /// This variant is private and is not callable from outside this crate, the block verifier service will
@@ -310,22 +333,49 @@ pub enum BlockChainContextRequest {
 }
 
 pub enum BlockChainContextResponse {
-    /// Blockchain context response.
+    /// A generic Ok response.
+    ///
+    /// Response to:
+    /// - [`BlockChainContextRequest::NewRXVM`]
+    /// - [`BlockChainContextRequest::Update`]
+    /// - [`BlockChainContextRequest::PopBlocks`]
+    /// - [`BlockChainContextRequest::ClearAltCache`]
+    /// - [`BlockChainContextRequest::AddAltChainContextCache`]
+    Ok,
+
+    /// Response to [`BlockChainContextRequest::Context`]
     Context(BlockChainContext),
+
+    /// Response to [`BlockChainContextRequest::CurrentRxVms`]
+    ///
     /// A map of seed height to `RandomX` VMs.
     RxVms(HashMap<usize, Arc<RandomXVm>>),
+
     /// A list of difficulties.
     BatchDifficulties(Vec<u128>),
+
+    /// Response to [`BlockChainContextRequest::HardForkInfo`]
+    HardForkInfo(HardForkInfo),
+
+    /// Response to [`BlockChainContextRequest::FeeEstimate`]
+    FeeEstimate(FeeEstimate),
+
+    /// Response to [`BlockChainContextRequest::AltChains`]
+    ///
+    /// If the inner [`Vec::is_empty`], there were no alternate chains.
+    AltChains(Vec<ChainInfo>),
+
     /// An alt chain context cache.
     AltChainContextCache(Box<AltChainContextCache>),
+
     /// A difficulty cache for an alt chain.
     AltChainDifficultyCache(DifficultyCache),
+
     /// A randomX VM for an alt chain.
     AltChainRxVM(Arc<RandomXVm>),
+
     /// A weight cache for an alt chain
     AltChainWeightCache(BlockWeightsCache),
-    /// A generic Ok response.
-    Ok,
 }
 
 /// The blockchain context service.

consensus/src/context/task.rs

@@ -153,7 +153,7 @@ impl<D: Database + Clone + Send + 'static> ContextTask<D> {
         req: BlockChainContextRequest,
     ) -> Result<BlockChainContextResponse, tower::BoxError> {
         Ok(match req {
-            BlockChainContextRequest::GetContext => {
+            BlockChainContextRequest::Context => {
                 tracing::debug!("Getting blockchain context");
 
                 let current_hf = self.hardfork_state.current_hardfork();
@@ -183,7 +183,7 @@ impl<D: Database + Clone + Send + 'static> ContextTask<D> {
                     },
                 })
             }
-            BlockChainContextRequest::GetCurrentRxVm => {
+            BlockChainContextRequest::CurrentRxVms => {
                 BlockChainContextResponse::RxVms(self.rx_vm_cache.get_vms().await)
             }
             BlockChainContextRequest::BatchGetDifficulties(blocks) => {
@@ -325,6 +325,11 @@ impl<D: Database + Clone + Send + 'static> ContextTask<D> {
                 self.alt_chain_cache_map.add_alt_cache(prev_id, cache);
                 BlockChainContextResponse::Ok
             }
+            BlockChainContextRequest::HardForkInfo(_)
+            | BlockChainContextRequest::FeeEstimate { .. }
+            | BlockChainContextRequest::AltChains => {
+                todo!("finish https://github.com/Cuprate/cuprate/pull/297")
+            }
         })
     }
 

consensus/src/tests/context.rs

@@ -41,7 +41,7 @@ async fn context_invalidated_on_new_block() -> Result<(), tower::BoxError> {
 
     let BlockChainContextResponse::Context(context) = ctx_svc
         .clone()
-        .oneshot(BlockChainContextRequest::GetContext)
+        .oneshot(BlockChainContextRequest::Context)
         .await?
     else {
         panic!("Context service returned wrong response!");
@@ -81,9 +81,8 @@ async fn context_height_correct() -> Result<(), tower::BoxError> {
 
     let ctx_svc = initialize_blockchain_context(TEST_CONTEXT_CONFIG, db).await?;
 
-    let BlockChainContextResponse::Context(context) = ctx_svc
+    let BlockChainContextResponse::Context(context) =
-        .oneshot(BlockChainContextRequest::GetContext)
+        ctx_svc.oneshot(BlockChainContextRequest::Context).await?
-        .await?
     else {
         panic!("context service returned incorrect response!")
     };

p2p/address-book/src/book.rs

@@ -229,6 +229,15 @@ impl<Z: BorshNetworkZone> AddressBook<Z> {
         self.banned_peers.contains_key(&peer.ban_id())
     }
 
+    /// Checks when a peer will be unbanned.
+    ///
+    /// - If the peer is banned, this returns [`Some`] containing
+    ///   the [`Instant`] the peer will be unbanned
+    /// - If the peer is not banned, this returns [`None`]
+    fn peer_unban_instant(&self, peer: &Z::Addr) -> Option<Instant> {
+        self.banned_peers.get(&peer.ban_id()).copied()
+    }
+
     fn handle_incoming_peer_list(
         &mut self,
         mut peer_list: Vec<ZoneSpecificPeerListEntryBase<Z::Addr>>,
@@ -408,9 +417,15 @@ impl<Z: BorshNetworkZone> Service<AddressBookRequest<Z>> for AddressBook<Z> {
             AddressBookRequest::GetWhitePeers(len) => {
                 Ok(AddressBookResponse::Peers(self.get_white_peers(len)))
             }
-            AddressBookRequest::IsPeerBanned(addr) => Ok(AddressBookResponse::IsPeerBanned(
+            AddressBookRequest::GetBan(addr) => Ok(AddressBookResponse::GetBan {
-                self.is_peer_banned(&addr),
+                unban_instant: self.peer_unban_instant(&addr).map(Instant::into_std),
-            )),
+            }),
+            AddressBookRequest::PeerlistSize
+            | AddressBookRequest::ConnectionCount
+            | AddressBookRequest::SetBan(_)
+            | AddressBookRequest::GetBans => {
+                todo!("finish https://github.com/Cuprate/cuprate/pull/297")
+            }
         };
 
         ready(response)

p2p/p2p-core/src/ban.rs

@@ -0,0 +1,23 @@
+//! Data structures related to bans.
+
+use std::time::{Duration, Instant};
+
+use crate::NetZoneAddress;
+
+/// Data within [`crate::services::AddressBookRequest::SetBan`].
+pub struct SetBan<A: NetZoneAddress> {
+    /// Address of the peer.
+    pub address: A,
+    /// - If [`Some`], how long this peer should be banned for
+    /// - If [`None`], the peer will be unbanned
+    pub ban: Option<Duration>,
+}
+
+/// Data within [`crate::services::AddressBookResponse::GetBans`].
+pub struct BanState<A: NetZoneAddress> {
+    /// Address of the peer.
+    pub address: A,
+    /// - If [`Some`], the peer is banned until this [`Instant`]
+    /// - If [`None`], the peer is not currently banned
+    pub unban_instant: Option<Instant>,
+}

p2p/p2p-core/src/client/handshaker/builder/dummy.rs

@@ -105,7 +105,15 @@ impl<N: NetworkZone> Service<AddressBookRequest<N>> for DummyAddressBook {
             AddressBookRequest::NewConnection { .. } | AddressBookRequest::IncomingPeerList(_) => {
                 AddressBookResponse::Ok
             }
-            AddressBookRequest::IsPeerBanned(_) => AddressBookResponse::IsPeerBanned(false),
+            AddressBookRequest::GetBan(_) => AddressBookResponse::GetBan {
+                unban_instant: None,
+            },
+            AddressBookRequest::PeerlistSize
+            | AddressBookRequest::ConnectionCount
+            | AddressBookRequest::SetBan(_)
+            | AddressBookRequest::GetBans => {
+                todo!("finish https://github.com/Cuprate/cuprate/pull/297")
+            }
         }))
     }
 }

p2p/p2p-core/src/lib.rs

@@ -75,6 +75,7 @@ use cuprate_wire::{
     NetworkAddress,
 };
 
+pub mod ban;
 pub mod client;
 mod constants;
 pub mod error;

p2p/p2p-core/src/services.rs

@@ -1,9 +1,13 @@
+use std::time::Instant;
+
 use cuprate_pruning::{PruningError, PruningSeed};
 use cuprate_wire::{CoreSyncData, PeerListEntryBase};
 
 use crate::{
-    client::InternalPeerID, handles::ConnectionHandle, NetZoneAddress, NetworkAddressIncorrectZone,
+    ban::{BanState, SetBan},
-    NetworkZone,
+    client::InternalPeerID,
+    handles::ConnectionHandle,
+    NetZoneAddress, NetworkAddressIncorrectZone, NetworkZone,
 };
 
 /// A request to the core sync service for our node's [`CoreSyncData`].
@@ -86,16 +90,20 @@ pub enum AddressBookRequest<Z: NetworkZone> {
         /// The peers rpc credits per hash
         rpc_credits_per_hash: u32,
     },
+
     /// Tells the address book about a peer list received from a peer.
     IncomingPeerList(Vec<ZoneSpecificPeerListEntryBase<Z::Addr>>),
+
     /// Takes a random white peer from the peer list. If height is specified
     /// then the peer list should retrieve a peer that should have a full
     /// block at that height according to it's pruning seed
     TakeRandomWhitePeer { height: Option<usize> },
+
     /// Takes a random gray peer from the peer list. If height is specified
     /// then the peer list should retrieve a peer that should have a full
     /// block at that height according to it's pruning seed
     TakeRandomGrayPeer { height: Option<usize> },
+
     /// Takes a random peer from the peer list. If height is specified
     /// then the peer list should retrieve a peer that should have a full
     /// block at that height according to it's pruning seed.
@@ -103,17 +111,56 @@ pub enum AddressBookRequest<Z: NetworkZone> {
     /// The address book will look in the white peer list first, then the gray
     /// one if no peer is found.
     TakeRandomPeer { height: Option<usize> },
+
     /// Gets the specified number of white peers, or less if we don't have enough.
     GetWhitePeers(usize),
+
+    /// Get the amount of white & grey peers.
+    PeerlistSize,
+
+    /// Get the amount of incoming & outgoing connections.
+    ConnectionCount,
+
+    /// (Un)ban a peer.
+    SetBan(SetBan<Z::Addr>),
+
     /// Checks if the given peer is banned.
-    IsPeerBanned(Z::Addr),
+    GetBan(Z::Addr),
+
+    /// Get the state of all bans.
+    GetBans,
 }
 
 /// A response from the address book service.
 pub enum AddressBookResponse<Z: NetworkZone> {
+    /// Generic OK response.
+    ///
+    /// Response to:
+    /// - [`AddressBookRequest::NewConnection`]
+    /// - [`AddressBookRequest::IncomingPeerList`]
     Ok,
+
+    /// Response to:
+    /// - [`AddressBookRequest::TakeRandomWhitePeer`]
+    /// - [`AddressBookRequest::TakeRandomGrayPeer`]
+    /// - [`AddressBookRequest::TakeRandomPeer`]
     Peer(ZoneSpecificPeerListEntryBase<Z::Addr>),
+
+    /// Response to [`AddressBookRequest::GetWhitePeers`].
     Peers(Vec<ZoneSpecificPeerListEntryBase<Z::Addr>>),
-    /// Contains `true` if the peer is banned.
+
-    IsPeerBanned(bool),
+    /// Response to [`AddressBookRequest::PeerlistSize`].
+    PeerlistSize { white: usize, grey: usize },
+
+    /// Response to [`AddressBookRequest::ConnectionCount`].
+    ConnectionCount { incoming: usize, outgoing: usize },
+
+    /// Response to [`AddressBookRequest::GetBan`].
+    ///
+    /// This returns [`None`] if the peer is not banned,
+    /// else it returns how long the peer is banned for.
+    GetBan { unban_instant: Option<Instant> },
+
+    /// Response to [`AddressBookRequest::GetBans`].
+    GetBans(Vec<BanState<Z::Addr>>),
 }

p2p/p2p/src/inbound_server.rs

@@ -79,16 +79,16 @@ where
 
         // If peer is banned, drop connection
         if let Some(addr) = &addr {
-            let AddressBookResponse::IsPeerBanned(banned) = address_book
+            let AddressBookResponse::GetBan { unban_instant } = address_book
                 .ready()
                 .await?
-                .call(AddressBookRequest::IsPeerBanned(*addr))
+                .call(AddressBookRequest::GetBan(*addr))
                 .await?
             else {
                 panic!("Address book returned incorrect response!");
             };
 
-            if banned {
+            if unban_instant.is_some() {
                 continue;
             }
         }

storage/blockchain/src/service/mod.rs

@@ -21,8 +21,8 @@
 //!
 //! The 2nd allows any caller to send [`WriteRequest`][req_w]s.
 //!
-//! The `DatabaseReadHandle` can be shared as it is cheaply [`Clone`]able, however,
+//! The [`BlockchainReadHandle`] can be shared as it is cheaply [`Clone`]able, however,
-//! the `DatabaseWriteHandle` cannot be cloned. There is only 1 place in Cuprate that
+//! the [`BlockchainWriteHandle`] cannot be cloned. There is only 1 place in Cuprate that
 //! writes, so it is passed there and used.
 //!
 //! ## Initialization

storage/blockchain/src/service/read.rs

@@ -1,5 +1,13 @@
 //! Database reader thread-pool definitions and logic.
 
+#![expect(
+    unreachable_code,
+    unused_variables,
+    clippy::unnecessary_wraps,
+    clippy::needless_pass_by_value,
+    reason = "TODO: finish implementing the signatures from <https://github.com/Cuprate/cuprate/pull/297>"
+)]
+
 //---------------------------------------------------------------------------------------------------- Import
 use std::{
     collections::{HashMap, HashSet},
@@ -18,7 +26,7 @@ use cuprate_database_service::{init_thread_pool, DatabaseReadService, ReaderThre
 use cuprate_helper::map::combine_low_high_bits_to_u128;
 use cuprate_types::{
     blockchain::{BlockchainReadRequest, BlockchainResponse},
-    Chain, ChainId, ExtendedBlockHeader, OutputOnChain,
+    Chain, ChainId, ExtendedBlockHeader, OutputHistogramInput, OutputOnChain,
 };
 
 use crate::{
@@ -107,6 +115,12 @@ fn map_request(
         R::CompactChainHistory => compact_chain_history(env),
         R::FindFirstUnknown(block_ids) => find_first_unknown(env, &block_ids),
         R::AltBlocksInChain(chain_id) => alt_blocks_in_chain(env, chain_id),
+        R::Block { height } => block(env, height),
+        R::BlockByHash(hash) => block_by_hash(env, hash),
+        R::TotalTxCount => total_tx_count(env),
+        R::DatabaseSize => database_size(env),
+        R::OutputHistogram(input) => output_histogram(env, input),
+        R::CoinbaseTxSum { height, count } => coinbase_tx_sum(env, height, count),
     }
 
     /* SOMEDAY: post-request handling, run some code for each request? */
@@ -601,3 +615,36 @@ fn alt_blocks_in_chain(env: &ConcreteEnv, chain_id: ChainId) -> ResponseResult {
 
     Ok(BlockchainResponse::AltBlocksInChain(blocks))
 }
+
+/// [`BlockchainReadRequest::Block`]
+fn block(env: &ConcreteEnv, block_height: BlockHeight) -> ResponseResult {
+    Ok(BlockchainResponse::Block(todo!()))
+}
+
+/// [`BlockchainReadRequest::BlockByHash`]
+fn block_by_hash(env: &ConcreteEnv, block_hash: BlockHash) -> ResponseResult {
+    Ok(BlockchainResponse::Block(todo!()))
+}
+
+/// [`BlockchainReadRequest::TotalTxCount`]
+fn total_tx_count(env: &ConcreteEnv) -> ResponseResult {
+    Ok(BlockchainResponse::TotalTxCount(todo!()))
+}
+
+/// [`BlockchainReadRequest::DatabaseSize`]
+fn database_size(env: &ConcreteEnv) -> ResponseResult {
+    Ok(BlockchainResponse::DatabaseSize {
+        database_size: todo!(),
+        free_space: todo!(),
+    })
+}
+
+/// [`BlockchainReadRequest::OutputHistogram`]
+fn output_histogram(env: &ConcreteEnv, input: OutputHistogramInput) -> ResponseResult {
+    Ok(BlockchainResponse::OutputHistogram(todo!()))
+}
+
+/// [`BlockchainReadRequest::CoinbaseTxSum`]
+fn coinbase_tx_sum(env: &ConcreteEnv, height: usize, count: u64) -> ResponseResult {
+    Ok(BlockchainResponse::CoinbaseTxSum(todo!()))
+}

storage/txpool/src/lib.rs

@@ -10,10 +10,12 @@ pub mod ops;
 #[cfg(feature = "service")]
 pub mod service;
 pub mod tables;
+mod tx;
 pub mod types;
 
 pub use config::Config;
 pub use free::open;
+pub use tx::TxEntry;
 
 //re-exports
 pub use cuprate_database;

storage/txpool/src/service.rs

@@ -21,9 +21,7 @@
 //!
 //! The 2nd allows any caller to send [`WriteRequest`][req_w]s.
 //!
-//! The `DatabaseReadHandle` can be shared as it is cheaply [`Clone`]able, however,
+//! Both the handles are cheaply [`Clone`]able.
-//! the `DatabaseWriteHandle` cannot be cloned. There is only 1 place in Cuprate that
-//! writes, so it is passed there and used.
 //!
 //! ## Initialization
 //! The database & thread-pool system can be initialized with [`init()`].

storage/txpool/src/service/interface.rs

@@ -5,30 +5,53 @@ use std::sync::Arc;
 
 use cuprate_types::TransactionVerificationData;
 
-use crate::types::TransactionHash;
+use crate::{tx::TxEntry, types::TransactionHash};
 
 //---------------------------------------------------------------------------------------------------- TxpoolReadRequest
 /// The transaction pool [`tower::Service`] read request type.
 pub enum TxpoolReadRequest {
     /// A request for the blob (raw bytes) of a transaction with the given hash.
     TxBlob(TransactionHash),
+
     /// A request for the [`TransactionVerificationData`] of a transaction in the tx pool.
     TxVerificationData(TransactionHash),
+
+    /// Get information on all transactions in the pool.
+    Backlog,
+
+    /// Get the number of transactions in the pool.
+    Size,
 }
 
 //---------------------------------------------------------------------------------------------------- TxpoolReadResponse
 /// The transaction pool [`tower::Service`] read response type.
 #[expect(clippy::large_enum_variant)]
 pub enum TxpoolReadResponse {
-    /// A response containing the raw bytes of a transaction.
+    /// Response to [`TxpoolReadRequest::TxBlob`].
+    ///
+    /// The inner value is the raw bytes of a transaction.
     // TODO: use bytes::Bytes.
     TxBlob(Vec<u8>),
-    /// A response of [`TransactionVerificationData`].
+
+    /// Response to [`TxpoolReadRequest::TxVerificationData`].
     TxVerificationData(TransactionVerificationData),
+
+    /// Response to [`TxpoolReadRequest::Backlog`].
+    ///
+    /// The inner `Vec` contains information on all
+    /// the transactions currently in the pool.
+    Backlog(Vec<TxEntry>),
+
+    /// Response to [`TxpoolReadRequest::Size`].
+    ///
+    /// The inner value is the amount of
+    /// transactions currently in the pool.
+    Size(usize),
 }
 
 //---------------------------------------------------------------------------------------------------- TxpoolWriteRequest
 /// The transaction pool [`tower::Service`] write request type.
+#[derive(Clone)]
 pub enum TxpoolWriteRequest {
     /// Add a transaction to the pool.
     ///
@@ -41,6 +64,7 @@ pub enum TxpoolWriteRequest {
         /// [`true`] if this tx is in the stem state.
         state_stem: bool,
     },
+
     /// Remove a transaction with the given hash from the pool.
     ///
     /// Returns [`TxpoolWriteResponse::Ok`].
@@ -49,11 +73,14 @@ pub enum TxpoolWriteRequest {
 
 //---------------------------------------------------------------------------------------------------- TxpoolWriteResponse
 /// The transaction pool [`tower::Service`] write response type.
-#[derive(Debug, Ord, PartialOrd, Eq, PartialEq)]
+#[derive(Clone, Debug, Ord, PartialOrd, Eq, PartialEq)]
 pub enum TxpoolWriteResponse {
-    /// A [`TxpoolWriteRequest::AddTransaction`] response.
+    /// Response to:
+    /// - [`TxpoolWriteRequest::RemoveTransaction`]
+    Ok,
+
+    /// Response to [`TxpoolWriteRequest::AddTransaction`].
     ///
     /// If the inner value is [`Some`] the tx was not added to the pool as it double spends a tx with the given hash.
     AddTransaction(Option<TransactionHash>),
-    Ok,
 }

storage/txpool/src/service/read.rs

@@ -1,3 +1,10 @@
+#![expect(
+    unreachable_code,
+    unused_variables,
+    clippy::unnecessary_wraps,
+    reason = "TODO: finish implementing the signatures from <https://github.com/Cuprate/cuprate/pull/297>"
+)]
+
 use std::sync::Arc;
 
 use rayon::ThreadPool;
@@ -58,6 +65,8 @@ fn map_request(
     match request {
         TxpoolReadRequest::TxBlob(tx_hash) => tx_blob(env, &tx_hash),
         TxpoolReadRequest::TxVerificationData(tx_hash) => tx_verification_data(env, &tx_hash),
+        TxpoolReadRequest::Backlog => backlog(env),
+        TxpoolReadRequest::Size => size(env),
     }
 }
 
@@ -101,3 +110,15 @@ fn tx_verification_data(env: &ConcreteEnv, tx_hash: &TransactionHash) -> ReadRes
 
     get_transaction_verification_data(tx_hash, &tables).map(TxpoolReadResponse::TxVerificationData)
 }
+
+/// [`TxpoolReadRequest::Backlog`].
+#[inline]
+fn backlog(env: &ConcreteEnv) -> ReadResponseResult {
+    Ok(TxpoolReadResponse::Backlog(todo!()))
+}
+
+/// [`TxpoolReadRequest::Size`].
+#[inline]
+fn size(env: &ConcreteEnv) -> ReadResponseResult {
+    Ok(TxpoolReadResponse::Size(todo!()))
+}

storage/txpool/src/tx.rs

@@ -0,0 +1,14 @@
+//! Transaction metadata.
+
+/// Data about a transaction in the pool.
+///
+/// Used in [`TxpoolReadResponse::Backlog`](crate::service::interface::TxpoolReadResponse::Backlog).
+#[derive(Copy, Clone, Debug, Ord, PartialOrd, Eq, PartialEq, Hash)]
+pub struct TxEntry {
+    /// The transaction's weight.
+    pub weight: u64,
+    /// The transaction's fee.
+    pub fee: u64,
+    /// How long the transaction has been in the pool.
+    pub time_in_pool: std::time::Duration,
+}

types/src/blockchain.rs

@@ -8,9 +8,11 @@ use std::{
     ops::Range,
 };
 
+use monero_serai::block::Block;
+
 use crate::{
     types::{Chain, ExtendedBlockHeader, OutputOnChain, VerifiedBlockInformation},
-    AltBlockInformation, ChainId,
+    AltBlockInformation, ChainId, CoinbaseTxSum, OutputHistogramEntry, OutputHistogramInput,
 };
 
 //---------------------------------------------------------------------------------------------------- ReadRequest
@@ -103,6 +105,29 @@ pub enum BlockchainReadRequest {
 
     /// A request for all alt blocks in the chain with the given [`ChainId`].
     AltBlocksInChain(ChainId),
+
+    /// Get a [`Block`] by its height.
+    Block { height: usize },
+
+    /// Get a [`Block`] by its hash.
+    BlockByHash([u8; 32]),
+
+    /// Get the total amount of non-coinbase transactions in the chain.
+    TotalTxCount,
+
+    /// Get the current size of the database.
+    DatabaseSize,
+
+    /// Get an output histogram.
+    ///
+    /// TODO: document fields after impl.
+    OutputHistogram(OutputHistogramInput),
+
+    /// Get the coinbase amount and the fees amount for
+    /// `N` last blocks starting at particular height.
+    ///
+    /// TODO: document fields after impl.
+    CoinbaseTxSum { height: usize, count: u64 },
 }
 
 //---------------------------------------------------------------------------------------------------- WriteRequest
@@ -147,6 +172,7 @@ pub enum BlockchainWriteRequest {
 /// This pairs with [`BlockchainReadRequest`] and [`BlockchainWriteRequest`],
 /// see those two for more info.
 #[derive(Debug, Clone, PartialEq, Eq)]
+#[expect(clippy::large_enum_variant)]
 pub enum BlockchainResponse {
     //------------------------------------------------------ Reads
     /// Response to [`BlockchainReadRequest::BlockExtendedHeader`].
@@ -215,18 +241,41 @@ pub enum BlockchainResponse {
         cumulative_difficulty: u128,
     },
 
-    /// The response for [`BlockchainReadRequest::FindFirstUnknown`].
+    /// Response to [`BlockchainReadRequest::FindFirstUnknown`].
     ///
     /// Contains the index of the first unknown block and its expected height.
     ///
     /// This will be [`None`] if all blocks were known.
     FindFirstUnknown(Option<(usize, usize)>),
 
-    /// The response for [`BlockchainReadRequest::AltBlocksInChain`].
+    /// Response to [`BlockchainReadRequest::AltBlocksInChain`].
     ///
     /// Contains all the alt blocks in the alt-chain in chronological order.
     AltBlocksInChain(Vec<AltBlockInformation>),
 
+    /// Response to:
+    /// - [`BlockchainReadRequest::Block`].
+    /// - [`BlockchainReadRequest::BlockByHash`].
+    Block(Block),
+
+    /// Response to [`BlockchainReadRequest::TotalTxCount`].
+    TotalTxCount(usize),
+
+    /// Response to [`BlockchainReadRequest::DatabaseSize`].
+    DatabaseSize {
+        /// The size of the database file in bytes.
+        database_size: u64,
+        /// The amount of free bytes there are
+        /// the disk where the database is located.
+        free_space: u64,
+    },
+
+    /// Response to [`BlockchainReadRequest::OutputHistogram`].
+    OutputHistogram(Vec<OutputHistogramEntry>),
+
+    /// Response to [`BlockchainReadRequest::CoinbaseTxSum`].
+    CoinbaseTxSum(CoinbaseTxSum),
+
     //------------------------------------------------------ Writes
     /// A generic Ok response to indicate a request was successfully handled.
     ///
@@ -236,7 +285,8 @@ pub enum BlockchainResponse {
     /// - [`BlockchainWriteRequest::ReverseReorg`]
     /// - [`BlockchainWriteRequest::FlushAltBlocks`]
     Ok,
-    /// The response for [`BlockchainWriteRequest::PopBlocks`].
+
+    /// Response to [`BlockchainWriteRequest::PopBlocks`].
     ///
     /// The inner value is the alt-chain ID for the old main chain blocks.
     PopBlocks(ChainId),

types/src/lib.rs

@@ -20,8 +20,9 @@ pub use transaction_verification_data::{
     CachedVerificationState, TransactionVerificationData, TxVersion,
 };
 pub use types::{
-    AltBlockInformation, Chain, ChainId, ExtendedBlockHeader, OutputOnChain,
+    AltBlockInformation, Chain, ChainId, ChainInfo, CoinbaseTxSum, ExtendedBlockHeader,
-    VerifiedBlockInformation, VerifiedTransactionInformation,
+    FeeEstimate, HardForkInfo, MinerData, MinerDataTxBacklogEntry, OutputHistogramEntry,
+    OutputHistogramInput, OutputOnChain, VerifiedBlockInformation, VerifiedTransactionInformation,
 };
 
 //---------------------------------------------------------------------------------------------------- Feature-gated

types/src/types.rs

@@ -1,6 +1,5 @@
 //! Various shared data types in Cuprate.
 
-//---------------------------------------------------------------------------------------------------- Import
 use std::num::NonZero;
 
 use curve25519_dalek::edwards::EdwardsPoint;
@@ -11,7 +10,6 @@ use monero_serai::{
 
 use crate::HardFork;
 
-//---------------------------------------------------------------------------------------------------- ExtendedBlockHeader
 /// Extended header data of a block.
 ///
 /// This contains various metadata of a block, but not the block blob itself.
@@ -37,7 +35,6 @@ pub struct ExtendedBlockHeader {
     pub long_term_weight: usize,
 }
 
-//---------------------------------------------------------------------------------------------------- VerifiedTransactionInformation
 /// Verified information of a transaction.
 ///
 /// This represents a valid transaction
@@ -61,7 +58,6 @@ pub struct VerifiedTransactionInformation {
     pub tx_hash: [u8; 32],
 }
 
-//---------------------------------------------------------------------------------------------------- VerifiedBlockInformation
 /// Verified information of a block.
 ///
 /// This represents a block that has already been verified to be correct.
@@ -94,14 +90,12 @@ pub struct VerifiedBlockInformation {
     pub cumulative_difficulty: u128,
 }
 
-//---------------------------------------------------------------------------------------------------- ChainID
 /// A unique ID for an alt chain.
 ///
 /// The inner value is meaningless.
 #[derive(Debug, Copy, Clone, Ord, PartialOrd, Eq, PartialEq, Hash)]
 pub struct ChainId(pub NonZero<u64>);
 
-//---------------------------------------------------------------------------------------------------- Chain
 /// An identifier for a chain.
 #[derive(Debug, Copy, Clone, Ord, PartialOrd, Eq, PartialEq, Hash)]
 pub enum Chain {
@@ -111,7 +105,6 @@ pub enum Chain {
     Alt(ChainId),
 }
 
-//---------------------------------------------------------------------------------------------------- AltBlockInformation
 /// A block on an alternative chain.
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub struct AltBlockInformation {
@@ -141,7 +134,6 @@ pub struct AltBlockInformation {
     pub chain_id: ChainId,
 }
 
-//---------------------------------------------------------------------------------------------------- OutputOnChain
 /// An already existing transaction output.
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub struct OutputOnChain {
@@ -155,6 +147,104 @@ pub struct OutputOnChain {
     pub commitment: EdwardsPoint,
 }
 
+/// Input required to generate an output histogram.
+///
+/// Used in RPC's `get_output_histogram`.
+#[derive(Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct OutputHistogramInput {
+    pub amounts: Vec<u64>,
+    pub min_count: u64,
+    pub max_count: u64,
+    pub unlocked: bool,
+    pub recent_cutoff: u64,
+}
+
+/// A single entry in an output histogram.
+///
+/// Used in RPC's `get_output_histogram`.
+#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct OutputHistogramEntry {
+    pub amount: u64,
+    pub total_instances: u64,
+    pub unlocked_instances: u64,
+    pub recent_instances: u64,
+}
+
+/// Data of summed coinbase transactions.
+///
+/// Used in RPC's `get_coinbase_tx_sum`.
+#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct CoinbaseTxSum {
+    pub emission_amount: u128,
+    pub fee_amount: u128,
+    pub wide_emission_amount: u128,
+    pub wide_fee_amount: u128,
+}
+
+/// Data to create a custom block template.
+///
+/// Used in RPC's `get_miner_data`.
+#[derive(Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct MinerData {
+    pub major_version: u8,
+    pub height: u64,
+    pub prev_id: [u8; 32],
+    pub seed_hash: [u8; 32],
+    pub difficulty: u128,
+    pub median_weight: u64,
+    pub already_generated_coins: u64,
+    pub tx_backlog: Vec<MinerDataTxBacklogEntry>,
+}
+
+/// A transaction in the txpool.
+///
+/// Used in [`MinerData::tx_backlog`].
+#[derive(Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct MinerDataTxBacklogEntry {
+    pub id: [u8; 32],
+    pub weight: u64,
+    pub fee: u64,
+}
+
+/// Information on a [`HardFork`].
+///
+/// Used in RPC's `hard_fork_info`.
+#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct HardForkInfo {
+    pub earliest_height: u64,
+    pub enabled: bool,
+    pub state: u32,
+    pub threshold: u32,
+    pub version: u8,
+    pub votes: u32,
+    pub voting: u8,
+    pub window: u32,
+}
+
+/// Estimated fee data.
+///
+/// Used in RPC's `get_fee_estimate`.
+#[derive(Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct FeeEstimate {
+    pub fee: u64,
+    pub fees: Vec<u64>,
+    pub quantization_mask: u64,
+}
+
+/// Information on a (maybe alternate) chain.
+///
+/// Used in RPC's `get_alternate_chains`.
+#[derive(Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct ChainInfo {
+    pub block_hash: [u8; 32],
+    pub block_hashes: Vec<[u8; 32]>,
+    pub difficulty: u128,
+    pub height: u64,
+    pub length: u64,
+    pub main_chain_parent_block: [u8; 32],
+    pub wide_difficulty: u128,
+}
+
 //---------------------------------------------------------------------------------------------------- Tests
 #[cfg(test)]
 mod test {