/is_key_image_spent

binaries/cuprated/src/rpc/helper.rs

@@ -11,7 +11,7 @@ use cuprate_helper::{
     cast::{u64_to_usize, usize_to_u64},
     map::split_u128_into_low_high_bits,
 };
-use cuprate_rpc_types::misc::{BlockHeader, KeyImageSpentStatus};
+use cuprate_rpc_types::misc::BlockHeader;
 use cuprate_types::HardFork;
 
 use crate::{
@@ -166,18 +166,3 @@ pub(super) async fn top_height(state: &mut CupratedRpcHandler) -> Result<(u64, [
     let height = chain_height.saturating_sub(1);
     Ok((height, hash))
 }
-
-/// Check if a key image is spent.
-pub(super) async fn key_image_spent(
-    state: &mut CupratedRpcHandler,
-    key_image: [u8; 32],
-) -> Result<KeyImageSpentStatus, Error> {
-    todo!("impl key image vec check responding KeyImageSpentStatus")
-    // if blockchain::key_image_spent(state, key_image).await? {
-    //     Ok(KeyImageSpentStatus::SpentInBlockchain)
-    // } else if todo!("key image is spent in tx pool") {
-    //     Ok(KeyImageSpentStatus::SpentInPool)
-    // } else {
-    //     Ok(KeyImageSpentStatus::Unspent)
-    // }
-}

binaries/cuprated/src/rpc/other.rs

@@ -1,18 +1,19 @@
 //! RPC request handler functions (other JSON endpoints).
 
-use std::collections::{HashMap, HashSet};
+use std::collections::{BTreeSet, HashMap, HashSet};
 
 use anyhow::{anyhow, Error};
 
 use cuprate_constants::rpc::{
     MAX_RESTRICTED_GLOBAL_FAKE_OUTS_COUNT, RESTRICTED_SPENT_KEY_IMAGES_COUNT,
+    RESTRICTED_TRANSACTIONS_COUNT,
 };
 use cuprate_helper::cast::usize_to_u64;
 use cuprate_hex::Hex;
 use cuprate_rpc_interface::RpcHandler;
 use cuprate_rpc_types::{
     base::{AccessResponseBase, ResponseBase},
-    misc::{KeyImageSpentStatus, Status},
+    misc::{Status, TxEntry, TxEntryType},
     other::{
         GetAltBlocksHashesRequest, GetAltBlocksHashesResponse, GetHeightRequest, GetHeightResponse,
         GetLimitRequest, GetLimitResponse, GetNetStatsRequest, GetNetStatsResponse, GetOutsRequest,
@@ -31,15 +32,20 @@ use cuprate_rpc_types::{
         UpdateRequest, UpdateResponse,
     },
 };
-use cuprate_types::rpc::OutKey;
+use cuprate_types::{
+    rpc::{KeyImageSpentStatus, OutKey, PoolInfo, PoolTxInfo},
+    TxInPool,
+};
+use monero_serai::transaction::Transaction;
 
 use crate::{
     rpc::CupratedRpcHandler,
-    rpc::{helper, request::blockchain},
+    rpc::{
+        helper,
+        request::{blockchain, blockchain_context, blockchain_manager, txpool},
+    },
 };
 
-use super::request::blockchain_manager;
-
 /// Map a [`OtherRequest`] to the function that will lead to a [`OtherResponse`].
 pub(super) async fn map_request(
     state: CupratedRpcHandler,
@@ -112,23 +118,148 @@ async fn get_height(
 
 /// <https://github.com/monero-project/monero/blob/cc73fe71162d564ffda8e549b79a350bca53c454/src/rpc/core_rpc_server.cpp#L979-L1227>
 async fn get_transactions(
-    state: CupratedRpcHandler,
+    mut state: CupratedRpcHandler,
     request: GetTransactionsRequest,
 ) -> Result<GetTransactionsResponse, Error> {
+    if state.is_restricted() && request.txs_hashes.len() > RESTRICTED_TRANSACTIONS_COUNT {
+        return Err(anyhow!(
+            "Too many transactions requested in restricted mode"
+        ));
+    }
+
+    let (txs_in_blockchain, missed_txs) = {
+        let requested_txs = request.txs_hashes.into_iter().map(|tx| tx.0).collect();
+        blockchain::transactions(&mut state.blockchain_read, requested_txs).await?
+    };
+
+    let missed_tx = missed_txs.clone().into_iter().map(Hex).collect();
+
+    // Check the txpool for missed transactions.
+    let txs_in_pool = if missed_txs.is_empty() {
+        vec![]
+    } else {
+        let include_sensitive_txs = !state.is_restricted();
+        txpool::txs_by_hash(&mut state.txpool_read, missed_txs, include_sensitive_txs).await?
+    };
+
+    let (txs, txs_as_json) = {
+        // Prepare the final JSON output.
+        let len = txs_in_blockchain.len() + txs_in_pool.len();
+        let mut txs = Vec::with_capacity(len);
+        let mut txs_as_json = Vec::with_capacity(if request.decode_as_json { len } else { 0 });
+
+        // Map all blockchain transactions.
+        for tx in txs_in_blockchain {
+            let tx_hash = Hex(tx.tx_hash);
+            let pruned_as_hex = hex::encode(tx.pruned_blob);
+            let prunable_as_hex = hex::encode(tx.prunable_blob);
+            let prunable_hash = Hex(tx.prunable_hash);
+
+            let as_json = if request.decode_as_json {
+                let tx = Transaction::read(&mut tx.tx_blob.as_slice())?;
+                let json_type = cuprate_types::json::tx::Transaction::from(tx);
+                let json = serde_json::to_string(&json_type).unwrap();
+                txs_as_json.push(json.clone());
+                json
+            } else {
+                String::new()
+            };
+
+            let tx_entry_type = TxEntryType::Blockchain {
+                block_height: tx.block_height,
+                block_timestamp: tx.block_timestamp,
+                confirmations: tx.confirmations,
+                output_indices: tx.output_indices,
+                in_pool: false,
+            };
+
+            let tx = TxEntry {
+                as_hex: String::new(),
+                as_json,
+                double_spend_seen: false,
+                tx_hash,
+                prunable_as_hex,
+                prunable_hash,
+                pruned_as_hex,
+                tx_entry_type,
+            };
+
+            txs.push(tx);
+        }
+
+        // Map all txpool transactions.
+        for tx_in_pool in txs_in_pool {
+            let TxInPool {
+                tx_blob,
+                tx_hash,
+                double_spend_seen,
+                received_timestamp,
+                relayed,
+            } = tx_in_pool;
+
+            let tx_hash = Hex(tx_hash);
+            let tx = Transaction::read(&mut tx_blob.as_slice())?;
+
+            // TODO: pruned data.
+            let pruned_as_hex = String::new();
+            let prunable_as_hex = String::new();
+            let prunable_hash = Hex([0; 32]);
+
+            let as_json = if request.decode_as_json {
+                let json_type = cuprate_types::json::tx::Transaction::from(tx);
+                let json = serde_json::to_string(&json_type).unwrap();
+                txs_as_json.push(json.clone());
+                json
+            } else {
+                String::new()
+            };
+
+            let tx_entry_type = TxEntryType::Pool {
+                relayed,
+                received_timestamp,
+                in_pool: true,
+            };
+
+            let tx = TxEntry {
+                as_hex: String::new(),
+                as_json,
+                double_spend_seen,
+                tx_hash,
+                prunable_as_hex,
+                prunable_hash,
+                pruned_as_hex,
+                tx_entry_type,
+            };
+
+            txs.push(tx);
+        }
+
+        (txs, txs_as_json)
+    };
+
     Ok(GetTransactionsResponse {
         base: AccessResponseBase::OK,
-        ..todo!()
+        txs_as_hex: vec![],
+        txs_as_json,
+        missed_tx,
+        txs,
     })
 }
 
 /// <https://github.com/monero-project/monero/blob/cc73fe71162d564ffda8e549b79a350bca53c454/src/rpc/core_rpc_server.cpp#L790-L815>
 async fn get_alt_blocks_hashes(
-    state: CupratedRpcHandler,
+    mut state: CupratedRpcHandler,
     request: GetAltBlocksHashesRequest,
 ) -> Result<GetAltBlocksHashesResponse, Error> {
+    let blks_hashes = blockchain::alt_chains(&mut state.blockchain_read)
+        .await?
+        .into_iter()
+        .map(|info| Hex(info.block_hash))
+        .collect();
+
     Ok(GetAltBlocksHashesResponse {
         base: AccessResponseBase::OK,
-        ..todo!()
+        blks_hashes,
     })
 }
 
@@ -137,16 +268,41 @@ async fn is_key_image_spent(
     mut state: CupratedRpcHandler,
     request: IsKeyImageSpentRequest,
 ) -> Result<IsKeyImageSpentResponse, Error> {
-    if state.is_restricted() && request.key_images.len() > RESTRICTED_SPENT_KEY_IMAGES_COUNT {
+    let restricted = state.is_restricted();
+
+    if restricted && request.key_images.len() > RESTRICTED_SPENT_KEY_IMAGES_COUNT {
         return Err(anyhow!("Too many key images queried in restricted mode"));
     }
 
-    let mut spent_status = Vec::with_capacity(request.key_images.len());
+    let key_images = request
+        .key_images
+        .into_iter()
+        .map(|k| k.0)
+        .collect::<Vec<[u8; 32]>>();
 
-    for key_image in request.key_images {
-        let status = helper::key_image_spent(&mut state, key_image.0).await?;
-        spent_status.push(status.to_u8());
+    let mut spent_status = Vec::with_capacity(key_images.len());
+
+    blockchain::key_images_spent(&mut state.blockchain_read, key_images.clone())
+        .await?
+        .into_iter()
+        .for_each(|ki| {
+            if ki {
+                spent_status.push(KeyImageSpentStatus::SpentInBlockchain.to_u8());
+            } else {
+                spent_status.push(KeyImageSpentStatus::Unspent.to_u8());
             }
+        });
+
+    txpool::key_images_spent(&mut state.txpool_read, key_images, !restricted)
+        .await?
+        .into_iter()
+        .for_each(|ki| {
+            if ki {
+                spent_status.push(KeyImageSpentStatus::SpentInPool.to_u8());
+            } else {
+                spent_status.push(KeyImageSpentStatus::Unspent.to_u8());
+            }
+        });
 
     Ok(IsKeyImageSpentResponse {
         base: AccessResponseBase::OK,

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

@@ -1,7 +1,7 @@
 //! Functions to send [`BlockchainReadRequest`]s.
 
 use std::{
-    collections::{HashMap, HashSet},
+    collections::{BTreeSet, HashMap, HashSet},
     ops::Range,
 };
 
@@ -13,8 +13,10 @@ use cuprate_blockchain::service::BlockchainReadHandle;
 use cuprate_helper::cast::{u64_to_usize, usize_to_u64};
 use cuprate_types::{
     blockchain::{BlockchainReadRequest, BlockchainResponse},
-    rpc::{ChainInfo, CoinbaseTxSum, OutputHistogramEntry, OutputHistogramInput},
-    Chain, ExtendedBlockHeader, OutputOnChain,
+    rpc::{
+        ChainInfo, CoinbaseTxSum, KeyImageSpentStatus, OutputHistogramEntry, OutputHistogramInput,
+    },
+    Chain, ExtendedBlockHeader, OutputOnChain, TxInBlockchain,
 };
 
 /// [`BlockchainReadRequest::Block`].
@@ -221,9 +223,9 @@ pub(crate) async fn number_outputs_with_amount(
 /// [`BlockchainReadRequest::KeyImagesSpent`]
 pub(crate) async fn key_images_spent(
     blockchain_read: &mut BlockchainReadHandle,
-    key_images: HashSet<[u8; 32]>,
-) -> Result<bool, Error> {
-    let BlockchainResponse::KeyImagesSpent(is_spent) = blockchain_read
+    key_images: Vec<[u8; 32]>,
+) -> Result<Vec<bool>, Error> {
+    let BlockchainResponse::KeyImagesSpent(status) = blockchain_read
         .ready()
         .await?
         .call(BlockchainReadRequest::KeyImagesSpent(key_images))
@@ -232,7 +234,7 @@ pub(crate) async fn key_images_spent(
         unreachable!();
     };
 
-    Ok(is_spent)
+    Ok(status)
 }
 
 /// [`BlockchainReadRequest::CompactChainHistory`]
@@ -375,3 +377,20 @@ pub(crate) async fn alt_chain_count(
 
     Ok(usize_to_u64(count))
 }
+
+/// [`BlockchainReadRequest::Transactions`].
+pub(crate) async fn transactions(
+    blockchain_read: &mut BlockchainReadHandle,
+    tx_hashes: HashSet<[u8; 32]>,
+) -> Result<(Vec<TxInBlockchain>, Vec<[u8; 32]>), Error> {
+    let BlockchainResponse::Transactions { txs, missed_txs } = blockchain_read
+        .ready()
+        .await?
+        .call(BlockchainReadRequest::Transactions { tx_hashes })
+        .await?
+    else {
+        unreachable!();
+    };
+
+    Ok((txs, missed_txs))
+}

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

@@ -13,7 +13,10 @@ use cuprate_txpool::{
     },
     TxEntry,
 };
-use cuprate_types::rpc::{PoolInfo, PoolInfoFull, PoolInfoIncremental, PoolTxInfo};
+use cuprate_types::{
+    rpc::{PoolInfo, PoolInfoFull, PoolInfoIncremental, PoolTxInfo},
+    TxInPool,
+};
 
 // FIXME: use `anyhow::Error` over `tower::BoxError` in txpool.
 
@@ -60,8 +63,8 @@ pub(crate) async fn pool_info(
     include_sensitive_txs: bool,
     max_tx_count: usize,
     start_time: Option<NonZero<usize>>,
-) -> Result<Vec<PoolInfo>, Error> {
-    let TxpoolReadResponse::PoolInfo(vec) = txpool_read
+) -> Result<PoolInfo, Error> {
+    let TxpoolReadResponse::PoolInfo(pool_info) = txpool_read
         .ready()
         .await
         .map_err(|e| anyhow!(e))?
@@ -76,7 +79,53 @@ pub(crate) async fn pool_info(
         unreachable!();
     };
 
-    Ok(vec)
+    Ok(pool_info)
+}
+
+/// TODO
+pub(crate) async fn txs_by_hash(
+    txpool_read: &mut TxpoolReadHandle,
+    tx_hashes: Vec<[u8; 32]>,
+    include_sensitive_txs: bool,
+) -> Result<Vec<TxInPool>, Error> {
+    let TxpoolReadResponse::TxsByHash(txs_in_pool) = txpool_read
+        .ready()
+        .await
+        .map_err(|e| anyhow!(e))?
+        .call(TxpoolReadRequest::TxsByHash {
+            tx_hashes,
+            include_sensitive_txs,
+        })
+        .await
+        .map_err(|e| anyhow!(e))?
+    else {
+        unreachable!();
+    };
+
+    Ok(txs_in_pool)
+}
+
+/// TODO
+pub(crate) async fn key_images_spent(
+    txpool_read: &mut TxpoolReadHandle,
+    key_images: Vec<[u8; 32]>,
+    include_sensitive_txs: bool,
+) -> Result<Vec<bool>, Error> {
+    let TxpoolReadResponse::KeyImagesSpent(status) = txpool_read
+        .ready()
+        .await
+        .map_err(|e| anyhow!(e))?
+        .call(TxpoolReadRequest::KeyImagesSpent {
+            key_images,
+            include_sensitive_txs,
+        })
+        .await
+        .map_err(|e| anyhow!(e))?
+    else {
+        unreachable!();
+    };
+
+    Ok(status)
 }
 
 /// TODO

consensus/src/transactions.rs

@@ -232,16 +232,18 @@ where
         })
     })?;
 
-    let BlockchainResponse::KeyImagesSpent(kis_spent) = database
+    let BlockchainResponse::KeyImagesSpent(kis_status) = database
         .ready()
         .await?
-        .call(BlockchainReadRequest::KeyImagesSpent(spent_kis))
+        .call(BlockchainReadRequest::KeyImagesSpent(
+            spent_kis.into_iter().collect(),
+        ))
         .await?
     else {
         panic!("Database sent incorrect response!");
     };
 
-    if kis_spent {
+    if kis_status.contains(&true) {
         tracing::debug!("One or more key images in batch already spent.");
         return Err(ConsensusError::Transaction(TransactionError::KeyImageSpent).into());
     }

consensus/tests/verify_correct_txs.rs

@@ -45,7 +45,9 @@ fn dummy_database(outputs: BTreeMap<u64, OutputOnChain>) -> impl Database + Clon
 
                 BlockchainResponse::Outputs(ret)
             }
-            BlockchainReadRequest::KeyImagesSpent(_) => BlockchainResponse::KeyImagesSpent(false),
+            BlockchainReadRequest::KeyImagesSpent(_) => {
+                BlockchainResponse::KeyImagesSpent(vec![false])
+            }
             _ => panic!("Database request not needed for this test"),
         }))
     })

rpc/types/src/misc/mod.rs

@@ -14,7 +14,6 @@
 //---------------------------------------------------------------------------------------------------- Mod
 mod binary_string;
 mod distribution;
-mod key_image_spent_status;
 mod requested_info;
 mod status;
 mod tx_entry;
@@ -22,10 +21,9 @@ mod types;
 
 pub use binary_string::BinaryString;
 pub use distribution::{Distribution, DistributionCompressedBinary, DistributionUncompressed};
-pub use key_image_spent_status::KeyImageSpentStatus;
 pub use requested_info::RequestedInfo;
 pub use status::Status;
-pub use tx_entry::TxEntry;
+pub use tx_entry::{TxEntry, TxEntryType};
 pub use types::{
     BlockHeader, ChainInfo, ConnectionInfo, GetBan, GetOutputsOut, HistogramEntry, OutKeyBin,
     SetBan, Span, SpentKeyImageInfo, SyncInfoPeer, TxInfo,

rpc/types/src/misc/tx_entry.rs

@@ -11,6 +11,8 @@ use cuprate_epee_encoding::{
     EpeeObject, EpeeObjectBuilder,
 };
 
+use cuprate_hex::Hex;
+
 #[cfg(feature = "serde")]
 use crate::serde::{serde_false, serde_true};
 
@@ -28,100 +30,63 @@ use crate::serde::{serde_false, serde_true};
 ///
 /// It is only implemented to satisfy the RPC type generator
 /// macro, which requires all objects to be serde + epee.
-///
-/// # Example
-/// ```rust
-/// use cuprate_rpc_types::misc::*;
-/// use serde_json::{json, from_value};
-///
-/// let json = json!({
-///     "as_hex": String::default(),
-///     "as_json": String::default(),
-///     "block_height": u64::default(),
-///     "block_timestamp": u64::default(),
-///     "confirmations": u64::default(),
-///     "double_spend_seen": bool::default(),
-///     "output_indices": Vec::<u64>::default(),
-///     "prunable_as_hex": String::default(),
-///     "prunable_hash": String::default(),
-///     "pruned_as_hex": String::default(),
-///     "tx_hash": String::default(),
-///     "in_pool": bool::default(),
-/// });
-/// let tx_entry = from_value::<TxEntry>(json).unwrap();
-/// assert!(matches!(tx_entry, TxEntry::InPool { .. }));
-///
-/// let json = json!({
-///     "as_hex": String::default(),
-///     "as_json": String::default(),
-///     "double_spend_seen": bool::default(),
-///     "prunable_as_hex": String::default(),
-///     "prunable_hash": String::default(),
-///     "pruned_as_hex": String::default(),
-///     "received_timestamp": u64::default(),
-///     "relayed": bool::default(),
-///     "tx_hash": String::default(),
-///     "in_pool": bool::default(),
-/// });
-/// let tx_entry = from_value::<TxEntry>(json).unwrap();
-/// assert!(matches!(tx_entry, TxEntry::NotInPool { .. }));
-/// ```
+#[derive(Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub struct TxEntry {
+    /// `cuprate_types::json::tx::Transaction` should be used
+    /// to create this JSON string in a type-safe manner.
+    pub as_json: String,
+
+    pub as_hex: String,
+    pub double_spend_seen: bool,
+    pub tx_hash: Hex<32>,
+    pub prunable_as_hex: String,
+    pub prunable_hash: Hex<32>,
+    pub pruned_as_hex: String,
+
+    #[cfg_attr(feature = "serde", serde(flatten))]
+    pub tx_entry_type: TxEntryType,
+}
+
+/// Different fields in [`TxEntry`] variants.
 #[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 #[cfg_attr(feature = "serde", serde(untagged))]
-pub enum TxEntry {
-    /// This entry exists in the transaction pool.
-    InPool {
-        /// This field is [flattened](https://serde.rs/field-attrs.html#flatten).
-        #[cfg_attr(feature = "serde", serde(flatten))]
-        prefix: TxEntryPrefix,
+pub enum TxEntryType {
+    /// This transaction exists in the blockchain.
+    Blockchain {
         block_height: u64,
         block_timestamp: u64,
         confirmations: u64,
         output_indices: Vec<u64>,
-        #[cfg_attr(feature = "serde", serde(serialize_with = "serde_true"))]
-        /// Will always be serialized as `true`.
+
+        /// Will always be serialized as `false`.
+        #[cfg_attr(feature = "serde", serde(serialize_with = "serde_false"))]
         in_pool: bool,
     },
-    /// This entry _does not_ exist in the transaction pool.
-    NotInPool {
-        /// This field is [flattened](https://serde.rs/field-attrs.html#flatten).
-        #[cfg_attr(feature = "serde", serde(flatten))]
-        prefix: TxEntryPrefix,
+
+    /// This transaction exists in the transaction pool.
+    Pool {
         received_timestamp: u64,
         relayed: bool,
-        #[cfg_attr(feature = "serde", serde(serialize_with = "serde_false"))]
-        /// Will always be serialized as `false`.
+
+        /// Will always be serialized as `true`.
+        #[cfg_attr(feature = "serde", serde(serialize_with = "serde_true"))]
         in_pool: bool,
     },
 }
 
-impl Default for TxEntry {
+impl Default for TxEntryType {
     fn default() -> Self {
-        Self::NotInPool {
-            prefix: Default::default(),
-            received_timestamp: u64::default(),
-            relayed: bool::default(),
-            in_pool: false,
+        Self::Blockchain {
+            block_height: Default::default(),
+            block_timestamp: Default::default(),
+            confirmations: Default::default(),
+            output_indices: Default::default(),
+            in_pool: Default::default(),
         }
     }
 }
-
-/// Common fields in all [`TxEntry`] variants.
-#[derive(Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct TxEntryPrefix {
-    as_hex: String,
-    /// `cuprate_rpc_types::json::tx::Transaction` should be used
-    /// to create this JSON string in a type-safe manner.
-    as_json: String,
-    double_spend_seen: bool,
-    tx_hash: String,
-    prunable_as_hex: String,
-    prunable_hash: String,
-    pruned_as_hex: String,
-}
-
 //---------------------------------------------------------------------------------------------------- Epee
 #[cfg(feature = "epee")]
 impl EpeeObjectBuilder<TxEntry> for () {

storage/blockchain/src/service/read.rs

@@ -134,6 +134,7 @@ fn map_request(
         R::CoinbaseTxSum { height, count } => coinbase_tx_sum(env, height, count),
         R::AltChains => alt_chains(env),
         R::AltChainCount => alt_chain_count(env),
+        R::Transactions { tx_hashes } => transactions(env, tx_hashes),
     }
 
     /* SOMEDAY: post-request handling, run some code for each request? */
@@ -506,7 +507,7 @@ fn number_outputs_with_amount(env: &ConcreteEnv, amounts: Vec<Amount>) -> Respon
 
 /// [`BlockchainReadRequest::KeyImagesSpent`].
 #[inline]
-fn key_images_spent(env: &ConcreteEnv, key_images: HashSet<KeyImage>) -> ResponseResult {
+fn key_images_spent(env: &ConcreteEnv, key_images: Vec<KeyImage>) -> ResponseResult {
     // Prepare tx/tables in `ThreadLocal`.
     let env_inner = env.env_inner();
     let tx_ro = thread_local(env);
@@ -519,26 +520,13 @@ fn key_images_spent(env: &ConcreteEnv, key_images: HashSet<KeyImage>) -> Respons
         key_image_exists(&key_image, tables.key_images())
     };
 
-    // FIXME:
-    // Create/use `enum cuprate_types::Exist { Does, DoesNot }`
-    // or similar instead of `bool` for clarity.
-    // <https://github.com/Cuprate/cuprate/pull/113#discussion_r1581536526>
-    //
     // Collect results using `rayon`.
-    match key_images
+    Ok(BlockchainResponse::KeyImagesSpent(
+        key_images
             .into_par_iter()
             .map(key_image_exists)
-        // If the result is either:
-        // `Ok(true)` => a key image was found, return early
-        // `Err` => an error was found, return early
-        //
-        // Else, `Ok(false)` will continue the iterator.
-        .find_any(|result| !matches!(result, Ok(false)))
-    {
-        None | Some(Ok(false)) => Ok(BlockchainResponse::KeyImagesSpent(false)), // Key image was NOT found.
-        Some(Ok(true)) => Ok(BlockchainResponse::KeyImagesSpent(true)), // Key image was found.
-        Some(Err(e)) => Err(e), // A database error occurred.
-    }
+            .collect::<DbResult<_>>()?,
+    ))
 }
 
 /// [`BlockchainReadRequest::CompactChainHistory`]
@@ -783,3 +771,11 @@ fn alt_chains(env: &ConcreteEnv) -> ResponseResult {
 fn alt_chain_count(env: &ConcreteEnv) -> ResponseResult {
     Ok(BlockchainResponse::AltChainCount(todo!()))
 }
+
+/// [`BlockchainReadRequest::Transactions`]
+fn transactions(env: &ConcreteEnv, tx_hashes: HashSet<[u8; 32]>) -> ResponseResult {
+    Ok(BlockchainResponse::Transactions {
+        txs: todo!(),
+        missed_txs: todo!(),
+    })
+}

storage/blockchain/src/service/tests.rs

@@ -179,8 +179,8 @@ async fn test_template(
     ));
 
     // Contains a fake non-spent key-image.
-    let ki_req = HashSet::from([[0; 32]]);
-    let ki_resp = Ok(BlockchainResponse::KeyImagesSpent(false));
+    let ki_req = vec![[0; 32]];
+    let ki_resp = Ok(BlockchainResponse::KeyImagesSpent(vec![false]));
 
     //----------------------------------------------------------------------- Assert expected response
     // Assert read requests lead to the expected responses.
@@ -232,10 +232,13 @@ async fn test_template(
     // Assert each key image we inserted comes back as "spent".
     for key_image in tables.key_images_iter().keys().unwrap() {
         let key_image = key_image.unwrap();
-        let request = BlockchainReadRequest::KeyImagesSpent(HashSet::from([key_image]));
+        let request = BlockchainReadRequest::KeyImagesSpent(vec![key_image]);
         let response = reader.clone().oneshot(request).await;
         println!("response: {response:#?}, key_image: {key_image:#?}");
-        assert_eq!(response.unwrap(), BlockchainResponse::KeyImagesSpent(true));
+        assert_eq!(
+            response.unwrap(),
+            BlockchainResponse::KeyImagesSpent(vec![true])
+        );
     }
 
     //----------------------------------------------------------------------- Output checks

storage/txpool/src/service/interface.rs

@@ -7,7 +7,7 @@ use std::{
     sync::Arc,
 };
 
-use cuprate_types::{rpc::PoolInfo, TransactionVerificationData};
+use cuprate_types::{rpc::PoolInfo, TransactionVerificationData, TxInPool};
 
 use crate::{
     tx::TxEntry,
@@ -52,6 +52,18 @@ pub enum TxpoolReadRequest {
         /// TODO
         start_time: Option<NonZero<usize>>,
     },
+
+    /// TODO
+    TxsByHash {
+        tx_hashes: Vec<[u8; 32]>,
+        include_sensitive_txs: bool,
+    },
+
+    /// TODO
+    KeyImagesSpent {
+        key_images: Vec<[u8; 32]>,
+        include_sensitive_txs: bool,
+    },
 }
 
 //---------------------------------------------------------------------------------------------------- TxpoolReadResponse
@@ -93,7 +105,13 @@ pub enum TxpoolReadResponse {
     Size(usize),
 
     /// Response to [`TxpoolReadRequest::PoolInfo`].
-    PoolInfo(Vec<PoolInfo>),
+    PoolInfo(PoolInfo),
+
+    /// Response to [`TxpoolReadRequest::TxsByHash`].
+    TxsByHash(Vec<TxInPool>),
+
+    /// Response to [`TxpoolReadRequest::KeyImagesSpent`].
+    KeyImagesSpent(Vec<bool>),
 }
 
 //---------------------------------------------------------------------------------------------------- TxpoolWriteRequest

storage/txpool/src/service/read.rs

@@ -2,6 +2,7 @@
     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>"
 )]
 use std::{
@@ -79,7 +80,15 @@ fn map_request(
             include_sensitive_txs,
             max_tx_count,
             start_time,
-        } => pool_info(include_sensitive_txs, max_tx_count, start_time),
+        } => pool_info(env, include_sensitive_txs, max_tx_count, start_time),
+        TxpoolReadRequest::TxsByHash {
+            tx_hashes,
+            include_sensitive_txs,
+        } => txs_by_hash(env, tx_hashes, include_sensitive_txs),
+        TxpoolReadRequest::KeyImagesSpent {
+            key_images,
+            include_sensitive_txs,
+        } => key_images_spent(env, key_images, include_sensitive_txs),
     }
 }
 
@@ -215,9 +224,28 @@ fn size(env: &ConcreteEnv, include_sensitive_txs: bool) -> ReadResponseResult {
 
 /// [`TxpoolReadRequest::PoolInfo`].
 fn pool_info(
+    env: &ConcreteEnv,
     include_sensitive_txs: bool,
     max_tx_count: usize,
     start_time: Option<NonZero<usize>>,
 ) -> ReadResponseResult {
     Ok(TxpoolReadResponse::PoolInfo(todo!()))
 }
+
+/// [`TxpoolReadRequest::TxsByHash`].
+fn txs_by_hash(
+    env: &ConcreteEnv,
+    tx_hashes: Vec<[u8; 32]>,
+    include_sensitive_txs: bool,
+) -> ReadResponseResult {
+    Ok(TxpoolReadResponse::TxsByHash(todo!()))
+}
+
+/// [`TxpoolReadRequest::KeyImagesSpent`].
+fn key_images_spent(
+    env: &ConcreteEnv,
+    key_images: Vec<[u8; 32]>,
+    include_sensitive_txs: bool,
+) -> ReadResponseResult {
+    Ok(TxpoolReadResponse::KeyImagesSpent(todo!()))
+}

types/types/src/blockchain.rs

@@ -11,12 +11,11 @@ use std::{
 use monero_serai::block::Block;
 
 use crate::{
+    rpc::{ChainInfo, CoinbaseTxSum, OutputHistogramEntry, OutputHistogramInput},
     types::{Chain, ExtendedBlockHeader, OutputOnChain, TxsInBlock, VerifiedBlockInformation},
-    AltBlockInformation, BlockCompleteEntry, ChainId,
+    AltBlockInformation, BlockCompleteEntry, ChainId, TxInBlockchain,
 };
 
-use crate::rpc::{ChainInfo, CoinbaseTxSum, OutputHistogramEntry, OutputHistogramInput};
-
 //---------------------------------------------------------------------------------------------------- ReadRequest
 /// A read request to the blockchain database.
 ///
@@ -94,10 +93,10 @@ pub enum BlockchainReadRequest {
     /// The input is a list of output amounts.
     NumberOutputsWithAmount(Vec<u64>),
 
-    /// Check that all key images within a set are not spent.
+    /// Check the spend status of key images.
     ///
     /// Input is a set of key images.
-    KeyImagesSpent(HashSet<[u8; 32]>),
+    KeyImagesSpent(Vec<[u8; 32]>),
 
     /// A request for the compact chain history.
     CompactChainHistory,
@@ -161,6 +160,9 @@ pub enum BlockchainReadRequest {
 
     /// Get the amount of alternative chains that exist.
     AltChainCount,
+
+    /// TODO
+    Transactions { tx_hashes: HashSet<[u8; 32]> },
 }
 
 //---------------------------------------------------------------------------------------------------- WriteRequest
@@ -268,11 +270,11 @@ pub enum BlockchainResponse {
 
     /// Response to [`BlockchainReadRequest::KeyImagesSpent`].
     ///
-    /// The inner value is `true` if _any_ of the key images
-    /// were spent (existed in the database already).
+    /// Inner value is a `Vec` the same length as the input.
     ///
-    /// The inner value is `false` if _none_ of the key images were spent.
-    KeyImagesSpent(bool),
+    /// The index of each entry corresponds with the request.
+    /// `true` means that the key image was spent.
+    KeyImagesSpent(Vec<bool>),
 
     /// Response to [`BlockchainReadRequest::CompactChainHistory`].
     CompactChainHistory {
@@ -348,6 +350,14 @@ pub enum BlockchainResponse {
     /// Response to [`BlockchainReadRequest::AltChainCount`].
     AltChainCount(usize),
 
+    /// Response to [`BlockchainReadRequest::Transactions`].
+    Transactions {
+        /// The transaction blobs found.
+        txs: Vec<TxInBlockchain>,
+        /// The hashes of any transactions that could not be found.
+        missed_txs: Vec<[u8; 32]>,
+    },
+
     //------------------------------------------------------ Writes
     /// A generic Ok response to indicate a request was successfully handled.
     ///

types/types/src/lib.rs

@@ -25,7 +25,7 @@ pub use transaction_verification_data::{
 };
 pub use types::{
     AltBlockInformation, BlockTemplate, Chain, ChainId, ExtendedBlockHeader, OutputOnChain,
-    TxsInBlock, VerifiedBlockInformation, VerifiedTransactionInformation,
+    TxInBlockchain, TxInPool, TxsInBlock, VerifiedBlockInformation, VerifiedTransactionInformation,
 };
 
 //---------------------------------------------------------------------------------------------------- Feature-gated

types/types/src/rpc/key_image_spent_status.rs

@@ -12,12 +12,7 @@ use cuprate_epee_encoding::{
 };
 
 //---------------------------------------------------------------------------------------------------- KeyImageSpentStatus
-#[doc = crate::macros::monero_definition_link!(
-    "cc73fe71162d564ffda8e549b79a350bca53c454",
-    "rpc/core_rpc_server_commands_defs.h",
-    456..=460
-)]
-/// Used in [`crate::other::IsKeyImageSpentResponse`].
+/// Used in RPC's `/is_key_image_spent`.
 #[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 #[cfg_attr(feature = "serde", serde(try_from = "u8", into = "u8"))]
@@ -32,7 +27,7 @@ impl KeyImageSpentStatus {
     /// Convert [`Self`] to a [`u8`].
     ///
     /// ```rust
-    /// use cuprate_rpc_types::misc::KeyImageSpentStatus as K;
+    /// use cuprate_types::rpc::KeyImageSpentStatus as K;
     ///
     /// assert_eq!(K::Unspent.to_u8(), 0);
     /// assert_eq!(K::SpentInBlockchain.to_u8(), 1);
@@ -52,7 +47,7 @@ impl KeyImageSpentStatus {
     /// This returns [`None`] if `u > 2`.
     ///
     /// ```rust
-    /// use cuprate_rpc_types::misc::KeyImageSpentStatus as K;
+    /// use cuprate_types::rpc::KeyImageSpentStatus as K;
     ///
     /// assert_eq!(K::from_u8(0), Some(K::Unspent));
     /// assert_eq!(K::from_u8(1), Some(K::SpentInBlockchain));

types/types/src/rpc/mod.rs

@@ -5,10 +5,12 @@
 //! instead of `hash: String`, this module's types would use something like
 //! `hash: [u8; 32]`.
 
+mod key_image_spent_status;
 mod pool_info;
 mod pool_info_extent;
 mod types;
 
+pub use key_image_spent_status::KeyImageSpentStatus;
 pub use pool_info::PoolInfo;
 pub use pool_info_extent::PoolInfoExtent;
 pub use types::{

types/types/src/types.rs

@@ -167,6 +167,30 @@ pub struct BlockTemplate {
     pub next_seed_hash: [u8; 32],
 }
 
+/// TODO
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct TxInBlockchain {
+    pub block_height: u64,
+    pub block_timestamp: u64,
+    pub confirmations: u64,
+    pub output_indices: Vec<u64>,
+    pub tx_hash: [u8; 32],
+    pub tx_blob: Vec<u8>,
+    pub pruned_blob: Vec<u8>,
+    pub prunable_blob: Vec<u8>,
+    pub prunable_hash: [u8; 32],
+}
+
+/// TODO
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct TxInPool {
+    pub tx_blob: Vec<u8>,
+    pub tx_hash: [u8; 32],
+    pub double_spend_seen: bool,
+    pub received_timestamp: u64,
+    pub relayed: bool,
+}
+
 //---------------------------------------------------------------------------------------------------- Tests
 #[cfg(test)]
 mod test {