feat: Integrate RPC with Validator for transaction validation

CHANGELOG.md

@@ -12,6 +12,7 @@
 - Added chain tip to the block producer status ([#1419](https://github.com/0xMiden/miden-node/pull/1419)).
 - The mempool's transaction capacity is now configurable ([#1433](https://github.com/0xMiden/miden-node/pull/1433)).
 - Renamed card's names in the `miden-network-monitor` binary ([#1441](https://github.com/0xMiden/miden-node/pull/1441)).
+- Integrated RPC stack with Validator component for transaction validation ([#1457](https://github.com/0xMiden/miden-node/pull/1457)).
 
 ### Changes
 

bin/network-monitor/src/counter.rs

@@ -10,7 +10,7 @@ use std::sync::atomic::{AtomicU64, Ordering};
 use anyhow::{Context, Result};
 use miden_lib::AuthScheme;
 use miden_lib::account::interface::AccountInterface;
-use miden_lib::utils::ScriptBuilder;
+use miden_lib::utils::CodeBuilder;
 use miden_node_proto::clients::RpcClient;
 use miden_node_proto::generated::rpc::BlockHeaderByNumberRequest;
 use miden_node_proto::generated::transaction::ProvenTransaction;
@@ -528,7 +528,7 @@ async fn create_and_submit_network_note(
 fn create_increment_script() -> Result<(NoteScript, Library)> {
     let library = get_counter_library()?;
 
-    let script_builder = ScriptBuilder::new(true)
+    let script_builder = CodeBuilder::new(true)
         .with_dynamically_linked_library(&library)
         .context("Failed to create script builder with library")?;
 

bin/network-monitor/src/deploy/counter.rs

@@ -4,7 +4,7 @@ use std::path::Path;
 
 use anyhow::Result;
 use miden_lib::testing::account_component::IncrNonceAuthComponent;
-use miden_lib::transaction::TransactionKernel;
+use miden_lib::utils::CodeBuilder;
 use miden_objects::account::{
     Account,
     AccountBuilder,
@@ -50,12 +50,11 @@ pub fn create_counter_account(owner_account_id: AccountId) -> Result<Account> {
 
     let counter_slot = StorageSlot::with_value(COUNTER_SLOT_NAME.clone(), Word::empty());
 
-    let account_code = AccountComponent::compile(
-        script,
-        TransactionKernel::assembler(),
-        vec![counter_slot, owner_id_slot],
-    )?
-    .with_supports_all_types();
+    let component_code =
+        CodeBuilder::default().compile_component_code("counter::program", script)?;
+
+    let account_code = AccountComponent::new(component_code, vec![counter_slot, owner_id_slot])?
+        .with_supports_all_types();
 
     let incr_nonce_auth: AccountComponent = IncrNonceAuthComponent.into();
 

bin/node/src/commands/bundled.rs

@@ -283,10 +283,13 @@ impl BundledCommand {
                     .context("Failed to parse URL")?;
                 let block_producer_url = Url::parse(&format!("http://{block_producer_address}"))
                     .context("Failed to parse URL")?;
+                let validator_url = Url::parse(&format!("http://{validator_address}"))
+                    .context("Failed to parse URL")?;
                 Rpc {
                     listener: grpc_rpc,
                     store_url,
                     block_producer_url: Some(block_producer_url),
+                    validator_url,
                     grpc_timeout,
                 }
                 .serve()

bin/node/src/commands/rpc.rs

@@ -5,7 +5,7 @@ use miden_node_rpc::Rpc;
 use miden_node_utils::grpc::UrlExt;
 use url::Url;
 
-use super::{ENV_BLOCK_PRODUCER_URL, ENV_RPC_URL, ENV_STORE_RPC_URL};
+use super::{ENV_BLOCK_PRODUCER_URL, ENV_RPC_URL, ENV_STORE_RPC_URL, ENV_VALIDATOR_URL};
 use crate::commands::{DEFAULT_TIMEOUT, ENV_ENABLE_OTEL, duration_to_human_readable_string};
 
 #[derive(clap::Subcommand)]
@@ -25,6 +25,10 @@ pub enum RpcCommand {
         #[arg(long = "block-producer.url", env = ENV_BLOCK_PRODUCER_URL, value_name = "URL")]
         block_producer_url: Option<Url>,
 
+        /// The validator's gRPC url.
+        #[arg(long = "validator.url", env = ENV_VALIDATOR_URL, value_name = "URL")]
+        validator_url: Url,
+
         /// Enables the exporting of traces for OpenTelemetry.
         ///
         /// This can be further configured using environment variables as defined in the official
@@ -51,6 +55,7 @@ impl RpcCommand {
             url,
             store_url,
             block_producer_url,
+            validator_url,
             enable_otel: _,
             grpc_timeout,
         } = self;
@@ -64,6 +69,7 @@ impl RpcCommand {
             listener,
             store_url,
             block_producer_url,
+            validator_url,
             grpc_timeout,
         }
         .serve()

bin/stress-test/src/seeding/mod.rs

@@ -443,13 +443,11 @@ fn create_emit_note_tx(
 ) -> ProvenTransaction {
     let initial_account_hash = faucet.commitment();
 
-    let slot = faucet.storage().get_item(BasicFungibleFaucet::metadata_slot_name()).unwrap();
+    let metadata_slot_name = AccountStorage::faucet_sysdata_slot();
+    let slot = faucet.storage().get_item(metadata_slot_name).unwrap();
     faucet
         .storage_mut()
-        .set_item(
-            AccountStorage::faucet_metadata_slot(),
-            [slot[0], slot[1], slot[2], slot[3] + Felt::new(10)].into(),
-        )
+        .set_item(metadata_slot_name, [slot[0], slot[1], slot[2], slot[3] + Felt::new(10)].into())
         .unwrap();
 
     faucet.increment_nonce(ONE).unwrap();

crates/proto/src/domain/account.rs

@@ -8,11 +8,13 @@ use miden_objects::account::{
     AccountId,
     AccountStorageHeader,
     StorageMap,
+    StorageSlotHeader,
     StorageSlotName,
     StorageSlotType,
 };
 use miden_objects::asset::{Asset, AssetVault};
-use miden_objects::block::{AccountWitness, BlockNumber};
+use miden_objects::block::BlockNumber;
+use miden_objects::block::account_tree::AccountWitness;
 use miden_objects::crypto::merkle::SparseMerklePath;
 use miden_objects::note::{NoteExecutionMode, NoteTag};
 use miden_objects::utils::{Deserializable, DeserializationError, Serializable};
@@ -167,18 +169,18 @@ impl TryFrom<proto::account::AccountStorageHeader> for AccountStorageHeader {
     fn try_from(value: proto::account::AccountStorageHeader) -> Result<Self, Self::Error> {
         let proto::account::AccountStorageHeader { slots } = value;
 
-        let items = slots
+        let slot_headers = slots
             .into_iter()
             .map(|slot| {
                 let slot_name = StorageSlotName::new(slot.slot_name)?;
                 let slot_type = storage_slot_type_from_raw(slot.slot_type)?;
                 let commitment =
                     slot.commitment.ok_or(ConversionError::NotAValidFelt)?.try_into()?;
-                Ok((slot_name, slot_type, commitment))
+                Ok(StorageSlotHeader::new(slot_name, slot_type, commitment))
             })
             .collect::<Result<Vec<_>, ConversionError>>()?;
 
-        Ok(AccountStorageHeader::new(items)?)
+        Ok(AccountStorageHeader::new(slot_headers)?)
     }
 }
 
@@ -333,12 +335,10 @@ impl From<AccountStorageHeader> for proto::account::AccountStorageHeader {
     fn from(value: AccountStorageHeader) -> Self {
         let slots = value
             .slots()
-            .map(|(slot_name, slot_type, slot_value)| {
-                proto::account::account_storage_header::StorageSlot {
-                    slot_name: slot_name.to_string(),
-                    slot_type: storage_slot_type_to_raw(*slot_type),
-                    commitment: Some(proto::primitives::Digest::from(*slot_value)),
-                }
+            .map(|slot_header| proto::account::account_storage_header::StorageSlot {
+                slot_name: slot_header.name().to_string(),
+                slot_type: storage_slot_type_to_raw(slot_header.slot_type()),
+                commitment: Some(proto::primitives::Digest::from(slot_header.value())),
             })
             .collect();
 

crates/proto/src/domain/block.rs

@@ -2,13 +2,8 @@ use std::collections::BTreeMap;
 use std::ops::RangeInclusive;
 
 use miden_objects::account::AccountId;
-use miden_objects::block::{
-    BlockHeader,
-    BlockInputs,
-    BlockNumber,
-    FeeParameters,
-    NullifierWitness,
-};
+use miden_objects::block::nullifier_tree::NullifierWitness;
+use miden_objects::block::{BlockHeader, BlockInputs, BlockNumber, FeeParameters};
 use miden_objects::crypto::dsa::ecdsa_k256_keccak::{PublicKey, Signature};
 use miden_objects::note::{NoteId, NoteInclusionProof};
 use miden_objects::transaction::PartialBlockchain;

crates/rpc/src/server/api.rs

@@ -2,7 +2,7 @@ use std::sync::Arc;
 use std::time::Duration;
 
 use anyhow::Context;
-use miden_node_proto::clients::{BlockProducerClient, Builder, StoreRpcClient};
+use miden_node_proto::clients::{BlockProducerClient, Builder, StoreRpcClient, ValidatorClient};
 use miden_node_proto::errors::ConversionError;
 use miden_node_proto::generated::rpc::MempoolStats;
 use miden_node_proto::generated::rpc::api_server::{self, Api};
@@ -20,12 +20,7 @@ use miden_objects::account::AccountId;
 use miden_objects::batch::ProvenBatch;
 use miden_objects::block::{BlockHeader, BlockNumber};
 use miden_objects::note::{Note, NoteRecipient, NoteScript};
-use miden_objects::transaction::{
-    OutputNote,
-    ProvenTransaction,
-    ProvenTransactionBuilder,
-    TransactionInputs,
-};
+use miden_objects::transaction::{OutputNote, ProvenTransaction, ProvenTransactionBuilder};
 use miden_objects::utils::serde::{Deserializable, Serializable};
 use miden_objects::{MIN_PROOF_SECURITY_LEVEL, Word};
 use miden_tx::TransactionVerifier;
@@ -34,19 +29,19 @@ use tracing::{debug, info, instrument, warn};
 use url::Url;
 
 use crate::COMPONENT;
-use crate::server::validator;
 
 // RPC SERVICE
 // ================================================================================================
 
 pub struct RpcService {
     store: StoreRpcClient,
     block_producer: Option<BlockProducerClient>,
+    validator: ValidatorClient,
     genesis_commitment: Option<Word>,
 }
 
 impl RpcService {
-    pub(super) fn new(store_url: Url, block_producer_url: Option<Url>) -> Self {
+    pub(super) fn new(store_url: Url, block_producer_url: Option<Url>, validator_url: Url) -> Self {
         let store = {
             info!(target: COMPONENT, store_endpoint = %store_url, "Initializing store client");
             Builder::new(store_url)
@@ -73,9 +68,25 @@ impl RpcService {
                 .connect_lazy::<BlockProducerClient>()
         });
 
+        let validator = {
+            info!(
+                target: COMPONENT,
+                validator_endpoint = %validator_url,
+                "Initializing validator client",
+            );
+            Builder::new(validator_url)
+                .without_tls()
+                .without_timeout()
+                .without_metadata_version()
+                .without_metadata_genesis()
+                .with_otel_context_injection()
+                .connect_lazy::<ValidatorClient>()
+        };
+
         Self {
             store,
             block_producer,
+            validator,
             genesis_commitment: None,
         }
     }
@@ -379,26 +390,22 @@ impl api_server::Api for RpcService {
         })?;
 
         // If transaction inputs are provided, re-execute the transaction to validate it.
-        if let Some(tx_inputs_bytes) = &request.transaction_inputs {
-            // Deserialize the transaction inputs.
-            let tx_inputs = TransactionInputs::read_from_bytes(tx_inputs_bytes).map_err(|err| {
-                Status::invalid_argument(err.as_report_context("Invalid transaction inputs"))
-            })?;
-            // Re-execute the transaction.
-            match validator::re_execute_transaction(tx_inputs).await {
-                Ok(_executed_tx) => {
+        if request.transaction_inputs.is_some() {
+            // Re-execute the transaction via the Validator.
+            match self.validator.clone().submit_proven_transaction(request.clone()).await {
+                Ok(_) => {
                     debug!(
                         target = COMPONENT,
                         tx_id = %tx.id().to_hex(),
-                        "Transaction re-execution successful"
+                        "Transaction validation successful"
                     );
                 },
                 Err(e) => {
                     warn!(
                         target = COMPONENT,
                         tx_id = %tx.id().to_hex(),
                         error = %e,
-                        "Transaction re-execution failed, but continuing with submission"
+                        "Transaction validation failed, but continuing with submission"
                     );
                 },
             }

crates/rpc/src/server/mod.rs

@@ -21,17 +21,17 @@ use crate::server::health::HealthCheckLayer;
 mod accept;
 mod api;
 mod health;
-mod validator;
 
 /// The RPC server component.
 ///
 /// On startup, binds to the provided listener and starts serving the RPC API.
-/// It connects lazily to the store and block producer components as needed.
+/// It connects lazily to the store, validator and block producer components as needed.
 /// Requests will fail if the components are not available.
 pub struct Rpc {
     pub listener: TcpListener,
     pub store_url: Url,
     pub block_producer_url: Option<Url>,
+    pub validator_url: Url,
     /// Server-side timeout for an individual gRPC request.
     ///
     /// If the handler takes longer than this duration, the server cancels the call.
@@ -44,7 +44,11 @@ impl Rpc {
     /// Note: Executes in place (i.e. not spawned) and will run indefinitely until
     ///       a fatal error is encountered.
     pub async fn serve(self) -> anyhow::Result<()> {
-        let mut api = api::RpcService::new(self.store_url.clone(), self.block_producer_url.clone());
+        let mut api = api::RpcService::new(
+            self.store_url.clone(),
+            self.block_producer_url.clone(),
+            self.validator_url,
+        );
 
         let genesis = api
             .get_genesis_header_with_retry()