feat: add RPC client crate

Cargo.toml

@@ -11,6 +11,7 @@ members = [
   "crates/testing/node-builder",
   "crates/testing/prover",
   "crates/web-client",
+  "crates/rpc-client",
 ]
 
 default-members = ["bin/miden-cli", "crates/rust-client"]

crates/rpc-client/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+authors.workspace      = true
+description            = "RPC client for Miden network"
+edition.workspace      = true
+license.workspace      = true
+name                   = "miden-rpc-client"
+repository.workspace   = true
+rust-version.workspace = true
+version.workspace      = true
+
+[lib]
+crate-type = ["lib"]
+
+[dependencies]
+miden-objects = { workspace = true }
+miden-node-proto = { branch = "next", git = "https://github.com/0xMiden/miden-node" }
+
+tonic = { version = "0.13", features = ["tls-native-roots", "tls-ring", "transport"] }
+tokio = { workspace = true }
+hex = { workspace = true }

crates/rpc-client/README.md

@@ -0,0 +1,43 @@
+# miden-rpc-client
+
+Minimal Miden RPC client.
+
+## Usage
+
+```rust
+use miden_rpc_client::MidenRpcClient;
+
+#[tokio::main]
+async fn main() -> Result<(), String> {
+    // Connect to Miden node
+    let mut client = MidenRpcClient::connect("https://node.example.com").await?;
+
+    // Get node status
+    let status = client.get_status().await?;
+    println!("Node version: {}", status.version);
+
+    // Get account details
+    let account_details = client.get_account_details(&account_id).await?;
+
+    Ok(())
+}
+```
+
+## Available RPC Methods
+
+1. `get_status` - Node status information
+2. `get_block_header` - Block headers with optional MMR proof
+3. `submit_transaction` - Submit single proven transaction
+4. `sync_state` - Full state sync (accounts, notes, nullifiers)
+5. `check_nullifiers` - Nullifier proofs
+6. `get_notes_by_id` - Notes matching IDs
+7. `get_account_commitment` - Fetch account commitment as hex string
+8. `get_account_details` - Full account details including serialized data
+9. `get_account_proof` - Account state proof with storage
+10. `get_block_by_number` - Raw block data
+11. `submit_proven_batch` - Submit transaction batch
+12. `sync_account_vault` - Account vault updates within block range
+13. `sync_notes` - Note synchronization by tags
+14. `sync_storage_maps` - Storage map updates within block range
+
+For advanced usage, proto types are exported and accessible via `client_mut()`.