Offsite eth proving service (#66)

* dummy prover

* dummy prover

* simple loop pooling

* binary dir

* delete binaries

* absolute binary paths

* revert processor change

* revert processor change

* still reverting

* improve prover with more idiomatic rust code

sz-poc-offsite-2025/Cargo.toml

@@ -1,5 +1,5 @@
 [workspace]
-members = ["evm/processor", "evm/sequencer-node"]
+members = ["evm/processor", "evm/sequencer-node", "evm/prover"]
 resolver = "3"
 
 [workspace.package]
@@ -9,6 +9,7 @@ edition = "2024"
 # Internal
 evm-processor = { path = "evm/processor" }
 evm-sequencer-node = { path = "evm/sequencer-node" }
+evm-prover = { path = "evm/prover" }
 
 # External
 eyre = { version = "0.6" }

sz-poc-offsite-2025/evm/processor/src/lib.rs

@@ -1,9 +1,9 @@
-use reth_ethereum::Block;
-use executor_http_client::{ExecutorHttpClient, Error};
 pub use executor_http_client::BasicAuthCredentials;
-use reqwest::Url;
-use reth_tracing::tracing::{info, error};
+use executor_http_client::{Error, ExecutorHttpClient};
 use kzgrs_backend::{dispersal::Metadata, encoder::DaEncoderParams};
+use reqwest::Url;
+use reth_ethereum::Block;
+use reth_tracing::tracing::{error, info};
 
 pub struct Processor {
     da: NomosDa,
@@ -11,9 +11,7 @@ pub struct Processor {
 
 impl Processor {
     pub fn new(da: NomosDa) -> Self {
-        Self {
-            da
-        }
+        Self { da }
     }
 
     pub async fn process_blocks(&mut self, new_blocks: impl Iterator<Item = Block>) {
@@ -22,12 +20,11 @@ impl Processor {
             let metadata = Metadata::new([0; 32], block.number.into());
             // the node expects blobs to be padded to the next chunk size
             let remainder = blob.len() % DaEncoderParams::MAX_BLS12_381_ENCODING_CHUNK_SIZE;
-            blob.extend(
-                std::iter::repeat(0)
-                    .take(DaEncoderParams::MAX_BLS12_381_ENCODING_CHUNK_SIZE - remainder),
-            );
-            if let Err(e) = self.da.disperse(blob, metadata).await 
-            {
+            blob.extend(std::iter::repeat_n(
+                0,
+                DaEncoderParams::MAX_BLS12_381_ENCODING_CHUNK_SIZE - remainder,
+            ));
+            if let Err(e) = self.da.disperse(blob, metadata).await {
                 error!("Failed to disperse block: {e}");
             } else {
                 info!("Dispersed block: {:?}", block);
@@ -36,25 +33,22 @@ impl Processor {
     }
 }
 
-
-
 pub struct NomosDa {
     url: Url,
     client: ExecutorHttpClient,
 }
 
-
-
 impl NomosDa {
     pub fn new(basic_auth: BasicAuthCredentials, url: Url) -> Self {
         Self {
             client: ExecutorHttpClient::new(Some(basic_auth)),
             url,
         }
-    }   
+    }
 
     pub async fn disperse(&self, data: Vec<u8>, metadata: Metadata) -> Result<(), Error> {
         self.client
-            .publish_blob(self.url.clone(), data, metadata).await
+            .publish_blob(self.url.clone(), data, metadata)
+            .await
     }
-}
+}

sz-poc-offsite-2025/evm/prover/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "evm-prover"
+edition = { workspace = true }
+
+[dependencies]
+clap = { version = "4.5", features = ["derive"] }
+reqwest = { version = "0.11", features = ["blocking", "json"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }

sz-poc-offsite-2025/evm/prover/src/main.rs

@@ -0,0 +1,168 @@
+use clap::Parser;
+use reqwest::blocking::Client;
+use serde_json::{Value, json};
+use std::{path::PathBuf, process::Command, thread, time::Duration};
+use tracing::{debug, error, info};
+use tracing_subscriber::{EnvFilter, fmt};
+
+#[derive(Parser, Debug)]
+#[clap(author, version, about = "Ethereum Proof Generation Tool")]
+struct Args {
+    #[clap(long, default_value = "http://localhost:8546")]
+    rpc: String,
+
+    #[clap(long, default_value = "5")]
+    start_block: u64,
+
+    #[clap(long, default_value = "10")]
+    batch_size: u64,
+
+    #[clap(long, default_value = "5")]
+    interval: u64,
+
+    #[clap(long)]
+    zeth_binary_dir: Option<String>,
+
+    #[clap(long, default_value = "info")]
+    log_level: String,
+}
+
+fn run_ethereum_prove(
+    rpc: &str,
+    block_number: u64,
+    batch_size: u64,
+    zeth_binary_dir: Option<String>,
+    log_level: &str,
+) -> Result<(), String> {
+    info!(
+        "Running Ethereum prove for blocks {}-{}",
+        block_number,
+        block_number + batch_size - 1
+    );
+
+    let mut binary_path = if let Some(dir) = &zeth_binary_dir {
+        PathBuf::from(dir)
+    } else {
+        debug!("No binary directory provided, trying current directory");
+        std::env::current_dir().map_err(|e| format!("Failed to get current directory: {}", e))?
+    };
+
+    binary_path.push("zeth-ethereum");
+
+    if !binary_path.exists() {
+        return Err(format!("Binary not found at: {}", binary_path.display()));
+    }
+
+    let output = Command::new(&binary_path)
+        .env("RUST_LOG", log_level)
+        .args([
+            "prove",
+            &format!("--rpc={}", rpc),
+            &format!("--block-number={}", block_number),
+            &format!("--block-count={}", batch_size),
+        ])
+        .output()
+        .map_err(|e| format!("Failed to execute zeth-ethereum prove: {}", e))?;
+
+    if !output.status.success() {
+        let stderr = String::from_utf8_lossy(&output.stderr);
+        error!("ethereum prove command failed: {}", stderr);
+        return Err(format!(
+            "ethereum prove command failed with status: {}\nStderr: {}",
+            output.status, stderr
+        ));
+    }
+
+    info!("Successfully processed batch");
+    Ok(())
+}
+
+fn get_latest_block(client: &Client, rpc: &str) -> Result<u64, String> {
+    debug!("Checking latest block height...");
+
+    let request_body = json!({
+        "jsonrpc": "2.0",
+        "method": "eth_blockNumber",
+        "params": [],
+        "id": 1
+    });
+
+    let response = client
+        .post(rpc)
+        .json(&request_body)
+        .send()
+        .map_err(|e| format!("Failed to send request: {}", e))?;
+
+    if !response.status().is_success() {
+        return Err(format!("Request failed with status: {}", response.status()));
+    }
+
+    let response_json: Value = response
+        .json()
+        .map_err(|e| format!("Failed to parse response JSON: {}", e))?;
+
+    let block_hex = response_json
+        .get("result")
+        .and_then(Value::as_str)
+        .ok_or("Failed to parse response")?
+        .trim_start_matches("0x");
+
+    let block_number = u64::from_str_radix(block_hex, 16)
+        .map_err(|e| format!("Failed to parse hex block number: {}", e))?;
+
+    debug!("Latest block: {}", block_number);
+    Ok(block_number)
+}
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let args = Args::parse();
+
+    let filter =
+        EnvFilter::try_from_default_env().unwrap_or_else(|_| EnvFilter::new(&args.log_level));
+
+    fmt::fmt().with_env_filter(filter).with_target(false).init();
+
+    info!("Starting Ethereum prover...");
+
+    let client = Client::new();
+    let mut current_block = args.start_block;
+
+    loop {
+        match get_latest_block(&client, &args.rpc) {
+            Ok(latest_block) => {
+                if latest_block >= current_block + args.batch_size {
+                    info!(
+                        "New blocks available. Current: {}, Latest: {}",
+                        current_block, latest_block
+                    );
+
+                    match run_ethereum_prove(
+                        &args.rpc,
+                        current_block,
+                        args.batch_size,
+                        args.zeth_binary_dir.clone(),
+                        &args.log_level,
+                    ) {
+                        Ok(_) => {
+                            current_block += args.batch_size;
+                            info!("Updated current block to {}", current_block);
+                        }
+                        Err(e) => {
+                            error!("Error running prover: {}", e);
+                        }
+                    }
+                } else {
+                    info!(
+                        "No new blocks to process. Current: {}, Latest: {}, sleeping...",
+                        current_block, latest_block
+                    );
+                    thread::sleep(Duration::from_secs(args.interval));
+                }
+            }
+            Err(e) => {
+                error!("Error getting latest block: {}", e);
+                thread::sleep(Duration::from_secs(args.interval));
+            }
+        }
+    }
+}