From 3cd2e6e2df761750b78214ce15940f056dc66973 Mon Sep 17 00:00:00 2001
From: 0xPenryn <ian@world.org>
Date: Sat, 22 Nov 2025 16:30:18 -0300
Subject: [PATCH] feat: pull from scr github

---
 Cargo.lock                                    |  2 ++
 crates/optimism/chainspec/Cargo.toml          | 10 +++++-
 .../chainspec/src/superchain/configs.rs       | 32 ++++++++++++++++++-
 crates/optimism/cli/Cargo.toml                |  4 +--
 4 files changed, 44 insertions(+), 4 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 448e638b649..1d5a87980e4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -9364,6 +9364,7 @@ dependencies = [
  "op-alloy-consensus",
  "op-alloy-rpc-types",
  "paste",
+ "reqwest",
  "reth-chainspec",
  "reth-ethereum-forks",
  "reth-network-peers",
@@ -9374,6 +9375,7 @@ dependencies = [
  "serde_json",
  "tar-no-std",
  "thiserror 2.0.17",
+ "toml",
 ]
 
 [[package]]
diff --git a/crates/optimism/chainspec/Cargo.toml b/crates/optimism/chainspec/Cargo.toml
index a4ef9263b1c..108ec9bcf6d 100644
--- a/crates/optimism/chainspec/Cargo.toml
+++ b/crates/optimism/chainspec/Cargo.toml
@@ -45,6 +45,8 @@ derive_more.workspace = true
 paste = { workspace = true, optional = true }
 thiserror = { workspace = true, optional = true }
 op-alloy-consensus.workspace = true
+reqwest = { workspace = true, features = ["rustls-tls-native-roots", "blocking"], optional = true }
+toml = { workspace = true, optional = true }
 
 [dev-dependencies]
 reth-chainspec = { workspace = true, features = ["test-utils"] }
@@ -52,7 +54,13 @@ alloy-op-hardforks.workspace = true
 
 [features]
 default = ["std"]
-superchain-configs = ["miniz_oxide", "paste", "tar-no-std", "thiserror", "thiserror", "dep:serde"]
+superchain-configs = ["miniz_oxide", "paste", "tar-no-std", "thiserror", "dep:serde"]
+pull-superchain-configs = [
+    "std",
+    "superchain-configs",
+    "dep:reqwest",
+    "dep:toml",
+]
 std = [
     "alloy-chains/std",
     "alloy-genesis/std",
diff --git a/crates/optimism/chainspec/src/superchain/configs.rs b/crates/optimism/chainspec/src/superchain/configs.rs
index bb1929646a0..daa9dc6a1dc 100644
--- a/crates/optimism/chainspec/src/superchain/configs.rs
+++ b/crates/optimism/chainspec/src/superchain/configs.rs
@@ -7,6 +7,11 @@ use alloc::{
 use alloy_genesis::Genesis;
 use miniz_oxide::inflate::decompress_to_vec_zlib_with_limit;
 use tar_no_std::{CorruptDataError, TarArchiveRef};
+#[cfg(feature = "pull-superchain-configs")]
+use {
+    reqwest::blocking::Client,
+    std::time::Duration,
+};
 
 /// A genesis file can be up to 100MiB. This is a reasonable limit for the genesis file size.
 const MAX_GENESIS_SIZE: usize = 100 * 1024 * 1024; // 100MiB
@@ -58,19 +63,44 @@ pub(crate) fn read_superchain_genesis(
     Ok(genesis)
 }
 
-/// Reads the [`ChainMetadata`] from the superchain config tar file for a superchain.
+/// Reads the [`ChainMetadata`] for a superchain from the superchain registry github, falling back to the local config tar file.
 /// For example, `read_superchain_config("unichain", "mainnet")`.
 fn read_superchain_metadata(
     name: &str,
     environment: &str,
     archive: &TarArchiveRef<'_>,
 ) -> Result<ChainMetadata, SuperchainConfigError> {
+    #[cfg(feature = "pull-superchain-configs")]
+    if let Some(remote_config) = fetch_superchain_registry_metadata(name, environment) {
+        return Ok(remote_config)
+    }
+
     let config_file = read_file(archive, &format!("configs/{environment}/{name}.json"))?;
     let config_content = String::from_utf8(config_file)?;
     let chain_config: ChainMetadata = serde_json::from_str(&config_content)?;
     Ok(chain_config)
 }
 
+#[cfg(feature = "pull-superchain-configs")]
+fn fetch_superchain_registry_metadata(
+    name: &str,
+    environment: &str,
+) -> Option<ChainMetadata> {
+    const URL: &str =
+        "https://raw.githubusercontent.com/ethereum-optimism/superchain-registry/main/superchain/configs";
+    const TIMEOUT: Duration = Duration::from_secs(5);
+
+    let client = Client::builder().timeout(TIMEOUT).build().ok()?;
+    let url = format!("{URL}/{environment}/{name}.toml");
+    let response = client.get(&url).send().ok()?;
+    if !response.status().is_success() {
+        return None
+    }
+    let body = response.text().ok()?;
+    let config: ChainMetadata = toml::from_str(&body).ok()?;
+    Some(config)
+}
+
 /// Reads a file from the tar archive. The file path is relative to the root of the tar archive.
 fn read_file(
     archive: &TarArchiveRef<'_>,
diff --git a/crates/optimism/cli/Cargo.toml b/crates/optimism/cli/Cargo.toml
index bdb680b2062..eb77ac3044f 100644
--- a/crates/optimism/cli/Cargo.toml
+++ b/crates/optimism/cli/Cargo.toml
@@ -35,7 +35,7 @@ reth-node-metrics.workspace = true
 
 ## optimism
 reth-optimism-primitives.workspace = true
-reth-optimism-chainspec = { workspace = true, features = ["superchain-configs"] }
+reth-optimism-chainspec = { workspace = true, features = ["pull-superchain-configs"] }
 reth-optimism-consensus.workspace = true
 
 reth-chainspec.workspace = true
@@ -71,7 +71,7 @@ tempfile.workspace = true
 reth-stages = { workspace = true, features = ["test-utils"] }
 
 [build-dependencies]
-reth-optimism-chainspec = { workspace = true, features = ["std", "superchain-configs"] }
+reth-optimism-chainspec = { workspace = true, features = ["std", "pull-superchain-configs"] }
 
 [features]
 default = []