Lib.rs

op-alloy-registry

op-alloy-registry is a no_std crate that exports rust type definitions for chains in the superchain-registry. Since it reads static files to read configurations for various chains into instantiated objects, the op-alloy-registry crate requires serde as a dependency. To use the op-alloy-registry crate, add the crate as a dependency to a Cargo.toml.

op-alloy-registry = "0.6.7"

op-alloy-registry declares lazy evaluated statics that expose ChainConfigs, RollupConfigs, and Chain objects for all chains with static definitions in the superchain registry. The way this works is the the golang side of the superchain registry contains an "internal code generation" script that has been modified to output configuration files to the crates/registry directory in the etc folder that are read by the op-alloy-registry rust crate. These static config files contain an up-to-date list of all superchain configurations with their chain configs.

There are three core statics exposed by the op-alloy-registry.

• CHAINS: A list of chain objects containing the superchain metadata for this chain.
• OPCHAINS: A map from chain id to ChainConfig.
• ROLLUP_CONFIGS: A map from chain id to RollupConfig.

While the op-alloy-genesis crate contains a few hardcoded RollupConfig objects, the op-alloy-registry exports the complete list of superchains and their chain's RollupConfigs and ChainConfigs.

Usage

Add the following to your Cargo.toml.

[dependencies]
op-alloy-registry = "0.6.7"

To make op-alloy-registry no_std, toggle default-features off like so.

[dependencies]
op-alloy-registry = { version = "0.6.7", default-features = false }

Below demonstrates getting the RollupConfig for OP Mainnet (Chain ID 10).

use op_alloy_registry::ROLLUP_CONFIGS;

let op_chain_id = 10;
let op_rollup_config = ROLLUP_CONFIGS.get(&op_chain_id);
println!("OP Mainnet Rollup Config: {:?}", op_rollup_config);

A mapping from chain id to ChainConfig is also available.

use op_alloy_registry::OPCHAINS;

let op_chain_id = 10;
let op_chain_config = OPCHAINS.get(&op_chain_id);
println!("OP Mainnet Chain Config: {:?}", op_chain_config);

Feature Flags

• std: Uses the standard library to pull in environment variables.

Credits

superchain-registry contributors for building and maintaining superchain types.

alloy and op-alloy for creating and maintaining high quality Ethereum and Optimism types in rust.