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kona-registry is a no_std crate that exports rust type definitions for chains in the superchain-registry. These are lazily evaluated statics that provide ChainConfigs, RollupConfigs, and Chain objects for all chains with static definitions in the superchain-registry. Since it reads static files to read configurations for various chains into instantiated objects, the kona-registry crate requires serde as a dependency. There are three core statics exposed by the kona-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.
kona-registry exports the complete list of chains within the superchain, as well as each chain’s RollupConfigs and ChainConfigs.

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Usage

Add the following to your Cargo.toml. 
[dependencies]
kona-registry = "0.1.0"
To make kona-registry no_std, toggle default-features off like so. 
[dependencies]
kona-registry = { version = "0.1.0", default-features = false }
Below demonstrates getting the RollupConfig for OP Mainnet (Chain ID 10). 
use kona_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 kona_registry::OPCHAINS;

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