커스텀 백엔드

let chain_provider = ...;
let l2_chain_provider = ...;
let blob_provider = ...;
let l1_origin = ...;

let cfg = Arc::new(RollupConfig::default());
let l1_cfg = Arc::new(L1ChainConfig::default());
let attributes = StatefulAttributesBuilder::new(
   cfg.clone(),
   l1_cfg,
   l2_chain_provider.clone(),
   chain_provider.clone(),
   None, // interop dependency set; required when interop is scheduled
);
let dap = EthereumDataSource::new_from_parts(
   chain_provider.clone(),
   blob_provider,
   cfg.as_ref()
);

// Construct a new derivation pipeline.
let pipeline = PipelineBuilder::new()
   .rollup_config(cfg)
   .dap_source(dap)
   .l2_chain_provider(l2_chain_provider)
   .chain_provider(chain_provider)
   .builder(attributes)
   .origin(l1_origin)
   .build_polled();

let cfg = RollupConfig::default();
let provider = ...;
let hinter = ...;
let evm_factory = ...;       // e.g. an alloy-evm EvmFactory implementation
let receipt_builder = ...;   // OP Stack callers pass OpAlloyReceiptBuilder
let parent_header = ...;     // Sealed<Header> of the parent block

let mut executor = StatelessL2Builder::new(
   &cfg,
   evm_factory,
   receipt_builder,
   provider,
   hinter,
   parent_header,
);

let outcome = executor.build_block(...).expect("Failed execution");