Gloas: external builder API (payload bid selection and block production)

Cargo.toml

@@ -18,6 +18,7 @@ members = [
     "boot_node",
     "common/account_utils",
     "common/axum_utils",
+    "common/builder_types",
     "common/clap_utils",
     "common/deposit_contract",
     "common/directory",
@@ -76,6 +77,7 @@ members = [
     "testing/web3signer_tests",
     "validator_client",
     "validator_client/beacon_node_fallback",
+    "validator_client/builder_store",
     "validator_client/doppelganger_service",
     "validator_client/graffiti_file",
     "validator_client/http_api",
@@ -117,6 +119,9 @@ beacon_processor = { path = "beacon_node/beacon_processor" }
 bincode = "1"
 bitvec = "1"
 bls = { path = "crypto/bls" }
+builder_client = { path = "beacon_node/builder_client" }
+builder_store = { path = "validator_client/builder_store" }
+builder_types = { path = "common/builder_types" }
 byteorder = "1"
 bytes = "1.11.1"
 cargo_metadata = "0.19"

beacon_node/beacon_chain/Cargo.toml

@@ -24,6 +24,7 @@ alloy-primitives = { workspace = true }
 arbitrary = { workspace = true, optional = true }
 bitvec = { workspace = true }
 bls = { workspace = true }
+builder_client = { workspace = true }
 educe = { workspace = true }
 eth2 = { workspace = true, features = ["lighthouse", "network"] }
 eth2_network_config = { workspace = true }

beacon_node/beacon_chain/src/beacon_chain.rs

@@ -88,6 +88,7 @@ use crate::{
     CachedHead, metrics,
 };
 use bls::{PublicKey, PublicKeyBytes, Signature};
+use builder_client::Builders;
 use eth2::beacon_response::ForkVersionedResponse;
 use eth2::types::{
     EventKind, PtcDuty, SseBlobSidecar, SseBlock, SseDataColumnSidecar,
@@ -450,6 +451,9 @@ pub struct BeaconChain<T: BeaconChainTypes> {
         Mutex<ObservedOperations<SignedBlsToExecutionChange, T::EthSpec>>,
     /// Interfaces with the execution client.
     pub execution_layer: Option<ExecutionLayer<T::EthSpec>>,
+    /// Orchestrates direct builder bid requests and preference submissions over the Gloas Builder
+    /// API. Present only when the Gloas fork is scheduled.
+    pub builders: Option<Arc<Builders>>,
     /// Stores information about the canonical head and finalized/justified checkpoints of the
     /// chain. Also contains the fork choice struct, for computing the canonical head.
     pub canonical_head: CanonicalHead<T>,