Add SSZ types, content negotiation, and encoding helpers

Cargo.toml

@@ -49,9 +49,11 @@ ethereum_ssz_derive = "0.10"
 eyre = "0.6.12"
 futures = "0.3.30"
 headers = "0.4.0"
+headers-accept = "0.2.1"
 indexmap = "2.2.6"
 jsonwebtoken = { version = "9.3.1", default-features = false }
 lazy_static = "1.5.0"
+mediatype = "0.20.0"
 lh_eth2 = { package = "eth2", git = "https://github.com/sigp/lighthouse", tag = "v8.1.3", features = ["events"] }
 lh_eth2_keystore = { package = "eth2_keystore", git = "https://github.com/sigp/lighthouse", tag = "v8.1.3" }
 lh_bls = { package = "bls", git = "https://github.com/sigp/lighthouse", tag = "v8.1.3" }

crates/common/Cargo.toml

@@ -26,12 +26,14 @@ ethereum_ssz.workspace = true
 ethereum_ssz_derive.workspace = true
 eyre.workspace = true
 futures.workspace = true
+headers-accept.workspace = true
 jsonwebtoken.workspace = true
 lazy_static.workspace = true
 lh_bls.workspace = true
 lh_eth2.workspace = true
 lh_eth2_keystore.workspace = true
 lh_types.workspace = true
+mediatype.workspace = true
 notify.workspace = true
 pbkdf2.workspace = true
 rand.workspace = true

crates/common/src/pbs/error.rs

@@ -14,6 +14,9 @@ pub enum PbsError {
     #[error("json decode error: {err:?}, raw: {raw}")]
     JsonDecode { err: serde_json::Error, raw: String },
 
+    #[error("error with request: {0}")]
+    GeneralRequest(String),
+
     #[error("{0}")]
     ReadResponse(#[from] ResponseReadError),
 
@@ -107,3 +110,25 @@ pub enum ValidationError {
     #[error("unsupported fork")]
     UnsupportedFork,
 }
+
+#[derive(Debug, Error, PartialEq, Eq)]
+pub enum SszValueError {
+    #[error("invalid payload length: required {required} but payload was {actual}")]
+    InvalidPayloadLength { required: usize, actual: usize },
+
+    #[error("unsupported fork")]
+    UnsupportedFork { name: String },
+}
+
+impl From<SszValueError> for PbsError {
+    fn from(err: SszValueError) -> Self {
+        match err {
+            SszValueError::InvalidPayloadLength { required, actual } => PbsError::GeneralRequest(
+                format!("invalid payload length: required {required} but payload was {actual}"),
+            ),
+            SszValueError::UnsupportedFork { name } => {
+                PbsError::GeneralRequest(format!("unsupported fork: {name}"))
+            }
+        }
+    }
+}

crates/common/src/pbs/mod.rs

@@ -6,5 +6,6 @@ mod types;
 
 pub use builder::*;
 pub use constants::*;
+pub use lh_types::ForkVersionDecode;
 pub use relay::*;
 pub use types::*;

crates/common/src/pbs/types/mod.rs

@@ -1,5 +1,5 @@
 use alloy::primitives::{B256, U256, b256};
-use lh_eth2::ForkVersionedResponse;
+pub use lh_eth2::ForkVersionedResponse;
 pub use lh_types::ForkName;
 use lh_types::{BlindedPayload, ExecPayload, MainnetEthSpec};
 use serde::{Deserialize, Serialize};
@@ -26,6 +26,10 @@ pub type PayloadAndBlobs = lh_eth2::types::ExecutionPayloadAndBlobs<MainnetEthSp
 pub type SubmitBlindedBlockResponse = ForkVersionedResponse<PayloadAndBlobs>;
 
 pub type ExecutionPayloadHeader = lh_types::ExecutionPayloadHeader<MainnetEthSpec>;
+pub type ExecutionPayloadHeaderBellatrix =
+    lh_types::ExecutionPayloadHeaderBellatrix<MainnetEthSpec>;
+pub type ExecutionPayloadHeaderCapella = lh_types::ExecutionPayloadHeaderCapella<MainnetEthSpec>;
+pub type ExecutionPayloadHeaderDeneb = lh_types::ExecutionPayloadHeaderDeneb<MainnetEthSpec>;
 pub type ExecutionPayloadHeaderElectra = lh_types::ExecutionPayloadHeaderElectra<MainnetEthSpec>;
 pub type ExecutionPayloadHeaderFulu = lh_types::ExecutionPayloadHeaderFulu<MainnetEthSpec>;
 pub type ExecutionPayloadHeaderRef<'a> = lh_types::ExecutionPayloadHeaderRef<'a, MainnetEthSpec>;
@@ -34,14 +38,20 @@ pub type ExecutionPayloadElectra = lh_types::ExecutionPayloadElectra<MainnetEthS
 pub type ExecutionPayloadFulu = lh_types::ExecutionPayloadFulu<MainnetEthSpec>;
 pub type SignedBuilderBid = lh_types::SignedBuilderBid<MainnetEthSpec>;
 pub type BuilderBid = lh_types::BuilderBid<MainnetEthSpec>;
+pub type BuilderBidBellatrix = lh_types::BuilderBidBellatrix<MainnetEthSpec>;
+pub type BuilderBidCapella = lh_types::BuilderBidCapella<MainnetEthSpec>;
+pub type BuilderBidDeneb = lh_types::BuilderBidDeneb<MainnetEthSpec>;
 pub type BuilderBidElectra = lh_types::BuilderBidElectra<MainnetEthSpec>;
+pub type BuilderBidFulu = lh_types::BuilderBidFulu<MainnetEthSpec>;
 
 /// Response object of GET
 /// `/eth/v1/builder/header/{slot}/{parent_hash}/{pubkey}`
 pub type GetHeaderResponse = ForkVersionedResponse<SignedBuilderBid>;
 
 pub type KzgCommitments = lh_types::KzgCommitments<MainnetEthSpec>;
 
+pub type Uint256 = lh_types::Uint256;
+
 /// Response params of GET
 /// `/eth/v1/builder/header/{slot}/{parent_hash}/{pubkey}`
 #[derive(Debug, Serialize, Deserialize, Clone)]