feat(alloy-consensus): EIP4844 tx support (#185)

* feat(consensus): eip4844 scaffold

* chore: use alloy_eips for constants

* chore: tests, add arbitrary extensions for 4844

crates/consensus/src/lib.rs

@@ -24,6 +24,6 @@ mod receipt;
 pub use receipt::{Receipt, ReceiptEnvelope, ReceiptWithBloom};
 
 mod transaction;
-pub use transaction::{TxEip1559, TxEip2930, TxEnvelope, TxLegacy, TxType};
+pub use transaction::{TxEip1559, TxEip2930, TxEip4844, TxEnvelope, TxLegacy, TxType};
 
 pub use alloy_network::TxKind;

crates/consensus/src/receipt/envelope.rs

@@ -26,6 +26,10 @@ pub enum ReceiptEnvelope {
     ///
     /// [EIP-1559]: https://eips.ethereum.org/EIPS/eip-1559
     Eip1559(ReceiptWithBloom),
+    /// Receipt envelope with type flag 2, containing a [EIP-4844] receipt.
+    ///
+    /// [EIP-4844]: https://eips.ethereum.org/EIPS/eip-4844
+    Eip4844(ReceiptWithBloom),
 }
 
 impl ReceiptEnvelope {
@@ -35,26 +39,31 @@ impl ReceiptEnvelope {
             Self::Legacy(_) | Self::TaggedLegacy(_) => TxType::Legacy,
             Self::Eip2930(_) => TxType::Eip2930,
             Self::Eip1559(_) => TxType::Eip1559,
+            Self::Eip4844(_) => TxType::Eip4844,
         }
     }
 
     /// Return the inner receipt with bloom. Currently this is infallible,
     /// however, future receipt types may be added.
     pub const fn as_receipt_with_bloom(&self) -> Option<&ReceiptWithBloom> {
         match self {
-            Self::Legacy(t) | Self::TaggedLegacy(t) | Self::Eip2930(t) | Self::Eip1559(t) => {
-                Some(t)
-            }
+            Self::Legacy(t)
+            | Self::TaggedLegacy(t)
+            | Self::Eip2930(t)
+            | Self::Eip1559(t)
+            | Self::Eip4844(t) => Some(t),
         }
     }
 
     /// Return the inner receipt. Currently this is infallible, however, future
     /// receipt types may be added.
     pub const fn as_receipt(&self) -> Option<&Receipt> {
         match self {
-            Self::Legacy(t) | Self::TaggedLegacy(t) | Self::Eip2930(t) | Self::Eip1559(t) => {
-                Some(&t.receipt)
-            }
+            Self::Legacy(t)
+            | Self::TaggedLegacy(t)
+            | Self::Eip2930(t)
+            | Self::Eip1559(t)
+            | Self::Eip4844(t) => Some(&t.receipt),
         }
     }
 
@@ -104,6 +113,7 @@ impl Encodable2718 for ReceiptEnvelope {
             Self::TaggedLegacy(_) => Some(TxType::Legacy as u8),
             Self::Eip2930(_) => Some(TxType::Eip2930 as u8),
             Self::Eip1559(_) => Some(TxType::Eip1559 as u8),
+            Self::Eip4844(_) => Some(TxType::Eip4844 as u8),
         }
     }
 
@@ -127,6 +137,7 @@ impl Decodable2718 for ReceiptEnvelope {
             TxType::Legacy => Ok(Self::TaggedLegacy(receipt)),
             TxType::Eip2930 => Ok(Self::Eip2930(receipt)),
             TxType::Eip1559 => Ok(Self::Eip1559(receipt)),
+            TxType::Eip4844 => Ok(Self::Eip4844(receipt)),
         }
     }