feat: add BlockConditional

crates/consensus/src/transaction/meta.rs

@@ -2,6 +2,18 @@
 
 use alloy_primitives::{BlockHash, TxHash, B256};
 
+/// Contains attributes of a block that are relevant for block conditional transactions.
+///
+/// These attributes are used to determine preconditions for inclusion in the block with the given
+/// attributes (EIP-4337 transactions)
+#[derive(Debug, Clone, Copy, Default, Eq, PartialEq)]
+pub struct BlockConditionalAttributes {
+    /// The number of the block.
+    pub number: u64,
+    /// The block's timestamp
+    pub timestamp: u64,
+}
+
 /// Additional fields in the context of a block that contains this _mined_ transaction.
 ///
 /// This contains mandatory block fields (block hash, number, timestamp, index).