feat(rpc-types-mev): add mev-share sse types (#1419)

* feat: add mev-share sse types

* fix: change to use pub mod instead of exporting on global

* chore: fmt

* chore: fix clippy warnings

* chore: fmt

* fix: rename sse to mevshare

crates/rpc-types-mev/src/lib.rs

@@ -12,6 +12,8 @@ pub use eth_calls::*;
 mod mev_calls;
 pub use mev_calls::*;
 
+pub mod mevshare;
+
 // types for stats endpoint like flashbots_getUserStats and flashbots_getBundleStats
 mod stats;
 pub use stats::*;

crates/rpc-types-mev/src/mevshare.rs

@@ -0,0 +1,298 @@
+//! MEV-share event type bindings
+
+use alloy_primitives::{hex, Address, Bytes, TxHash, B256, U256};
+use serde::{Deserialize, Deserializer, Serialize, Serializer};
+use std::{array::TryFromSliceError, fmt::LowerHex, ops::Deref};
+
+/// SSE event from the MEV-share endpoint
+#[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
+pub struct Event {
+    /// Transaction or bundle hash.
+    pub hash: TxHash,
+    /// Transactions from the event. If the event itself is a transaction, txs will only have one
+    /// entry. Bundle events may have more.
+    #[serde(rename = "txs", with = "null_sequence")]
+    pub transactions: Vec<EventTransaction>,
+    /// Event logs emitted by executing the transaction.
+    #[serde(with = "null_sequence")]
+    pub logs: Vec<EventTransactionLog>,
+}
+
+/// Transaction from the event
+#[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
+pub struct EventTransaction {
+    /// Transaction recipient address.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub to: Option<Address>,
+    /// 4-byte-function selector
+    #[serde(rename = "functionSelector")]
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub function_selector: Option<FunctionSelector>,
+    /// Calldata of the transaction
+    #[serde(rename = "callData")]
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub calldata: Option<Bytes>,
+}
+
+/// A log produced by a transaction.
+#[derive(Debug, Clone, Default, PartialEq, Eq, Hash, Serialize, Deserialize)]
+pub struct EventTransactionLog {
+    /// The address of the contract that emitted the log
+    pub address: Address,
+    /// Topics of the log
+    ///
+    /// (In solidity: The first topic is the hash of the signature of the event
+    /// (e.g. `Deposit(address,bytes32,uint256)`), except you declared the event
+    /// with the anonymous specifier.)
+    pub topics: Vec<B256>,
+    /// The data of the log
+    pub data: Bytes,
+}
+
+/// SSE event type of the event history endpoint.
+#[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+#[allow(missing_docs)]
+pub struct EventHistoryInfo {
+    pub count: u64,
+    pub min_block: u64,
+    pub max_block: u64,
+    pub min_timestamp: u64,
+    pub max_timestamp: u64,
+    pub max_limit: u64,
+}
+
+/// SSE event of the `history` endpoint
+#[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct EventHistory {
+    /// The block number of the event's block.
+    pub block: u64,
+    /// The timestamp when the event was emitted.
+    pub timestamp: u64,
+    /// Hint for the historic block.
+    pub hint: Hint,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+#[allow(missing_docs)]
+pub struct Hint {
+    #[serde(with = "null_sequence")]
+    pub txs: Vec<EventTransaction>,
+    pub hash: B256,
+    #[serde(with = "null_sequence")]
+    pub logs: Vec<EventTransactionLog>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub gas_used: Option<U256>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub mev_gas_price: Option<U256>,
+}
+
+/// Query params for the `history` endpoint
+#[derive(Default, Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
+#[serde(default, rename_all = "camelCase")]
+#[allow(missing_docs)]
+pub struct EventHistoryParams {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub block_start: Option<u64>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub block_end: Option<u64>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub timestamp_start: Option<u64>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub timestamp_end: Option<u64>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub limit: Option<u64>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub offset: Option<u64>,
+}
+
+#[allow(missing_docs)]
+impl EventHistoryParams {
+    pub const fn with_block_start(mut self, block_start: u64) -> Self {
+        self.block_start = Some(block_start);
+        self
+    }
+
+    pub const fn with_block_end(mut self, block_end: u64) -> Self {
+        self.block_end = Some(block_end);
+        self
+    }
+
+    pub const fn with_block_range(mut self, block_start: u64, block_end: u64) -> Self {
+        self.block_start = Some(block_start);
+        self.block_end = Some(block_end);
+        self
+    }
+
+    pub const fn with_timestamp_start(mut self, timestamp_start: u64) -> Self {
+        self.timestamp_start = Some(timestamp_start);
+        self
+    }
+
+    pub const fn with_timestamp_end(mut self, timestamp_end: u64) -> Self {
+        self.timestamp_end = Some(timestamp_end);
+        self
+    }
+
+    pub const fn with_timestamp_range(mut self, timestamp_start: u64, timestamp_end: u64) -> Self {
+        self.timestamp_start = Some(timestamp_start);
+        self.timestamp_end = Some(timestamp_end);
+        self
+    }
+
+    pub const fn with_limit(mut self, limit: u64) -> Self {
+        self.limit = Some(limit);
+        self
+    }
+
+    pub const fn with_offset(mut self, offset: u64) -> Self {
+        self.offset = Some(offset);
+        self
+    }
+}
+
+/// 4-byte-function selector
+#[derive(Clone, PartialEq, Eq, Hash)]
+pub struct FunctionSelector(pub [u8; 4]);
+
+// === impl FunctionSelector ===
+
+impl FunctionSelector {
+    fn hex_encode(&self) -> String {
+        hex::encode(self.0.as_ref())
+    }
+}
+
+impl Serialize for FunctionSelector {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_str(self.to_string().as_str())
+    }
+}
+
+impl<'de> Deserialize<'de> for FunctionSelector {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        let hex_str = String::deserialize(deserializer)?;
+        let s = hex_str.strip_prefix("0x").unwrap_or(&hex_str);
+        if s.len() != 8 {
+            return Err(serde::de::Error::custom(format!(
+                "Expected 4 byte function selector: {}",
+                hex_str
+            )));
+        }
+
+        let bytes = hex::decode(s).map_err(serde::de::Error::custom)?;
+        let selector = Self::try_from(bytes.as_slice()).map_err(serde::de::Error::custom)?;
+        Ok(selector)
+    }
+}
+
+impl AsRef<[u8]> for FunctionSelector {
+    fn as_ref(&self) -> &[u8] {
+        self.0.as_ref()
+    }
+}
+
+impl std::fmt::Debug for FunctionSelector {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_tuple("FunctionSelector").field(&self.hex_encode()).finish()
+    }
+}
+
+impl std::fmt::Display for FunctionSelector {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "0x{}", self.hex_encode())
+    }
+}
+
+impl LowerHex for FunctionSelector {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "0x{}", self.hex_encode())
+    }
+}
+
+impl Deref for FunctionSelector {
+    type Target = [u8];
+
+    #[inline]
+    fn deref(&self) -> &[u8] {
+        self.as_ref()
+    }
+}
+
+impl From<[u8; 4]> for FunctionSelector {
+    fn from(src: [u8; 4]) -> Self {
+        Self(src)
+    }
+}
+
+impl<'a> TryFrom<&'a [u8]> for FunctionSelector {
+    type Error = TryFromSliceError;
+
+    fn try_from(value: &'a [u8]) -> Result<Self, Self::Error> {
+        let sel: [u8; 4] = value.try_into()?;
+        Ok(Self(sel))
+    }
+}
+
+impl PartialEq<[u8; 4]> for FunctionSelector {
+    fn eq(&self, other: &[u8; 4]) -> bool {
+        other == &self.0
+    }
+}
+
+/// Deserializes missing or null sequences as empty vectors.
+mod null_sequence {
+    use serde::{de::DeserializeOwned, Deserialize, Deserializer, Serialize, Serializer};
+
+    pub(crate) fn deserialize<'de, D, T>(deserializer: D) -> Result<Vec<T>, D::Error>
+    where
+        D: Deserializer<'de>,
+        T: DeserializeOwned,
+    {
+        let s = Option::<Vec<T>>::deserialize(deserializer)?.unwrap_or_default();
+        Ok(s)
+    }
+
+    pub(crate) fn serialize<T, S>(val: &Vec<T>, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        T: Serialize,
+        S: Serializer,
+    {
+        if val.is_empty() {
+            serializer.serialize_none()
+        } else {
+            val.serialize(serializer)
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_null_txs() {
+        let s = "{\"hash\":\"0x9d525cbf4ed0cd367df93a685da93da036bf5c6d0d6e9e31945779ddbca31d3b\",\"logs\":[{\"address\":\"0x074201cb10b1efedbd8dec271c37687e1ab5be4e\",\"data\":\"0x\",\"topics\":[\"0xd78ad95fa46c994b6551d0da85fc275fe613ce37657fb8d5e3d130840159d822\",\"0x0000000000000000000000000000000000000000000000000000000000000000\",\"0x0000000000000000000000000000000000000000000000000000000000000000\"]},{\"address\":\"0x0d4a11d5eeaac28ec3f61d100daf4d40471f1852\",\"data\":\"0x\",\"topics\":[\"0xd78ad95fa46c994b6551d0da85fc275fe613ce37657fb8d5e3d130840159d822\",\"0x0000000000000000000000000000000000000000000000000000000000000000\",\"0x0000000000000000000000000000000000000000000000000000000000000000\"]}],\"txs\":null}";
+        let _ev: Event = serde_json::from_str(s).unwrap();
+    }
+
+    #[test]
+    fn test_null_logs() {
+        let s = "{\"hash\":\"0x8e32bfed609925168302ea538acd839ad34fdcd5d89dff67b19f9717d39abee6\",\"logs\":null,\"txs\":null}";
+        let _ev: Event = serde_json::from_str(s).unwrap();
+    }
+
+    #[test]
+    fn test_sample() {
+        let s = r#"{"hash":"0xc7dc06c994400830054ab815732d91275bc1241f9be62b62b687b7882f19b8d4","logs":null,"txs":[{"to":"0x0000c335bc9d5d1af0402cad63fa7f258363d71a","functionSelector":"0x696d2073","callData":"0x696d20736861726969696969696e67"}]}"#;
+        let _ev: Event = serde_json::from_str(s).unwrap();
+    }
+}