diff --git a/Cargo.toml b/Cargo.toml
index 68b76a6e..4dfd7687 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -60,6 +60,7 @@ rand = { version = "0.8", features = ["std_rng", "small_rng"] }
 reqwest = { version = "0.11", default-features = false }
 rlp = "0.5"
 serde = "1.0"
+serde_with = "3.3"
 serde_bytes = "0.11"
 serde_json = "1.0"
 sha2 = "0.10"
diff --git a/src/did/Cargo.toml b/src/did/Cargo.toml
index ba25302c..a4a06dbe 100644
--- a/src/did/Cargo.toml
+++ b/src/did/Cargo.toml
@@ -30,6 +30,7 @@ num = { workspace = true }
 once_cell = { workspace = true }
 rlp = { workspace = true }
 serde = { workspace = true }
+serde_with = { workspace = true }
 serde_json = { workspace = true }
 sha2 = { workspace = true }
 sha3 = { workspace = true }
diff --git a/src/did/src/lib.rs b/src/did/src/lib.rs
index 213616d8..2e2da5ac 100644
--- a/src/did/src/lib.rs
+++ b/src/did/src/lib.rs
@@ -15,6 +15,7 @@ pub mod ic;
 pub mod init;
 pub mod integer;
 pub mod keccak;
+pub mod logs;
 pub mod mint_order_exemption;
 pub mod notify;
 pub mod permission;
diff --git a/src/did/src/logs.rs b/src/did/src/logs.rs
new file mode 100644
index 00000000..c9190132
--- /dev/null
+++ b/src/did/src/logs.rs
@@ -0,0 +1,296 @@
+use ethers_core::types::Bytes;
+use serde::{Deserialize, Serialize};
+use serde_json::Value;
+use serde_with::formats::PreferOne;
+use serde_with::{serde_as, OneOrMany};
+
+use crate::{BlockNumber, H160, H256, U256, U64};
+
+#[derive(Clone, Debug, PartialEq, Eq, Deserialize)]
+#[serde(untagged)]
+pub enum BlockFilter {
+    #[serde(rename_all = "camelCase")]
+    Exact { block_hash: H256 },
+    #[serde(rename_all = "camelCase")]
+    Bounded {
+        from_block: Option<BlockNumber>,
+        to_block: Option<BlockNumber>,
+    },
+}
+
+#[serde_as]
+#[derive(Clone, Debug, PartialEq, Eq, Deserialize)]
+#[serde(transparent)]
+pub struct LogAddressFilter(#[serde_as(deserialize_as = "OneOrMany<_, PreferOne>")] pub Vec<H160>);
+
+#[serde_as]
+#[derive(Clone, Debug, PartialEq, Eq, Deserialize)]
+#[serde(transparent)]
+pub struct LogTopicFilter(#[serde_as(deserialize_as = "OneOrMany<_, PreferOne>")] pub Vec<H256>);
+
+#[derive(Clone, Debug, PartialEq, Eq, Deserialize, Default)]
+#[serde(rename_all = "camelCase")]
+pub struct LogFilter {
+    #[serde(flatten)]
+    pub block_filter: Option<BlockFilter>,
+    pub address: Option<LogAddressFilter>,
+    pub topics: Option<Vec<Option<LogTopicFilter>>>,
+}
+
+impl TryFrom<Value> for LogFilter {
+    type Error = jsonrpc_core::Error;
+
+    fn try_from(value: Value) -> Result<Self, Self::Error> {
+        if let Value::Object(ref map) = value {
+            // According to documentation if `blockHash` property is specified then `fromBlock` and `toBlock` shouldn't be specified
+            if map.contains_key("blockHash")
+                && (map.contains_key("fromBlock") || map.contains_key("toBlock"))
+            {
+                Err(Self::Error::invalid_params(
+                    "'blockHash' property cannot be used with 'fromBlock' or 'toBlock'",
+                ))
+            } else {
+                let mut filter: LogFilter =
+                    serde_json::from_value(value).map_err(|_| Self::Error::parse_error())?;
+
+                // Empty block filter can be serialized as `block_filter: BlockFilter::Bounded(from_block: None, to_block:None)`
+                // That could be OK for us because it is equivalent to `block_filter: None`, but it's better to disambiguate things
+                if let Some(BlockFilter::Bounded {
+                    from_block: None,
+                    to_block: None,
+                }) = filter.block_filter
+                {
+                    filter.block_filter = None;
+                }
+
+                Ok(filter)
+            }
+        } else {
+            Err(Self::Error::invalid_params("invalid json value"))
+        }
+    }
+}
+
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+/// Transaction's log entry.
+pub struct TransactionLog {
+    /// Log's index within transaction.
+    pub log_index: U256,
+    /// Transaction's index within block.
+    pub transaction_index: U64,
+    /// Transaction's hash.
+    pub transaction_hash: H256,
+    /// Block's hash, transaction is included in.
+    pub block_hash: H256,
+    /// Block number, transaction is included in.
+    pub block_number: U64,
+    /// Log's address.
+    pub address: H160,
+    /// Log's data.
+    pub data: Bytes,
+    /// Log's Topics.
+    pub topics: Vec<H256>,
+}
+
+#[cfg(test)]
+mod tests {
+    use serde_json::json;
+
+    use super::*;
+
+    const BLOCK_HASH_1: &str = "f43869e67c02c57d1f9a07bb897b54bec1cfa1feb704d91a2ee087566de5df2c";
+    const TOPIC_1: &str = "cc6a069bf885d8cf2fb456ca33db48ab7d5e3df1e6504a18e7899a16d604f5c6";
+    const TOPIC_2: &str = "e4058f2da8dda0b1ffb454bb7d121c1498dcfc4446a3d86b7c03e27b34e29345";
+    const ADDRESS: &str = "7fafd954cbcfd683304cd9be0a85848cbbb1c13d";
+
+    fn get_block_hash_1_str() -> String {
+        format!("0x{BLOCK_HASH_1}")
+    }
+
+    fn get_block_hash_1() -> H256 {
+        H256::from_hex_str(BLOCK_HASH_1).unwrap()
+    }
+
+    fn get_topic_1() -> H256 {
+        H256::from_hex_str(TOPIC_1).unwrap()
+    }
+
+    fn get_topic_1_str() -> String {
+        format!("0x{TOPIC_1}")
+    }
+
+    fn get_topic_2() -> H256 {
+        H256::from_hex_str(TOPIC_2).unwrap()
+    }
+
+    fn get_topic_2_str() -> String {
+        format!("0x{TOPIC_2}")
+    }
+
+    fn get_address_str() -> String {
+        format!("0x{ADDRESS}")
+    }
+
+    fn get_address_1() -> H160 {
+        H160::from_hex_str(ADDRESS).unwrap()
+    }
+
+    #[test]
+    fn test_log_filter_deserialization_fail() {
+        assert!(LogFilter::try_from(json!([])).is_err());
+        assert!(LogFilter::try_from(json!("str")).is_err());
+        assert!(LogFilter::try_from(json!(42)).is_err());
+        assert!(LogFilter::try_from(
+            json!({"blockHash": get_block_hash_1_str(), "fromBlock": "earliest"})
+        )
+        .is_err());
+        assert!(LogFilter::try_from(
+            json!({"blockHash": get_block_hash_1_str(), "toBlock": "0x01"})
+        )
+        .is_err());
+    }
+
+    #[test]
+    fn test_log_filter_deserialization_empty() {
+        let filter = LogFilter::try_from(json!({})).unwrap();
+        let expected_filter = Default::default();
+        assert_eq!(filter, expected_filter);
+    }
+
+    #[test]
+    fn test_log_filter_deserialization_block_filter() {
+        let filter =
+            LogFilter::try_from(json!({"fromBlock": "earliest", "toBlock": "0x01"})).unwrap();
+
+        let expected_filter = LogFilter {
+            block_filter: Some(BlockFilter::Bounded {
+                from_block: Some(BlockNumber::Earliest),
+                to_block: Some(BlockNumber::Number(U64::one())),
+            }),
+            ..Default::default()
+        };
+        assert_eq!(filter, expected_filter);
+
+        let filter = LogFilter::try_from(json!({ "blockHash": get_block_hash_1_str() })).unwrap();
+        let expected_filter = LogFilter {
+            block_filter: Some(BlockFilter::Exact {
+                block_hash: get_block_hash_1(),
+            }),
+            ..Default::default()
+        };
+        assert_eq!(filter, expected_filter);
+    }
+
+    #[test]
+    fn test_log_filter_deserialization_address() {
+        let filter = LogFilter::try_from(json!({
+            "address": [],
+        }))
+        .unwrap();
+        let expected_filter = LogFilter {
+            address: Some(LogAddressFilter(vec![])),
+            ..Default::default()
+        };
+        assert_eq!(filter, expected_filter);
+
+        let filter = LogFilter::try_from(json!({
+            "address": [get_address_str()],
+        }))
+        .unwrap();
+        let expected_filter = LogFilter {
+            address: Some(LogAddressFilter(vec![get_address_1()])),
+            ..Default::default()
+        };
+        assert_eq!(filter, expected_filter);
+
+        let filter = LogFilter::try_from(json!({
+            "address": [get_address_str(), get_address_str()],
+        }))
+        .unwrap();
+        let expected_filter = LogFilter {
+            address: Some(LogAddressFilter(vec![get_address_1(), get_address_1()])),
+            ..Default::default()
+        };
+        assert_eq!(filter, expected_filter);
+    }
+
+    #[test]
+    fn test_log_filter_deserialization_topics() {
+        let filter = LogFilter::try_from(json!({
+            "topics": [],
+        }))
+        .unwrap();
+        let expected_filter = LogFilter {
+            topics: Some(vec![]),
+            ..Default::default()
+        };
+        assert_eq!(filter, expected_filter);
+
+        let filter = LogFilter::try_from(json!({
+            "topics": [null],
+        }))
+        .unwrap();
+        let expected_filter = LogFilter {
+            topics: Some(vec![None]),
+            ..Default::default()
+        };
+        assert_eq!(filter, expected_filter);
+
+        let filter = LogFilter::try_from(json!({
+            "topics": [[get_topic_1_str()]],
+        }))
+        .unwrap();
+        let expected_filter = LogFilter {
+            topics: Some(vec![Some(LogTopicFilter(vec![get_topic_1()]))]),
+            ..Default::default()
+        };
+        assert_eq!(filter, expected_filter);
+
+        let filter = LogFilter::try_from(json!({
+            "topics": [[get_topic_1_str()], null],
+        }))
+        .unwrap();
+        let expected_filter = LogFilter {
+            topics: Some(vec![Some(LogTopicFilter(vec![get_topic_1()])), None]),
+            ..Default::default()
+        };
+        assert_eq!(filter, expected_filter);
+
+        let filter = LogFilter::try_from(json!({
+            "topics": [[get_topic_1_str()], null, [get_topic_1_str(), get_topic_2_str()]],
+        }))
+        .unwrap();
+        let expected_filter = LogFilter {
+            topics: Some(vec![
+                Some(LogTopicFilter(vec![get_topic_1()])),
+                None,
+                Some(LogTopicFilter(vec![get_topic_1(), get_topic_2()])),
+            ]),
+            ..Default::default()
+        };
+        assert_eq!(filter, expected_filter);
+    }
+
+    #[test]
+    fn test_log_filter_deserialization_combine() {
+        let filter = LogFilter::try_from(json!({
+            "blockHash": get_block_hash_1_str(),
+            "address": [get_address_str()],
+            "topics": [null, [get_topic_1_str()], [get_topic_1_str(), get_topic_2_str()]],
+        }))
+        .unwrap();
+        let expected_filter = LogFilter {
+            block_filter: Some(BlockFilter::Exact {
+                block_hash: get_block_hash_1(),
+            }),
+            address: Some(LogAddressFilter(vec![get_address_1()])),
+            topics: Some(vec![
+                None,
+                Some(LogTopicFilter(vec![get_topic_1()])),
+                Some(LogTopicFilter(vec![get_topic_1(), get_topic_2()])),
+            ]),
+        };
+        assert_eq!(filter, expected_filter);
+    }
+}