diff --git a/ethers-core/src/utils/genesis.rs b/ethers-core/src/utils/genesis.rs
index a19f8354..c6885631 100644
--- a/ethers-core/src/utils/genesis.rs
+++ b/ethers-core/src/utils/genesis.rs
@@ -2,7 +2,7 @@ use std::collections::HashMap;
 
 use crate::{
     types::{Address, Bytes, H256, U256, U64},
-    utils::{from_int_or_hex, from_int_or_hex_opt},
+    utils::{from_int_or_hex, from_int_or_hex_opt, from_u64_or_hex_opt},
 };
 use serde::{Deserialize, Serialize};
 
@@ -12,15 +12,19 @@ use serde::{Deserialize, Serialize};
 #[serde(rename_all = "camelCase")]
 pub struct Genesis {
     /// The fork configuration for this network.
+    #[serde(default)]
     pub config: ChainConfig,
 
     /// The genesis header nonce.
+    #[serde(default)]
     pub nonce: U64,
 
     /// The genesis header timestamp.
+    #[serde(default)]
     pub timestamp: U64,
 
     /// The genesis header extra data.
+    #[serde(default)]
     pub extra_data: Bytes,
 
     /// The genesis header gas limit.
@@ -31,13 +35,33 @@ pub struct Genesis {
     pub difficulty: U256,
 
     /// The genesis header mix hash.
+    #[serde(default)]
     pub mix_hash: H256,
 
     /// The genesis header coinbase address.
+    #[serde(default)]
     pub coinbase: Address,
 
     /// The initial state of the genesis block.
     pub alloc: HashMap<Address, GenesisAccount>,
+
+    // The following fields are only included for tests, and should not be used in real genesis
+    // blocks.
+    /// The block number
+    #[serde(skip_serializing_if = "Option::is_none", default)]
+    pub number: Option<U64>,
+
+    /// The block gas gasUsed
+    #[serde(skip_serializing_if = "Option::is_none", default)]
+    pub gas_used: Option<U64>,
+
+    /// The block parent hash
+    #[serde(skip_serializing_if = "Option::is_none", default)]
+    pub parent_hash: Option<H256>,
+
+    /// The base fee
+    #[serde(skip_serializing_if = "Option::is_none", default)]
+    pub base_fee_per_gas: Option<U256>,
 }
 
 impl Genesis {
@@ -100,12 +124,16 @@ impl Genesis {
 /// An account in the state of the genesis block.
 #[derive(Clone, Debug, Default, PartialEq, Eq, Serialize, Deserialize)]
 pub struct GenesisAccount {
-    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(
+        skip_serializing_if = "Option::is_none",
+        deserialize_with = "from_u64_or_hex_opt",
+        default
+    )]
     pub nonce: Option<u64>,
     pub balance: U256,
-    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(skip_serializing_if = "Option::is_none", default)]
     pub code: Option<Bytes>,
-    #[serde(flatten, skip_serializing_if = "Option::is_none")]
+    #[serde(flatten, skip_serializing_if = "Option::is_none", default)]
     pub storage: Option<HashMap<H256, H256>>,
 }
 
@@ -118,6 +146,7 @@ pub struct GenesisAccount {
 #[serde(default, rename_all = "camelCase")]
 pub struct ChainConfig {
     /// The network's chain ID.
+    #[serde(default = "one")]
     pub chain_id: u64,
 
     /// The homestead switch block (None = no fork, 0 = already homestead).
@@ -191,11 +220,9 @@ pub struct ChainConfig {
     #[serde(skip_serializing_if = "Option::is_none")]
     pub shanghai_time: Option<u64>,
 
-    // TODO: change to cancunTime when <https://github.com/ethereum/go-ethereum/pull/26481> is
-    // merged in geth
-    /// Cancun hard fork block.
+    /// Cancun switch time.
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub cancun_block: Option<u64>,
+    pub cancun_time: Option<u64>,
 
     /// Total difficulty reached that triggers the merge consensus upgrade.
     #[serde(skip_serializing_if = "Option::is_none", deserialize_with = "from_int_or_hex_opt")]
@@ -214,6 +241,12 @@ pub struct ChainConfig {
     pub clique: Option<CliqueConfig>,
 }
 
+// used only for serde
+#[inline]
+const fn one() -> u64 {
+    1
+}
+
 /// Empty consensus configuration for proof-of-work networks.
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct EthashConfig {}
@@ -227,3 +260,298 @@ pub struct CliqueConfig {
     /// Epoch length to reset votes and checkpoints.
     pub epoch: u64,
 }
+
+#[cfg(test)]
+mod tests {
+    use super::{Genesis, H256};
+
+    #[test]
+    fn parse_hive_genesis() {
+        let geth_genesis = r#"
+        {
+            "difficulty": "0x20000",
+            "gasLimit": "0x1",
+            "alloc": {},
+            "config": {
+              "ethash": {},
+              "chainId": 1
+            }
+        }
+        "#;
+
+        let _genesis: Genesis = serde_json::from_str(geth_genesis).unwrap();
+    }
+
+    #[test]
+    fn parse_hive_clique_smoke_genesis() {
+        let geth_genesis = r#"
+        {
+          "difficulty": "0x1",
+          "gasLimit": "0x400000",
+          "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000658bdf435d810c91414ec09147daa6db624063790000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+          "mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+          "nonce": "0x0",
+          "timestamp": "0x5c51a607",
+          "alloc": {}
+        }
+        "#;
+
+        let _genesis: Genesis = serde_json::from_str(geth_genesis).unwrap();
+    }
+
+    #[test]
+    fn parse_hive_rpc_genesis() {
+        let geth_genesis = r#"
+        {
+          "config": {
+            "chainId": 7,
+            "homesteadBlock": 0,
+            "eip150Block": 0,
+            "eip150Hash": "0x5de1ee4135274003348e80b788e5afa4b18b18d320a5622218d5c493fedf5689",
+            "eip155Block": 0,
+            "eip158Block": 0
+          },
+          "coinbase": "0x0000000000000000000000000000000000000000",
+          "difficulty": "0x20000",
+          "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000658bdf435d810c91414ec09147daa6db624063790000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+          "gasLimit": "0x2fefd8",
+          "nonce": "0x0000000000000000",
+          "timestamp": "0x1234",
+          "alloc": {
+            "cf49fda3be353c69b41ed96333cd24302da4556f": {
+              "balance": "0x123450000000000000000"
+            },
+            "0161e041aad467a890839d5b08b138c1e6373072": {
+              "balance": "0x123450000000000000000"
+            },
+            "87da6a8c6e9eff15d703fc2773e32f6af8dbe301": {
+              "balance": "0x123450000000000000000"
+            },
+            "b97de4b8c857e4f6bc354f226dc3249aaee49209": {
+              "balance": "0x123450000000000000000"
+            },
+            "c5065c9eeebe6df2c2284d046bfc906501846c51": {
+              "balance": "0x123450000000000000000"
+            },
+            "0000000000000000000000000000000000000314": {
+              "balance": "0x0",
+              "code": "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",
+              "storage": {
+                "0x0000000000000000000000000000000000000000000000000000000000000000": "0x1234",
+                "0x6661e9d6d8b923d5bbaab1b96e1dd51ff6ea2a93520fdc9eb75d059238b8c5e9": "0x01"
+              }
+            },
+            "0000000000000000000000000000000000000315": {
+              "balance": "0x9999999999999999999999999999999",
+              "code": "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"
+            }
+          }
+        }
+        "#;
+
+        let _genesis: Genesis = serde_json::from_str(geth_genesis).unwrap();
+    }
+
+    #[test]
+    fn parse_hive_graphql_genesis() {
+        let geth_genesis = r#"
+        {
+            "config"     : {},
+            "coinbase"   : "0x8888f1f195afa192cfee860698584c030f4c9db1",
+            "difficulty" : "0x020000",
+            "extraData"  : "0x42",
+            "gasLimit"   : "0x2fefd8",
+            "mixHash"    : "0x2c85bcbce56429100b2108254bb56906257582aeafcbd682bc9af67a9f5aee46",
+            "nonce"      : "0x78cc16f7b4f65485",
+            "parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
+            "timestamp"  : "0x54c98c81",
+            "alloc"      : {
+                "a94f5374fce5edbc8e2a8697c15331677e6ebf0b": {
+                    "balance" : "0x09184e72a000"
+                }
+            }
+        }
+        "#;
+
+        let _genesis: Genesis = serde_json::from_str(geth_genesis).unwrap();
+    }
+
+    #[test]
+    fn parse_hive_engine_genesis() {
+        let geth_genesis = r#"
+        {
+          "config": {
+            "chainId": 7,
+            "homesteadBlock": 0,
+            "eip150Block": 0,
+            "eip150Hash": "0x5de1ee4135274003348e80b788e5afa4b18b18d320a5622218d5c493fedf5689",
+            "eip155Block": 0,
+            "eip158Block": 0,
+            "byzantiumBlock": 0,
+            "constantinopleBlock": 0,
+            "petersburgBlock": 0,
+            "istanbulBlock": 0,
+            "muirGlacierBlock": 0,
+            "berlinBlock": 0,
+            "yolov2Block": 0,
+            "yolov3Block": 0,
+            "londonBlock": 0
+          },
+          "coinbase": "0x0000000000000000000000000000000000000000",
+          "difficulty": "0x30000",
+          "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000658bdf435d810c91414ec09147daa6db624063790000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+          "gasLimit": "0x2fefd8",
+          "nonce": "0x0000000000000000",
+          "timestamp": "0x1234",
+          "alloc": {
+            "cf49fda3be353c69b41ed96333cd24302da4556f": {
+              "balance": "0x123450000000000000000"
+            },
+            "0161e041aad467a890839d5b08b138c1e6373072": {
+              "balance": "0x123450000000000000000"
+            },
+            "87da6a8c6e9eff15d703fc2773e32f6af8dbe301": {
+              "balance": "0x123450000000000000000"
+            },
+            "b97de4b8c857e4f6bc354f226dc3249aaee49209": {
+              "balance": "0x123450000000000000000"
+            },
+            "c5065c9eeebe6df2c2284d046bfc906501846c51": {
+              "balance": "0x123450000000000000000"
+            },
+            "0000000000000000000000000000000000000314": {
+              "balance": "0x0",
+              "code": "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",
+              "storage": {
+                "0x0000000000000000000000000000000000000000000000000000000000000000": "0x1234",
+                "0x6661e9d6d8b923d5bbaab1b96e1dd51ff6ea2a93520fdc9eb75d059238b8c5e9": "0x01"
+              }
+            },
+            "0000000000000000000000000000000000000315": {
+              "balance": "0x9999999999999999999999999999999",
+              "code": "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"
+            },
+            "0000000000000000000000000000000000000316": {
+              "balance": "0x0",
+              "code": "0x444355"
+            },
+            "0000000000000000000000000000000000000317": {
+              "balance": "0x0",
+              "code": "0x600160003555"
+            }
+          }
+        }
+        "#;
+
+        let _genesis: Genesis = serde_json::from_str(geth_genesis).unwrap();
+    }
+
+    #[test]
+    fn parse_hive_devp2p_genesis() {
+        let geth_genesis = r#"
+        {
+            "config": {
+                "chainId": 19763,
+                "homesteadBlock": 0,
+                "eip150Block": 0,
+                "eip155Block": 0,
+                "eip158Block": 0,
+                "byzantiumBlock": 0,
+                "ethash": {}
+            },
+            "nonce": "0xdeadbeefdeadbeef",
+            "timestamp": "0x0",
+            "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000",
+            "gasLimit": "0x80000000",
+            "difficulty": "0x20000",
+            "mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+            "coinbase": "0x0000000000000000000000000000000000000000",
+            "alloc": {
+                "71562b71999873db5b286df957af199ec94617f7": {
+                    "balance": "0xffffffffffffffffffffffffff"
+                }
+            },
+            "number": "0x0",
+            "gasUsed": "0x0",
+            "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
+        }
+        "#;
+
+        let _genesis: Genesis = serde_json::from_str(geth_genesis).unwrap();
+    }
+
+    #[test]
+    fn parse_execution_apis_genesis() {
+        let geth_genesis = r#"
+        {
+          "config": {
+            "chainId": 1337,
+            "homesteadBlock": 0,
+            "eip150Block": 0,
+            "eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+            "eip155Block": 0,
+            "eip158Block": 0,
+            "byzantiumBlock": 0,
+            "constantinopleBlock": 0,
+            "petersburgBlock": 0,
+            "istanbulBlock": 0,
+            "muirGlacierBlock": 0,
+            "berlinBlock": 0,
+            "londonBlock": 0,
+            "arrowGlacierBlock": 0,
+            "grayGlacierBlock": 0,
+            "shanghaiTime": 0,
+            "terminalTotalDifficulty": 0,
+            "terminalTotalDifficultyPassed": true,
+            "ethash": {}
+          },
+          "nonce": "0x0",
+          "timestamp": "0x0",
+          "extraData": "0x",
+          "gasLimit": "0x4c4b40",
+          "difficulty": "0x1",
+          "mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+          "coinbase": "0x0000000000000000000000000000000000000000",
+          "alloc": {
+            "658bdf435d810c91414ec09147daa6db62406379": {
+              "balance": "0x487a9a304539440000"
+            },
+            "aa00000000000000000000000000000000000000": {
+              "code": "0x6042",
+              "storage": {
+                "0x0000000000000000000000000000000000000000000000000000000000000000": "0x0000000000000000000000000000000000000000000000000000000000000000",
+                "0x0100000000000000000000000000000000000000000000000000000000000000": "0x0100000000000000000000000000000000000000000000000000000000000000",
+                "0x0200000000000000000000000000000000000000000000000000000000000000": "0x0200000000000000000000000000000000000000000000000000000000000000",
+                "0x0300000000000000000000000000000000000000000000000000000000000000": "0x0000000000000000000000000000000000000000000000000000000000000303"
+              },
+              "balance": "0x1",
+              "nonce": "0x1"
+            },
+            "bb00000000000000000000000000000000000000": {
+              "code": "0x600154600354",
+              "storage": {
+                "0x0000000000000000000000000000000000000000000000000000000000000000": "0x0000000000000000000000000000000000000000000000000000000000000000",
+                "0x0100000000000000000000000000000000000000000000000000000000000000": "0x0100000000000000000000000000000000000000000000000000000000000000",
+                "0x0200000000000000000000000000000000000000000000000000000000000000": "0x0200000000000000000000000000000000000000000000000000000000000000",
+                "0x0300000000000000000000000000000000000000000000000000000000000000": "0x0000000000000000000000000000000000000000000000000000000000000303"
+              },
+              "balance": "0x2",
+              "nonce": "0x1"
+            }
+          },
+          "number": "0x0",
+          "gasUsed": "0x0",
+          "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+          "baseFeePerGas": "0x3b9aca00"
+        }
+        "#;
+
+        let genesis: Genesis = serde_json::from_str(geth_genesis).unwrap();
+
+        // ensure the test fields are parsed correctly
+        assert_eq!(genesis.base_fee_per_gas, Some(1000000000.into()));
+        assert_eq!(genesis.number, Some(0.into()));
+        assert_eq!(genesis.gas_used, Some(0.into()));
+        assert_eq!(genesis.parent_hash, Some(H256::zero()));
+    }
+}
diff --git a/ethers-core/src/utils/mod.rs b/ethers-core/src/utils/mod.rs
index 9528fa01..6d29d9d0 100644
--- a/ethers-core/src/utils/mod.rs
+++ b/ethers-core/src/utils/mod.rs
@@ -36,7 +36,7 @@ pub use rlp;
 /// Re-export hex
 pub use hex;
 
-use crate::types::{Address, ParseI256Error, I256, U256};
+use crate::types::{Address, ParseI256Error, I256, U256, U64};
 use elliptic_curve::sec1::ToEncodedPoint;
 use ethabi::ethereum_types::FromDecStrErr;
 use k256::{ecdsa::SigningKey, PublicKey as K256PublicKey};
@@ -487,6 +487,25 @@ where
     }
 }
 
+/// Deserializes the input into a U64, accepting both 0x-prefixed hex and decimal strings with
+/// arbitrary precision, defined by serde_json's [`Number`](serde_json::Number).
+pub fn from_u64_or_hex<'de, D>(deserializer: D) -> Result<U64, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    #[derive(Deserialize)]
+    #[serde(untagged)]
+    enum IntOrHex {
+        Int(serde_json::Number),
+        Hex(String),
+    }
+
+    match IntOrHex::deserialize(deserializer)? {
+        IntOrHex::Hex(s) => U64::from_str(s.as_str()).map_err(serde::de::Error::custom),
+        IntOrHex::Int(n) => U64::from_dec_str(&n.to_string()).map_err(serde::de::Error::custom),
+    }
+}
+
 /// Deserializes the input into an `Option<U256>`, using [`from_int_or_hex`] to deserialize the
 /// inner value.
 pub fn from_int_or_hex_opt<'de, D>(deserializer: D) -> Result<Option<U256>, D::Error>
@@ -496,6 +515,15 @@ where
     Ok(Some(from_int_or_hex(deserializer)?))
 }
 
+/// Deserializes the input into an `Option<u64>`, using [`from_u64_or_hex`] to deserialize the
+/// inner value.
+pub fn from_u64_or_hex_opt<'de, D>(deserializer: D) -> Result<Option<u64>, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    Ok(Some(from_u64_or_hex(deserializer)?.as_u64()))
+}
+
 fn estimate_priority_fee(rewards: Vec<Vec<U256>>) -> U256 {
     let mut rewards: Vec<U256> =
         rewards.iter().map(|r| r[0]).filter(|r| *r > U256::zero()).collect();