diff --git a/ethers-core/src/types/chain.rs b/ethers-core/src/types/chain.rs
index fd23c83b..24df078f 100644
--- a/ethers-core/src/types/chain.rs
+++ b/ethers-core/src/types/chain.rs
@@ -140,6 +140,8 @@ pub enum Chain {
     CantoTestnet = 740,
 
     Boba = 288,
+
+    ZKSync = 324,
 }
 
 // === impl Chain ===
@@ -270,9 +272,9 @@ impl Chain {
             FilecoinHyperspaceTestnet | FilecoinMainnet => 30_000,
 
             // Explicitly exhaustive. See NB above.
-            Morden | Ropsten | Rinkeby | Goerli | Kovan | XDai | Chiado | Sepolia | Moonbase |
-            MoonbeamDev | Optimism | OptimismGoerli | OptimismKovan | Poa | Sokol | Rsk |
-            EmeraldTestnet | Boba => return None,
+            Morden | Ropsten | Rinkeby | Goerli | Kovan | XDai | Chiado | Sepolia | Moonbase
+            | MoonbeamDev | Optimism | OptimismGoerli | OptimismKovan | Poa | Sokol | Rsk
+            | EmeraldTestnet | Boba | ZKSync => return None,
         };
 
         Some(Duration::from_millis(ms))
@@ -293,41 +295,42 @@ impl Chain {
 
         match self {
             // Known legacy chains / non EIP-1559 compliant
-            Optimism |
-            OptimismGoerli |
-            OptimismKovan |
-            Fantom |
-            FantomTestnet |
-            BinanceSmartChain |
-            BinanceSmartChainTestnet |
-            Arbitrum |
-            ArbitrumTestnet |
-            ArbitrumGoerli |
-            ArbitrumNova |
-            Rsk |
-            Oasis |
-            Emerald |
-            EmeraldTestnet |
-            Celo |
-            CeloAlfajores |
-            CeloBaklava |
-            Boba => true,
+            Optimism
+            | OptimismGoerli
+            | OptimismKovan
+            | Fantom
+            | FantomTestnet
+            | BinanceSmartChain
+            | BinanceSmartChainTestnet
+            | Arbitrum
+            | ArbitrumTestnet
+            | ArbitrumGoerli
+            | ArbitrumNova
+            | Rsk
+            | Oasis
+            | Emerald
+            | EmeraldTestnet
+            | Celo
+            | CeloAlfajores
+            | CeloBaklava
+            | Boba
+            | ZKSync => true,
 
             // Known EIP-1559 chains
-            Mainnet |
-            Goerli |
-            Sepolia |
-            Polygon |
-            PolygonMumbai |
-            Avalanche |
-            AvalancheFuji |
-            FilecoinHyperspaceTestnet => false,
+            Mainnet
+            | Goerli
+            | Sepolia
+            | Polygon
+            | PolygonMumbai
+            | Avalanche
+            | AvalancheFuji
+            | FilecoinHyperspaceTestnet => false,
 
             // Unknown / not applicable, default to false for backwards compatibility
-            Dev | AnvilHardhat | Morden | Ropsten | Rinkeby | Cronos | CronosTestnet | Kovan |
-            Sokol | Poa | XDai | Moonbeam | MoonbeamDev | Moonriver | Moonbase | Evmos |
-            EvmosTestnet | Chiado | Aurora | AuroraTestnet | Canto | CantoTestnet |
-            FilecoinMainnet => false,
+            Dev | AnvilHardhat | Morden | Ropsten | Rinkeby | Cronos | CronosTestnet | Kovan
+            | Sokol | Poa | XDai | Moonbeam | MoonbeamDev | Moonriver | Moonbase | Evmos
+            | EvmosTestnet | Chiado | Aurora | AuroraTestnet | Canto | CantoTestnet
+            | FilecoinMainnet => false,
         }
     }
 
@@ -460,10 +463,14 @@ impl Chain {
 
             Boba => ("https://api.bobascan.com/api", "https://bobascan.com"),
 
+            ZKSync => {
+                ("https://zksync2-mainnet-explorer.zksync.io/", "https://explorer.zksync.io/")
+            }
+
             AnvilHardhat | Dev | Morden | MoonbeamDev | FilecoinMainnet => {
                 // this is explicitly exhaustive so we don't forget to add new urls when adding a
                 // new chain
-                return None
+                return None;
             }
         };
 
@@ -484,28 +491,28 @@ impl Chain {
         use Chain::*;
 
         let api_key_name = match self {
-            Mainnet |
-            Morden |
-            Ropsten |
-            Kovan |
-            Rinkeby |
-            Goerli |
-            Optimism |
-            OptimismGoerli |
-            OptimismKovan |
-            BinanceSmartChain |
-            BinanceSmartChainTestnet |
-            Arbitrum |
-            ArbitrumTestnet |
-            ArbitrumGoerli |
-            ArbitrumNova |
-            Cronos |
-            CronosTestnet |
-            Aurora |
-            AuroraTestnet |
-            Celo |
-            CeloAlfajores |
-            CeloBaklava => "ETHERSCAN_API_KEY",
+            Mainnet
+            | Morden
+            | Ropsten
+            | Kovan
+            | Rinkeby
+            | Goerli
+            | Optimism
+            | OptimismGoerli
+            | OptimismKovan
+            | BinanceSmartChain
+            | BinanceSmartChainTestnet
+            | Arbitrum
+            | ArbitrumTestnet
+            | ArbitrumGoerli
+            | ArbitrumNova
+            | Cronos
+            | CronosTestnet
+            | Aurora
+            | AuroraTestnet
+            | Celo
+            | CeloAlfajores
+            | CeloBaklava => "ETHERSCAN_API_KEY",
 
             Avalanche | AvalancheFuji => "SNOWTRACE_API_KEY",
 
@@ -520,21 +527,22 @@ impl Chain {
             Boba => "BOBASCAN_API_KEY",
 
             // Explicitly exhaustive. See NB above.
-            XDai |
-            Chiado |
-            Sepolia |
-            Rsk |
-            Sokol |
-            Poa |
-            Oasis |
-            Emerald |
-            EmeraldTestnet |
-            Evmos |
-            EvmosTestnet |
-            AnvilHardhat |
-            Dev |
-            FilecoinMainnet |
-            FilecoinHyperspaceTestnet => return None,
+            XDai
+            | Chiado
+            | Sepolia
+            | Rsk
+            | Sokol
+            | Poa
+            | Oasis
+            | Emerald
+            | EmeraldTestnet
+            | Evmos
+            | EvmosTestnet
+            | AnvilHardhat
+            | Dev
+            | FilecoinMainnet
+            | FilecoinHyperspaceTestnet
+            | ZKSync => return None,
         };
 
         Some(api_key_name)