diff --git a/contract_manager/src/core/chains.ts b/contract_manager/src/core/chains.ts
index 1d4a26c577..5dafa7c2d7 100644
--- a/contract_manager/src/core/chains.ts
+++ b/contract_manager/src/core/chains.ts
@@ -263,6 +263,9 @@ export class CosmWasmChain extends Chain {
       gasPrice: this.gasPrice,
       id: this.id,
       mainnet: this.mainnet,
+      ...(this.nativeToken !== undefined && {
+        nativeToken: this.nativeToken,
+      }),
       prefix: this.prefix,
       type: CosmWasmChain.type,
       wormholeChainName: this.wormholeChainName,
@@ -441,6 +444,9 @@ export class SuiChain extends Chain {
       endpointType: this.endpointType,
       id: this.id,
       mainnet: this.mainnet,
+      ...(this.nativeToken !== undefined && {
+        nativeToken: this.nativeToken,
+      }),
       rpcUrl: this.rpcUrl,
       type: SuiChain.type,
       wormholeChainName: this.wormholeChainName,
@@ -936,6 +942,9 @@ export class IotaChain extends Chain {
       endpointType: this.endpointType,
       id: this.id,
       mainnet: this.mainnet,
+      ...(this.nativeToken !== undefined && {
+        nativeToken: this.nativeToken,
+      }),
       rpcUrl: this.rpcUrl,
       type: IotaChain.type,
       wormholeChainName: this.wormholeChainName,
@@ -1013,6 +1022,9 @@ export class SvmChain extends Chain {
     return {
       id: this.id,
       mainnet: this.mainnet,
+      ...(this.nativeToken !== undefined && {
+        nativeToken: this.nativeToken,
+      }),
       rpcUrl: this.rpcUrl,
       type: SvmChain.type,
       wormholeChainName: this.wormholeChainName,
@@ -1131,6 +1143,9 @@ export class EvmChain extends Chain {
     return {
       id: this.id,
       mainnet: this.mainnet,
+      ...(this.nativeToken !== undefined && {
+        nativeToken: this.nativeToken,
+      }),
       networkId: this.networkId,
       rpcUrl: this.rpcUrl,
       type: EvmChain.type,
@@ -1311,6 +1326,9 @@ export class AptosChain extends Chain {
     return {
       id: this.id,
       mainnet: this.mainnet,
+      ...(this.nativeToken !== undefined && {
+        nativeToken: this.nativeToken,
+      }),
       rpcUrl: this.rpcUrl,
       type: AptosChain.type,
       wormholeChainName: this.wormholeChainName,
@@ -1402,6 +1420,9 @@ export class FuelChain extends Chain {
       gqlUrl: this.gqlUrl,
       id: this.id,
       mainnet: this.mainnet,
+      ...(this.nativeToken !== undefined && {
+        nativeToken: this.nativeToken,
+      }),
       type: FuelChain.type,
       wormholeChainName: this.wormholeChainName,
     };
@@ -1519,6 +1540,7 @@ export class TonChain extends Chain {
     wormholeChainName: string,
     nativeToken: TokenId | undefined,
     private rpcUrl: string,
+    private networkId: string,
   ) {
     super(id, mainnet, wormholeChainName, nativeToken);
   }
@@ -1583,6 +1605,10 @@ export class TonChain extends Chain {
     return {
       id: this.id,
       mainnet: this.mainnet,
+      ...(this.nativeToken !== undefined && {
+        nativeToken: this.nativeToken,
+      }),
+      networkId: this.networkId,
       rpcUrl: this.rpcUrl,
       type: TonChain.type,
       wormholeChainName: this.wormholeChainName,
@@ -1597,6 +1623,7 @@ export class TonChain extends Chain {
       parsed.wormholeChainName ?? "",
       parsed.nativeToken,
       parsed.rpcUrl ?? "",
+      parsed.networkId ?? "",
     );
   }
 
@@ -1647,6 +1674,9 @@ export class NearChain extends Chain {
     return {
       id: this.id,
       mainnet: this.mainnet,
+      ...(this.nativeToken !== undefined && {
+        nativeToken: this.nativeToken,
+      }),
       networkId: this.networkId,
       rpcUrl: this.rpcUrl,
       type: NearChain.type,
diff --git a/contract_manager/tests/chains.test.ts b/contract_manager/tests/chains.test.ts
new file mode 100644
index 0000000000..cf0480927c
--- /dev/null
+++ b/contract_manager/tests/chains.test.ts
@@ -0,0 +1,153 @@
+import { describe, expect, it } from "vitest";
+import {
+  AptosChain,
+  CosmWasmChain,
+  EvmChain,
+  FuelChain,
+  IotaChain,
+  NearChain,
+  SuiChain,
+  SvmChain,
+  TonChain,
+} from "../src/core/chains";
+
+type ChainFactory = {
+  fromJson: (parsed: Record<string, unknown>) => {
+    getNativeToken: () => string | undefined;
+    toJson: () => Record<string, unknown>;
+  };
+};
+
+describe("Chain Serialization Contract Symmetry", () => {
+  const chainTestCases = [
+    {
+      cls: CosmWasmChain,
+      name: "CosmWasmChain",
+      sample: {
+        endpoint: "http://localhost",
+        feeDenom: "uosmo",
+        gasPrice: "0.025",
+        id: "osmosis",
+        mainnet: true,
+        nativeToken: "OSMO",
+        prefix: "osmo",
+        type: CosmWasmChain.type,
+        wormholeChainName: "osmosis",
+      },
+    },
+    {
+      cls: SuiChain,
+      name: "SuiChain",
+      sample: {
+        endpointType: "json-rpc",
+        id: "sui",
+        mainnet: true,
+        nativeToken: "SUI",
+        rpcUrl: "http://localhost",
+        type: SuiChain.type,
+        wormholeChainName: "sui",
+      },
+    },
+    {
+      cls: IotaChain,
+      name: "IotaChain",
+      sample: {
+        endpointType: "json-rpc",
+        id: "iota",
+        mainnet: true,
+        nativeToken: "IOTA",
+        rpcUrl: "http://localhost",
+        type: IotaChain.type,
+        wormholeChainName: "iota",
+      },
+    },
+    {
+      cls: SvmChain,
+      name: "SvmChain",
+      sample: {
+        id: "solana",
+        mainnet: true,
+        nativeToken: "SOL",
+        rpcUrl: "http://localhost",
+        type: SvmChain.type,
+        wormholeChainName: "solana",
+      },
+    },
+    {
+      cls: EvmChain,
+      name: "EvmChain",
+      sample: {
+        id: "ethereum",
+        mainnet: true,
+        nativeToken: "ETH",
+        networkId: 1,
+        rpcUrl: "http://localhost",
+        type: EvmChain.type,
+      },
+    },
+    {
+      cls: AptosChain,
+      name: "AptosChain",
+      sample: {
+        id: "aptos",
+        mainnet: true,
+        nativeToken: "APT",
+        rpcUrl: "http://localhost",
+        type: AptosChain.type,
+        wormholeChainName: "aptos",
+      },
+    },
+    {
+      cls: FuelChain,
+      name: "FuelChain",
+      sample: {
+        gqlUrl: "http://localhost",
+        id: "fuel",
+        mainnet: true,
+        nativeToken: "ETH",
+        type: FuelChain.type,
+        wormholeChainName: "fuel_mainnet",
+      },
+    },
+    {
+      cls: TonChain,
+      name: "TonChain",
+      sample: {
+        id: "ton",
+        mainnet: true,
+        nativeToken: "TON",
+        networkId: "0x1",
+        rpcUrl: "http://localhost",
+        type: TonChain.type,
+        wormholeChainName: "ton_mainnet",
+      },
+    },
+    {
+      cls: NearChain,
+      name: "NearChain",
+      sample: {
+        id: "near",
+        mainnet: true,
+        nativeToken: "NEAR",
+        networkId: "mainnet",
+        rpcUrl: "http://localhost",
+        type: NearChain.type,
+        wormholeChainName: "near",
+      },
+    },
+  ];
+
+  for (const { name, cls, sample } of chainTestCases) {
+    it(`should preserve nativeToken in ${name} through fromJson -> toJson -> fromJson`, () => {
+      const factory = cls as unknown as ChainFactory;
+      const chain = factory.fromJson(sample);
+      expect(chain.getNativeToken()).toEqual(sample.nativeToken);
+
+      const json = chain.toJson();
+      expect(json.nativeToken).toEqual(sample.nativeToken);
+
+      const roundTripChain = factory.fromJson(json);
+      expect(roundTripChain.getNativeToken()).toEqual(sample.nativeToken);
+    });
+  }
+});