diff --git a/doc/index.html b/doc/index.html
index 46567d2..2cff6d9 100755
--- a/doc/index.html
+++ b/doc/index.html
@@ -3967,11 +3967,12 @@
   }
 };
     defs["solidity_service.SolidityAPIService.SimulateTransactionBody"] = {
-  "required" : [ "chainSpec", "simulation" ],
+  "required" : [ "simulation" ],
   "type" : "object",
   "properties" : {
     "chainSpec" : {
-      "$ref" : "#/components/schemas/solidity_service_SolidityAPIService_SimulateTransactionBody_chainSpec"
+      "type" : "object",
+      "properties" : { }
     },
     "simulation" : {
       "$ref" : "#/components/schemas/solidity_service.Simulation"
@@ -3998,21 +3999,14 @@
       }
     }
   }
-};
-    defs["solidity_service_SolidityAPIService_SimulateTransactionBody_chainSpec"] = {
-  "type" : "object",
-  "properties" : {
-    "forkId" : {
-      "type" : "string"
-    }
-  }
 };
     defs["solidity_service.SolidityAPIService.SimulateTransactionBundleBody"] = {
-  "required" : [ "chainSpec", "simulations" ],
+  "required" : [ "simulations" ],
   "type" : "object",
   "properties" : {
     "chainSpec" : {
-      "$ref" : "#/components/schemas/solidity_service_SolidityAPIService_SimulateTransactionBody_chainSpec"
+      "type" : "object",
+      "properties" : { }
     },
     "simulations" : {
       "type" : "array",
@@ -4046,11 +4040,12 @@
   }
 };
     defs["solidity_service.SolidityAPIService.SimulateTransactionBundleByForkBody"] = {
-  "required" : [ "chainSpec", "simulations" ],
+  "required" : [ "simulations" ],
   "type" : "object",
   "properties" : {
     "chainSpec" : {
-      "$ref" : "#/components/schemas/solidity_service_SolidityAPIService_SimulateTransactionBundleByForkBody_chainSpec"
+      "type" : "object",
+      "properties" : { }
     },
     "simulations" : {
       "type" : "array",
@@ -4082,21 +4077,14 @@
       "value" : "0xbe32c0faed7400"
     } ]
   }
-};
-    defs["solidity_service_SolidityAPIService_SimulateTransactionBundleByForkBody_chainSpec"] = {
-  "type" : "object",
-  "properties" : {
-    "chainId" : {
-      "type" : "string"
-    }
-  }
 };
     defs["solidity_service.SolidityAPIService.SimulateTransactionByForkBody"] = {
-  "required" : [ "chainSpec", "simulation" ],
+  "required" : [ "simulation" ],
   "type" : "object",
   "properties" : {
     "chainSpec" : {
-      "$ref" : "#/components/schemas/solidity_service_SolidityAPIService_SimulateTransactionBundleByForkBody_chainSpec"
+      "type" : "object",
+      "properties" : { }
     },
     "simulation" : {
       "$ref" : "#/components/schemas/solidity_service.Simulation"
diff --git a/openapi.json b/openapi.json
index 6fb907c..6f6b5f8 100644
--- a/openapi.json
+++ b/openapi.json
@@ -5524,19 +5524,13 @@
       },
       "properties": {
         "chainSpec": {
-          "type": "object",
-          "properties": {
-            "forkId": {
-              "type": "string"
-            }
-          }
+          "type": "object"
         },
         "simulation": {
           "$ref": "#/definitions/solidity_service.Simulation"
         }
       },
       "required": [
-        "chainSpec",
         "simulation"
       ]
     },
@@ -5569,12 +5563,7 @@
       },
       "properties": {
         "chainSpec": {
-          "type": "object",
-          "properties": {
-            "forkId": {
-              "type": "string"
-            }
-          }
+          "type": "object"
         },
         "simulations": {
           "type": "array",
@@ -5586,7 +5575,6 @@
         }
       },
       "required": [
-        "chainSpec",
         "simulations"
       ]
     },
@@ -5619,12 +5607,7 @@
       },
       "properties": {
         "chainSpec": {
-          "type": "object",
-          "properties": {
-            "chainId": {
-              "type": "string"
-            }
-          }
+          "type": "object"
         },
         "simulations": {
           "type": "array",
@@ -5636,7 +5619,6 @@
         }
       },
       "required": [
-        "chainSpec",
         "simulations"
       ]
     },
@@ -5665,19 +5647,13 @@
       },
       "properties": {
         "chainSpec": {
-          "type": "object",
-          "properties": {
-            "chainId": {
-              "type": "string"
-            }
-          }
+          "type": "object"
         },
         "simulation": {
           "$ref": "#/definitions/solidity_service.Simulation"
         }
       },
       "required": [
-        "chainSpec",
         "simulation"
       ]
     },
diff --git a/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBody.ts b/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBody.ts
index 4a02260..dca3813 100755
--- a/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBody.ts
+++ b/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBody.ts
@@ -13,13 +13,6 @@
  */
 
 import { mapValues } from '../runtime.js';
-import type { SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec } from './SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec.js';
-import {
-    SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecFromJSON,
-    SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecFromJSONTyped,
-    SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecToJSON,
-    SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecToJSONTyped,
-} from './SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec.js';
 import type { SolidityServiceSimulation } from './SolidityServiceSimulation.js';
 import {
     SolidityServiceSimulationFromJSON,
@@ -36,10 +29,10 @@ import {
 export interface SolidityServiceSolidityAPIServiceSimulateTransactionBody {
     /**
      * 
-     * @type {SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec}
+     * @type {object}
      * @memberof SolidityServiceSolidityAPIServiceSimulateTransactionBody
      */
-    chainSpec: SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec;
+    chainSpec?: object;
     /**
      * 
      * @type {SolidityServiceSimulation}
@@ -52,7 +45,6 @@ export interface SolidityServiceSolidityAPIServiceSimulateTransactionBody {
  * Check if a given object implements the SolidityServiceSolidityAPIServiceSimulateTransactionBody interface.
  */
 export function instanceOfSolidityServiceSolidityAPIServiceSimulateTransactionBody(value: object): value is SolidityServiceSolidityAPIServiceSimulateTransactionBody {
-    if (!('chainSpec' in value) || value['chainSpec'] === undefined) return false;
     if (!('simulation' in value) || value['simulation'] === undefined) return false;
     return true;
 }
@@ -67,7 +59,7 @@ export function SolidityServiceSolidityAPIServiceSimulateTransactionBodyFromJSON
     }
     return {
         
-        'chainSpec': SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecFromJSON(json['chainSpec']),
+        'chainSpec': json['chainSpec'] == null ? undefined : json['chainSpec'],
         'simulation': SolidityServiceSimulationFromJSON(json['simulation']),
     };
 }
@@ -83,7 +75,7 @@ export function SolidityServiceSolidityAPIServiceSimulateTransactionBodyFromJSON
 
     return {
         
-        'chainSpec': SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecToJSON(value['chainSpec']),
+        'chainSpec': value['chainSpec'],
         'simulation': SolidityServiceSimulationToJSON(value['simulation']),
     };
 }
diff --git a/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec.ts b/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec.ts
deleted file mode 100755
index 1abc842..0000000
--- a/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec.ts
+++ /dev/null
@@ -1,65 +0,0 @@
-/* tslint:disable */
-/* eslint-disable */
-/**
- * Sentio API
- * Sentio Open API for query data
- *
- * The version of the OpenAPI document: version not set
- * 
- *
- * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
- * https://openapi-generator.tech
- * Do not edit the class manually.
- */
-
-import { mapValues } from '../runtime.js';
-/**
- * 
- * @export
- * @interface SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec
- */
-export interface SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec {
-    /**
-     * 
-     * @type {string}
-     * @memberof SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec
-     */
-    forkId?: string;
-}
-
-/**
- * Check if a given object implements the SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec interface.
- */
-export function instanceOfSolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec(value: object): value is SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec {
-    return true;
-}
-
-export function SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecFromJSON(json: any): SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec {
-    return SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecFromJSONTyped(json, false);
-}
-
-export function SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecFromJSONTyped(json: any, ignoreDiscriminator: boolean): SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec {
-    if (json == null) {
-        return json;
-    }
-    return {
-        
-        'forkId': json['forkId'] == null ? undefined : json['forkId'],
-    };
-}
-
-  export function SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecToJSON(json: any): SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec {
-      return SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecToJSONTyped(json, false);
-  }
-
-  export function SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecToJSONTyped(value?: SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec | null, ignoreDiscriminator: boolean = false): any {
-    if (value == null) {
-        return value;
-    }
-
-    return {
-        
-        'forkId': value['forkId'],
-    };
-}
-
diff --git a/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBundleBody.ts b/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBundleBody.ts
index 9635035..86c6f02 100755
--- a/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBundleBody.ts
+++ b/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBundleBody.ts
@@ -13,13 +13,6 @@
  */
 
 import { mapValues } from '../runtime.js';
-import type { SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec } from './SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec.js';
-import {
-    SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecFromJSON,
-    SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecFromJSONTyped,
-    SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecToJSON,
-    SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecToJSONTyped,
-} from './SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec.js';
 import type { SolidityServiceSimulation } from './SolidityServiceSimulation.js';
 import {
     SolidityServiceSimulationFromJSON,
@@ -36,10 +29,10 @@ import {
 export interface SolidityServiceSolidityAPIServiceSimulateTransactionBundleBody {
     /**
      * 
-     * @type {SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec}
+     * @type {object}
      * @memberof SolidityServiceSolidityAPIServiceSimulateTransactionBundleBody
      */
-    chainSpec: SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec;
+    chainSpec?: object;
     /**
      * For blockNumber, transactionIndex, networkId, stateOverrides and blockOverrides fields, only the first simulation takes effect.
      * @type {Array<SolidityServiceSimulation>}
@@ -52,7 +45,6 @@ export interface SolidityServiceSolidityAPIServiceSimulateTransactionBundleBody
  * Check if a given object implements the SolidityServiceSolidityAPIServiceSimulateTransactionBundleBody interface.
  */
 export function instanceOfSolidityServiceSolidityAPIServiceSimulateTransactionBundleBody(value: object): value is SolidityServiceSolidityAPIServiceSimulateTransactionBundleBody {
-    if (!('chainSpec' in value) || value['chainSpec'] === undefined) return false;
     if (!('simulations' in value) || value['simulations'] === undefined) return false;
     return true;
 }
@@ -67,7 +59,7 @@ export function SolidityServiceSolidityAPIServiceSimulateTransactionBundleBodyFr
     }
     return {
         
-        'chainSpec': SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecFromJSON(json['chainSpec']),
+        'chainSpec': json['chainSpec'] == null ? undefined : json['chainSpec'],
         'simulations': ((json['simulations'] as Array<any>).map(SolidityServiceSimulationFromJSON)),
     };
 }
@@ -83,7 +75,7 @@ export function SolidityServiceSolidityAPIServiceSimulateTransactionBundleBodyFr
 
     return {
         
-        'chainSpec': SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpecToJSON(value['chainSpec']),
+        'chainSpec': value['chainSpec'],
         'simulations': ((value['simulations'] as Array<any>).map(SolidityServiceSimulationToJSON)),
     };
 }
diff --git a/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBody.ts b/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBody.ts
index bdd176b..3a14cb8 100755
--- a/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBody.ts
+++ b/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBody.ts
@@ -20,13 +20,6 @@ import {
     SolidityServiceSimulationToJSON,
     SolidityServiceSimulationToJSONTyped,
 } from './SolidityServiceSimulation.js';
-import type { SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec } from './SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec.js';
-import {
-    SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecFromJSON,
-    SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecFromJSONTyped,
-    SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecToJSON,
-    SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecToJSONTyped,
-} from './SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec.js';
 
 /**
  * 
@@ -36,10 +29,10 @@ import {
 export interface SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBody {
     /**
      * 
-     * @type {SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec}
+     * @type {object}
      * @memberof SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBody
      */
-    chainSpec: SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec;
+    chainSpec?: object;
     /**
      * For blockNumber, transactionIndex, networkId, stateOverrides and blockOverrides fields, only the first simulation takes effect.
      * @type {Array<SolidityServiceSimulation>}
@@ -52,7 +45,6 @@ export interface SolidityServiceSolidityAPIServiceSimulateTransactionBundleByFor
  * Check if a given object implements the SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBody interface.
  */
 export function instanceOfSolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBody(value: object): value is SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBody {
-    if (!('chainSpec' in value) || value['chainSpec'] === undefined) return false;
     if (!('simulations' in value) || value['simulations'] === undefined) return false;
     return true;
 }
@@ -67,7 +59,7 @@ export function SolidityServiceSolidityAPIServiceSimulateTransactionBundleByFork
     }
     return {
         
-        'chainSpec': SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecFromJSON(json['chainSpec']),
+        'chainSpec': json['chainSpec'] == null ? undefined : json['chainSpec'],
         'simulations': ((json['simulations'] as Array<any>).map(SolidityServiceSimulationFromJSON)),
     };
 }
@@ -83,7 +75,7 @@ export function SolidityServiceSolidityAPIServiceSimulateTransactionBundleByFork
 
     return {
         
-        'chainSpec': SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecToJSON(value['chainSpec']),
+        'chainSpec': value['chainSpec'],
         'simulations': ((value['simulations'] as Array<any>).map(SolidityServiceSimulationToJSON)),
     };
 }
diff --git a/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec.ts b/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec.ts
deleted file mode 100755
index ad9a85b..0000000
--- a/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec.ts
+++ /dev/null
@@ -1,65 +0,0 @@
-/* tslint:disable */
-/* eslint-disable */
-/**
- * Sentio API
- * Sentio Open API for query data
- *
- * The version of the OpenAPI document: version not set
- * 
- *
- * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
- * https://openapi-generator.tech
- * Do not edit the class manually.
- */
-
-import { mapValues } from '../runtime.js';
-/**
- * 
- * @export
- * @interface SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec
- */
-export interface SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec {
-    /**
-     * 
-     * @type {string}
-     * @memberof SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec
-     */
-    chainId?: string;
-}
-
-/**
- * Check if a given object implements the SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec interface.
- */
-export function instanceOfSolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec(value: object): value is SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec {
-    return true;
-}
-
-export function SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecFromJSON(json: any): SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec {
-    return SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecFromJSONTyped(json, false);
-}
-
-export function SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecFromJSONTyped(json: any, ignoreDiscriminator: boolean): SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec {
-    if (json == null) {
-        return json;
-    }
-    return {
-        
-        'chainId': json['chainId'] == null ? undefined : json['chainId'],
-    };
-}
-
-  export function SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecToJSON(json: any): SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec {
-      return SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecToJSONTyped(json, false);
-  }
-
-  export function SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecToJSONTyped(value?: SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec | null, ignoreDiscriminator: boolean = false): any {
-    if (value == null) {
-        return value;
-    }
-
-    return {
-        
-        'chainId': value['chainId'],
-    };
-}
-
diff --git a/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionByForkBody.ts b/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionByForkBody.ts
index 4c24f91..1f06840 100755
--- a/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionByForkBody.ts
+++ b/src/models/SolidityServiceSolidityAPIServiceSimulateTransactionByForkBody.ts
@@ -20,13 +20,6 @@ import {
     SolidityServiceSimulationToJSON,
     SolidityServiceSimulationToJSONTyped,
 } from './SolidityServiceSimulation.js';
-import type { SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec } from './SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec.js';
-import {
-    SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecFromJSON,
-    SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecFromJSONTyped,
-    SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecToJSON,
-    SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecToJSONTyped,
-} from './SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec.js';
 
 /**
  * 
@@ -36,10 +29,10 @@ import {
 export interface SolidityServiceSolidityAPIServiceSimulateTransactionByForkBody {
     /**
      * 
-     * @type {SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec}
+     * @type {object}
      * @memberof SolidityServiceSolidityAPIServiceSimulateTransactionByForkBody
      */
-    chainSpec: SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec;
+    chainSpec?: object;
     /**
      * 
      * @type {SolidityServiceSimulation}
@@ -52,7 +45,6 @@ export interface SolidityServiceSolidityAPIServiceSimulateTransactionByForkBody
  * Check if a given object implements the SolidityServiceSolidityAPIServiceSimulateTransactionByForkBody interface.
  */
 export function instanceOfSolidityServiceSolidityAPIServiceSimulateTransactionByForkBody(value: object): value is SolidityServiceSolidityAPIServiceSimulateTransactionByForkBody {
-    if (!('chainSpec' in value) || value['chainSpec'] === undefined) return false;
     if (!('simulation' in value) || value['simulation'] === undefined) return false;
     return true;
 }
@@ -67,7 +59,7 @@ export function SolidityServiceSolidityAPIServiceSimulateTransactionByForkBodyFr
     }
     return {
         
-        'chainSpec': SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecFromJSON(json['chainSpec']),
+        'chainSpec': json['chainSpec'] == null ? undefined : json['chainSpec'],
         'simulation': SolidityServiceSimulationFromJSON(json['simulation']),
     };
 }
@@ -83,7 +75,7 @@ export function SolidityServiceSolidityAPIServiceSimulateTransactionByForkBodyFr
 
     return {
         
-        'chainSpec': SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpecToJSON(value['chainSpec']),
+        'chainSpec': value['chainSpec'],
         'simulation': SolidityServiceSimulationToJSON(value['simulation']),
     };
 }
diff --git a/src/models/index.ts b/src/models/index.ts
index 63dec8a..347c76a 100755
--- a/src/models/index.ts
+++ b/src/models/index.ts
@@ -172,10 +172,8 @@ export * from './SolidityServiceSimulateTransactionResponse.js';
 export * from './SolidityServiceSimulation.js';
 export * from './SolidityServiceSimulationResult.js';
 export * from './SolidityServiceSolidityAPIServiceSimulateTransactionBody.js';
-export * from './SolidityServiceSolidityAPIServiceSimulateTransactionBodyChainSpec.js';
 export * from './SolidityServiceSolidityAPIServiceSimulateTransactionBundleBody.js';
 export * from './SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBody.js';
-export * from './SolidityServiceSolidityAPIServiceSimulateTransactionBundleByForkBodyChainSpec.js';
 export * from './SolidityServiceSolidityAPIServiceSimulateTransactionByForkBody.js';
 export * from './SolidityServiceSourceFetcherType.js';
 export * from './SolidityServiceSourceInfo.js';