# sui_devInspectTransactionBlock > For the complete documentation index, see [llms.txt](/docs/llms.txt). POST https://sui-mainnet.g.alchemy.com/v2/{apiKey} Runs a transaction in dev-inspect mode. This allows testing nearly any transaction with any arguments. Detailed results are provided, including execution effects and return values. Note: gas is not charged, but usage is calculated. Reference: https://www.alchemy.com/docs/chains/sui/sui-api-endpoints/sui-dev-inspect-transaction-block ## Parameters | Name | Type | Required | Description | |------|------|----------|-------------| | sender_address | string | Yes | The address that initiates the dev inspect transaction. | | tx_bytes | string | Yes | Base64-encoded BCS transaction kind (excluding gas info). | | gas_price | string | Yes | Simulated gas price to be used during dev inspect (gas is not deducted). | | epoch | string | Yes | The epoch context in which to perform the inspection. | ## Result **result** (object): Simulated transaction inspection result. ## Example ### Request ```json { "jsonrpc": "2.0", "method": "sui_devInspectTransactionBlock", "params": [ "0x8d59ac375d6bea13560d6ddcf33a3d6f45fa9f5b1be6819974242480b678711a", "AAPDdSGd1K6HApnQ1UMmEIOXvtBFDAEFAAAAAAAAADDat41YRxp4SW63HCxud7omjwOQOg6huYDqcvdFeE95OGaVEnTPlWWtjAYAAAAAACBCRYDRhl1WPPDl5P0n7fK6uWgf", "10", "1" ], "id": 1 } ``` ### Response ```json { "jsonrpc": "2.0", "result": { "effects": { "messageVersion": "v1", "status": { "status": "success" }, "executedEpoch": "0", "gasUsed": { "computationCost": "100", "storageCost": "100", "storageRebate": "10", "nonRefundableStorageFee": "0" }, "transactionDigest": "76gyHCk7FRrGACRqXM7Ybj5uJLtAzgEMJ5P9CeEzxZSG", "mutated": [ { "owner": { "AddressOwner": "0x2f5c543d716ae43d453deb3b199bbdaf1bc7030c7682f87703dce431248fede0" }, "reference": { "objectId": "0x2c43805d0d6f5402a7ad0da5bdec549c7cdea06bc4a1d339a22521eea933b889", "version": 2, "digest": "BhbWpBeESxuRWvmvLMyb2JNUuFa6j4aG1T4WUiPgKAHm" } }, { "owner": { "AddressOwner": "0x67c6d31c6c970e567f03ef67d811a4f843665b8de3f282fa48b3e0103ba9bbed" }, "reference": { "objectId": "0x6a06153b9fc486e101f0e9e2703ac8666d06aecc4ddf7e7926a361970c65a5b1", "version": 2, "digest": "GdfET1avZReDftpJNB8LSuHJ2cKUheSbEaLMzuPVXHsM" } } ], "gasObject": { "owner": { "ObjectOwner": "0x2f5c543d716ae43d453deb3b199bbdaf1bc7030c7682f87703dce431248fede0" }, "reference": { "objectId": "0x2c43805d0d6f5402a7ad0da5bdec549c7cdea06bc4a1d339a22521eea933b889", "version": 2, "digest": "BhbWpBeESxuRWvmvLMyb2JNUuFa6j4aG1T4WUiPgKAHm" } }, "eventsDigest": "6kerMphN4S5QTfd9TAhwMiFq1q9c2YwfpheBfWm85vUq" }, "events": [] }, "id": 1 } ``` ## Code Examples ### cURL ```bash curl --request POST \ --url https://sui-mainnet.g.alchemy.com/v2/docs-demo \ --header 'Content-Type: application/json' \ --data '{ "jsonrpc": "2.0", "id": 1, "method": "sui_devInspectTransactionBlock", "params": [ "0x8d59ac375d6bea13560d6ddcf33a3d6f45fa9f5b1be6819974242480b678711a", "AAPDdSGd1K6HApnQ1UMmEIOXvtBFDAEFAAAAAAAAADDat41YRxp4SW63HCxud7omjwOQOg6huYDqcvdFeE95OGaVEnTPlWWtjAYAAAAAACBCRYDRhl1WPPDl5P0n7fK6uWgf", "10", "1" ] }' ``` ### JavaScript ```javascript const options = { method: 'POST', headers: {'Content-Type': 'application/json'}, body: JSON.stringify({ jsonrpc: '2.0', id: 1, method: 'sui_devInspectTransactionBlock', params: [ '0x8d59ac375d6bea13560d6ddcf33a3d6f45fa9f5b1be6819974242480b678711a', 'AAPDdSGd1K6HApnQ1UMmEIOXvtBFDAEFAAAAAAAAADDat41YRxp4SW63HCxud7omjwOQOg6huYDqcvdFeE95OGaVEnTPlWWtjAYAAAAAACBCRYDRhl1WPPDl5P0n7fK6uWgf', '10', '1' ] }) }; fetch('https://sui-mainnet.g.alchemy.com/v2/docs-demo', options) .then(res => res.json()) .then(res => console.log(res)) .catch(err => console.error(err)); ``` ### Python ```python import requests url = "https://sui-mainnet.g.alchemy.com/v2/docs-demo" payload = { "jsonrpc": "2.0", "id": 1, "method": "sui_devInspectTransactionBlock", "params": ["0x8d59ac375d6bea13560d6ddcf33a3d6f45fa9f5b1be6819974242480b678711a", "AAPDdSGd1K6HApnQ1UMmEIOXvtBFDAEFAAAAAAAAADDat41YRxp4SW63HCxud7omjwOQOg6huYDqcvdFeE95OGaVEnTPlWWtjAYAAAAAACBCRYDRhl1WPPDl5P0n7fK6uWgf", "10", "1"] } headers = {"Content-Type": "application/json"} response = requests.post(url, json=payload, headers=headers) print(response.text) ``` ### Go ```go package main import ( "fmt" "strings" "net/http" "io" ) func main() { url := "https://sui-mainnet.g.alchemy.com/v2/docs-demo" payload := strings.NewReader("{\n \"jsonrpc\": \"2.0\",\n \"id\": 1,\n \"method\": \"sui_devInspectTransactionBlock\",\n \"params\": [\n \"0x8d59ac375d6bea13560d6ddcf33a3d6f45fa9f5b1be6819974242480b678711a\",\n \"AAPDdSGd1K6HApnQ1UMmEIOXvtBFDAEFAAAAAAAAADDat41YRxp4SW63HCxud7omjwOQOg6huYDqcvdFeE95OGaVEnTPlWWtjAYAAAAAACBCRYDRhl1WPPDl5P0n7fK6uWgf\",\n \"10\",\n \"1\"\n ]\n}") req, _ := http.NewRequest("POST", url, payload) req.Header.Add("Content-Type", "application/json") res, _ := http.DefaultClient.Do(req) defer res.Body.Close() body, _ := io.ReadAll(res.Body) fmt.Println(string(body)) } ``` ### Java ```java HttpResponse response = Unirest.post("https://sui-mainnet.g.alchemy.com/v2/docs-demo") .header("Content-Type", "application/json") .body("{\n \"jsonrpc\": \"2.0\",\n \"id\": 1,\n \"method\": \"sui_devInspectTransactionBlock\",\n \"params\": [\n \"0x8d59ac375d6bea13560d6ddcf33a3d6f45fa9f5b1be6819974242480b678711a\",\n \"AAPDdSGd1K6HApnQ1UMmEIOXvtBFDAEFAAAAAAAAADDat41YRxp4SW63HCxud7omjwOQOg6huYDqcvdFeE95OGaVEnTPlWWtjAYAAAAAACBCRYDRhl1WPPDl5P0n7fK6uWgf\",\n \"10\",\n \"1\"\n ]\n}") .asString(); ``` ### C# ```csharp using RestSharp; var options = new RestClientOptions("https://sui-mainnet.g.alchemy.com/v2/docs-demo"); var client = new RestClient(options); var request = new RestRequest(""); request.AddJsonBody("{\n \"jsonrpc\": \"2.0\",\n \"id\": 1,\n \"method\": \"sui_devInspectTransactionBlock\",\n \"params\": [\n \"0x8d59ac375d6bea13560d6ddcf33a3d6f45fa9f5b1be6819974242480b678711a\",\n \"AAPDdSGd1K6HApnQ1UMmEIOXvtBFDAEFAAAAAAAAADDat41YRxp4SW63HCxud7omjwOQOg6huYDqcvdFeE95OGaVEnTPlWWtjAYAAAAAACBCRYDRhl1WPPDl5P0n7fK6uWgf\",\n \"10\",\n \"1\"\n ]\n}", false); var response = await client.PostAsync(request); Console.WriteLine("{0}", response.Content); ``` ## OpenRPC Method Specification ```yaml name: sui_devInspectTransactionBlock summary: Run a transaction in dev-inspect mode description: | Runs a transaction in dev-inspect mode. This allows testing nearly any transaction with any arguments. Detailed results are provided, including execution effects and return values. Note: gas is not charged, but usage is calculated. params: - name: sender_address required: true description: The address that initiates the dev inspect transaction. schema: type: string - name: tx_bytes required: true description: Base64-encoded BCS transaction kind (excluding gas info). schema: type: string - name: gas_price required: true description: Simulated gas price to be used during dev inspect (gas is not deducted). schema: type: string - name: epoch required: true description: The epoch context in which to perform the inspection. schema: type: string result: name: result description: Simulated transaction inspection result. schema: type: object properties: effects: type: object description: The simulated effects of the transaction. properties: messageVersion: type: string status: type: object properties: status: type: string executedEpoch: type: string gasUsed: type: object properties: computationCost: type: string storageCost: type: string storageRebate: type: string nonRefundableStorageFee: type: string transactionDigest: type: string mutated: type: array items: type: object properties: owner: type: object properties: AddressOwner: type: string reference: type: object properties: objectId: type: string version: type: integer digest: type: string gasObject: type: object properties: owner: type: object properties: ObjectOwner: type: string reference: type: object properties: objectId: type: string version: type: integer digest: type: string eventsDigest: type: string events: type: array description: Events that would be emitted if the transaction were run. items: type: object error: type: - string - 'null' description: Execution error message, if any. results: type: array description: Return values and execution results for Move calls. items: type: object examples: - name: Dev Inspect SUI transaction params: - name: sender_address value: '0x8d59ac375d6bea13560d6ddcf33a3d6f45fa9f5b1be6819974242480b678711a' - name: tx_bytes value: AAPDdSGd1K6HApnQ1UMmEIOXvtBFDAEFAAAAAAAAADDat41YRxp4SW63HCxud7omjwOQOg6huYDqcvdFeE95OGaVEnTPlWWtjAYAAAAAACBCRYDRhl1WPPDl5P0n7fK6uWgf - name: gas_price value: '10' - name: epoch value: '1' result: name: result value: effects: messageVersion: v1 status: status: success executedEpoch: '0' gasUsed: computationCost: '100' storageCost: '100' storageRebate: '10' nonRefundableStorageFee: '0' transactionDigest: 76gyHCk7FRrGACRqXM7Ybj5uJLtAzgEMJ5P9CeEzxZSG mutated: - owner: AddressOwner: '0x2f5c543d716ae43d453deb3b199bbdaf1bc7030c7682f87703dce431248fede0' reference: objectId: '0x2c43805d0d6f5402a7ad0da5bdec549c7cdea06bc4a1d339a22521eea933b889' version: 2 digest: BhbWpBeESxuRWvmvLMyb2JNUuFa6j4aG1T4WUiPgKAHm - owner: AddressOwner: '0x67c6d31c6c970e567f03ef67d811a4f843665b8de3f282fa48b3e0103ba9bbed' reference: objectId: '0x6a06153b9fc486e101f0e9e2703ac8666d06aecc4ddf7e7926a361970c65a5b1' version: 2 digest: GdfET1avZReDftpJNB8LSuHJ2cKUheSbEaLMzuPVXHsM gasObject: owner: ObjectOwner: '0x2f5c543d716ae43d453deb3b199bbdaf1bc7030c7682f87703dce431248fede0' reference: objectId: '0x2c43805d0d6f5402a7ad0da5bdec549c7cdea06bc4a1d339a22521eea933b889' version: 2 digest: BhbWpBeESxuRWvmvLMyb2JNUuFa6j4aG1T4WUiPgKAHm eventsDigest: 6kerMphN4S5QTfd9TAhwMiFq1q9c2YwfpheBfWm85vUq events: [] ```