# linea_estimateGas > For the complete documentation index, see [llms.txt](/docs/llms.txt). POST https://linea-mainnet.g.alchemy.com/v2/{apiKey} Generates and returns the estimated amount of gas required to allow the transaction to complete and be published on Ethereum. This method does not submit the transaction to the blockchain. The priorityFeePerGas returned includes the cost of submitting the transaction to Ethereum, which can vary based on the size of the calldata. Reference: https://www.alchemy.com/docs/chains/linea/linea-api-endpoints/linea-estimate-gas ## Parameters | Name | Type | Required | Description | |------|------|----------|-------------| | Call object | object | Yes | The transaction call object. | | State override object | object | No | Optional object to override account state for simulation. | ## Result **Gas estimation result** (object): Estimated gas limit, base fee, and priority fee. ## Example ### Request ```json { "jsonrpc": "2.0", "method": "linea_estimateGas", "params": [ { "from": "0x42c27251C710864Cf76f1b9918Ace3E585e6E21b", "value": "0x1", "gasPrice": "0x100000000", "gas": "0x21000" } ], "id": 1 } ``` ### Response ```json { "jsonrpc": "2.0", "result": { "gasLimit": "0xcf08", "baseFeePerGas": "0x7", "priorityFeePerGas": "0x43a82a4" }, "id": 1 } ``` ## Code Examples ### cURL ```bash curl --request POST \ --url https://linea-mainnet.g.alchemy.com/v2/docs-demo \ --header 'Content-Type: application/json' \ --data '{ "jsonrpc": "2.0", "id": 1, "method": "linea_estimateGas", "params": [ { "from": "0x42c27251C710864Cf76f1b9918Ace3E585e6E21b", "value": "0x1", "gasPrice": "0x100000000", "gas": "0x21000" }, { "property1": { "balance": "string", "nonce": "string", "code": "string", "stateDiff": { "property1": "string" } } } ] }' ``` ### JavaScript ```javascript const options = { method: 'POST', headers: {'Content-Type': 'application/json'}, body: JSON.stringify({ jsonrpc: '2.0', id: 1, method: 'linea_estimateGas', params: [ { from: '0x42c27251C710864Cf76f1b9918Ace3E585e6E21b', value: '0x1', gasPrice: '0x100000000', gas: '0x21000' }, { property1: { balance: 'string', nonce: 'string', code: 'string', stateDiff: {property1: 'string'} } } ] }) }; fetch('https://linea-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://linea-mainnet.g.alchemy.com/v2/docs-demo" payload = { "jsonrpc": "2.0", "id": 1, "method": "linea_estimateGas", "params": [{ "from": "0x42c27251C710864Cf76f1b9918Ace3E585e6E21b", "value": "0x1", "gasPrice": "0x100000000", "gas": "0x21000" }, { "property1": { "balance": "string", "nonce": "string", "code": "string", "stateDiff": { "property1": "string" } } }] } 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://linea-mainnet.g.alchemy.com/v2/docs-demo" payload := strings.NewReader("{\n \"jsonrpc\": \"2.0\",\n \"id\": 1,\n \"method\": \"linea_estimateGas\",\n \"params\": [\n {\n \"from\": \"0x42c27251C710864Cf76f1b9918Ace3E585e6E21b\",\n \"value\": \"0x1\",\n \"gasPrice\": \"0x100000000\",\n \"gas\": \"0x21000\"\n },\n {\n \"property1\": {\n \"balance\": \"string\",\n \"nonce\": \"string\",\n \"code\": \"string\",\n \"stateDiff\": {\n \"property1\": \"string\"\n }\n }\n }\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://linea-mainnet.g.alchemy.com/v2/docs-demo") .header("Content-Type", "application/json") .body("{\n \"jsonrpc\": \"2.0\",\n \"id\": 1,\n \"method\": \"linea_estimateGas\",\n \"params\": [\n {\n \"from\": \"0x42c27251C710864Cf76f1b9918Ace3E585e6E21b\",\n \"value\": \"0x1\",\n \"gasPrice\": \"0x100000000\",\n \"gas\": \"0x21000\"\n },\n {\n \"property1\": {\n \"balance\": \"string\",\n \"nonce\": \"string\",\n \"code\": \"string\",\n \"stateDiff\": {\n \"property1\": \"string\"\n }\n }\n }\n ]\n}") .asString(); ``` ### C# ```csharp using RestSharp; var options = new RestClientOptions("https://linea-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\": \"linea_estimateGas\",\n \"params\": [\n {\n \"from\": \"0x42c27251C710864Cf76f1b9918Ace3E585e6E21b\",\n \"value\": \"0x1\",\n \"gasPrice\": \"0x100000000\",\n \"gas\": \"0x21000\"\n },\n {\n \"property1\": {\n \"balance\": \"string\",\n \"nonce\": \"string\",\n \"code\": \"string\",\n \"stateDiff\": {\n \"property1\": \"string\"\n }\n }\n }\n ]\n}", false); var response = await client.PostAsync(request); Console.WriteLine("{0}", response.Content); ``` ## OpenRPC Method Specification ```yaml name: linea_estimateGas description: | Generates and returns the estimated amount of gas required to allow the transaction to complete and be published on Ethereum. This method does not submit the transaction to the blockchain. The priorityFeePerGas returned includes the cost of submitting the transaction to Ethereum, which can vary based on the size of the calldata. params: - name: Call object required: true description: The transaction call object. schema: type: object required: [] additionalProperties: false properties: from: type: string description: 20-byte sender address. to: type: string description: 20-byte recipient address. gas: type: string description: Hexadecimal gas limit for execution. gasPrice: type: string description: Hexadecimal gas price per unit. maxPriorityFeePerGas: type: string description: Max priority fee per gas in wei. maxFeePerGas: type: string description: Max total fee (base + priority) per gas in wei. value: type: string description: Hexadecimal value of ETH to send with the transaction. data: type: string description: ABI-encoded data (function selector + params). - name: State override object required: false description: Optional object to override account state for simulation. schema: type: object description: Mapping of account addresses to temporary override objects. additionalProperties: type: object required: [] additionalProperties: false properties: balance: type: string description: Hexadecimal temporary balance override. nonce: type: string description: Hexadecimal temporary nonce override. code: type: string description: Temporary bytecode override. stateDiff: type: object description: Storage slot override map. additionalProperties: type: string result: name: Gas estimation result description: Estimated gas limit, base fee, and priority fee. schema: type: object required: - gasLimit - baseFeePerGas - priorityFeePerGas additionalProperties: false properties: gasLimit: type: string description: Recommended gas limit for the transaction. baseFeePerGas: type: string description: Estimated base fee per gas in hexadecimal format. priorityFeePerGas: type: string description: Estimated priority fee per gas in hexadecimal format. examples: - name: Simple ETH transfer params: - name: Call object value: from: '0x42c27251C710864Cf76f1b9918Ace3E585e6E21b' value: '0x1' gasPrice: '0x100000000' gas: '0x21000' result: name: Gas estimation result value: gasLimit: '0xcf08' baseFeePerGas: '0x7' priorityFeePerGas: '0x43a82a4' ```