eth_estimateUserOperationGas

Please refer to 1Balance & Relay to create a sponsorApiKey.

The estimated preVerificationGas is always zero as it is not required by the bundler. Instead, transaction fees are settled post-execution which avoids overcharging the user. Other implementations unconditionally charge users the entire preVerificationGas amount since this is not metered by the EntryPoint.

See Advantages & Highlights.

eth_estimateUserOperationGas

Returns estimated gas values for a UserOperation.

POSThttps://api.gelato.digital/bundlers/{chainId}/rpc

Path parameters

chainId*number

Target network chain identifier.

Query parameters

Body

application/json

idnumber

jsonrpcstring

methodstring

paramsarray of one of

1. Object - The UserOperation object (gas limits and prices are optional)
2. String - The EntryPoint address the request should be sent through. This MUST be one of the entry points returned by the eth_supportedEntryPoints rpc call.

Response

200400

Successful response

Body

application/json

idnumber

jsonrpcstring

resultobject

Request

JavaScriptCurlPython

const response = await fetch('https://api.gelato.digital/bundlers/{chainId}/rpc?sponsorApiKey=text', {
    method: 'POST',
    headers: {
      "Content-Type": "application/json"
    },
    body: JSON.stringify({}),
});
const data = await response.json();

Response

200400

{
  "id": 1,
  "jsonrpc": "2.0",
  "result": {
    "preVerificationGas": "0x0",
    "verificationGasLimit": "0x148a6",
    "callGasLimit": "0x358e"
  }
}