eth_estimateUserOperationGas

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

In case of sponsoring with 1Balance 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.

Consider using the staging bundler RPC URL for use cases other than sponsoring with 1Balance.

eth_estimateUserOperationGas

post

Returns estimated gas values for a UserOperation.

Path parameters

chainIdnumberRequired

Target network chain identifier.

Query parameters

sponsorApiKeystringRequired

1Balance API key which covers transaction costs.

Body

idnumberOptional

jsonrpcstringOptionalDefault: 2.0

methodstringOptionalDefault: eth_estimateUserOperationGas

Responses

200

Successful response

application/json

400

Validation error

application/json

post

HTTPcURLJavaScriptPython

POST /bundlers/{chainId}/rpc HTTP/1.1
Host: api.gelato.digital
Content-Type: application/json
Accept: */*
Content-Length: 166

{
  "id": 1,
  "jsonrpc": "text",
  "method": "text",
  "params": [
    {
      "sender": "text",
      "nonce": "text",
      "initCode": "text",
      "callData": "text",
      "signature": "text",
      "paymasterAndData": "text"
    }
  ]
}

{
  "id": 1,
  "jsonrpc": "text",
  "result": {
    "preVerificationGas": 1,
    "verificationGasLimit": 1,
    "callGasLimit": 1
  }
}