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

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
  }
}