Estimate UserOperation Gas

eth_estimateUserOperationGas

This endpoint is used to estimate the gas values for a UserOperation. Request constitutes given UserOperation optionally without gas limits and gas prices & returns the needed gas limits. The signature field is ignored by the wallet, so that the operation will not require user’s approval. It still requires putting a “semi-valid” signature (e.g. a signature in the right length).

Parameters

Body

Param	Type	Description	Required
method	string	Name of method in this case: eth_estimateUserOperationGas	Required
params	array	An array consisting of the Useroperation object and Bundler address	Required
id	string	id for request determined by client for JSON RPC requests	Required
jsonrpc	string	JSON RPC version in this case 2.0.0	Required

Request

{
  "method": "eth_estimateUserOperationGas",
  "params": [
    {
      "sender": "0x5A927A01a32cE02AF4B438b7848BceBc52C8Ea3e",
      "nonce": "0x1b",
      "initCode": "0x",
      "callData": "0x0000189a0000000000000000000000001758f42af7026fbbb559dc60ece0de3ef81f665e00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000002440d097c30000000000000000000000005a927a01a32ce02af4b438b7848bcebc52c8ea3e00000000000000000000000000000000000000000000000000000000",
      "signature": "0x00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000001c5b32F37F5beA87BDD5374eB2aC54eA8e000000000000000000000000000000000000000000000000000000000000004181d4b4981670cb18f99f0b4a66446df1bf5b204d24cfcb659bf38ba27a4359b5711649ec2423c5e1247245eba2964679b6a1dbb85c992ae40b9b00c6935b02ff1b00000000000000000000000000000000000000000000000000000000000000",
      "paymasterAndData": "0x"
    },
    "0x5ff137d4b0fdcd49dca30c7cf57e578a026d2789"
  ],
  "id": 1697033406,
  "jsonrpc": "2.0"
}

Response

{
  "jsonrpc": "2.0",
  "id": 1697033406,
  "result": {
    "callGasLimit": 77217,
    "verificationGasLimit": 86895,
    "preVerificationGas": 772931,
    "validUntil": {
      "type": "BigNumber",
      "hex": "0xffffffffffff"
    },
    "validAfter": {
      "type": "BigNumber",
      "hex": "0x00"
    },
    "maxPriorityFeePerGas": "0",
    "maxFeePerGas": "100000000"
  }
}