createUserOp

Learn how to use the createUserOp JSON-RPC method.

POST /#particle_aa_createUserOp

createUserOp

cURL

curl --request POST \
  --url 'https://rpc.particle.network/evm-chain/#particle_aa_createUserOp' \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "particle_aa_createUserOp",
  "params": [
    "<string>"
  ]
}
'

import requests

url = "https://rpc.particle.network/evm-chain/#particle_aa_createUserOp"

payload = {
    "jsonrpc": "2.0",
    "id": 1,
    "method": "particle_aa_createUserOp",
    "params": ["<string>"]
}
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    jsonrpc: '2.0',
    id: 1,
    method: 'particle_aa_createUserOp',
    params: ['<string>']
  })
};

fetch('https://rpc.particle.network/evm-chain/#particle_aa_createUserOp', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://rpc.particle.network/evm-chain/#particle_aa_createUserOp",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'jsonrpc' => '2.0',
    'id' => 1,
    'method' => 'particle_aa_createUserOp',
    'params' => [
        '<string>'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Basic <encoded-value>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://rpc.particle.network/evm-chain/#particle_aa_createUserOp"

	payload := strings.NewReader("{\n  \"jsonrpc\": \"2.0\",\n  \"id\": 1,\n  \"method\": \"particle_aa_createUserOp\",\n  \"params\": [\n    \"<string>\"\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Basic <encoded-value>")
	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))

}

HttpResponse<String> response = Unirest.post("https://rpc.particle.network/evm-chain/#particle_aa_createUserOp")
  .header("Authorization", "Basic <encoded-value>")
  .header("Content-Type", "application/json")
  .body("{\n  \"jsonrpc\": \"2.0\",\n  \"id\": 1,\n  \"method\": \"particle_aa_createUserOp\",\n  \"params\": [\n    \"<string>\"\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://rpc.particle.network/evm-chain/#particle_aa_createUserOp")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Basic <encoded-value>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"jsonrpc\": \"2.0\",\n  \"id\": 1,\n  \"method\": \"particle_aa_createUserOp\",\n  \"params\": [\n    \"<string>\"\n  ]\n}"

response = http.request(request)
puts response.read_body

200

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "userOp": {},
    "userOpHash": "0xUserOpHash"
  },
  "chainId": 80001
}

Understanding createUserOp

• createUserOp will construct and return a UserOperation object and hash using a transaction or collection of transactions, alongside smart account and fee payment information. It takes:
  • Account config object:
    • name - string, either BICONOMY, CYBERCONNECT, or SIMPLE.
    • version - string, either 1.0.0 or 2.0.0.
    • ownerAddress - string.
    • biconomyApiKey - (optional, for using Biconomy’s Paymaster), string.
  • Array of transactions:
    • Standard transaction object.
  • Optionally, a token feeQuote object, retrieved from getFeeQuotes, only used if you’re paying the gas fee in an ERC-20 token.
  • Token paymaster address - (optional), string.

---

Query example

JSON

{
  "jsonrpc": "2.0",
  "id": "4259f7fe-87aa-44fd-89c8-fc1e41f6d3d8",
  "chainId": 80001,
  "method": "particle_aa_createUserOp",
  "params": [
    // account config
    {
      "name": "BICONOMY",
      "version": "1.0.0",
      "ownerAddress": "0xA60123a1056e9D38B64c4993615F27cCe9A9E8D5",
      "biconomyApiKey": "LdF-gC43H.6f0ec763-fde5-4d5e-89f6-1b9ef12ba4a4" // optional
    },
    // txs
    [
      {
        "to": "0x329a7f8b91Ce7479035cb1B5D62AB41845830Ce8",
        "value": "0x1",
        "data": "0x"
      }
    ],
    // optional: If you don't pass the following params, it'll create a gasless/user paid user op
    // token feeQuote
    {
      "tokenInfo": {
        "chainId": 80001,
        "name": "WMATIC",
        "symbol": "WMATIC",
        "decimals": 18,
        "address": "0x9c3C9283D3e44854697Cd22D3Faa240Cfb032889",
        "logoURI": "https://polygonscan.com/token/images/wMatic_32.png"
      },
      "fee": "374428266633331",
      "balance": "1019119852023946296",
      "premiumPercentage": "10"
    },
    // token paymaster address
    "0x00000f7365cA6C59A2C93719ad53d567ed49c14C"
  ]
}

Authorizations

Authorization · string · header · required

Basic authentication header of the form Basic <encoded-value>, where <encoded-value> is the base64-encoded string username:password.

Body

application/json

Request to create a user operation.

jsonrpc · string · default: 2.0 · required

Version of the JSON-RPC protocol, should be 2.0.

Example:

"2.0"

id · integer · default: 1 · required

The request identifier.

Example:

1

method · enum<string> · required

API method being called.

Available options: particle_aa_createUserOp

params · string · object · object · string[] · required

Parameters for creating a user operation.

Response

200 - application/json

Successful response with created user operation details.

jsonrpc · string · default: 2.0 · required

Version of the JSON-RPC protocol, should be 2.0.

Example:

"2.0"

id · integer · default: 1 · required

The request identifier.

Example:

1

result · object · required

Show child attributes

chainId · integer

The blockchain chain ID.

Example:

80001