sendUserOp

Learn how to use the sendUserOp JSON-RPC method.

POST /#particle_aa_sendUserOp

sendUserOp

cURL

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

import requests

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

payload = {
    "jsonrpc": "2.0",
    "id": 1,
    "method": "particle_aa_sendUserOp",
    "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_sendUserOp', params: ['<string>']})
};

fetch('https://rpc.particle.network/evm-chain/#particle_aa_sendUserOp', 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_sendUserOp",
  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_sendUserOp',
    '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_sendUserOp"

	payload := strings.NewReader("{\n  \"jsonrpc\": \"2.0\",\n  \"id\": 1,\n  \"method\": \"particle_aa_sendUserOp\",\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_sendUserOp")
  .header("Authorization", "Basic <encoded-value>")
  .header("Content-Type", "application/json")
  .body("{\n  \"jsonrpc\": \"2.0\",\n  \"id\": 1,\n  \"method\": \"particle_aa_sendUserOp\",\n  \"params\": [\n    \"<string>\"\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

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

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_sendUserOp\",\n  \"params\": [\n    \"<string>\"\n  ]\n}"

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

200

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0xResult",
  "chainId": 80001
}

Understanding sendUserOp

• sendUserOp pushes a structured and signed UserOperation to the network, also handling session keys, sender management, etc. It takes:
  • Account config object:
    • name - string.
    • version - string.
    • ownerAddress - string.
    • biconomyApiKey - (optional), string. Should only be used if you’d like to use a Biconomy Paymaster.
  • UserOp object. This should be signed by the user and if applicable, the Paymaster as well.
  • Optionally, sessions array - Session key object(s).

---

Query example

JSON

{
  "jsonrpc": "2.0",
  "id": "89916c65-2a47-4933-aa4c-55f7e29edbf0",
  "chainId": 80001,
  "method": "particle_aa_sendUserOp",
  "params": [
    // account config
    {
      "name": "BICONOMY",
      "version": "1.0.0",
      "ownerAddress": "0xA60123a1056e9D38B64c4993615F27cCe9A9E8D5",
      "biconomyApiKey": "LdF-gC43H.6f0ec763-fde5-4d5e-89f6-1b9ef12ba4a4" // optional
    },
    // user op
    {
      "sender": "0x8fb859e944561678be40cdd2db16551396c0b074",
      "nonce": "0x64",
      "initCode": "0x",
      "callData": "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",
      "signature": "0xf173083acfa6ddfdbbb84023ebdeb07ff2a38aa1a2e7f7b1b2eb27e180ff13987c14d72273b82f448b8e89066045aebb9e5423eea3c2314136cc9c75d7bb716f1b",
      "verificationGasLimit": "0x163b8",
      "callGasLimit": "0xd1e7",
      "preVerificationGas": "50736",
      "paymasterAndData": "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",
      "maxFeePerGas": "1500000034",
      "maxPriorityFeePerGas": "1500000000"
    },
    // Optional
    {
      "sessions": [
          {
              "validUntil": 0,
              "validAfter": 0,
              "sessionValidationModule": "0x4b7f018Fa27a97b6a17b6d4d8Cb3c0e2D9340133",
              "sessionKeyDataInAbi": [ // or use sessionKeyData to replace
                  ["address", "address", "address", "uint256"],
                  [
                      "0x1dacDa1087C4048774bEce7784EB8EC4CfBeDB2c",
                      "0x909E30bdBCb728131E3F8d17150eaE740C904649",
                      "0x11D266772b85C2C5D4f84A41ca3E08e9f04Fb5D3",
                      1
                  ]
              ]
          }
      ],
      "targetSession": {
          "validUntil": 0,
          "validAfter": 0,
          "sessionValidationModule": "0x4b7f018Fa27a97b6a17b6d4d8Cb3c0e2D9340133",
          "sessionKeyDataInAbi": [ // or use sessionKeyData to replace
              ["address", "address", "address", "uint256"],
              [
                  "0x1dacDa1087C4048774bEce7784EB8EC4CfBeDB2c",
                  "0x909E30bdBCb728131E3F8d17150eaE740C904649",
                  "0x11D266772b85C2C5D4f84A41ca3E08e9f04Fb5D3",
                  1
              ]
          ]
      }
    }
  ]
}

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 send 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_sendUserOp

params · (string | object)[] · required

Parameters for sending a user operation.

Response

200 - application/json

Successful response with the result of the 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

result · string · required

Result of the user operation.

Example:

"0xResult"

chainId · integer

The blockchain chain ID.

Example:

80001