curl --request POST \
  --url https://api.banking.v2.portao3.com.br/realms/{realmId}/organizations/{organizationId}/accounts/{accountId}/wallets/{walletId}/transactions/{transactionId}/reversals \
  --header 'Content-Type: application/json' \
  --data '
{
  "amount": 5000,
  "description": "Devolução do pedido 1234"
}
'

import requests

url = "https://api.banking.v2.portao3.com.br/realms/{realmId}/organizations/{organizationId}/accounts/{accountId}/wallets/{walletId}/transactions/{transactionId}/reversals"

payload = {
    "amount": 5000,
    "description": "Devolução do pedido 1234"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({amount: 5000, description: 'Devolução do pedido 1234'})
};

fetch('https://api.banking.v2.portao3.com.br/realms/{realmId}/organizations/{organizationId}/accounts/{accountId}/wallets/{walletId}/transactions/{transactionId}/reversals', 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://api.banking.v2.portao3.com.br/realms/{realmId}/organizations/{organizationId}/accounts/{accountId}/wallets/{walletId}/transactions/{transactionId}/reversals",
  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([
    'amount' => 5000,
    'description' => 'Devolução do pedido 1234'
  ]),
  CURLOPT_HTTPHEADER => [
    "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://api.banking.v2.portao3.com.br/realms/{realmId}/organizations/{organizationId}/accounts/{accountId}/wallets/{walletId}/transactions/{transactionId}/reversals"

	payload := strings.NewReader("{\n  \"amount\": 5000,\n  \"description\": \"Devolução do pedido 1234\"\n}")

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

	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://api.banking.v2.portao3.com.br/realms/{realmId}/organizations/{organizationId}/accounts/{accountId}/wallets/{walletId}/transactions/{transactionId}/reversals")
  .header("Content-Type", "application/json")
  .body("{\n  \"amount\": 5000,\n  \"description\": \"Devolução do pedido 1234\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.banking.v2.portao3.com.br/realms/{realmId}/organizations/{organizationId}/accounts/{accountId}/wallets/{walletId}/transactions/{transactionId}/reversals")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"amount\": 5000,\n  \"description\": \"Devolução do pedido 1234\"\n}"

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

{
  "_id": "6710d2e4b4d3e80012c9a1f7",
  "environment": "LIVE",
  "realmId": "f495ff0c-ab54-4f99-8e92-ca8682e4de9b",
  "organizationId": "c4bd3f21-dfbd-44e8-8055-68ba15bed410",
  "accountId": "66f2a1c7b4d3e80012c9a0b4",
  "walletId": "66f2a3d1b4d3e80012c9a0d2",
  "transactionId": "6710c9a1b4d3e80012c9a1e2",
  "status": "INITIATED",
  "originalEffectiveAt": "2026-10-16T18:40:11.000Z",
  "originalAmount": 50000,
  "originalCurrency": "986",
  "reversalReason": "USER_REQUESTED",
  "reversalDescription": "Pedido cancelado pelo cliente",
  "reversalEffectiveAt": null,
  "reversalAmount": 50000,
  "reversalCurrency": "986",
  "processingType": "INSTANT",
  "createdAt": "2026-10-17T14:21:40.000Z",
  "updatedAt": "2026-10-17T14:22:05.000Z",
  "requestedAt": "2026-10-17T14:22:03.000Z",
  "originalPixId": "6710c9a0b4d3e80012c9a1e0",
  "originalPixBillingId": "6710c5f2b4d3e80012c9a1d4",
  "originalReceipt": {
    "endToEndId": "E18236120202611021310s0123456789"
  },
  "originalCreditParty": {
    "_id": "6710d2e4b4d3e80012c9a1f8",
    "bankIspb": "18236120",
    "accountType": "CACC",
    "document": "12345678000190",
    "keyType": "EMAIL",
    "key": "financeiro@cliente.com.br",
    "name": "Cliente Exemplo Ltda",
    "street": "Rua das Flores, 100",
    "city": "Curitiba",
    "state": "PR",
    "postalCode": "80010000",
    "branch": "0001",
    "accountNumber": "123456"
  },
  "originalDebitParty": {
    "_id": "6710d2e4b4d3e80012c9a1f8",
    "bankIspb": "18236120",
    "accountType": "CACC",
    "document": "12345678000190",
    "keyType": "EMAIL",
    "key": "financeiro@cliente.com.br",
    "name": "Cliente Exemplo Ltda",
    "street": "Rua das Flores, 100",
    "city": "Curitiba",
    "state": "PR",
    "postalCode": "80010000",
    "branch": "0001",
    "accountNumber": "123456"
  },
  "reversalAdditionalInformation": "Estorno referente ao pedido 4471",
  "reversalReceipt": {
    "endToEndId": "E18236120202611021310s0123456789"
  },
  "errorCode": "AM04",
  "errorDescription": "Saldo insuficiente na conta do recebedor",
  "external": {
    "reversalId": "rev_6b8f0c2a9d1e4f3a"
  },
  "__v": 0
}

{
  "traceId": "1-68ee2a1b-3c4d5e6f7a8b9c0d1e2f3a4b",
  "code": "FORBIDDEN_WALLET",
  "origin": "BANKING",
  "message": "You do not have permission to perform this action on this wallet"
}

{
  "traceId": "1-68ee2a1b-3c4d5e6f7a8b9c0d1e2f3a4b",
  "code": "ACCOUNT_NOT_FOUND",
  "origin": "BANKING",
  "message": "Account not found"
}

{
  "traceId": "1-68ee2a1b-3c4d5e6f7a8b9c0d1e2f3a4b",
  "code": "BAD_REQUEST",
  "origin": "BANKING",
  "message": "Bad Request: Your request is invalid or incomplete. Please make sure you are requesting with the right fields.",
  "fields": [
    {
      "field": "amount",
      "message": "Invalid input: expected integer, received undefined",
      "code": "AMOUNT_REQUIRED"
    }
  ]
}