curl --request POST \
  --url https://public-test.blips.network/transactions/{transactionId}/reject \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "reason": "KYC_NOT_APPROVED"
}
'

import requests

url = "https://public-test.blips.network/transactions/{transactionId}/reject"

payload = { "reason": "KYC_NOT_APPROVED" }
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({reason: 'KYC_NOT_APPROVED'})
};

fetch('https://public-test.blips.network/transactions/{transactionId}/reject', 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://public-test.blips.network/transactions/{transactionId}/reject",
  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([
    'reason' => 'KYC_NOT_APPROVED'
  ]),
  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://public-test.blips.network/transactions/{transactionId}/reject"

	payload := strings.NewReader("{\n  \"reason\": \"KYC_NOT_APPROVED\"\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://public-test.blips.network/transactions/{transactionId}/reject")
  .header("Authorization", "Basic <encoded-value>")
  .header("Content-Type", "application/json")
  .body("{\n  \"reason\": \"KYC_NOT_APPROVED\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://public-test.blips.network/transactions/{transactionId}/reject")

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  \"reason\": \"KYC_NOT_APPROVED\"\n}"

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

{
  "transactionId": "Transaction:019542f5-b3e7-1d02-0000-000000000021",
  "type": "INCOMING",
  "status": "FAILED",
  "customerId": "Customer:019542f5-b3e7-1d02-0000-000000000001",
  "platformCustomerId": "dbs_cust_4Er9nYwL2mQ8kR7XcT1pZa",
  "createdAt": "2026-04-05T12:00:00Z",
  "updatedAt": "2026-04-05T12:02:00Z",
  "settledAt": "2026-04-05T12:02:00Z",
  "source": {
    "accountId": "InternalAccount:a12dcbd6-dced-4ec4-b756-3c3a9ea3d123",
    "sourceType": "INTERNAL_ACCOUNT"
  },
  "destination": {
    "destinationType": "PPV_ADDRESS",
    "ppvAddress": "alice@dbs.blips.network"
  },
  "receivedAmount": {
    "currencyCode": "SGD",
    "amountMinor": "5000"
  },
  "failureReason": "KYC_NOT_APPROVED"
}

{
  "status": 400,
  "code": "INVALID_REQUEST",
  "message": "Invalid reject reason",
  "details": {
    "reason": "must use uppercase BLIPS reason-token format"
  }
}

{
  "status": 401,
  "code": "UNAUTHORIZED",
  "message": "Invalid or missing API credentials",
  "details": {}
}

{
  "status": 404,
  "code": "TRANSACTION_NOT_FOUND",
  "message": "Transaction not found",
  "details": {}
}

{
  "status": 409,
  "code": "TRANSACTION_NOT_REJECTABLE",
  "message": "Transaction is not rejectable",
  "details": {}
}

{
  "status": 500,
  "code": "INTERNAL_ERROR",
  "message": "Internal service error",
  "details": {}
}