Refund Initiate

# 1. Compute the auth hash: sha256(key|transaction_id|refund_amount|salt)
API_KEY="YOUR_API_KEY"
API_SALT="YOUR_API_SALT"
HASH=$(printf '%s' "$API_KEY|TXN20260707172038123|150.00|$API_SALT" | openssl dgst -sha256 | awk '{print $2}')

# 2. Call the API
curl -X POST "https://api.growthbnk.com/v1/route/refund-initiate/" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $API_KEY" \
  -H "Hash: $HASH" \
  -d '{
    "transaction_id": "TXN20260707172038123",
    "refund_amount": "150.00",
    "refund_reason": "Customer requested cancellation"
}'

import hashlib
import requests

API_KEY = "YOUR_API_KEY"
API_SALT = "YOUR_API_SALT"
BASE_URL = "https://api.growthbnk.com"

payload = {
    'transaction_id': 'TXN20260707172038123',
    'refund_amount': '150.00',
    'refund_reason': 'Customer requested cancellation'
}

# Auth hash: sha256(key|transaction_id|refund_amount|salt)
signing = f"{API_KEY}|TXN20260707172038123|150.00|{API_SALT}"
auth_hash = hashlib.sha256(signing.encode("utf-8")).hexdigest()

response = requests.post(
    f"{BASE_URL}/v1/route/refund-initiate/",
    json=payload,
    headers={
        "Content-Type": "application/json",
        "X-API-Key": API_KEY,
        "Hash": auth_hash,
    },
    timeout=30,
)
response.raise_for_status()
print(response.json())

<?php
$apiKey  = 'YOUR_API_KEY';
$apiSalt = 'YOUR_API_SALT';
$baseUrl = 'https://api.growthbnk.com';

$payload = [
    'transaction_id' => 'TXN20260707172038123',
    'refund_amount' => '150.00',
    'refund_reason' => 'Customer requested cancellation'
];

// Auth hash: sha256(key|transaction_id|refund_amount|salt)
$signing = "{$apiKey}|TXN20260707172038123|150.00|{$apiSalt}";
$authHash = hash('sha256', $signing);

$ch = curl_init("{$baseUrl}/v1/route/refund-initiate/");
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_CUSTOMREQUEST  => 'POST',
    CURLOPT_HTTPHEADER     => [
        'Content-Type: application/json',
        "X-API-Key: {$apiKey}",
        "Hash: {$authHash}",
    ],
    CURLOPT_POSTFIELDS => json_encode($payload),
]);
$response = curl_exec($ch);
curl_close($ch);
echo $response;

const crypto = require('crypto');

const API_KEY = 'YOUR_API_KEY';
const API_SALT = 'YOUR_API_SALT';
const BASE_URL = 'https://api.growthbnk.com';

const payload = {
    'transaction_id': 'TXN20260707172038123',
    'refund_amount': '150.00',
    'refund_reason': 'Customer requested cancellation'
};

// Auth hash: sha256(key|transaction_id|refund_amount|salt)
const signing = `${API_KEY}|TXN20260707172038123|150.00|${API_SALT}`;
const authHash = crypto.createHash('sha256').update(signing).digest('hex');

const response = await fetch(`${BASE_URL}/v1/route/refund-initiate/`, {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'X-API-Key': API_KEY,
    'Hash': authHash,
  },
  body: JSON.stringify(payload),
});
console.log(await response.json());

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;

public class GrowthBnkExample {
    public static void main(String[] args) throws Exception {
        String apiKey = "YOUR_API_KEY";
        String apiSalt = "YOUR_API_SALT";
        String baseUrl = "https://api.growthbnk.com";

        String payload = """
{
    "transaction_id": "TXN20260707172038123",
    "refund_amount": "150.00",
    "refund_reason": "Customer requested cancellation"
}
""";

        // Auth hash: sha256(key|transaction_id|refund_amount|salt)
        String signing = apiKey + "|TXN20260707172038123|150.00|" + apiSalt;
        String authHash = sha256Hex(signing);

        HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create(baseUrl + "/v1/route/refund-initiate/"))
            .header("Content-Type", "application/json")
            .header("X-API-Key", apiKey)
            .header("Hash", authHash)
            .method("POST", HttpRequest.BodyPublishers.ofString(payload))
            .build();

        HttpResponse<String> response = HttpClient.newHttpClient()
            .send(request, HttpResponse.BodyHandlers.ofString());
        System.out.println(response.body());
    }

    private static String sha256Hex(String input) throws Exception {
        byte[] digest = MessageDigest.getInstance("SHA-256")
            .digest(input.getBytes(StandardCharsets.UTF_8));
        StringBuilder sb = new StringBuilder();
        for (byte b : digest) sb.append(String.format("%02x", b));
        return sb.toString();
    }
}

using System;
using System.Net.Http;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

class GrowthBnkExample
{
    static async Task Main()
    {
        var apiKey = "YOUR_API_KEY";
        var apiSalt = "YOUR_API_SALT";
        var baseUrl = "https://api.growthbnk.com";

        var payload = """
{
    "transaction_id": "TXN20260707172038123",
    "refund_amount": "150.00",
    "refund_reason": "Customer requested cancellation"
}
""";

        // Auth hash: sha256(key|transaction_id|refund_amount|salt)
        var signing = $"{apiKey}|TXN20260707172038123|150.00|{apiSalt}";
        var authHash = Convert.ToHexString(
            SHA256.HashData(Encoding.UTF8.GetBytes(signing))).ToLowerInvariant();

        using var client = new HttpClient();
        client.DefaultRequestHeaders.Add("X-API-Key", apiKey);
        client.DefaultRequestHeaders.Add("Hash", authHash);

        var content = new StringContent(payload, Encoding.UTF8, "application/json");
        var response = await client.PostAsync($"{baseUrl}/v1/route/refund-initiate/", content);
        Console.WriteLine(await response.Content.ReadAsStringAsync());
    }
}

package main

import (
	"bytes"
	"crypto/sha256"
	"encoding/hex"
	"fmt"
	"io"
	"net/http"
)

func main() {
	apiKey := "YOUR_API_KEY"
	apiSalt := "YOUR_API_SALT"
	baseURL := "https://api.growthbnk.com"

	payload := []byte(`{
    "transaction_id": "TXN20260707172038123",
    "refund_amount": "150.00",
    "refund_reason": "Customer requested cancellation"
}`)

	// Auth hash: sha256(key|transaction_id|refund_amount|salt)
	signing := apiKey + "|TXN20260707172038123|150.00|" + apiSalt
	sum := sha256.Sum256([]byte(signing))
	authHash := hex.EncodeToString(sum[:])

	req, _ := http.NewRequest("POST", baseURL+"/v1/route/refund-initiate/", bytes.NewReader(payload))
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("X-API-Key", apiKey)
	req.Header.Set("Hash", authHash)

	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require 'digest'
require 'json'
require 'net/http'
require 'uri'

api_key = 'YOUR_API_KEY'
api_salt = 'YOUR_API_SALT'
base_url = 'https://api.growthbnk.com'

payload = {
    'transaction_id' => 'TXN20260707172038123',
    'refund_amount' => '150.00',
    'refund_reason' => 'Customer requested cancellation'
}

# Auth hash: sha256(key|transaction_id|refund_amount|salt)
signing = "#{api_key}|TXN20260707172038123|150.00|#{api_salt}"
auth_hash = Digest::SHA256.hexdigest(signing)

uri = URI("#{base_url}/v1/route/refund-initiate/")
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true

request = Net::HTTP::Post.new(uri, {
  'Content-Type' => 'application/json',
  'X-API-Key' => api_key,
  'Hash' => auth_hash
})
request.body = payload.to_json

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