gobiz-pay

TypeScript SDK/module for interacting with the GoBiz (GoPay Merchant) API. It supports fetching transaction history, monitoring incoming payments in real-time (via polling), and generating dynamic QRIS payloads.

Key Features

• Flexible Authentication: Supports both password-based and passwordless (Email/Phone OTP) login.
• Automatic Session Management: Credentials and session tokens are securely cached locally in the working directory (.gobiz-cache.json).
• Dynamic QRIS Generation: Formats static QRIS payloads into dynamic QRIS based on transaction amounts.
• Real-Time Monitoring: Monitors incoming payments via a polling mechanism with customizable amount tolerances.

System Requirements

• Node.js >= 18
• An active GoBiz Merchant Account
• Merchant's static QRIS string (for dynamic QRIS generation)

Installation

npm install gobiz-pay

Configuration

Create a .env file in the root of your project:

GOPAY_EMAIL=email@merchant.com
GOPAY_PASSWORD=password_merchant
QRIS_STRING=0002010102112657...

Note: Session tokens and Merchant IDs are cached automatically in .gobiz-cache.json in the current working directory to avoid re-authentication.

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Usage Guide

1. Authentication (Login)

Using Credentials from .env (Email & Password)

import { GoPayMerchant } from "gobiz-pay";

const merchant = new GoPayMerchant();
await merchant.init(); // Authenticates and initializes the session automatically

Using OTP (Email / Phone Number)

import { GoPayMerchant } from "gobiz-pay";

const merchant = new GoPayMerchant();

// Option A: OTP via Email
await merchant.requestLoginOtp();
await merchant.loginWithOtp("123456");

// Option B: OTP via Phone Number
await merchant.requestPhoneOtp("85123456789"); // Defaults to country code "62"
await merchant.loginWithPhone("123456");

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2. Transaction History

const result = await merchant.getHistory({ days: 1, size: 20 });

if (result.status && result.data) {
  for (const tx of result.data.histories) {
    console.log(`${tx.time} - ${tx.amount.displayed_text}`);
  }
} else {
  console.log(result.message || "No transactions found.");
}

getHistory Options:

Option	Type	Default	Description
days	number	1	Range of days in the past to fetch transaction history
size	number	50	Maximum number of transaction records to retrieve

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3. Monitoring Incoming Payments

Use the shared watcher singleton to monitor incoming payments in real-time:

import { getGoPayWatcher } from "gobiz-pay";

const watcher = getGoPayWatcher();

try {
  // Waits for an IDR 50,000 payment with a 5-minute timeout and an IDR 100 tolerance
  const tx = await watcher.waitForPayment(50000, { 
    timeout: 300_000, 
    tolerance: 100 
  });
  console.log(`Payment Received! ID: ${tx.txId}, Amount: IDR ${tx.amount.toLocaleString("en-US")}`);
} catch (error) {
  console.error("Failed to detect payment:", error.message);
}

waitForPayment Options:

Option	Type	Default	Description
amount	number	Required	Expected transaction amount (IDR)
timeout	number	300000	Timeout threshold in milliseconds (ms)
tolerance	number	0	Expected amount deviation tolerance (IDR)

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4. Generating Dynamic QRIS

import { buildDynamicQris } from "gobiz-pay";

const dynamicPayload = buildDynamicQris(process.env.QRIS_STRING!, 50000);

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CLI Demo

The project includes a CLI utility for testing the payment workflow directly.

Step 1: Authenticate and Save Session

Run one of the login commands to generate and cache your token:

# Login using GOPAY_EMAIL & GOPAY_PASSWORD from .env
npm run demo -- login

# Interactive login using Email OTP
npm run demo -- login --otp

# Interactive login using Phone OTP
npm run demo -- login --phone

Step 2: Generate QRIS & Watch Payment

Once authenticated, you can initiate a transaction:

# Generates an IDR 50,000 QRIS and monitors the payment status in real-time
npm run demo -- 50000

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License

MIT License