app.py

import streamlit as st
import requests
import base64

# Title of the app
st.title("Modern Treasury API Integration")
st.subheader("Made by Citibank Demo Business Inc.")

# Sidebar for API key and Organization ID input
st.sidebar.header("API Configuration")
api_key = st.sidebar.text_input("Enter your Modern Treasury API Key", type="password")
organization_id = st.sidebar.text_input("Enter your Organization ID")

# Select the API endpoint the user wants to interact with
endpoint_choice = st.selectbox("Choose API Endpoint", [
    "Payment Orders",
    "Expected Payments",
    "Returns",
    "Incoming Payment Details",
    "Counterparties",
    "Internal Accounts",
    "Ledgers",
    "Ledger Accounts"
])

# Base URL for Modern Treasury API
base_url = "https://app.moderntreasury.com/api/"

# Define API endpoints including Ledgers and Ledger Accounts
MODERN_TREASURY_ENDPOINTS = {
    "Payment Orders": "payment_orders",
    "Expected Payments": "expected_payments",
    "Returns": "returns",
    "Incoming Payment Details": "incoming_payment_details",
    "Counterparties": "counterparties",
    "Internal Accounts": "internal_accounts",
    "Ledgers": "ledgers",
    "Ledger Accounts": "ledger_accounts"
}

# Function to create the Basic Auth header by encoding the Organization ID and API Key
def create_basic_auth_header(org_id, api_key):
    # Combine Organization ID and API Key, separated by a colon
    credentials = f"{org_id}:{api_key}"
    # Encode the credentials in base64
    base64_credentials = base64.b64encode(credentials.encode()).decode('utf-8')
    # Return the full Authorization header
    return f"Basic {base64_credentials}"

# Function to fetch data from the selected Modern Treasury API endpoint
def fetch_data(api_key, org_id, endpoint):
    url = base_url + MODERN_TREASURY_ENDPOINTS[endpoint]
    # Create the Basic Auth header
    headers = {
        "Authorization": create_basic_auth_header(org_id, api_key)
    }
    response = requests.get(url, headers=headers)
    
    if response.status_code == 200:
        return response.json()
    else:
        st.error(f"Error: {response.status_code} - {response.text}")
        return None

# Main logic to fetch and display data
if st.button("Fetch Data"):
    if api_key and organization_id:
        data = fetch_data(api_key, organization_id, endpoint_choice)
        if data:
            st.json(data)
    else:
        st.error("Please provide both a valid API key and Organization ID.")

# Display footer
st.sidebar.markdown("Powered by Streamlit and Modern Treasury API")
st.sidebar.markdown("Made by Citibank Demo Business Inc.")