Create a new payment link for receiving payments.

This operation generates a unique payment link that can be shared with customers
for accepting payments. The link can be customized with recipient details,
purpose, customer details and amount.

Required Parameters:
    recipient_name (str): Name of the person or entity receiving the payment
    purpose (str): Description or reason for the payment
    customer_email (str): Email address of the customer
    customer_mobile (str): Mobile number of the customer
    Either customer_email or customer_mobile must be provided if else please ask from the user

Optional Parameters:
    amount (float): Fixed amount for the payment

Note:
    - Amount can be left optional for customer to decide
    - Generated link will be valid according to system's expiry settings
    - Please ask all the required fields from the user don't assume any fields

IMPORTANT NOTE:
    - if user is not providing customer_email or customer_mobile, please ask for the same don't call any tool before asking for the same
    

Retrieve all payment links created by the merchant.

This operation returns a comprehensive list of all payment links created,
including both active and expired links. Each link entry contains details
such as:
    - Link ID
    - Link Name
    - Short URL
    - Status
    - Creation Date
    - Expiry Date

Returns:
    List[PaymentLink]: A list of PaymentLink objects containing link details
    str: Error message in case of failure

Retrieve all transactions associated with a specific payment link.

This operation provides detailed transaction history for a given payment link,
including successful and failed transactions.

Parameters:
    link_id (str): Unique identifier of the payment link

Returns:
    List[Transaction]: List of transactions containing details such as:
        - Transaction ID
        - Order ID
        - Amount
        - Status
        - Completion Time
        - Customer Contact Information
    str: Error message in case of failure