lnbits-legend/lnbits/wallets/lnpay.py

from os import getenv
from typing import Optional, Dict
from requests import get, post

from .base import InvoiceResponse, PaymentResponse, PaymentStatus, Wallet


class LNPayWallet(Wallet):
    """https://docs.lnpay.co/"""

    def __init__(self):
        endpoint = getenv("LNPAY_API_ENDPOINT")
        self.endpoint = endpoint[:-1] if endpoint.endswith("/") else endpoint
        self.auth_admin = getenv("LNPAY_ADMIN_KEY")
        self.auth_invoice = getenv("LNPAY_INVOICE_KEY")
        self.auth_read = getenv("LNPAY_READ_KEY")
        self.auth_api = {"X-Api-Key": getenv("LNPAY_API_KEY")}

    def create_invoice(
        self, amount: int, memo: Optional[str] = None, description_hash: Optional[bytes] = None
    ) -> InvoiceResponse:
        data: Dict = {"num_satoshis": f"{amount}"}
        if description_hash:
            data["description_hash"] = description_hash.hex()
        else:
            data["memo"] = memo or ""

        r = post(
            url=f"{self.endpoint}/user/wallet/{self.auth_invoice}/invoice",
            headers=self.auth_api,
            json=data,
        )
        ok, checking_id, payment_request, error_message = r.status_code == 201, None, None, r.text

        if ok:
            data = r.json()
            checking_id, payment_request = data["id"], data["payment_request"]

        return InvoiceResponse(ok, checking_id, payment_request, error_message)

    def pay_invoice(self, bolt11: str) -> PaymentResponse:
        r = post(
            url=f"{self.endpoint}/user/wallet/{self.auth_admin}/withdraw",
            headers=self.auth_api,
            json={"payment_request": bolt11},
        )
        ok, checking_id, fee_msat, error_message = r.status_code == 201, None, 0, None

        if ok:
            checking_id = r.json()["lnTx"]["id"]

        return PaymentResponse(ok, checking_id, fee_msat, error_message)

    def get_invoice_status(self, checking_id: str) -> PaymentStatus:
        return self.get_payment_status(checking_id)

    def get_payment_status(self, checking_id: str) -> PaymentStatus:
        r = get(url=f"{self.endpoint}/user/lntx/{checking_id}", headers=self.auth_api)

        if not r.ok:
            return PaymentStatus(None)

        statuses = {0: None, 1: True, -1: False}
        return PaymentStatus(statuses[r.json()["settled"]])