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models.py

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+import json
+from sqlite3 import Row
+
+from fastapi import Query, Request
+from lnurl import Lnurl
+from lnurl import encode as lnurl_encode
+from lnurl.types import LnurlPayMetadata
+from pydantic import BaseModel
+
+ZERO_KEY = "00000000000000000000000000000000"
+
+
+class Card(BaseModel):
+    id: str
+    wallet: str
+    card_name: str
+    uid: str
+    external_id: str
+    counter: int
+    tx_limit: int
+    daily_limit: int
+    enable: bool
+    k0: str
+    k1: str
+    k2: str
+    prev_k0: str
+    prev_k1: str
+    prev_k2: str
+    otp: str
+    time: int
+
+    @classmethod
+    def from_row(cls, row: Row) -> "Card":
+        return cls(**dict(row))
+
+    def lnurl(self, req: Request) -> Lnurl:
+        url = req.url_for("boltcard.lnurl_response", device_id=self.id, _external=True)
+        return lnurl_encode(url)
+
+    async def lnurlpay_metadata(self) -> LnurlPayMetadata:
+        return LnurlPayMetadata(json.dumps([["text/plain", self.card_name]]))
+
+
+class CreateCardData(BaseModel):
+    card_name: str = Query(...)
+    uid: str = Query(...)
+    counter: int = Query(0)
+    tx_limit: int = Query(0)
+    daily_limit: int = Query(0)
+    enable: bool = Query(True)
+    k0: str = Query(ZERO_KEY)
+    k1: str = Query(ZERO_KEY)
+    k2: str = Query(ZERO_KEY)
+    prev_k0: str = Query(ZERO_KEY)
+    prev_k1: str = Query(ZERO_KEY)
+    prev_k2: str = Query(ZERO_KEY)
+
+
+class Hit(BaseModel):
+    id: str
+    card_id: str
+    ip: str
+    spent: bool
+    useragent: str
+    old_ctr: int
+    new_ctr: int
+    amount: int
+    time: int
+
+    @classmethod
+    def from_row(cls, row: Row) -> "Hit":
+        return cls(**dict(row))
+
+
+class Refund(BaseModel):
+    id: str
+    hit_id: str
+    refund_amount: int
+    time: int
+
+    @classmethod
+    def from_row(cls, row: Row) -> "Refund":
+        return cls(**dict(row))