NUT-04: add description (#613)

* NUT-04: add description

* skip test for deprecated api

* fix for lndgrpc

* add test for cli

* add two random tests

* add max length to request model validator

* skip cli test with description for deprecated api

* add cli test for invoice command

* default value to None

cashu/wallet/v1_api.py

@@ -283,11 +283,15 @@ class LedgerAPI(LedgerAPIDeprecated, object):
 
     @async_set_httpx_client
     @async_ensure_mint_loaded
-    async def mint_quote(self, amount: int, unit: Unit) -> PostMintQuoteResponse:
+    async def mint_quote(
+        self, amount: int, unit: Unit, memo: Optional[str] = None
+    ) -> PostMintQuoteResponse:
         """Requests a mint quote from the server and returns a payment request.
 
         Args:
             amount (int): Amount of tokens to mint
+            unit (Unit): Unit of the amount
+            memo (Optional[str], optional): Memo to attach to Lightning invoice. Defaults to None.
 
         Returns:
             PostMintQuoteResponse: Mint Quote Response
@@ -296,7 +300,7 @@ class LedgerAPI(LedgerAPIDeprecated, object):
             Exception: If the mint request fails
         """
         logger.trace("Requesting mint: POST /v1/mint/bolt11")
-        payload = PostMintQuoteRequest(unit=unit.name, amount=amount)
+        payload = PostMintQuoteRequest(unit=unit.name, amount=amount, description=memo)
         resp = await self.httpx.post(
             join(self.url, "/v1/mint/quote/bolt11"), json=payload.dict()
         )