From 71580a5e60a6eb9cc2b0e470f5b3ae9b926dd212 Mon Sep 17 00:00:00 2001
From: callebtc <93376500+callebtc@users.noreply.github.com>
Date: Wed, 17 Jul 2024 11:48:40 +0200
Subject: [PATCH] Fix parsing of old format contact field in wallet (#589)

* wallet parse contact field if its old format

* default checks for contacts
---
 cashu/core/models.py   | 17 ++++++++++++++++-
 cashu/core/settings.py |  2 +-
 cashu/mint/router.py   |  4 +++-
 3 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/cashu/core/models.py b/cashu/core/models.py
index eff5817..065c6a3 100644
--- a/cashu/core/models.py
+++ b/cashu/core/models.py
@@ -1,6 +1,6 @@
 from typing import Any, Dict, List, Optional, Union
 
-from pydantic import BaseModel, Field
+from pydantic import BaseModel, Field, root_validator
 
 from .base import (
     BlindedMessage,
@@ -43,6 +43,21 @@ class GetInfoResponse(BaseModel):
     def supports(self, nut: int) -> Optional[bool]:
         return nut in self.nuts if self.nuts else None
 
+    # BEGIN DEPRECATED: NUT-06 contact field change
+    # NUT-06 PR: https://github.com/cashubtc/nuts/pull/117
+    @root_validator(pre=True)
+    def preprocess_deprecated_contact_field(cls, values):
+        if "contact" in values and values["contact"]:
+            if isinstance(values["contact"][0], list):
+                values["contact"] = [
+                    MintInfoContact(method=method, info=info)
+                    for method, info in values["contact"]
+                    if method and info
+                ]
+        return values
+
+    # END DEPRECATED: NUT-06 contact field change
+
 
 class Nut15MppSupport(BaseModel):
     method: str
diff --git a/cashu/core/settings.py b/cashu/core/settings.py
index 00ae25b..1c012ad 100644
--- a/cashu/core/settings.py
+++ b/cashu/core/settings.py
@@ -142,7 +142,7 @@ class MintInformation(CashuSettings):
     mint_info_name: str = Field(default="Cashu mint")
     mint_info_description: str = Field(default=None)
     mint_info_description_long: str = Field(default=None)
-    mint_info_contact: List[List[str]] = Field(default=[["", ""]])
+    mint_info_contact: List[List[str]] = Field(default=[])
     mint_info_motd: str = Field(default=None)
 
 
diff --git a/cashu/mint/router.py b/cashu/mint/router.py
index 9e54f63..56226f3 100644
--- a/cashu/mint/router.py
+++ b/cashu/mint/router.py
@@ -43,7 +43,9 @@ async def info() -> GetInfoResponse:
     logger.trace("> GET /v1/info")
     mint_features = ledger.mint_features()
     contact_info = [
-        MintInfoContact(method=m, info=i) for m, i in settings.mint_info_contact
+        MintInfoContact(method=m, info=i)
+        for m, i in settings.mint_info_contact
+        if m and i
     ]
     return GetInfoResponse(
         name=settings.mint_info_name,