Nut07/proof pending (#277)

* add pending state

* proofs spendable check and tests

* bump version to 0.12.3

* remove sleep for testing

* comment clarify

* use list comprehension in pending list

tests/test_mint_api.py

@@ -1,9 +1,11 @@
 import asyncio
+import json
 
 import pytest
 import pytest_asyncio
 import requests
 
+from cashu.core.base import CheckSpendableRequest, CheckSpendableResponse, Proof
 from cashu.core.settings import settings
 from tests.conftest import ledger
 
@@ -54,3 +56,22 @@ async def test_api_mint_validation(ledger):
     assert "error" in response.json()
     response = requests.get(f"{BASE_URL}/mint?amount=1")
     assert "error" not in response.json()
+
+
+@pytest.mark.asyncio
+async def test_api_check_state(ledger):
+    proofs = [
+        Proof(id="1234", amount=0, secret="asdasdasd", C="asdasdasd"),
+        Proof(id="1234", amount=0, secret="asdasdasd1", C="asdasdasd1"),
+    ]
+    payload = CheckSpendableRequest(proofs=proofs)
+    response = requests.post(
+        f"{BASE_URL}/check",
+        data=payload.json(),
+    )
+    assert response.status_code == 200, f"{response.url} {response.status_code}"
+    states = CheckSpendableResponse.parse_obj(response.json())
+    assert states.spendable
+    assert len(states.spendable) == 2
+    assert states.pending
+    assert len(states.pending) == 2