Tests: mint operations (#328)

* mint operations

* fix spelling

* add pending test

* fix tag

* make htlc tests less likelyto fail

tests/test_mint_operations.py

@@ -0,0 +1,64 @@
+import pytest
+import pytest_asyncio
+
+from cashu.mint.ledger import Ledger
+from cashu.wallet.wallet import Wallet
+from cashu.wallet.wallet import Wallet as Wallet1
+from tests.conftest import SERVER_ENDPOINT
+
+
+@pytest_asyncio.fixture(scope="function")
+async def wallet1(mint):
+    wallet1 = await Wallet1.with_db(
+        url=SERVER_ENDPOINT,
+        db="test_data/wallet1",
+        name="wallet1",
+    )
+    await wallet1.load_mint()
+    wallet1.status()
+    yield wallet1
+
+
+@pytest.mark.asyncio
+async def test_melt(wallet1: Wallet, ledger: Ledger):
+    # mint twice so we have enough to pay the second invoice back
+    invoice = await wallet1.request_mint(64)
+    await wallet1.mint(64, hash=invoice.hash)
+    invoice = await wallet1.request_mint(64)
+    await wallet1.mint(64, hash=invoice.hash)
+    assert wallet1.balance == 128
+    total_amount, fee_reserve_sat = await wallet1.get_pay_amount_with_fees(invoice.pr)
+    mint_fees = await ledger.get_melt_fees(invoice.pr)
+    assert mint_fees == fee_reserve_sat
+
+    keep_proofs, send_proofs = await wallet1.split_to_send(wallet1.proofs, total_amount)
+
+    await ledger.melt(send_proofs, invoice.pr, outputs=None)
+
+
+@pytest.mark.asyncio
+async def test_split(wallet1: Wallet, ledger: Ledger):
+    invoice = await wallet1.request_mint(64)
+    await wallet1.mint(64, hash=invoice.hash)
+
+    keep_proofs, send_proofs = await wallet1.split_to_send(wallet1.proofs, 10)
+    secrets, rs, derivation_paths = await wallet1.generate_n_secrets(len(send_proofs))
+    outputs, rs = wallet1._construct_outputs(
+        [p.amount for p in send_proofs], secrets, rs
+    )
+
+    promises = await ledger.split(proofs=send_proofs, outputs=outputs)
+    assert len(promises) == len(outputs)
+    assert [p.amount for p in promises] == [p.amount for p in outputs]
+
+
+@pytest.mark.asyncio
+async def test_check_proof_state(wallet1: Wallet, ledger: Ledger):
+    invoice = await wallet1.request_mint(64)
+    await wallet1.mint(64, hash=invoice.hash)
+
+    keep_proofs, send_proofs = await wallet1.split_to_send(wallet1.proofs, 10)
+
+    spendable, pending = await ledger.check_proof_state(proofs=send_proofs)
+    assert sum(spendable) == len(send_proofs)
+    assert sum(pending) == 0