From dc6378eda6bda0b40093d2401f7d14f5aa59c04a Mon Sep 17 00:00:00 2001 From: Kayos Date: Thu, 23 Apr 2026 18:04:00 -0700 Subject: [PATCH] v0.1.0-dev: initial extraction from TradeCraft + new abstractions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sulkta Coop's Python SDK for merchant-side Cardano payments + NFT certificate-of-authenticity minting. Zero-custody by design. Extracted from TradeCraft's services/cardano_*.py (2,400+ lines of production Cardano-mainnet code) and restructured as an installable Python package. Package layout (cardano_checkout/): - addresses.py — lifted verbatim: CIP-1852 HD derivation, pure pycardano - oracles.py — lifted from cardano_price.py: Koios ADA/USD feed w/ 5m cache - monitor.py — lifted verbatim (SQLAlchemy-coupled; v0.2 refactors to Store) - scheduler.py — lifted verbatim (same refactor note) - invoice.py — NEW: framework-agnostic Invoice dataclass + lifecycle enum - store.py — NEW: InvoiceStore Protocol for pluggable persistence - mint.py — NEW: CIP-25 v2 metadata builder (works); tx submission stub for v0.2 - ipfs.py — NEW: kubo HTTP client with primary-pin + mirror-pin pattern - txbuild.py — NEW: v0.2 stub for PyCardano / Ogmios tx construction Design: - Consumers provide xpub + InvoiceStore impl. SDK provides everything else. - IPFS: local kubo for upload + serve, optional mirror pins for archival. Chromaticcraft pattern: Rackham kubo primary, Lucy kubo mirror. - NFT: single native-script policy per merchant studio (CIP-25 v2, not CIP-68 — full wallet coverage, no mutability needed for static certs). Policy skey stays under Sulkta cold-custody (Lucy pattern); signing is an external hand-off like ADAMaps payouts. Tests: pure-module smoke tests pass for invoice, store-protocol, CIP-25 metadata envelope, IPFS client import, txbuild stub module. Address derivation tests ship but require pycardano + will exercise in CI. LICENSE: Apache-2.0 (matches upstream Cardano tooling). Next (v0.2 scope): - Refactor monitor + scheduler around InvoiceStore (drop SQLAlchemy coupling) - Wire mint.mint_nft_cert to PyCardano + local Ogmios on Rackham - txbuild: Ogmios chain-context + cold-signer hand-off shape - chromaticcraft Phase 2 imports the SDK as its first external consumer --- .gitignore | 11 + LICENSE | 201 +++++++++++++++ README.md | 134 ++++++++++ cardano_checkout/__init__.py | 48 ++++ cardano_checkout/addresses.py | 218 ++++++++++++++++ cardano_checkout/invoice.py | 102 ++++++++ cardano_checkout/ipfs.py | 107 ++++++++ cardano_checkout/mint.py | 156 ++++++++++++ cardano_checkout/monitor.py | 317 +++++++++++++++++++++++ cardano_checkout/oracles.py | 346 +++++++++++++++++++++++++ cardano_checkout/scheduler.py | 465 ++++++++++++++++++++++++++++++++++ cardano_checkout/store.py | 69 +++++ cardano_checkout/txbuild.py | 38 +++ pyproject.toml | 47 ++++ tests/test_addresses.py | 65 +++++ tests/test_cip25_metadata.py | 56 ++++ tests/test_invoice.py | 49 ++++ 17 files changed, 2429 insertions(+) create mode 100644 .gitignore create mode 100644 LICENSE create mode 100644 README.md create mode 100644 cardano_checkout/__init__.py create mode 100644 cardano_checkout/addresses.py create mode 100644 cardano_checkout/invoice.py create mode 100644 cardano_checkout/ipfs.py create mode 100644 cardano_checkout/mint.py create mode 100644 cardano_checkout/monitor.py create mode 100644 cardano_checkout/oracles.py create mode 100644 cardano_checkout/scheduler.py create mode 100644 cardano_checkout/store.py create mode 100644 cardano_checkout/txbuild.py create mode 100644 pyproject.toml create mode 100644 tests/test_addresses.py create mode 100644 tests/test_cip25_metadata.py create mode 100644 tests/test_invoice.py diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..86f84f4 --- /dev/null +++ b/.gitignore @@ -0,0 +1,11 @@ +__pycache__/ +*.py[cod] +*.egg-info/ +*.egg +.pytest_cache/ +.mypy_cache/ +.ruff_cache/ +build/ +dist/ +.venv/ +.env diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..34c43df --- /dev/null +++ b/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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See the License for the specific language governing + permissions and limitations under the License. diff --git a/README.md b/README.md new file mode 100644 index 0000000..41e12f6 --- /dev/null +++ b/README.md @@ -0,0 +1,134 @@ +# cardano-checkout + +Python SDK for merchant-side Cardano payments + NFT certificate-of-authenticity minting. + +**Zero-custody by design:** the merchant provides a wallet xpub. The SDK derives +unique receive addresses per invoice, polls the chain for payment, and optionally +mints a CIP-25 NFT cert on confirmation. The platform never holds or moves funds. + +Extracted from [TradeCraft](http://192.168.0.5:3001/TradeCraft/tradecraft)'s +`services/cardano_*.py` modules (2,400+ lines of production code running on the +Cardano mainnet) and packaged for reuse across the Sulkta Coop product family. + +## Status + +**v0.1.0-dev — alpha extraction.** Pure modules lifted verbatim from TradeCraft. +DB-coupled modules (monitor, scheduler) ship with a `TODO: refactor to Store +protocol` marker — they work as-is when paired with TradeCraft's SQLAlchemy models +but will be refactored to the generic `InvoiceStore` Protocol in v0.2. + +| Module | Status | Notes | +|---|---|---| +| `addresses` | ✅ stable | CIP-1852 HD derivation; pure pycardano | +| `oracles` | ✅ stable | ADA/USD price via Koios with 5-min cache | +| `invoice` + `store` | ✅ new | Framework-agnostic invoice + persistence Protocol | +| `mint` | ⏳ stub | CIP-25 v2 metadata builder works; tx submission in v0.2 | +| `ipfs` | ✅ working | kubo HTTP API client w/ optional mirror-pin | +| `monitor` | 🟡 SQLAlchemy-coupled | v0.2 target: refactor around `InvoiceStore` | +| `scheduler` | 🟡 SQLAlchemy-coupled | v0.2 target: same | +| `txbuild` | ❌ v0.2 | Full PyCardano tx construction via Ogmios | + +## Design + +``` + ┌────────────────────────────────────────────────────────┐ + │ Merchant App │ + │ (TradeCraft / chromaticcraft / your-product) │ + └──────────────┬───────────────────────┬─────────────────┘ + │ │ + uses │ implements │ imports + ▼ ▼ + ┌──────────────┐ ┌────────────────────────┐ + │ InvoiceStore │ ◄────── │ cardano_checkout SDK │ + │ (your DB) │ │ │ + └──────────────┘ │ addresses ← pure │ + │ oracles ← pure │ + │ invoice ← dataclass │ + │ monitor ← polls chain │ + │ scheduler ← bg loop │ + │ mint ← NFT cert │ + │ ipfs ← upload │ + │ txbuild ← PyCardano wrappers │ + └────────────────────────┘ + │ + talks to │ + ▼ + ┌────────────────────────┐ + │ Koios + Ogmios + kubo │ + └────────────────────────┘ +``` + +The merchant app provides: +1. A wallet xpub (account-level extended public key). +2. An `InvoiceStore` implementation (SQLAlchemy, Postgres, SQLite, in-memory — whatever). + +The SDK provides: +1. Address derivation from the xpub. +2. Per-invoice payment monitoring against Koios. +3. ADA ↔ USD price conversion. +4. CIP-25 v2 NFT cert minting (v0.2). +5. IPFS upload + pinning for NFT image metadata. + +## Quick start + +```python +import asyncio +from cardano_checkout import addresses, oracles + +# Derive a receive address for invoice #42 +addr = addresses.derive_address( + xpub_hex="", + index=42, + network="mainnet", +) + +# Convert a USD price to lovelace at current market +async def main() -> None: + lovelace = await oracles.convert_usd_to_lovelace(99.00) + ada = lovelace / 1_000_000 + print(f"Customer owes {ada:.4f} ADA for $99") + +asyncio.run(main()) +``` + +## IPFS: bake-then-mirror pattern + +The SDK's `IPFSClient` expects a local kubo daemon (typically in the same +Docker image as the web app) for upload and primary pin, and takes an +optional list of mirror endpoints to `pin add` the CID on a second node +for archival redundancy. + +Typical chromaticcraft deployment: + +```python +from cardano_checkout import ipfs + +client = ipfs.IPFSClient( + api_url="http://127.0.0.1:5001", # local kubo in the same container + mirror_api_urls=["http://192.168.254.5:5001"], # Lucy's kubo over the LAN/VPN +) + +cid = await client.add(photo_bytes, filename="order-0001.jpg") +# Image now served by Rackham (low latency) AND pinned on Lucy (durability) +``` + +## NFT cert-of-authenticity design + +One minting policy per merchant studio. Policy is a native script (no Plutus +required), optionally time-locked to make "no more editions after X" a +cryptographically verifiable claim. + +CIP-25 v2 metadata. Single NFT per order. Policy skey never leaves the custody +host (Lucy in Sulkta's pattern). The SDK builds the metadata envelope + tx; +external signer does the signature. + +## Installation + +``` +pip install 'cardano-checkout[sqlalchemy]' # if you're using SQLAlchemy +pip install cardano-checkout # core only +``` + +## License + +Apache-2.0 — matches upstream Cardano tooling. diff --git a/cardano_checkout/__init__.py b/cardano_checkout/__init__.py new file mode 100644 index 0000000..5a7692b --- /dev/null +++ b/cardano_checkout/__init__.py @@ -0,0 +1,48 @@ +"""cardano_checkout — Python SDK for merchant-side Cardano payments + NFT cert minting. + +Zero-custody by design: consumers provide a wallet xpub (account-level +extended public key). The SDK derives unique receive addresses per +invoice, polls the chain for payment, and (optionally) mints a CIP-25 +NFT certificate of authenticity on confirmation. + +Quick start:: + + from cardano_checkout import addresses, oracles + + addr = addresses.derive_address(xpub_hex, index=42, network="mainnet") + price = await oracles.get_ada_usd_price() + lovelace = await oracles.convert_usd_to_lovelace(99.00) + +For full invoice lifecycle see :mod:`cardano_checkout.invoice` + +:mod:`cardano_checkout.store` (Protocol-based persistence). + +For NFT minting see :mod:`cardano_checkout.mint`. +""" + +from __future__ import annotations + +__version__ = "0.1.0-dev" + +# Pure modules — stable API from extraction +from cardano_checkout import addresses, oracles # noqa: F401 + +# Payment lifecycle +from cardano_checkout.invoice import Invoice, InvoiceStatus # noqa: F401 +from cardano_checkout.store import InvoiceStore # noqa: F401 + +# NFT + IPFS +from cardano_checkout.mint import MintPolicy, mint_nft_cert # noqa: F401 +from cardano_checkout.ipfs import IPFSClient, pin_bytes # noqa: F401 + +__all__ = [ + "__version__", + "addresses", + "oracles", + "Invoice", + "InvoiceStatus", + "InvoiceStore", + "MintPolicy", + "mint_nft_cert", + "IPFSClient", + "pin_bytes", +] diff --git a/cardano_checkout/addresses.py b/cardano_checkout/addresses.py new file mode 100644 index 0000000..91bf4ca --- /dev/null +++ b/cardano_checkout/addresses.py @@ -0,0 +1,218 @@ +""" +Cardano HD address derivation service. + +Derives Cardano base addresses from an account-level extended public key (xpub) +exported from wallets such as Eternl or Lace. Uses BIP-44 derivation via pycardano. + +Key derivation path: m / 1852' / 1815' / account' / chain / index + - chain 0 = external (receive) addresses + - chain 2 = staking key (always index 0 for the account) + +The xpub accepted here is the *account* public key — the root has already been +hardened away by the wallet. We only perform soft derivation from account level +down, so no private key material is ever needed or touched. +""" +import logging +from typing import Optional + +logger = logging.getLogger(__name__) + +# --------------------------------------------------------------------------- +# Public API +# --------------------------------------------------------------------------- + + +def derive_address(xpub_hex: str, index: int, network: str = "mainnet") -> str: + """ + Derive a Cardano base address at the given receive-address index. + + The address is a Shelley-era base address combining: + - payment key: account_xpub / 0 (external chain) / index + - staking key: account_xpub / 2 (staking chain) / 0 + + Args: + xpub_hex: Hex-encoded account extended public key (64 bytes raw or + 96 bytes with chain code, as exported by most CIP-1852 wallets). + index: Receive address index (0-based). Must be >= 0. + network: "mainnet" or "testnet" (preprod / preview). Defaults to mainnet. + + Returns: + Bech32-encoded Cardano base address (addr1... or addr_test1...). + + Raises: + ValueError: If xpub_hex is malformed, index is negative, or network is invalid. + RuntimeError: If pycardano is not installed or derivation fails unexpectedly. + """ + _require_pycardano() + + if index < 0: + raise ValueError(f"Address index must be non-negative, got {index}") + + net = _parse_network(network) + acct_pub = _parse_xpub(xpub_hex) + + try: + # External receive chain (0) / address index + addr_pub = acct_pub.derive(0).derive(index) + # Staking chain (2) / always index 0 for the account + stake_pub = acct_pub.derive(2).derive(0) + except Exception as exc: + logger.exception("[cardano] Key derivation failed at index %d", index) + raise RuntimeError(f"Key derivation failed: {exc}") from exc + + from pycardano import Address + + address = Address( + payment_part=addr_pub.hash(), + staking_part=stake_pub.hash(), + network=net, + ) + + return str(address) + + +def validate_xpub(xpub_hex: str) -> bool: + """ + Validate that an xpub string is well-formed and parseable. + + Checks: + - Is a non-empty string + - Is valid hex + - Is a valid pycardano HDPublicKey (correct byte length, valid point on curve) + + Args: + xpub_hex: Hex-encoded account extended public key. + + Returns: + True if the xpub is valid, False otherwise. Never raises. + """ + if not xpub_hex or not isinstance(xpub_hex, str): + return False + + # Quick hex sanity before paying the crypto cost + stripped = xpub_hex.strip() + if not _is_hex(stripped): + return False + + try: + _require_pycardano() + _parse_xpub(stripped) + return True + except Exception: + return False + + +def get_address_preview(xpub_hex: str, network: str = "mainnet") -> str: + """ + Derive the address at index 0 for settings UI preview. + + Thin wrapper around derive_address — exists so callers don't have to + know or care about the index convention. + + Args: + xpub_hex: Hex-encoded account extended public key. + network: "mainnet" or "testnet". Defaults to mainnet. + + Returns: + Bech32-encoded Cardano base address at index 0. + + Raises: + ValueError: If xpub_hex is malformed or network is invalid. + RuntimeError: If derivation fails unexpectedly. + """ + return derive_address(xpub_hex, index=0, network=network) + + +# --------------------------------------------------------------------------- +# Internal helpers +# --------------------------------------------------------------------------- + + +def _require_pycardano() -> None: + """Raise a clear RuntimeError if pycardano is not installed.""" + try: + import pycardano # noqa: F401 + except ImportError as exc: + raise RuntimeError( + "pycardano is required for Cardano address derivation. " + "Add pycardano>=0.11.0 to requirements.txt and reinstall." + ) from exc + + +def _parse_network(network: str): + """ + Parse a network string into a pycardano Network enum value. + + Args: + network: "mainnet" or "testnet". + + Returns: + pycardano.Network enum member. + + Raises: + ValueError: If network is not one of the accepted values. + """ + from pycardano import Network + + if network == "mainnet": + return Network.MAINNET + if network == "testnet": + return Network.TESTNET + raise ValueError( + f"Invalid network '{network}'. Expected 'mainnet' or 'testnet'." + ) + + +def _parse_xpub(xpub_hex: str): + """ + Parse a hex-encoded extended public key into an HDPublicKey. + + pycardano's HDPublicKey.from_primitive expects 64 raw bytes + (32-byte Ed25519 public key + 32-byte chain code). Some wallets + export 96 bytes; if so, we strip the trailing 32 bytes which are + the public key repeated. + + Args: + xpub_hex: Hex-encoded extended public key string. + + Returns: + pycardano.HDPublicKey instance. + + Raises: + ValueError: If the byte length is unexpected or the key is invalid. + """ + from pycardano import HDPublicKey + + try: + raw = bytes.fromhex(xpub_hex.strip()) + except ValueError as exc: + raise ValueError(f"xpub_hex is not valid hex: {exc}") from exc + + # Standard CIP-1852 account xpub is 64 bytes (pubkey || chain_code). + # Some export formats prepend 32 zeroed or duplicated bytes — handle both. + if len(raw) == 64: + pass # Expected format + elif len(raw) == 96: + # Strip the first 32 bytes (typically a duplicate or empty prefix) + raw = raw[32:] + else: + raise ValueError( + f"Unexpected xpub length: {len(raw)} bytes. " + "Expected 64 bytes (pubkey + chain_code)." + ) + + try: + return HDPublicKey.from_primitive(raw) + except Exception as exc: + raise ValueError(f"xpub is not a valid extended public key: {exc}") from exc + + +def _is_hex(value: str) -> bool: + """Return True if every character in value is a valid hex digit.""" + if not value: + return False + try: + bytes.fromhex(value) + return True + except ValueError: + return False diff --git a/cardano_checkout/invoice.py b/cardano_checkout/invoice.py new file mode 100644 index 0000000..9b51a97 --- /dev/null +++ b/cardano_checkout/invoice.py @@ -0,0 +1,102 @@ +"""Invoice state machine for Cardano-native merchant payments. + +An Invoice represents one payment intent: a unique receive address +derived from the merchant's xpub, an expected amount in lovelace, a +USD-denominated label, and a lifecycle state that transitions as the +chain confirms payment. + +The Invoice is deliberately framework-agnostic — persistence is +delegated to an :class:`InvoiceStore` (see :mod:`cardano_checkout.store`). +""" + +from __future__ import annotations + +from dataclasses import dataclass, field +from datetime import datetime, timezone +from enum import Enum +from typing import Optional + + +class InvoiceStatus(str, Enum): + """Lifecycle states for a Cardano checkout invoice. + + Valid transitions:: + + PENDING ──► MATCHED ──► CONFIRMED + │ │ + │ └──► UNDERPAID + │ └──► OVERPAID (still moves to CONFIRMED but flagged) + │ + ├──► EXPIRED (no payment within window) + └──► CANCELLED (merchant-initiated) + + CONFIRMED is terminal success; EXPIRED / CANCELLED are terminal failures. + UNDERPAID is recoverable if the customer sends the delta. + """ + + PENDING = "pending" + MATCHED = "matched" # at least one UTxO landed, not yet k-confirmed + CONFIRMED = "confirmed" # enough confirmations, payment final + UNDERPAID = "underpaid" # delta < expected by more than tolerance + OVERPAID = "overpaid" # delta > expected by more than tolerance (non-fatal) + EXPIRED = "expired" + CANCELLED = "cancelled" + + +@dataclass +class Invoice: + """One Cardano payment intent. + + Attributes: + id: Stable per-merchant identifier (UUID or monotonic; caller's choice). + merchant_id: Opaque merchant namespace — the SDK never interprets it. + derivation_index: BIP-44 receive-chain index used to derive receive_address. + receive_address: Bech32 address the customer pays to. Derived from the + merchant's xpub at ``derivation_index``. + expected_lovelace: Target amount. Set at creation time from the USD ↔ ADA + oracle snapshot; does NOT float with market price once set. + usd_amount: Human-readable label for what the customer owes. + status: Current lifecycle state. See :class:`InvoiceStatus`. + created_at: UTC timestamp when the invoice was created. + expires_at: UTC timestamp when this invoice stops accepting payment. + Typically created_at + 15 minutes for live-price quotes. + tx_hashes: All observed inbound tx hashes. Empty until first UTxO lands. + received_lovelace: Sum of inbound UTxOs at ``receive_address``. + confirmed_at: UTC timestamp when status became CONFIRMED. + metadata: Arbitrary merchant-defined payload (order id, sku, etc.). + """ + + id: str + merchant_id: str + derivation_index: int + receive_address: str + expected_lovelace: int + usd_amount: float + status: InvoiceStatus = InvoiceStatus.PENDING + created_at: datetime = field(default_factory=lambda: datetime.now(timezone.utc)) + expires_at: Optional[datetime] = None + tx_hashes: list[str] = field(default_factory=list) + received_lovelace: int = 0 + confirmed_at: Optional[datetime] = None + metadata: dict = field(default_factory=dict) + + @property + def ada_amount(self) -> float: + """Expected amount in ADA (lovelace / 1_000_000).""" + return self.expected_lovelace / 1_000_000 + + @property + def is_terminal(self) -> bool: + """True if the invoice has reached a state it can't leave.""" + return self.status in { + InvoiceStatus.CONFIRMED, + InvoiceStatus.EXPIRED, + InvoiceStatus.CANCELLED, + } + + def is_expired(self, now: Optional[datetime] = None) -> bool: + """True if wall-clock is past expires_at and status is still PENDING.""" + if self.expires_at is None: + return False + current = now or datetime.now(timezone.utc) + return current >= self.expires_at and self.status == InvoiceStatus.PENDING diff --git a/cardano_checkout/ipfs.py b/cardano_checkout/ipfs.py new file mode 100644 index 0000000..79a5e31 --- /dev/null +++ b/cardano_checkout/ipfs.py @@ -0,0 +1,107 @@ +"""Minimal IPFS client — upload + pin via kubo's HTTP API. + +Designed for the ``chromaticcraft`` shape: a small local kubo daemon +runs alongside the web app, accepts uploads from end users (e.g. Abby +uploading a photo of a finished custom order), pins locally for fast +serving, and optionally mirrors pins to a second remote node +(Lucy-on-LAN) for archival redundancy. + +No IPFS libraries are imported — just httpx against the kubo REST API +(v0). Keeps the SDK surface minimal. +""" + +from __future__ import annotations + +import logging +from dataclasses import dataclass +from typing import Optional + +import httpx + +logger = logging.getLogger(__name__) + + +@dataclass +class IPFSClient: + """Kubo-compatible IPFS client. + + Attributes: + api_url: Base URL of the kubo HTTP API (default ``http://127.0.0.1:5001``). + timeout: Per-request timeout in seconds (default 60 — uploads can be slow). + mirror_api_urls: Optional list of additional kubo endpoints to + ``pin add`` the CID on after a successful primary pin. Use this + to mirror to Lucy or any other archival node. + """ + + api_url: str = "http://127.0.0.1:5001" + timeout: float = 60.0 + mirror_api_urls: list[str] = None # type: ignore[assignment] + + def __post_init__(self) -> None: + if self.mirror_api_urls is None: + self.mirror_api_urls = [] + + async def add(self, data: bytes, filename: str = "upload") -> str: + """Upload bytes and pin them locally. + + Args: + data: Raw bytes to add. + filename: Logical name used by clients browsing the DAG + (doesn't affect the CID). + + Returns: + CID (base58, v0 or base32 v1 depending on kubo defaults). + + Raises: + RuntimeError: If the daemon is unreachable or returns a non-2xx. + """ + url = f"{self.api_url.rstrip('/')}/api/v0/add" + async with httpx.AsyncClient(timeout=self.timeout) as client: + resp = await client.post( + url, + files={"file": (filename, data, "application/octet-stream")}, + params={"pin": "true", "cid-version": "1"}, + ) + if resp.status_code >= 400: + raise RuntimeError(f"ipfs add {resp.status_code}: {resp.text[:200]}") + # kubo's /add streams NDJSON; each line is one {Name, Hash, Size}. + # For a single file upload the last line carries the wrapping CID. + last_cid: Optional[str] = None + for line in resp.text.strip().splitlines(): + if '"Hash"' in line: + import json + obj = json.loads(line) + last_cid = obj.get("Hash") + if not last_cid: + raise RuntimeError(f"ipfs add: no CID in response: {resp.text[:200]}") + + # Mirror pins (best effort — a mirror failure should not poison the primary upload). + for mirror in self.mirror_api_urls: + try: + await self._pin_on(mirror, last_cid) + except Exception as exc: + logger.warning("[ipfs] mirror pin to %s failed for %s: %s", mirror, last_cid, exc) + + return last_cid + + async def _pin_on(self, api_url: str, cid: str) -> None: + """Pin an existing CID on a remote kubo node.""" + url = f"{api_url.rstrip('/')}/api/v0/pin/add" + async with httpx.AsyncClient(timeout=self.timeout) as client: + resp = await client.post(url, params={"arg": cid}) + if resp.status_code >= 400: + raise RuntimeError(f"pin/add {resp.status_code}: {resp.text[:200]}") + + +async def pin_bytes( + data: bytes, + api_url: str = "http://127.0.0.1:5001", + mirror_api_urls: Optional[list[str]] = None, + filename: str = "upload", +) -> str: + """Convenience wrapper: one-shot upload + pin (+ optional mirror). + + Returns the CID. + """ + client = IPFSClient(api_url=api_url, mirror_api_urls=mirror_api_urls or []) + return await client.add(data, filename=filename) diff --git a/cardano_checkout/mint.py b/cardano_checkout/mint.py new file mode 100644 index 0000000..aca607c --- /dev/null +++ b/cardano_checkout/mint.py @@ -0,0 +1,156 @@ +"""CIP-25 v2 NFT certificate-of-authenticity minting. + +This module produces the NFT cert attached to a confirmed merchant +order. One NFT per order, pinned-once metadata (image CID from IPFS +via :mod:`cardano_checkout.ipfs`), sent directly to the customer's +wallet in the same transaction. + +Design decisions: + +- **CIP-25 v2** (not CIP-68). CIP-25 is universally supported by + every Cardano wallet (Eternl, Lace, Yoroi, Vespr, Typhon). CIP-68 + adds reference-NFT mutability we do not need for a static cert. +- **Single policy per merchant studio.** All of a studio's certs share + one policy_id so wallets group them cleanly. The policy key is a + native script under the studio's custody — Sulkta pattern is a + multi-sig native script stored on Lucy. +- **Policy has a time-lock** (invalid-after slot) so the "no more + editions can be minted after X" claim is cryptographically enforceable. + Recommended: generous lock (100 years) so policy_id stays stable, + but revokable in-contract via ``mint policy revoke`` flow. +- **No reference script, no Plutus.** Pure native scripts + standard + CIP-25 metadata keeps the tx cheap (~0.18 ADA fee + min-utxo for the + NFT output). + +v0.1.0 ships the signature + stub. Full tx construction against a local +Ogmios endpoint lands in v0.2 once the store + monitor integration +tests pass. +""" + +from __future__ import annotations + +from dataclasses import dataclass, field +from typing import Optional + + +@dataclass +class MintPolicy: + """A native-script minting policy under the SDK's custody model. + + Attributes: + policy_id: Hex blake2b-224 hash of the native script CBOR. Stable + for the life of the policy — shipped with every cert minted + under it. Becomes the Cardano ``policy_id`` of the NFT asset. + script_cbor_hex: Hex-encoded CBOR of the native script itself. + Submitted alongside the mint tx witness. + signing_keys: Paths to skey files needed to sign the tx (all of + them, for an all-of multi-sig). The SDK does not read these — + callers pass them to :mod:`cardano_checkout.txbuild` which + coordinates with an external signer (Lucy cold-store pattern). + locked_after_slot: Optional slot beyond which the policy rejects + further mints. None = no time lock (not recommended for + certificates — a lock makes the "no more editions" claim + mathematically verifiable). + """ + + policy_id: str + script_cbor_hex: str + signing_keys: list[str] = field(default_factory=list) + locked_after_slot: Optional[int] = None + + +async def mint_nft_cert( + policy: MintPolicy, + asset_name: str, + metadata: dict, + recipient_address: str, + ogmios_url: str = "http://127.0.0.1:1337", + network: str = "mainnet", +) -> str: + """Mint a CIP-25 v2 NFT cert and send it to the recipient. + + Constructs a transaction that: + 1. Mints exactly 1 of ``{policy.policy_id}.{asset_name}``. + 2. Sends that single token to ``recipient_address`` in its own UTxO. + 3. Attaches CIP-25 v2 metadata under metadatum label 721. + 4. Witnesses with all signing keys required by the policy. + + Args: + policy: Merchant's minting policy. + asset_name: UTF-8 asset name (will be hex-encoded per CIP-25). Max 32 bytes. + metadata: CIP-25 metadata dict. At minimum should include ``name``, + ``image`` (ipfs://CID), ``mediaType``, and any studio-specific + properties. The SDK wraps this into the proper ``{721: {policy_id: {asset_name: ...}}}`` + envelope automatically. + recipient_address: Bech32 address of the wallet that receives the NFT. + ogmios_url: Endpoint for chain queries + tx submission. + network: "mainnet" or "testnet". + + Returns: + Transaction hash (hex) once successfully submitted. + + Raises: + NotImplementedError: v0.1.0 stub. Full implementation lands in v0.2. + """ + # v0.1.0 surface lock — implementation lands in v0.2 alongside txbuild.py + raise NotImplementedError( + "mint_nft_cert is stubbed in v0.1.0. Use cardano-cli or PyCardano " + "directly until v0.2 ships the full Ogmios-backed mint path." + ) + + +def build_cip25_metadata( + policy_id: str, + asset_name: str, + name: str, + image_cid: str, + description: str = "", + media_type: str = "image/jpeg", + properties: Optional[dict] = None, +) -> dict: + """Assemble the ``{721: {...}}`` metadatum envelope for a single NFT. + + CIP-25 v2 image field takes an ``ipfs://`` URI. Description, if + longer than 64 characters, is split into an array of ≤64-char chunks + (CIP-25 constraint from the Cardano metadata schema — strings larger + than 64 chars are encoded as a list of chunks). + + Args: + policy_id: Hex policy id (same as on the asset). + asset_name: UTF-8 asset name — used as the dict key under policy_id. + name: Human-readable NFT title (shown in wallets). + image_cid: IPFS CID — the function prepends ``ipfs://``. + description: Optional longer text. Will be chunked if > 64 chars. + media_type: MIME type of the image. Default ``image/jpeg``. + properties: Additional key/value pairs merged into the metadata blob. + + Returns: + Dict ready to submit as tx metadatum label 721. + """ + def chunk64(s: str) -> list[str]: + if len(s) <= 64: + return [s] + return [s[i : i + 64] for i in range(0, len(s), 64)] + + desc: object = description + if isinstance(description, str) and len(description) > 64: + desc = chunk64(description) + + body: dict = { + "name": name, + "image": f"ipfs://{image_cid}", + "mediaType": media_type, + } + if desc: + body["description"] = desc + if properties: + body.update(properties) + + return { + "721": { + policy_id: { + asset_name: body, + }, + "version": "2.0", + } + } diff --git a/cardano_checkout/monitor.py b/cardano_checkout/monitor.py new file mode 100644 index 0000000..317ade0 --- /dev/null +++ b/cardano_checkout/monitor.py @@ -0,0 +1,317 @@ +""" +Cardano UTXO Monitoring Service + +Polls Koios API to detect on-chain payments at derived Cardano addresses. +Called by the scheduler every 15 seconds for pending payments, and every +60 seconds to reprice expired payment requests. + +Koios endpoint used: + POST https://api.koios.rest/api/v1/address_utxos + Body: {"_addresses": ["addr1..."]} + +Status flow applied here: + pending -> confirmed (received >= expected * 0.98) + pending -> underpaid (received > 0 but < expected * 0.98) + pending -> overpaid (received >= expected * 1.02 — still confirmed) + pending -> expired (handled by reprice_expired_payments) +""" +import logging +from datetime import datetime, timedelta, timezone +from decimal import Decimal +from typing import Optional + +import httpx +from sqlalchemy import select +from sqlalchemy.ext.asyncio import AsyncSession + +from models import CardanoPayment, Config, PlatformConfig +from services.cardano_price import ( + convert_token_to_lovelace, + get_ada_usd_price, + convert_usd_to_lovelace, + KNOWN_TOKENS, +) + +logger = logging.getLogger(__name__) + +KOIOS_URL = "https://api.koios.rest/api/v1/address_utxos" +KOIOS_TIMEOUT = 15 # seconds + +# Tolerance for confirming payment (2%) +CONFIRM_TOLERANCE = 0.98 +OVERPAY_THRESHOLD = 1.02 + + +# ============================================================================= +# Koios API +# ============================================================================= + +async def _check_address_utxos(address: str) -> list[dict]: + """ + Query Koios for all UTXOs at the given Cardano address. + + Returns a list of UTXO dicts from Koios, or an empty list on error. + Each UTXO has keys: tx_hash, tx_index, value (lovelace), asset_list. + """ + try: + async with httpx.AsyncClient(timeout=KOIOS_TIMEOUT) as client: + resp = await client.post( + KOIOS_URL, + json={"_addresses": [address]}, + headers={"Accept": "application/json"}, + ) + resp.raise_for_status() + data = resp.json() + if not isinstance(data, list): + logger.warning("[cardano-monitor] Unexpected Koios response shape for %s", address[:20]) + return [] + return data + + except httpx.HTTPStatusError as e: + logger.error( + "[cardano-monitor] Koios HTTP %s for %s: %s", + e.response.status_code, address[:20], e.response.text[:200], + ) + return [] + except httpx.TimeoutException: + logger.warning("[cardano-monitor] Koios timeout for address %s", address[:20]) + return [] + except Exception as e: + logger.error("[cardano-monitor] Koios unexpected error for %s: %s", address[:20], e) + return [] + + +# ============================================================================= +# Payment evaluation +# ============================================================================= + +async def _evaluate_payment(payment: CardanoPayment, utxos: list[dict]) -> tuple[str, int, int, dict, Optional[str]]: + """ + Evaluate UTXOs against the expected payment and determine new status. + + Returns: + (new_status, received_lovelace, total_value_lovelace, received_assets, tx_hash) + + Status rules: + - No UTXOs -> "pending" (no change) + - total_value >= expected * OVERPAY_THRESHOLD -> "overpaid" (treated as confirmed) + - total_value >= expected * CONFIRM_TOLERANCE -> "confirmed" + - total_value > 0 but below tolerance -> "underpaid" + """ + if not utxos: + return "pending", 0, 0, {}, None + + raw_lovelace = 0 + received_assets: dict[str, int] = {} + latest_tx_hash: Optional[str] = None + + for utxo in utxos: + # Sum ADA (lovelace) + try: + raw_lovelace += int(utxo.get("value", 0)) + except (ValueError, TypeError): + pass + + # Track latest tx_hash + tx = utxo.get("tx_hash") + if tx: + latest_tx_hash = tx + + # Collect native assets + for asset in utxo.get("asset_list", []) or []: + policy_id = asset.get("policy_id", "") + asset_name = asset.get("asset_name", "") + asset_id = f"{policy_id}.{asset_name}" + try: + qty = int(asset.get("quantity", 0)) + except (ValueError, TypeError): + qty = 0 + if qty > 0: + received_assets[asset_id] = received_assets.get(asset_id, 0) + qty + + # Convert native assets to lovelace equivalent + asset_lovelace = 0 + for asset_id, qty in received_assets.items(): + if "." not in asset_id: + continue + policy_id, asset_name_hex = asset_id.split(".", 1) + + # Find matching known token for decimals + decimals = 0 + for token_info in KNOWN_TOKENS.values(): + if token_info.get("policy_id") == policy_id: + decimals = token_info.get("decimals", 0) + break + + try: + lv = await convert_token_to_lovelace(policy_id, asset_name_hex, qty, decimals) + if lv is not None: + asset_lovelace += lv + except Exception as e: + logger.warning("[cardano-monitor] Failed to convert asset %s to lovelace: %s", asset_id[:20], e) + + total_value = raw_lovelace + asset_lovelace + expected = payment.expected_lovelace or 0 + + if expected == 0: + # Degenerate case — treat any payment as confirmed + new_status = "confirmed" + elif total_value >= expected * OVERPAY_THRESHOLD: + new_status = "overpaid" + elif total_value >= expected * CONFIRM_TOLERANCE: + new_status = "confirmed" + elif total_value > 0: + new_status = "underpaid" + else: + new_status = "pending" + + return new_status, raw_lovelace, total_value, received_assets, latest_tx_hash + + +# ============================================================================= +# Main monitoring functions (called by scheduler) +# ============================================================================= + +async def check_pending_payments(db: AsyncSession) -> None: + """ + Check all pending payments that haven't expired yet. + + Queries Koios for UTXOs at each address. Updates payment status in place. + """ + now = datetime.now(timezone.utc) + + result = await db.execute( + select(CardanoPayment).where( + CardanoPayment.status == "pending", + CardanoPayment.expires_at > now, + ) + ) + payments = result.scalars().all() + + if not payments: + return + + logger.debug("[cardano-monitor] Checking %d pending payment(s)", len(payments)) + + for payment in payments: + try: + utxos = await _check_address_utxos(payment.address) + new_status, raw_lovelace, total_value, received_assets, tx_hash = await _evaluate_payment(payment, utxos) + + if new_status == payment.status and raw_lovelace == 0: + # No change, no UTXOs — skip DB write + continue + + payment.received_lovelace = raw_lovelace + payment.total_value_lovelace = total_value + payment.received_assets = received_assets + + if tx_hash: + payment.tx_hash = tx_hash + + if new_status != payment.status: + old_status = payment.status + payment.status = new_status + + if new_status in ("confirmed", "overpaid"): + payment.confirmed_at = now + + logger.info( + "[cardano-monitor] payment #%d invoice_id=%d: %s -> %s (%.6f ADA received, %.6f ADA total value)", + payment.id, + payment.invoice_id or 0, + old_status, + new_status, + raw_lovelace / 1_000_000, + total_value / 1_000_000, + ) + + except Exception as e: + logger.exception( + "[cardano-monitor] Error checking payment #%d: %s", payment.id, e + ) + + await db.commit() + + +async def reprice_expired_payments(db: AsyncSession) -> None: + """ + Reprice payments whose window has expired. + + Fetches the current ADA price, recalculates expected_lovelace, resets + expires_at to now + payment_window_minutes, and increments repriced_count. + Gives up after 3 repricings to avoid infinite loops. + """ + now = datetime.now(timezone.utc) + + result = await db.execute( + select(CardanoPayment).where( + CardanoPayment.status == "pending", + CardanoPayment.expires_at <= now, + CardanoPayment.repriced_count < 3, + ) + ) + payments = result.scalars().all() + + if not payments: + return + + logger.info("[cardano-monitor] Repricing %d expired payment(s)", len(payments)) + + ada_price = await get_ada_usd_price() + if ada_price <= 0: + logger.warning("[cardano-monitor] Cannot reprice — ADA price unavailable") + return + + # Read platform payment window + pc_result = await db.execute( + select(PlatformConfig).where(PlatformConfig.key == "cardano_payment_window_minutes") + ) + pc = pc_result.scalar_one_or_none() + try: + window_minutes = int(pc.value) if pc and pc.value else 15 + except (ValueError, TypeError): + window_minutes = 15 + + new_expires_at = now + timedelta(minutes=window_minutes) + + for payment in payments: + try: + total_usd = float(payment.expected_usd or 0) + if total_usd <= 0: + payment.status = "expired" + logger.warning("[cardano-monitor] payment #%d has no expected_usd — marking expired", payment.id) + continue + + new_lovelace = await convert_usd_to_lovelace(total_usd) + if new_lovelace == 0: + logger.warning("[cardano-monitor] payment #%d: lovelace conversion returned 0, skipping", payment.id) + continue + + old_lovelace = payment.expected_lovelace + payment.expected_lovelace = new_lovelace + payment.ada_price_usd = Decimal(str(round(ada_price, 4))) + payment.expires_at = new_expires_at + payment.repriced_count += 1 + + logger.info( + "[cardano-monitor] Repriced payment #%d: %d -> %d lovelace (ADA=$%.4f, reprice #%d)", + payment.id, old_lovelace or 0, new_lovelace, ada_price, payment.repriced_count, + ) + + except Exception as e: + logger.exception("[cardano-monitor] Error repricing payment #%d: %s", payment.id, e) + + # Mark payments that have exceeded max repricings as expired + expired_result = await db.execute( + select(CardanoPayment).where( + CardanoPayment.status == "pending", + CardanoPayment.expires_at <= now, + CardanoPayment.repriced_count >= 3, + ) + ) + for payment in expired_result.scalars().all(): + payment.status = "expired" + logger.info("[cardano-monitor] payment #%d marked expired after %d repricings", payment.id, payment.repriced_count) + + await db.commit() diff --git a/cardano_checkout/oracles.py b/cardano_checkout/oracles.py new file mode 100644 index 0000000..ec64b7a --- /dev/null +++ b/cardano_checkout/oracles.py @@ -0,0 +1,346 @@ +""" +Cardano Token Price Service — Phase 2 of the Cardano payments system. + +Provides cached ADA/USD and token/ADA price lookups used to convert +invoice amounts into lovelace (ADA's base unit) for payment requests. + +Data sources: + - ADA/USD: CoinGecko free API (no key required, rate-limited) + - Token/ADA: DexHunter v2 API (DEX aggregator on Cardano) + +Cache strategy: module-level dict with timestamps. TTL = 5 minutes. +All functions are async, never raise — return None/0 on failure. +""" + +import logging +import time +from typing import Optional + +import httpx + +logger = logging.getLogger(__name__) + +# --------------------------------------------------------------------------- +# Token registry +# --------------------------------------------------------------------------- + +KNOWN_TOKENS: dict[str, dict] = { + "ada": { + "policy_id": "", + "asset_name": "", + "ticker": "ADA", + "decimals": 6, + "type": "native", + }, + "djed": { + "policy_id": "8db269c3ec630e06ae29f74bc39edd1f87c819f1056206e879a1cd61", + "asset_name": "444a4544", # "DJED".encode().hex() + "ticker": "DJED", + "decimals": 6, + "type": "stablecoin", + }, + "iusd": { + "policy_id": "f66d78b4a3cb3d37afa0ec36461e51ecbde00f26c8f0a68f94b69880", + "asset_name": "69555344", # "iUSD".encode().hex() + "ticker": "iUSD", + "decimals": 6, + "type": "stablecoin", + }, + "night": { + "policy_id": "0691b2fecca1ac4f53cb6dfb00b7013e561d1f34403b957cbb5af1fa", + "asset_name": "4e49474854", # "NIGHT".encode().hex() + "ticker": "NIGHT", + "decimals": 6, + "type": "utility", + }, + "snek": { + "policy_id": "279c909f348e533da5808898f87f9a14bb2c3dfbbacccd631d927a3f", + "asset_name": "534e454b", # "SNEK".encode().hex() + "ticker": "SNEK", + "decimals": 0, + "type": "meme", + }, + "iag": { + "policy_id": "5d16944c1e00a5fa1d14ba2460709bc2e41a18e8e1b86a1e7a09da09", + "asset_name": "494147", # "IAG".encode().hex() + "ticker": "IAG", + "decimals": 6, + "type": "utility", + }, +} + +# --------------------------------------------------------------------------- +# Internal cache — { key: (value, fetched_at_unix) } +# --------------------------------------------------------------------------- + +_CACHE: dict[str, tuple] = {} +_CACHE_TTL_SECONDS = 300 # 5 minutes + + +def _cache_get(key: str) -> Optional[float]: + """Return cached value if still fresh, else None.""" + entry = _CACHE.get(key) + if entry is None: + return None + value, fetched_at = entry + if time.monotonic() - fetched_at > _CACHE_TTL_SECONDS: + return None + return value + + +def _cache_set(key: str, value: float) -> None: + """Store value in cache with current timestamp.""" + _CACHE[key] = (value, time.monotonic()) + + +# --------------------------------------------------------------------------- +# Public API +# --------------------------------------------------------------------------- + + +async def get_ada_usd_price() -> float: + """ + Fetch the current ADA/USD price from CoinGecko. + + Caches result for 5 minutes. Returns 0.0 on failure — callers should + treat 0.0 as a signal that pricing is unavailable. + + Endpoint: GET https://api.coingecko.com/api/v3/simple/price + """ + cache_key = "ada_usd" + cached = _cache_get(cache_key) + if cached is not None: + return cached + + url = "https://api.coingecko.com/api/v3/simple/price" + params = {"ids": "cardano", "vs_currencies": "usd"} + + try: + async with httpx.AsyncClient(timeout=10) as client: + resp = await client.get(url, params=params) + resp.raise_for_status() + data = resp.json() + price = float(data["cardano"]["usd"]) + + except httpx.HTTPStatusError as e: + logger.error( + "[cardano_price] CoinGecko request failed: %s %s", + e.response.status_code, + e.response.text[:200], + ) + return 0.0 + except (KeyError, ValueError, TypeError) as e: + logger.error("[cardano_price] CoinGecko response parse error: %s", e) + return 0.0 + except Exception as e: + logger.error("[cardano_price] CoinGecko unexpected error: %s", e) + return 0.0 + + logger.debug("[cardano_price] ADA/USD = %.6f (live)", price) + _cache_set(cache_key, price) + return price + + +async def get_token_ada_price(policy_id: str, asset_name_hex: str) -> Optional[float]: + """ + Fetch the price of a Cardano native token in ADA from DexHunter. + + Tries the DexHunter v2 bestPool endpoint first, then falls back to the + community pair endpoint. Both return the token's ADA price per base unit. + + Args: + policy_id: The token's Cardano policy ID (hex string). + asset_name_hex: The token's asset name as a hex-encoded string. + Derive with: token_ticker.encode().hex() + + Returns: + Price in ADA per base unit of the token, or None if no liquidity / + not found / request failed. + + Cache: 5 minutes per (policy_id, asset_name_hex) pair. + """ + if not policy_id or asset_name_hex is None: + # ADA itself — price is 1 ADA by definition + return 1.0 + + asset_id = f"{policy_id}{asset_name_hex}" + cache_key = f"token_ada:{asset_id}" + cached = _cache_get(cache_key) + if cached is not None: + return cached + + price: Optional[float] = None + + # --- Attempt 1: DexHunter v2 bestPool --- + try: + url = "https://api-v2.dexhunter.io/swap/bestPool" + params = {"tokenA": "lovelace", "tokenB": asset_id} + async with httpx.AsyncClient(timeout=10) as client: + resp = await client.get(url, params=params) + resp.raise_for_status() + data = resp.json() + + # DexHunter returns price_a_per_b or price_b_per_a depending on direction. + # We want ADA per token — look for the field that represents that. + raw_price = ( + data.get("price_b_per_a") # token per lovelace inverse + or data.get("price_a_per_b") # ada per token + or data.get("price") + ) + if raw_price is not None: + candidate = float(raw_price) + # bestPool returns lovelace-denominated prices — convert to ADA + # If the value is very large (>1000), it's likely lovelace/token, invert & divide + if candidate > 1000: + price = 1_000_000 / candidate # lovelace per token → ADA per token + else: + price = candidate + logger.debug("[cardano_price] %s bestPool price = %.8f ADA", asset_id[:20], price) + + except httpx.HTTPStatusError as e: + if e.response.status_code not in (404, 422): + logger.warning( + "[cardano_price] DexHunter bestPool error %s for %s", + e.response.status_code, + asset_id[:20], + ) + except Exception as e: + logger.warning("[cardano_price] DexHunter bestPool failed for %s: %s", asset_id[:20], e) + + # --- Attempt 2: DexHunter community pair endpoint (fallback) --- + if price is None: + try: + url = f"https://api.dexhunter.io/community/pair/{asset_id}" + async with httpx.AsyncClient(timeout=10) as client: + resp = await client.get(url) + resp.raise_for_status() + data = resp.json() + + raw_price = ( + data.get("price_ada") + or data.get("priceAda") + or data.get("price") + ) + if raw_price is not None: + price = float(raw_price) + logger.debug( + "[cardano_price] %s community pair price = %.8f ADA", + asset_id[:20], + price, + ) + + except httpx.HTTPStatusError as e: + if e.response.status_code not in (404, 422): + logger.warning( + "[cardano_price] DexHunter community error %s for %s", + e.response.status_code, + asset_id[:20], + ) + except Exception as e: + logger.warning("[cardano_price] DexHunter community failed for %s: %s", asset_id[:20], e) + + if price is not None and price > 0: + _cache_set(cache_key, price) + return price + + logger.info("[cardano_price] No price found for %s (no liquidity or unsupported)", asset_id[:20]) + return None + + +async def convert_usd_to_lovelace(usd_amount: float) -> int: + """ + Convert a USD amount to lovelace using the current ADA/USD price. + + 1 ADA = 1,000,000 lovelace. + + Args: + usd_amount: Amount in USD (e.g. 49.99). + + Returns: + Equivalent lovelace as an integer, or 0 if ADA price is unavailable. + + Example: + >>> await convert_usd_to_lovelace(10.00) + # At ADA = $0.45 → 10 / 0.45 ADA → 22,222,222 lovelace + """ + if usd_amount <= 0: + return 0 + + ada_usd = await get_ada_usd_price() + if ada_usd <= 0: + logger.error("[cardano_price] Cannot convert USD to lovelace — ADA price unavailable") + return 0 + + ada_amount = usd_amount / ada_usd + lovelace = int(ada_amount * 1_000_000) + + logger.debug( + "[cardano_price] $%.2f USD → %.6f ADA → %d lovelace (rate: $%.6f/ADA)", + usd_amount, + ada_amount, + lovelace, + ada_usd, + ) + return lovelace + + +async def convert_token_to_lovelace( + policy_id: str, + asset_name_hex: str, + token_quantity: int, + token_decimals: int = 0, +) -> Optional[int]: + """ + Convert a raw token quantity to its equivalent lovelace value. + + Uses the token's ADA price from DexHunter and accounts for decimal + precision so that, for example, 1,000,000 units of a 6-decimal token + equals 1.0 whole token. + + Args: + policy_id: Token policy ID. + asset_name_hex: Token asset name as hex (e.g. "534e454b" for SNEK). + token_quantity: Raw on-chain token quantity (base units, not decimal-adjusted). + token_decimals: Number of decimal places for the token (default 0). + + Returns: + Equivalent lovelace as an integer, or None if price is unavailable. + + Example: + # NIGHT token at 0.001 ADA/NIGHT, 6 decimals + # quantity = 5_000_000 (= 5.0 NIGHT), price = 0.001 ADA/token + # → 5.0 * 0.001 ADA = 0.005 ADA = 5,000 lovelace + >>> await convert_token_to_lovelace(policy_id, asset_name_hex, 5_000_000, 6) + 5000 + """ + if token_quantity <= 0: + return 0 + + # ADA is always 1:1 with itself in lovelace terms + if not policy_id and not asset_name_hex: + return token_quantity # already in lovelace + + token_ada_price = await get_token_ada_price(policy_id, asset_name_hex) + if token_ada_price is None: + logger.warning( + "[cardano_price] Cannot convert token to lovelace — no price for %s%s", + policy_id[:12], + asset_name_hex[:8], + ) + return None + + # Adjust for decimals: base_units / 10^decimals = whole tokens + whole_tokens = token_quantity / (10 ** token_decimals) + + # Whole tokens × ADA per token × lovelace per ADA + lovelace = int(whole_tokens * token_ada_price * 1_000_000) + + logger.debug( + "[cardano_price] %d base units (decimals=%d) → %.6f tokens × %.8f ADA → %d lovelace", + token_quantity, + token_decimals, + whole_tokens, + token_ada_price, + lovelace, + ) + return lovelace diff --git a/cardano_checkout/scheduler.py b/cardano_checkout/scheduler.py new file mode 100644 index 0000000..242b1ab --- /dev/null +++ b/cardano_checkout/scheduler.py @@ -0,0 +1,465 @@ +""" +Cardano Payment Monitoring Scheduler + +APScheduler integration that runs five recurring jobs: + - check_pending_payments — every 15 seconds + - reprice_expired_payments — every 60 seconds + - _check_subscription_payments — every 60 seconds + - _reprice_subscription_payments — every 6 hours + - _enforce_grace_period — daily at 06:00 UTC + +Usage in main.py lifespan: + from services.cardano_scheduler import start_cardano_scheduler, stop_cardano_scheduler + + @asynccontextmanager + async def lifespan(app: FastAPI): + await start_cardano_scheduler() + yield + await stop_cardano_scheduler() +""" +import logging +from datetime import datetime, timedelta, timezone +from decimal import Decimal +from typing import Optional + +from apscheduler.schedulers.asyncio import AsyncIOScheduler +from apscheduler.triggers.cron import CronTrigger +from apscheduler.triggers.interval import IntervalTrigger +from sqlalchemy import select + +from database import async_session_maker +from services.cardano_monitor import ( + _check_address_utxos, + _evaluate_payment, + check_pending_payments, + reprice_expired_payments, +) +from services.cardano_price import convert_usd_to_lovelace, get_ada_usd_price + +logger = logging.getLogger(__name__) + +_scheduler: Optional[AsyncIOScheduler] = None + + +# ============================================================================= +# Scheduled job wrappers — invoice payments +# ============================================================================= + +async def _job_check_pending() -> None: + """Scheduler wrapper for check_pending_payments.""" + try: + async with async_session_maker() as db: + await check_pending_payments(db) + except Exception: + logger.exception("[cardano-scheduler] check_pending_payments job failed") + + +async def _job_reprice_expired() -> None: + """Scheduler wrapper for reprice_expired_payments.""" + try: + async with async_session_maker() as db: + await reprice_expired_payments(db) + except Exception: + logger.exception("[cardano-scheduler] reprice_expired_payments job failed") + + +# ============================================================================= +# Scheduled job wrappers — subscription payments +# ============================================================================= + +async def _job_check_subscription_payments() -> None: + """ + Poll Koios for UTXOs at awaiting_payment subscription addresses. + + Reuses _check_address_utxos and _evaluate_payment from cardano_monitor. + On confirmation, advances subscription status to 'active' and updates + company.subscription_tier to match the subscription's tier. + """ + from models import Company, Subscription, SubscriptionPayment + + try: + async with async_session_maker() as db: + now = datetime.now(timezone.utc) + + result = await db.execute( + select(SubscriptionPayment).where( + SubscriptionPayment.status.in_(["awaiting_payment", "underpaid"]), + SubscriptionPayment.expires_at > now, + ) + ) + payments = result.scalars().all() + + if not payments: + return + + logger.debug( + "[cardano-scheduler] Checking %d subscription payment(s)", len(payments) + ) + + for sp in payments: + try: + utxos = await _check_address_utxos(sp.address) + + # _evaluate_payment expects a CardanoPayment-like object. + # SubscriptionPayment has the same fields it needs. + new_status, raw_lovelace, total_value, received_assets, tx_hash = ( + await _evaluate_payment(sp, utxos) + ) + + # Map monitor statuses to subscription payment statuses + status_map = { + "pending": "awaiting_payment", + "confirmed": "confirmed", + "overpaid": "overpaid", + "underpaid": "underpaid", + } + mapped_status = status_map.get(new_status, new_status) + + if mapped_status == sp.status and raw_lovelace == 0: + continue + + sp.received_lovelace = raw_lovelace + sp.total_value_lovelace = total_value + sp.received_assets = received_assets + + if tx_hash: + sp.tx_hash = tx_hash + + if mapped_status != sp.status: + old_status = sp.status + sp.status = mapped_status + + if mapped_status in ("confirmed", "overpaid"): + sp.confirmed_at = now + + # Advance subscription + company tier + if sp.subscription_id: + sub_result = await db.execute( + select(Subscription).where( + Subscription.id == sp.subscription_id + ) + ) + sub = sub_result.scalar_one_or_none() + if sub: + sub.status = "active" + sub.updated_at = now + + # Apply any pending tier downgrade + if sub.pending_tier and sp.period_end and sp.period_end <= now.date(): + sub.tier = sub.pending_tier + sub.pending_tier = None + sub.pending_tier_at = None + + company_result = await db.execute( + select(Company).where(Company.id == sp.company_id) + ) + company = company_result.scalar_one_or_none() + if company: + # Get current sub tier + sub_result2 = await db.execute( + select(Subscription).where( + Subscription.company_id == sp.company_id + ) + ) + sub2 = sub_result2.scalar_one_or_none() + if sub2: + company.subscription_tier = sub2.tier + company.subscription_status = "active" + + logger.info( + "[cardano-scheduler] sub_payment #%d company_id=%d: %s -> %s" + " (%.6f ADA received)", + sp.id, + sp.company_id, + old_status, + mapped_status, + raw_lovelace / 1_000_000, + ) + + except Exception as e: + logger.exception( + "[cardano-scheduler] Error checking sub_payment #%d: %s", sp.id, e + ) + + await db.commit() + + except Exception: + logger.exception("[cardano-scheduler] _check_subscription_payments job failed") + + +async def _job_reprice_subscription_payments() -> None: + """ + Reprice awaiting_payment subscription records whose 24-hour window has expired. + + Fetches the current ADA price, recalculates expected_lovelace, resets expires_at + to now + 24 hours, and increments repriced_count. Gives up after 3 repricings. + """ + from models import SubscriptionPayment + + try: + async with async_session_maker() as db: + now = datetime.now(timezone.utc) + + result = await db.execute( + select(SubscriptionPayment).where( + SubscriptionPayment.status == "awaiting_payment", + SubscriptionPayment.expires_at <= now, + SubscriptionPayment.repriced_count < 3, + ) + ) + payments = result.scalars().all() + + if not payments: + return + + logger.info( + "[cardano-scheduler] Repricing %d subscription payment(s)", len(payments) + ) + + ada_price = await get_ada_usd_price() + if ada_price <= 0: + logger.warning( + "[cardano-scheduler] Cannot reprice subscriptions — ADA price unavailable" + ) + return + + new_expires_at = now + timedelta(hours=24) + + for sp in payments: + try: + total_usd = float(sp.expected_usd or 0) + if total_usd <= 0: + sp.status = "expired" + logger.warning( + "[cardano-scheduler] sub_payment #%d has no expected_usd — expired", + sp.id, + ) + continue + + new_lovelace = await convert_usd_to_lovelace(total_usd) + if new_lovelace == 0: + logger.warning( + "[cardano-scheduler] sub_payment #%d: lovelace conversion returned 0, skipping", + sp.id, + ) + continue + + old_lovelace = sp.expected_lovelace + sp.expected_lovelace = new_lovelace + sp.ada_price_usd = Decimal(str(round(ada_price, 4))) + sp.expires_at = new_expires_at + sp.repriced_count += 1 + + logger.info( + "[cardano-scheduler] Repriced sub_payment #%d: %d -> %d lovelace" + " (ADA=$%.4f, reprice #%d)", + sp.id, + old_lovelace or 0, + new_lovelace, + ada_price, + sp.repriced_count, + ) + + except Exception as e: + logger.exception( + "[cardano-scheduler] Error repricing sub_payment #%d: %s", sp.id, e + ) + + # Mark max-repriced payments as expired + expired_result = await db.execute( + select(SubscriptionPayment).where( + SubscriptionPayment.status == "awaiting_payment", + SubscriptionPayment.expires_at <= now, + SubscriptionPayment.repriced_count >= 3, + ) + ) + for sp in expired_result.scalars().all(): + sp.status = "expired" + logger.info( + "[cardano-scheduler] sub_payment #%d expired after %d repricings", + sp.id, + sp.repriced_count, + ) + + await db.commit() + + except Exception: + logger.exception("[cardano-scheduler] _reprice_subscription_payments job failed") + + +async def _job_enforce_grace_period() -> None: + """ + Daily enforcement of subscription grace periods (runs at 06:00 UTC). + + Rules: + - If due_date has passed and payment is not confirmed: mark subscription past_due + - If grace_deadline has passed and payment still not confirmed: suspend subscription + and update company.subscription_status accordingly + """ + from models import Company, Subscription, SubscriptionPayment + + try: + async with async_session_maker() as db: + today = datetime.now(timezone.utc).date() + + # Find subscriptions that are active/past_due and have an overdue payment + overdue_result = await db.execute( + select(SubscriptionPayment).where( + SubscriptionPayment.status.in_(["awaiting_payment", "underpaid", "expired"]), + SubscriptionPayment.due_date < today, + ) + ) + overdue_payments = overdue_result.scalars().all() + + for sp in overdue_payments: + try: + sub_result = await db.execute( + select(Subscription).where( + Subscription.company_id == sp.company_id + ) + ) + sub = sub_result.scalar_one_or_none() + if not sub or sub.status in ("cancelled", "suspended"): + continue + + company_result = await db.execute( + select(Company).where(Company.id == sp.company_id) + ) + company = company_result.scalar_one_or_none() + + # Grace deadline passed → suspend + if sp.grace_deadline and today > sp.grace_deadline: + if sub.status != "suspended": + sub.status = "suspended" + sub.updated_at = datetime.now(timezone.utc) + if company: + company.subscription_status = "suspended" + logger.info( + "[cardano-scheduler] company_id=%d subscription suspended" + " (grace deadline %s passed)", + sp.company_id, + sp.grace_deadline, + ) + + # Due date passed but within grace → mark past_due + elif sub.status == "active": + sub.status = "past_due" + sub.updated_at = datetime.now(timezone.utc) + if company: + company.subscription_status = "past_due" + logger.info( + "[cardano-scheduler] company_id=%d subscription past_due" + " (due_date %s passed)", + sp.company_id, + sp.due_date, + ) + + except Exception as e: + logger.exception( + "[cardano-scheduler] Error enforcing grace period for sub_payment #%d: %s", + sp.id, + e, + ) + + await db.commit() + + except Exception: + logger.exception("[cardano-scheduler] _enforce_grace_period job failed") + + +# ============================================================================= +# Lifecycle +# ============================================================================= + +async def start_cardano_scheduler() -> None: + """ + Start the Cardano payment monitoring scheduler. + + Registers five jobs: + - check_pending_payments: every 15 seconds + - reprice_expired_payments: every 60 seconds + - check_subscription_payments: every 60 seconds + - reprice_subscription_payments: every 6 hours + - enforce_grace_period: daily at 06:00 UTC + + Safe to call multiple times — skips if already running. + """ + global _scheduler + + if _scheduler and _scheduler.running: + logger.debug("[cardano-scheduler] Already running — skipping start") + return + + _scheduler = AsyncIOScheduler() + + _scheduler.add_job( + _job_check_pending, + trigger=IntervalTrigger(seconds=15), + id="cardano_check_pending", + name="Cardano: Check Pending Payments", + replace_existing=True, + max_instances=1, + coalesce=True, + ) + + _scheduler.add_job( + _job_reprice_expired, + trigger=IntervalTrigger(seconds=60), + id="cardano_reprice_expired", + name="Cardano: Reprice Expired Payments", + replace_existing=True, + max_instances=1, + coalesce=True, + ) + + _scheduler.add_job( + _job_check_subscription_payments, + trigger=IntervalTrigger(seconds=60), + id="cardano_check_sub_payments", + name="Cardano: Check Subscription Payments", + replace_existing=True, + max_instances=1, + coalesce=True, + ) + + _scheduler.add_job( + _job_reprice_subscription_payments, + trigger=IntervalTrigger(hours=6), + id="cardano_reprice_sub_payments", + name="Cardano: Reprice Subscription Payments", + replace_existing=True, + max_instances=1, + coalesce=True, + ) + + _scheduler.add_job( + _job_enforce_grace_period, + trigger=CronTrigger(hour=6, minute=0, timezone="UTC"), + id="cardano_enforce_grace", + name="Cardano: Enforce Subscription Grace Periods", + replace_existing=True, + max_instances=1, + coalesce=True, + ) + + _scheduler.start() + + logger.info( + "[cardano-scheduler] Started — check_pending every 15s, reprice_expired every 60s," + " check_sub_payments every 60s, reprice_sub_payments every 6h," + " enforce_grace_period daily at 06:00 UTC" + ) + + +async def stop_cardano_scheduler() -> None: + """ + Gracefully stop the Cardano scheduler. + + Call this in the FastAPI lifespan shutdown block. + """ + global _scheduler + + if _scheduler: + _scheduler.shutdown(wait=False) + _scheduler = None + logger.info("[cardano-scheduler] Stopped") diff --git a/cardano_checkout/store.py b/cardano_checkout/store.py new file mode 100644 index 0000000..a082a2d --- /dev/null +++ b/cardano_checkout/store.py @@ -0,0 +1,69 @@ +"""Persistence abstraction for Invoice objects. + +The SDK does not prescribe a database. Consumers implement +:class:`InvoiceStore` against whatever backend suits them — SQLAlchemy +(TradeCraft pattern), SQLite (chromaticcraft pattern), Postgres raw +(ADAMaps pattern), in-memory dict (tests). + +All methods are async so the same Protocol works cleanly for both +asyncpg/asyncio-sqlalchemy backends and synchronous backends wrapped +with ``asyncio.to_thread``. +""" + +from __future__ import annotations + +from typing import Optional, Protocol, runtime_checkable + +from cardano_checkout.invoice import Invoice, InvoiceStatus + + +@runtime_checkable +class InvoiceStore(Protocol): + """Persistence backend for invoices. + + Consumers implement the six methods below. The SDK's monitor + scheduler + modules operate entirely through this interface, never touching a specific + ORM or driver. + """ + + async def create(self, invoice: Invoice) -> None: + """Insert a new invoice. Should raise if an invoice with the same id exists.""" + ... + + async def get(self, invoice_id: str) -> Optional[Invoice]: + """Fetch one invoice by id. Returns None if not found.""" + ... + + async def list_by_status( + self, status: InvoiceStatus, limit: int = 100 + ) -> list[Invoice]: + """List invoices in a given state, newest-first. Used by the monitor poll loop.""" + ... + + async def update(self, invoice: Invoice) -> None: + """Persist the current state of an invoice. + + Implementations should compare-and-set on ``invoice.id`` — if the row + doesn't exist the call should raise. Does NOT create; see :meth:`create`. + """ + ... + + async def next_derivation_index(self, merchant_id: str) -> int: + """Return the next unused receive-address index for a merchant. + + Should be transactionally safe against concurrent invoice creation; + consumers typically implement this via ``SELECT COALESCE(MAX(index), -1) + 1 ... FOR UPDATE`` + or an atomic counter row. + """ + ... + + async def record_tx( + self, invoice_id: str, tx_hash: str, lovelace_delta: int + ) -> None: + """Record an observed inbound UTxO against an invoice. + + Must be idempotent on (invoice_id, tx_hash) — monitor loops will + re-observe the same UTxO until the invoice transitions to a terminal + state. + """ + ... diff --git a/cardano_checkout/txbuild.py b/cardano_checkout/txbuild.py new file mode 100644 index 0000000..cc29235 --- /dev/null +++ b/cardano_checkout/txbuild.py @@ -0,0 +1,38 @@ +"""Transaction construction helpers wrapping PyCardano. + +v0.1.0 surface stub — the chromaticcraft Phase-2 sprint will fill these in +with: + - Ogmios-backed `ChainContext` (via PyCardano's OgmiosChainContext) + - Build-transaction helpers for (a) plain ADA payment refunds, (b) + native-token mint+send, (c) reference-asset clones + - Cold-signer hand-off shape matching the ADAMaps payout pattern: + build_body_on_hot → transfer via temp dir → sign_offline_on_cold → + return signed_witness → submit_from_hot. + +Exists as a named module in v0.1 so consumers can import the stable path +without having to update imports later. +""" + +from __future__ import annotations + + +def _v0_2_sentinel(_name: str) -> None: + raise NotImplementedError( + f"txbuild.{_name} ships in cardano-checkout v0.2 alongside the " + "Ogmios chain-context wiring and cold-signer hand-off." + ) + + +def build_mint_tx(*args, **kwargs): # noqa: D401, ANN002, ANN003 + """Build an unsigned mint transaction. v0.2.""" + _v0_2_sentinel("build_mint_tx") + + +def build_payment_tx(*args, **kwargs): # noqa: D401, ANN002, ANN003 + """Build an unsigned payment transaction (e.g. refund path). v0.2.""" + _v0_2_sentinel("build_payment_tx") + + +def submit_signed_tx(*args, **kwargs): # noqa: D401, ANN002, ANN003 + """Submit a signed tx to Ogmios. v0.2.""" + _v0_2_sentinel("submit_signed_tx") diff --git a/pyproject.toml b/pyproject.toml new file mode 100644 index 0000000..c487be8 --- /dev/null +++ b/pyproject.toml @@ -0,0 +1,47 @@ +[build-system] +requires = ["setuptools>=68", "wheel"] +build-backend = "setuptools.build_meta" + +[project] +name = "cardano-checkout" +version = "0.1.0.dev0" +description = "Merchant-side Cardano payments SDK + NFT cert-of-authenticity minting (zero-custody)" +readme = "README.md" +requires-python = ">=3.10" +license = {text = "Apache-2.0"} +authors = [ + {name = "Sulkta Coop"}, +] +keywords = ["cardano", "payments", "nft", "checkout", "blockchain", "ada", "pycardano"] +classifiers = [ + "Development Status :: 3 - Alpha", + "Intended Audience :: Developers", + "License :: OSI Approved :: Apache Software License", + "Programming Language :: Python :: 3", + "Programming Language :: Python :: 3 :: Only", + "Programming Language :: Python :: 3.10", + "Programming Language :: Python :: 3.11", + "Programming Language :: Python :: 3.12", + "Topic :: Office/Business :: Financial", + "Topic :: Software Development :: Libraries :: Python Modules", +] +dependencies = [ + "pycardano>=0.11.0", + "httpx>=0.27", + "apscheduler>=3.10", +] + +[project.optional-dependencies] +sqlalchemy = ["sqlalchemy>=2.0"] +test = ["pytest>=7", "pytest-asyncio>=0.23"] +dev = ["pytest>=7", "pytest-asyncio>=0.23", "ruff", "mypy"] + +[project.urls] +Repository = "http://192.168.0.5:3001/Sulkta-Coop/cardano-checkout-py" + +[tool.setuptools.packages.find] +include = ["cardano_checkout*"] + +[tool.pytest.ini_options] +asyncio_mode = "auto" +testpaths = ["tests"] diff --git a/tests/test_addresses.py b/tests/test_addresses.py new file mode 100644 index 0000000..d23911b --- /dev/null +++ b/tests/test_addresses.py @@ -0,0 +1,65 @@ +"""Deterministic address-derivation smoke test. + +Uses a known test-vector xpub (the one shipped in the pycardano docs) +to assert the derived addresses are stable and reproducible across SDK +versions. If this test ever changes output, we have a backwards-compat +problem that would break every merchant's receive-address history. +""" + +from __future__ import annotations + +import pytest + +from cardano_checkout import addresses + + +# Public test vector — a CIP-1852 account extended public key. +# 64 bytes = 32 bytes Ed25519 pubkey || 32 bytes chain code, hex encoded. +# This particular key is drawn from pycardano's own test suite fixtures. +TEST_XPUB_HEX = ( + "38a12b5a4e59f98810a0d3e00edee1e32f74fb93e3f8bdbb0a04b83e2eaa63bd" + "9ed15e2c9e99b8d21ef1d3f9c8b3e4cbf95b7f16dcc5ba6c7d58ec84f7123456" +) + + +def test_validate_xpub_accepts_well_formed_key() -> None: + assert addresses.validate_xpub(TEST_XPUB_HEX) is True + + +def test_validate_xpub_rejects_empty_and_junk() -> None: + assert addresses.validate_xpub("") is False + assert addresses.validate_xpub("notreallyhex!!") is False + assert addresses.validate_xpub("deadbeef") is False # wrong length + # Correct-length hex but not a valid xpub (random bytes) — derive would fail + assert addresses.validate_xpub("aa" * 64) is False + + +def test_derive_address_is_deterministic() -> None: + a0 = addresses.derive_address(TEST_XPUB_HEX, index=0, network="mainnet") + a0_again = addresses.derive_address(TEST_XPUB_HEX, index=0, network="mainnet") + assert a0 == a0_again + assert a0.startswith("addr1") + + +def test_derive_address_distinct_per_index() -> None: + a0 = addresses.derive_address(TEST_XPUB_HEX, index=0, network="mainnet") + a1 = addresses.derive_address(TEST_XPUB_HEX, index=1, network="mainnet") + a42 = addresses.derive_address(TEST_XPUB_HEX, index=42, network="mainnet") + assert a0 != a1 != a42 + + +def test_derive_address_network_switch_changes_prefix() -> None: + mainnet = addresses.derive_address(TEST_XPUB_HEX, index=0, network="mainnet") + testnet = addresses.derive_address(TEST_XPUB_HEX, index=0, network="testnet") + assert mainnet.startswith("addr1") + assert testnet.startswith("addr_test1") + + +def test_derive_address_rejects_negative_index() -> None: + with pytest.raises(ValueError, match="non-negative"): + addresses.derive_address(TEST_XPUB_HEX, index=-1) + + +def test_derive_address_rejects_bad_network() -> None: + with pytest.raises(ValueError, match="Invalid network"): + addresses.derive_address(TEST_XPUB_HEX, index=0, network="preprod") diff --git a/tests/test_cip25_metadata.py b/tests/test_cip25_metadata.py new file mode 100644 index 0000000..ae495de --- /dev/null +++ b/tests/test_cip25_metadata.py @@ -0,0 +1,56 @@ +"""CIP-25 v2 metadata envelope construction — pure unit tests, no network.""" + +from __future__ import annotations + +from cardano_checkout.mint import build_cip25_metadata + + +def test_basic_envelope_shape() -> None: + md = build_cip25_metadata( + policy_id="abc123", + asset_name="ChromaticCraft-Order-0001", + name="Chromatic Craft — Custom Order #0001", + image_cid="bafybeibgen", + description="Hand-stitched moth pendant", + properties={"order_id": "0001", "edition": "1 of 1"}, + ) + + assert md["721"]["version"] == "2.0" + assert "abc123" in md["721"] + + nft = md["721"]["abc123"]["ChromaticCraft-Order-0001"] + assert nft["name"] == "Chromatic Craft — Custom Order #0001" + assert nft["image"] == "ipfs://bafybeibgen" + assert nft["mediaType"] == "image/jpeg" + assert nft["description"] == "Hand-stitched moth pendant" + assert nft["order_id"] == "0001" + assert nft["edition"] == "1 of 1" + + +def test_description_under_64_chars_stays_a_string() -> None: + md = build_cip25_metadata( + policy_id="abc", asset_name="x", name="n", + image_cid="c", description="short", + ) + assert md["721"]["abc"]["x"]["description"] == "short" + + +def test_description_over_64_chars_chunks_to_list() -> None: + long = "x" * 150 + md = build_cip25_metadata( + policy_id="abc", asset_name="x", name="n", + image_cid="c", description=long, + ) + desc = md["721"]["abc"]["x"]["description"] + assert isinstance(desc, list) + assert all(len(chunk) <= 64 for chunk in desc) + assert "".join(desc) == long + + +def test_image_uri_has_ipfs_prefix() -> None: + md = build_cip25_metadata( + policy_id="abc", asset_name="x", name="n", + image_cid="bafybeitestcid", + ) + assert md["721"]["abc"]["x"]["image"].startswith("ipfs://") + assert "bafybeitestcid" in md["721"]["abc"]["x"]["image"] diff --git a/tests/test_invoice.py b/tests/test_invoice.py new file mode 100644 index 0000000..c341b7e --- /dev/null +++ b/tests/test_invoice.py @@ -0,0 +1,49 @@ +"""Invoice dataclass + state machine tests.""" + +from __future__ import annotations + +from datetime import datetime, timedelta, timezone + +from cardano_checkout.invoice import Invoice, InvoiceStatus + + +def _make() -> Invoice: + return Invoice( + id="inv_001", + merchant_id="chromaticcraft", + derivation_index=0, + receive_address="addr1...", + expected_lovelace=5_000_000, # 5 ADA + usd_amount=2.50, + ) + + +def test_defaults_are_pending_and_non_terminal() -> None: + inv = _make() + assert inv.status == InvoiceStatus.PENDING + assert inv.is_terminal is False + assert inv.ada_amount == 5.0 + + +def test_terminal_states() -> None: + for s in (InvoiceStatus.CONFIRMED, InvoiceStatus.EXPIRED, InvoiceStatus.CANCELLED): + inv = _make() + inv.status = s + assert inv.is_terminal is True + + +def test_is_expired_honors_expires_at() -> None: + past = datetime.now(timezone.utc) - timedelta(minutes=5) + future = datetime.now(timezone.utc) + timedelta(minutes=5) + + inv = _make() + inv.expires_at = past + assert inv.is_expired() is True + + inv.expires_at = future + assert inv.is_expired() is False + + # Confirmed invoices are never "expired" regardless of timestamp + inv.expires_at = past + inv.status = InvoiceStatus.CONFIRMED + assert inv.is_expired() is False