a2a-source-edit: write agent.py

This commit is contained in:
a2a-cloud
2026-07-18 03:12:04 +00:00
parent e3af4ac564
commit 594f748121

739
agent.py
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@@ -1,189 +1,644 @@
"""quote-judge-studio-v1 agent.
"""QuoteJudge full-stack A2A agent.
Starter stack:
- DeepAgents for tool-calling orchestration
- Caller-provided LLM credentials via ctx.llm
- A tiny model-call middleware hook you can replace with tracing,
routing, rate limits, or policy checks
Deterministic quote comparison, per-user persistence in managed Postgres,
browser-safe upload parsing, and production execution receipt storage.
"""
from __future__ import annotations
import base64
import csv
import hashlib
import io
import json
from pathlib import Path
from typing import Any
import os
import re
import time
import uuid
from contextlib import contextmanager
from datetime import datetime, timezone
from typing import Annotated, Any
from pydantic import BaseModel
from pydantic import BaseModel, Field, field_validator
import a2a_pack as a2a
from a2a_pack import (
A2AAgent,
LLMProvisioning,
{{ auth_type }},
AgentDatabase,
AgentDatabaseEnv,
AgentDatabaseMigrations,
AgentPlatformResources,
PlatformUserAuth,
Pricing,
Resources,
RunContext,
WorkspaceAccess,
WorkspaceMode,
State,
)
from a2a_pack.context import LLMCreds
from a2a_pack.workspace import FileUpload, UploadedFile
try: # psycopg is installed in deployment and sandbox via requirements.txt.
import psycopg
from psycopg.rows import dict_row
except Exception: # pragma: no cover - import guard for card-only tooling
psycopg = None
dict_row = None
MAX_QUOTES = 20
MAX_VENDOR_LENGTH = 120
MAX_UPLOADS = 5
MAX_UPLOAD_BYTES = 128_000
ALLOWED_UPLOAD_MEDIA_TYPES = {"text/csv", "text/plain", "application/json"}
_DATABASE_NAME = "quote-judge-studio-v1-data"
_LOCAL_COMPARISONS: dict[tuple[str, str], dict[str, Any]] = {}
_LOCAL_RECEIPTS: list[dict[str, Any]] = []
class QuoteJudgeStudioV1Config(BaseModel):
pass
"""No caller-configured settings are required."""
SYSTEM_PROMPT = """\
You are a compact tool-calling agent.
class QuoteInput(BaseModel):
vendor: str = Field(..., min_length=1, max_length=MAX_VENDOR_LENGTH)
quantity: int = Field(..., gt=0, le=10_000_000)
unit_price: float = Field(..., ge=0, le=1_000_000_000)
delivery_days: int = Field(..., ge=0, le=3650)
warranty_months: int = Field(..., ge=0, le=600)
Use the text_stats tool when the user asks about text, counts, summaries,
or anything where exact length/word numbers would help. Mention tool results
briefly instead of dumping raw JSON.
"""
RUNTIME_SKILLS_DIR = "quote-judge-studio-v1/.deepagents/skills/"
DEEPAGENTS_RECURSION_LIMIT = 500
@field_validator("vendor")
@classmethod
def clean_vendor(cls, value: str) -> str:
cleaned = " ".join(value.strip().split())
if not cleaned:
raise ValueError("vendor is required")
return cleaned
class QuoteJudgeStudioV1(A2AAgent[QuoteJudgeStudioV1Config, {{ auth_type }}]):
class QuoteWeights(BaseModel):
price: float = Field(..., ge=0, le=100)
delivery: float = Field(..., ge=0, le=100)
warranty: float = Field(..., ge=0, le=100)
@field_validator("warranty")
@classmethod
def weights_must_be_positive(cls, value: float, info: Any) -> float:
values = info.data
total = float(values.get("price", 0)) + float(values.get("delivery", 0)) + float(value)
if total <= 0:
raise ValueError("at least one weight must be positive")
return value
class BrowserQuoteDocument(BaseModel):
filename: str = Field(..., min_length=1, max_length=160)
media_type: str = Field(..., min_length=1, max_length=100)
data_base64: str = Field(..., min_length=1)
@field_validator("filename")
@classmethod
def safe_filename(cls, value: str) -> str:
cleaned = value.strip().replace("\\", "/").split("/")[-1]
if not cleaned or cleaned in {".", ".."}:
raise ValueError("filename is required")
return cleaned[:160]
class QuoteJudgeStudioV1(A2AAgent[QuoteJudgeStudioV1Config, PlatformUserAuth]):
name = "quote-judge-studio-v1"
description = "QuoteJudge compares vendor quotes with weighted price, delivery, and warranty scoring, persists per-user comparisons, and serves a one-page product UI."
description = (
"QuoteJudge compares vendor quotes with weighted price, delivery, and "
"warranty scoring, persists per-user comparisons, and serves a one-page product UI."
)
version = "0.1.0"
config_model = QuoteJudgeStudioV1Config
auth_model = {{ auth_type }}
# Hosted generated agents read the caller's saved LLM credential through
# ctx.llm. The platform may proxy that credential through LiteLLM, but agent
# code never reads provider keys, LiteLLM master keys, or OPENAI_API_KEY
# directly.
llm_provisioning = LLMProvisioning.PLATFORM
auth_model = PlatformUserAuth
state = State.DURABLE
resources = Resources(cpu="500m", memory="512Mi", max_runtime_seconds=300)
platform_resources = AgentPlatformResources(
databases=(
AgentDatabase(
name=_DATABASE_NAME,
scope="user",
access_mode="read_write",
env=AgentDatabaseEnv(url="DATABASE_URL"),
migrations=AgentDatabaseMigrations(path="db/migrations"),
),
)
)
pricing = Pricing(
price_per_call_usd=0.0,
caller_pays_llm=True,
notes="Starter agent uses the caller's saved LLM credential via ctx.llm.",
caller_pays_llm=False,
notes="Deterministic local quote scoring; no LLM credential is required.",
)
workspace_access = WorkspaceAccess.dynamic(
max_files=64,
allowed_modes=(WorkspaceMode.READ_ONLY, WorkspaceMode.READ_WRITE_OVERLAY),
require_reason=False,
)
tools_used = ("deepagents", "langchain")
tools_used = ("postgres", "mcp")
@a2a.tool(description="Ask the starter DeepAgent to answer with tool calls when useful")
async def ask(self, ctx: RunContext[{{ auth_type }}], prompt: str) -> str:
creds = ctx.llm
await ctx.emit_progress(f"llm: {creds.model} via {creds.source}")
if not creds.api_key:
return (
"LLM key required. Add an LLM credential in Settings > LLM "
"credentials before running this agent; for local --invoke "
"runs set AGENT_LLM_KEY."
@a2a.tool(
description=(
"Compare at least two vendor quotes using typed price, delivery, and warranty "
"weights; persist the recommendation and a production receipt."
),
timeout_seconds=30,
idempotent=True,
cost_class="cheap",
)
graph = self._build_deep_agent(ctx=ctx, creds=creds)
state = await graph.ainvoke(
{"messages": [{"role": "user", "content": prompt}]},
config={"recursion_limit": DEEPAGENTS_RECURSION_LIMIT},
)
await ctx.emit_progress("deepagent finished")
return _last_message_text(state)
def _build_deep_agent(
async def compare_quotes(
self,
*,
ctx: RunContext[{{ auth_type }}],
creds: LLMCreds,
) -> Any:
# Lazy imports keep `a2a card` usable before local dependencies are
# installed. `a2a deploy` installs requirements.txt during the build.
from a2a_pack.deepagents import create_a2a_deep_agent
from langchain.agents.middleware import wrap_model_call
from langchain_core.tools import tool
ctx: RunContext[PlatformUserAuth],
comparison_id: str,
quotes: list[QuoteInput],
weights: QuoteWeights,
) -> dict[str, Any]:
tenant = _tenant_key(ctx)
cleaned_id = _clean_comparison_id(comparison_id)
started = _now_iso()
input_payload = {
"comparison_id": cleaned_id,
"quotes": [quote.model_dump() for quote in quotes],
"weights": weights.model_dump(),
}
@tool
def text_stats(text: str) -> str:
"""Return exact word, character, and line counts for text."""
words = [part for part in text.split() if part.strip()]
return json.dumps(
if len(quotes) < 2:
result = {
"ok": False,
"code": "at_least_two_quotes_required",
"message": "Add at least two vendor quotes before comparing.",
"comparison_id": cleaned_id,
}
await _persist_receipt(
tenant_key=tenant,
comparison_id=cleaned_id,
skill_name="compare_quotes",
input_payload=input_payload,
result_payload=result,
status="validation_error",
started_at=started,
)
return result
if len(quotes) > MAX_QUOTES:
result = {
"ok": False,
"code": "too_many_quotes",
"message": f"Compare at most {MAX_QUOTES} quotes at a time.",
"comparison_id": cleaned_id,
}
await _persist_receipt(
tenant_key=tenant,
comparison_id=cleaned_id,
skill_name="compare_quotes",
input_payload=input_payload,
result_payload=result,
status="validation_error",
started_at=started,
)
return result
result = _score_quotes(cleaned_id, quotes, weights)
await _save_comparison(tenant, result)
await _persist_receipt(
tenant_key=tenant,
comparison_id=cleaned_id,
skill_name="compare_quotes",
input_payload=input_payload,
result_payload=result,
status="ok",
started_at=started,
)
return result
@a2a.tool(
description="Reopen a saved QuoteJudge comparison for the authenticated user.",
timeout_seconds=15,
idempotent=True,
cost_class="cheap",
)
async def get_comparison(
self,
ctx: RunContext[PlatformUserAuth],
comparison_id: str,
) -> dict[str, Any]:
tenant = _tenant_key(ctx)
cleaned_id = _clean_comparison_id(comparison_id)
started = _now_iso()
record = await _load_comparison(tenant, cleaned_id)
if record is None:
result = {
"ok": False,
"code": "comparison_not_found",
"message": "No saved comparison exists for this id and user.",
"comparison_id": cleaned_id,
}
else:
result = dict(record)
result["ok"] = True
await _persist_receipt(
tenant_key=tenant,
comparison_id=cleaned_id,
skill_name="get_comparison",
input_payload={"comparison_id": cleaned_id},
result_payload=result,
status="ok" if result.get("ok") else "not_found",
started_at=started,
)
return result
@a2a.tool(
description=(
"Browser upload bridge: parse bounded base64 JSON/CSV/text quote files, "
"compare extracted quotes, and persist the result."
),
timeout_seconds=30,
idempotent=True,
cost_class="cheap",
)
async def compare_uploaded_quotes_browser(
self,
ctx: RunContext[PlatformUserAuth],
comparison_id: str,
documents: list[BrowserQuoteDocument],
weights: QuoteWeights,
) -> dict[str, Any]:
parsed = _parse_browser_documents(documents)
if not parsed["ok"]:
return parsed
return await self.compare_quotes(
ctx,
comparison_id=comparison_id,
quotes=[QuoteInput.model_validate(item) for item in parsed["quotes"]],
weights=weights,
)
@a2a.tool(
description=(
"External-client upload path: parse an uploaded CSV, JSON, or plain-text quote "
"file and compare extracted quotes."
),
timeout_seconds=30,
idempotent=True,
cost_class="cheap",
)
async def compare_uploaded_quote_file(
self,
ctx: RunContext[PlatformUserAuth],
comparison_id: str,
document: Annotated[
UploadedFile,
FileUpload(
accept=("text/csv", "text/plain", "application/json"),
max_bytes=MAX_UPLOAD_BYTES,
description="CSV, JSON, or text file containing vendor quote rows.",
),
],
weights: QuoteWeights,
) -> dict[str, Any]:
if document.size_bytes > MAX_UPLOAD_BYTES:
return {
"ok": False,
"code": "upload_too_large",
"message": f"Upload must be {MAX_UPLOAD_BYTES} bytes or smaller.",
"comparison_id": _clean_comparison_id(comparison_id),
}
if document.media_type not in ALLOWED_UPLOAD_MEDIA_TYPES:
return {
"ok": False,
"code": "unsupported_media_type",
"message": "Upload must be CSV, JSON, or plain text.",
"comparison_id": _clean_comparison_id(comparison_id),
}
try:
view = await ctx.workspace.open_view(
purpose="Read uploaded vendor quote file",
hints=[document.path],
max_files=1,
reason="Parse the caller-uploaded quote file for comparison.",
)
raw = await view.read(document.path)
except Exception:
return {
"ok": False,
"code": "upload_read_failed",
"message": "Could not read the uploaded file from the granted workspace.",
"comparison_id": _clean_comparison_id(comparison_id),
}
parsed = _parse_document_bytes(document.filename, document.media_type, raw)
if not parsed["ok"]:
return parsed
return await self.compare_quotes(
ctx,
comparison_id=comparison_id,
quotes=[QuoteInput.model_validate(item) for item in parsed["quotes"]],
weights=weights,
)
def _tenant_key(ctx: RunContext[PlatformUserAuth]) -> str:
auth = ctx.auth
ident = auth.user_id if auth.user_id is not None else (auth.sub or auth.email)
return f"user:{ident}"
def _clean_comparison_id(value: str) -> str:
cleaned = str(value or "").strip()
if not re.fullmatch(r"[A-Za-z0-9][A-Za-z0-9_.:-]{0,79}", cleaned):
raise ValueError("comparison_id must be 1-80 safe characters")
return cleaned
def _score_quotes(comparison_id: str, quotes: list[QuoteInput], weights: QuoteWeights) -> dict[str, Any]:
quote_rows = [quote.model_dump() for quote in quotes]
for row in quote_rows:
row["subtotal"] = round(row["quantity"] * row["unit_price"], 2)
totals = [row["subtotal"] for row in quote_rows]
deliveries = [row["delivery_days"] for row in quote_rows]
warranties = [row["warranty_months"] for row in quote_rows]
total_weight = weights.price + weights.delivery + weights.warranty
normalized_weights = {
"price": weights.price / total_weight,
"delivery": weights.delivery / total_weight,
"warranty": weights.warranty / total_weight,
}
scored: list[dict[str, Any]] = []
for row in quote_rows:
price_score = _lower_is_better(row["subtotal"], totals)
delivery_score = _lower_is_better(row["delivery_days"], deliveries)
warranty_score = _higher_is_better(row["warranty_months"], warranties)
weighted_score = (
price_score * normalized_weights["price"]
+ delivery_score * normalized_weights["delivery"]
+ warranty_score * normalized_weights["warranty"]
)
scored.append(
{
"characters": len(text),
"words": len(words),
"lines": len(text.splitlines()) or 1,
**row,
"scores": {
"price": round(price_score, 4),
"delivery": round(delivery_score, 4),
"warranty": round(warranty_score, 4),
"weighted_total": round(weighted_score, 4),
},
}
)
@wrap_model_call
async def log_model_call(request: Any, handler: Any) -> Any:
messages = request.state.get("messages", [])
print(
"[middleware] model_call "
f"model={creds.model} source={creds.source} messages={len(messages)}"
scored.sort(
key=lambda item: (
-item["scores"]["weighted_total"],
item["subtotal"],
item["delivery_days"],
-item["warranty_months"],
item["vendor"].lower(),
)
return await handler(request)
backend = ctx.workspace_backend()
skill_sources = _seed_runtime_skills(backend, ctx)
# create_a2a_deep_agent resolves provider:model strings with
# langchain.init_chat_model from ctx.llm, preserving LiteLLM routing,
# provider-specific extra body, and runtime model overrides.
return create_a2a_deep_agent(
ctx,
creds=creds,
backend=backend,
skills=skill_sources or None,
tools=[text_stats],
middleware=[log_model_call],
system_prompt=SYSTEM_PROMPT,
)
winner = scored[0]
baseline = min(scored, key=lambda item: item["subtotal"])
rationale_bits = [
f"{winner['vendor']} has the highest weighted score ({winner['scores']['weighted_total']:.2f}).",
f"Its normalized total is {winner['subtotal']:.2f} for {winner['quantity']} units.",
]
if winner["delivery_days"] == min(deliveries):
rationale_bits.append("It also has the fastest delivery among the submitted quotes.")
if winner["warranty_months"] == max(warranties):
rationale_bits.append("It offers the strongest warranty among the submitted quotes.")
if winner["vendor"] == baseline["vendor"]:
rationale_bits.append("It is the lowest-price option under the selected quantity.")
return {
"ok": True,
"comparison_id": comparison_id,
"recommendation": {
"vendor": winner["vendor"],
"score": winner["scores"]["weighted_total"],
"normalized_total": winner["subtotal"],
"rationale": " ".join(rationale_bits),
},
"weights": {
"price": weights.price,
"delivery": weights.delivery,
"warranty": weights.warranty,
"normalized": {key: round(value, 4) for key, value in normalized_weights.items()},
},
"quotes": scored,
"created_at": _now_iso(),
}
def _runtime_skills_root(ctx: RunContext[Any]) -> str:
workspace = getattr(ctx, "_workspace", None)
prefixes = tuple(getattr(workspace, "write_prefixes", ()) or ())
if not prefixes:
outputs_prefix = getattr(workspace, "outputs_prefix", None)
prefixes = (outputs_prefix or "outputs/",)
prefix = str(prefixes[0]).strip("/")
return f"/{prefix}/{RUNTIME_SKILLS_DIR}" if prefix else f"/{RUNTIME_SKILLS_DIR}"
def _lower_is_better(value: float, values: list[float]) -> float:
min_value = min(values)
max_value = max(values)
if max_value == min_value:
return 1.0
return (max_value - value) / (max_value - min_value)
def _seed_runtime_skills(backend: Any, ctx: RunContext[Any]) -> list[str]:
"""Copy packaged DeepAgents skills into the invocation workspace.
def _higher_is_better(value: float, values: list[float]) -> float:
min_value = min(values)
max_value = max(values)
if max_value == min_value:
return 1.0
return (value - min_value) / (max_value - min_value)
DeepAgents loads skills from its backend, while source-controlled
``skills/`` folders live in the image. This bridge lets generated agents
ship reusable SKILL.md bundles without giving up durable A2A workspace
files.
def _parse_browser_documents(documents: list[BrowserQuoteDocument]) -> dict[str, Any]:
if not documents:
return {"ok": False, "code": "no_uploads", "message": "Upload at least one quote file."}
if len(documents) > MAX_UPLOADS:
return {"ok": False, "code": "too_many_uploads", "message": f"Upload at most {MAX_UPLOADS} files."}
quotes: list[dict[str, Any]] = []
for document in documents:
if document.media_type not in ALLOWED_UPLOAD_MEDIA_TYPES:
return {"ok": False, "code": "unsupported_media_type", "message": "Upload must be CSV, JSON, or plain text."}
try:
raw = base64.b64decode(document.data_base64, validate=True)
except Exception:
return {"ok": False, "code": "invalid_base64", "message": "Uploaded file data is not valid base64."}
if len(raw) > MAX_UPLOAD_BYTES:
return {"ok": False, "code": "upload_too_large", "message": f"Each upload must be {MAX_UPLOAD_BYTES} bytes or smaller."}
parsed = _parse_document_bytes(document.filename, document.media_type, raw)
if not parsed["ok"]:
return parsed
quotes.extend(parsed["quotes"])
return {"ok": True, "quotes": quotes[:MAX_QUOTES]}
def _parse_document_bytes(filename: str, media_type: str, raw: bytes) -> dict[str, Any]:
if len(raw) > MAX_UPLOAD_BYTES:
return {"ok": False, "code": "upload_too_large", "message": f"Upload must be {MAX_UPLOAD_BYTES} bytes or smaller."}
text = raw.decode("utf-8-sig", errors="replace")
try:
if media_type == "application/json" or filename.lower().endswith(".json"):
data = json.loads(text)
rows = data.get("quotes", data) if isinstance(data, dict) else data
if not isinstance(rows, list):
raise ValueError("JSON must be a list or contain a quotes list")
quotes = [QuoteInput.model_validate(row).model_dump() for row in rows]
elif media_type == "text/csv" or filename.lower().endswith(".csv"):
reader = csv.DictReader(io.StringIO(text))
quotes = [QuoteInput.model_validate(_coerce_quote_row(row)).model_dump() for row in reader]
else:
quotes = _parse_plain_text_quotes(text)
except Exception as exc:
return {"ok": False, "code": "quote_parse_failed", "message": f"Could not parse quote upload: {exc}"}
if not quotes:
return {"ok": False, "code": "no_quotes_found", "message": "No quote rows were found in the upload."}
return {"ok": True, "quotes": quotes}
def _coerce_quote_row(row: dict[str, Any]) -> dict[str, Any]:
aliases = {
"vendor": ["vendor", "supplier", "name"],
"quantity": ["quantity", "qty"],
"unit_price": ["unit_price", "price", "unit price", "unitPrice"],
"delivery_days": ["delivery_days", "delivery", "delivery days", "lead_time", "lead time"],
"warranty_months": ["warranty_months", "warranty", "warranty months"],
}
normalized = {str(k).strip().lower(): v for k, v in row.items()}
out: dict[str, Any] = {}
for target, names in aliases.items():
for name in names:
if name.lower() in normalized and normalized[name.lower()] not in (None, ""):
out[target] = normalized[name.lower()]
break
return out
def _parse_plain_text_quotes(text: str) -> list[dict[str, Any]]:
quotes: list[dict[str, Any]] = []
for line in text.splitlines():
if not line.strip():
continue
parts = [part.strip() for part in re.split(r"[,;|]", line) if part.strip()]
if len(parts) >= 5:
quotes.append(
QuoteInput.model_validate(
{
"vendor": parts[0],
"quantity": parts[1],
"unit_price": parts[2],
"delivery_days": parts[3],
"warranty_months": parts[4],
}
).model_dump()
)
return quotes
@contextmanager
def _db_conn() -> Any:
url = os.environ.get("DATABASE_URL")
if not url or psycopg is None:
yield None
return
conn = psycopg.connect(url, row_factory=dict_row)
try:
yield conn
conn.commit()
finally:
conn.close()
async def _save_comparison(tenant_key: str, payload: dict[str, Any]) -> None:
key = (tenant_key, payload["comparison_id"])
with _db_conn() as conn:
if conn is None:
_LOCAL_COMPARISONS[key] = dict(payload)
return
with conn.cursor() as cur:
cur.execute(
"""
root = Path(__file__).parent / "skills"
if not root.exists():
return []
runtime_skills_root = _runtime_skills_root(ctx)
uploads: list[tuple[str, bytes]] = []
for path in root.rglob("*"):
if path.is_file():
rel = path.relative_to(root).as_posix()
uploads.append((runtime_skills_root + rel, path.read_bytes()))
if uploads:
backend.upload_files(uploads)
return [runtime_skills_root]
return []
INSERT INTO quote_comparisons
(tenant_key, comparison_id, recommended_vendor, score, normalized_total, payload, updated_at)
VALUES (%s, %s, %s, %s, %s, %s, NOW())
ON CONFLICT (tenant_key, comparison_id) DO UPDATE SET
recommended_vendor = EXCLUDED.recommended_vendor,
score = EXCLUDED.score,
normalized_total = EXCLUDED.normalized_total,
payload = EXCLUDED.payload,
updated_at = NOW()
""",
(
tenant_key,
payload["comparison_id"],
payload["recommendation"]["vendor"],
payload["recommendation"]["score"],
payload["recommendation"]["normalized_total"],
json.dumps(payload),
),
)
def _last_message_text(state: dict[str, Any]) -> str:
messages = state.get("messages") or []
if not messages:
return json.dumps(state, default=str)
async def _load_comparison(tenant_key: str, comparison_id: str) -> dict[str, Any] | None:
key = (tenant_key, comparison_id)
with _db_conn() as conn:
if conn is None:
return _LOCAL_COMPARISONS.get(key)
with conn.cursor() as cur:
cur.execute(
"""
SELECT payload
FROM quote_comparisons
WHERE tenant_key = %s AND comparison_id = %s
""",
(tenant_key, comparison_id),
)
row = cur.fetchone()
if not row:
return None
payload = row["payload"]
return payload if isinstance(payload, dict) else json.loads(payload)
content = getattr(messages[-1], "content", None)
if isinstance(content, str):
return content
if isinstance(content, list):
parts: list[str] = []
for item in content:
if isinstance(item, dict):
text = item.get("text") or item.get("content")
if text:
parts.append(str(text))
elif item:
parts.append(str(item))
return "\n".join(parts) if parts else json.dumps(content, default=str)
return str(content or messages[-1])
async def _persist_receipt(
*,
tenant_key: str,
comparison_id: str,
skill_name: str,
input_payload: dict[str, Any],
result_payload: dict[str, Any],
status: str,
started_at: str,
) -> dict[str, Any]:
receipt = {
"receipt_id": str(uuid.uuid4()),
"agent": QuoteJudgeStudioV1.name,
"agent_version": QuoteJudgeStudioV1.version,
"skill": skill_name,
"comparison_id": comparison_id,
"status": status,
"started_at": started_at,
"completed_at": _now_iso(),
"input_hash": _hash_json(input_payload),
"result_hash": _hash_json(result_payload),
}
with _db_conn() as conn:
if conn is None:
_LOCAL_RECEIPTS.append({"tenant_key": tenant_key, **receipt})
return receipt
with conn.cursor() as cur:
cur.execute(
"""
INSERT INTO quote_execution_receipts
(tenant_key, comparison_id, receipt_id, skill_name, status, input_hash,
result_hash, payload, created_at)
VALUES (%s, %s, %s, %s, %s, %s, %s, %s, NOW())
""",
(
tenant_key,
comparison_id,
receipt["receipt_id"],
skill_name,
status,
receipt["input_hash"],
receipt["result_hash"],
json.dumps(receipt),
),
)
return receipt
def _hash_json(payload: dict[str, Any]) -> str:
encoded = json.dumps(payload, sort_keys=True, separators=(",", ":"), default=str).encode("utf-8")
return hashlib.sha256(encoded).hexdigest()
def _now_iso() -> str:
return datetime.now(timezone.utc).replace(microsecond=0).isoformat()