79 lines
2.6 KiB
Python
79 lines
2.6 KiB
Python
import requests
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import json
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GAMMA = "https://gamma-api.polymarket.com"
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CLOB = "https://clob.polymarket.com"
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def parse_jsonish_list(v):
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if v is None:
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return []
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if isinstance(v, list):
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return v
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if isinstance(v, str):
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return json.loads(v)
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return []
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def get_market_by_slug(slug: str):
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r = requests.get(f"{GAMMA}/markets/slug/{slug}", timeout=20)
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r.raise_for_status()
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return r.json()
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def get_best_price(token_id: str, side: str) -> float | None:
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# side: "buy" => best bid, "sell" => best ask
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r = requests.get(f"{CLOB}/price", params={"token_id": token_id, "side": side}, timeout=20)
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r.raise_for_status()
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p = r.json().get("price")
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return float(p) if p is not None else None
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def get_mid_or_fallback(token_id: str):
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bid = get_best_price(token_id, "buy")
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ask = get_best_price(token_id, "sell")
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if bid is None and ask is None:
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return None, bid, ask, None
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# 如果只拿到一侧，就退化
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if bid is None:
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return ask, bid, ask, None
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if ask is None:
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return bid, bid, ask, None
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spread = ask - bid
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mid = (bid + ask) / 2
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return mid, bid, ask, spread
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def web_like_up_down(slug: str, decimals=0):
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m = get_market_by_slug(slug)
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outcomes = [str(x) for x in parse_jsonish_list(m.get("outcomes"))]
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token_ids = [str(x) for x in parse_jsonish_list(m.get("clobTokenIds"))]
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token_map = dict(zip(outcomes, token_ids))
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up_id = token_map.get("Up") or token_map.get("Yes") or token_ids[0]
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down_id = token_map.get("Down") or token_map.get("No") or token_ids[1]
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up_mid, up_bid, up_ask, up_spread = get_mid_or_fallback(up_id)
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dn_mid, dn_bid, dn_ask, dn_spread = get_mid_or_fallback(down_id)
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if up_mid is None or dn_mid is None:
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return {"error": "missing price", "up": (up_mid, up_bid, up_ask), "down": (dn_mid, dn_bid, dn_ask)}
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# 归一化（避免因为点差导致 up+down != 1）
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s = up_mid + dn_mid
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up_pct = round(up_mid / s * 100, decimals)
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dn_pct = round(dn_mid / s * 100, decimals)
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return {
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"question": m.get("question"),
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"market_id": m.get("id"),
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"slug": m.get("slug"),
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"up_pct": up_pct,
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"down_pct": dn_pct,
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"debug": {
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"up": {"token_id": up_id, "bid": up_bid, "ask": up_ask, "mid_used": up_mid, "spread": up_spread},
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"down":{"token_id": down_id, "bid": dn_bid, "ask": dn_ask, "mid_used": dn_mid, "spread": dn_spread},
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"note": "网页通常用 mid；若点差>0.10 则可能改用 last trade price。"
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}
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}
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if __name__ == "__main__":
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print(web_like_up_down("eth-updown-15m-1767069900", decimals=0))
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