Bybit fetch_funding_rate_history returns different time periods based on limit parameter #27745
Description
Operating System
Linux
Programming Language
Python
CCXT Version
4.5.10
Description
Bybit's fetch_funding_rate_history exhibits inconsistent behavior where the limit parameter determines which time period is returned, causing gaps in historical data retrieval.
Issue: When fetching funding rate history from a specific since timestamp, different limit values return completely different time periods instead of just limiting the number of results.
Test Case:
import ccxt
import pandas as pd
exchange = ccxt.bybit()
exchange.verbose = True
symbol = "ZRX/USDT:USDT"
since = int(pd.Timestamp("2025-11-01T00:00:00Z").timestamp() * 1000)
# Test different limits
for limit in [100, 200, 300]:
bars = exchange.fetch_funding_rate_history(symbol, since=since, limit=limit)
if bars:
print(f"Limit {limit}: {len(bars)} bars from {bars[0]['datetime']} to {bars[-1]['datetime']}")Actual Results:
Limit 100: 100 bars from 2025-11-01T08:00:00.000Z to 2025-12-04T08:00:00.000Z
Limit 200: 200 bars from 2025-12-22T16:00:00.000Z to 2026-01-06T16:00:00.000Z
Limit 300: 200 bars from 2026-01-17T13:00:00.000Z to 2026-01-25T20:00:00.000Z
Expected Results:
All limits should return data starting from the same since timestamp (2025-11-01), with higher limits simply returning more consecutive records.
Impact:
- Pagination fails to retrieve complete historical data
- Forward pagination with
paginationDirection: "forward"skips chunks of data
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