On-Chain Fills

Each row is one OrderFilled event from Predict.fun's exchange contracts on BNB Smart Chain. The columns are the Polymarket on-chain fills columns plus market_id.

Data type: onchain_fills (predict_fun)

One file per market per UTC day of block time, only for days the market has fills. Only finalized blocks are read.

Schema

Field	Type	Description
market_id	int64	Predict.fun numeric market id.
timestamp	timestamp[us]	Block time, millisecond precision.
maker	string	Maker address, lowercase.
taker	string	Taker address, lowercase. When it is one of Predict.fun's exchange contracts (below), the row is the taker order's own fill.
outcome	string	Outcome label of the token, for example Yes, Up, Over 13.5 or a team name.
maker_side	string	BUY: the order pays USDT and receives outcome tokens. SELL: the reverse.
taker_side	string	The opposite of maker_side.
price	double	USDT amount / token amount, from 0 to 1.
usd_amount	double	USDT amount.
token_amount	double	Outcome token amount.
transactionHash	string	Transaction hash, lowercase hex.
_log_index	int64	Log index of the event within the block.

• One match writes one row per maker order, plus one row for the taker order itself, whose taker is the exchange contract and whose token_amount is the sum of the maker rows. To count volume, drop rows whose taker is one of the contracts below, or every match is counted twice.
• A maker row can be on the other outcome and on the same side as the taker (a mint or merge match): a maker "BUY No @ 0.40" is economically selling Yes @ 0.60 to the taker.
• Rows are in chain order, (timestamp, _log_index). (transactionHash, _log_index) is unique.
• Not included: block number, contract address, order hash and fees. Look them up on chain by transactionHash.

Predict.fun's exchange contracts:

Contract	Address
Standard	0x8bc070bedab741406f4b1eb65a72bee27894b689
Standard NegRisk	0x365fb81bd4a24d6303cd2f19c349de6894d8d58a
Yield-bearing	0x6beb5a40c032afc305961162d8204cda16decfa5
Yield-bearing NegRisk	0x8a289d458f5a134ba40015085a8f50ffb681b41d