Polymarket, the crypto-native prediction market, has begun supporting on the spot Bitcoin deposits over the Lightning Network. The characteristic makes use of infrastructure from Spark, a Bitcoin protocol constructed for funds and stablecoins.
In a submit on X, Spark told customers they’ll deposit BTC to the platform with extra pace and extra privateness than the older methodology supplied.
The transfer extends a funding push that started in October 2025, when Polymarket switched on normal on-chain Bitcoin deposits. These deposits carried a wait: most on-chain Bitcoin transactions want three to 6 confirmations, a window of 10 to 60 minutes, earlier than a platform credit an account.
The on-chain route carried a better minimal deposit, a mirrored image of bridging prices. For a dealer who needs a place on a reside market, each the delay and the charge are a price.
Lightning and Spark shut the hole. Spark validates a Bitcoin transaction in the intervening time it broadcasts, checking for double-spend danger, charge adequacy, and replace-by-fee flags.
The protocol credit the deposit in below a second and absorbs the affirmation danger, a design Spark markets as zero-conf.
Polymarket doesn’t must handle affirmation thresholds or run its personal Lightning nodes; a single Spark SDK handles on-chain, Lightning, and stablecoin rails.
Spark retains deposits self-custodial. Every pockets ties to the person’s personal keys, so the protocol, not Polymarket, carries the operational load, and customers retain management of funds till a commerce.
Spark counts pockets suppliers reminiscent of Breez, Xverse, and Cake among the many groups constructing on the identical rails, and Tether chief Paolo Ardoino has praised the protocol as a path to programmable Bitcoin over Lightning.
Polymarket’s growth through the years
Timing issues for a corporation in a development part.
Based in 2020, Polymarket rose to prominence through the 2024 U.S. presidential election and has added Chainlink oracles, earnings markets, and a contemporary contest with regulated rival Kalshi.
Quicker, cheaper funding lowers the barrier for the Bitcoin holders who make up a big share of the crypto viewers, and it fingers Polymarket a contemporary reply to a rival that has pressed it on quantity.
