Polymarket, the world’s largest prediction market, has switched on on the spot bitcoin deposits over the Lightning Community, with new rails powered by the Spark protocol crediting funds in underneath one second.
Opening up new avenues
The improve replaces a funding circulate that beforehand took anyplace from 10 to 60 minutes, now settling deposits virtually immediately with near-zero charges.
It marks a pointy departure from the usual onchain bitcoin deposits Polymarket added in October 2025, which required three to 6 community confirmations earlier than crediting an account.
These onchain deposits carried a better minimal reflecting bridging prices, however the Lightning route settles in seconds whereas conserving minimums low.
Tether CEO Paolo Ardoino, whose firm points USDT, praised the underlying expertise, describing it as:
“A path to programmable Bitcoin over Lightning.”
How Spark’s rails work
Spark was developed by Lightspark and is constructed on statechain expertise, a design that strikes bitcoin possession off the primary chain whereas preserving person custody.
The protocol validates a bitcoin transaction the second it’s broadcast, checking for double-spend danger, price adequacy, and replace-by-fee flags earlier than crediting the deposit.
The construction additionally lightens Polymarket’s operational load, because it not has to handle affirmation thresholds or run its personal Lightning nodes.
Deposits stay self-custodial, with every pockets tied to the person’s personal keys, so merchants hold management of their funds till they place a commerce.
Pockets suppliers together with Breez, Xverse, and Cake are additionally constructing on the protocol.
A funding race with Kalshi
The improve lands in the midst of an intensifying battle for prediction market quantity, with rival Kalshi posting $5.42 billion in April taker quantity, overtaking Polymarket’s $1.99 billion for the primary time because the sector’s month-to-month complete hit $8.6 billion.
Polymarket additionally lately unveiled perpetual futures buying and selling for U.S. markets, broadening its providing past easy occasion contracts as it really works to reclaim floor.