Polymarket launches instant deposits on the Bitcoin Lightning Network and integrates the Spark protocol.

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According to Jinse Finance, on July 8, the prediction market platform Polymarket announced support for instant, self-custodial deposits via the Bitcoin Lightning Network, powered by the Spark protocol. Compared to the previous on-chain deposit method that required waiting for 3 to 6 block confirmations, taking about 10 to 60 minutes, the new solution can achieve settlement in seconds, lowering the deposit threshold and transaction costs.
According to the introduction, Spark can perform checks on double-spending risk, fees, and Replace-by-Fee (RBF) at the time of transaction broadcast, achieving "zero-confirmation" deposits. It also supports on-chain, Lightning Network, and stablecoin payment channels, eliminating the need for the platform to operate its own Lightning Network nodes.
Polymarket stated that this move will further improve the capital efficiency of Bitcoin users and enhance its competitiveness against rival Kalshi.
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