[Polymarket Launches Instant Bitcoin Lightning Network Deposits, Integrates Spark Protocol] BlockBeats News, July 8: 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, which required waiting for 3 to 6 block confirmations and took approximately 10 to 60 minutes, the new solution enables near-instant deposits while lowering deposit thresholds and transaction costs. According to the announcement, Spark performs checks for double-spending risks, transaction fees, and Replace-by-Fee (RBF) during transaction broadcasting, enabling "zero-confirmation" deposits. It also supports on-chain, Lightning Network, and stablecoin payment channels without requiring the platform to operate its own Lightning Network nodes. Polymarket stated that this move will further enhance Bitcoin users' capital efficiency and strengthen its competitiveness against rival Kalshi. [Original Link]