Polymarket has integrated Spark to support instant Bitcoin deposits over the Lightning Network, expanding funding options for users of the crypto-native prediction market. The integration allows users to deposit BTC directly into Polymarket through Lightning, with Spark providing the underlying Bitcoin payment infrastructure. Spark said the new deposit route is faster, cheaper and more private than standard on-chain Bitcoin transactions, with funds arriving in seconds rather than requiring the 30 minutes to an hour often associated with base-layer confirmation times. The move builds on Polymarket’s earlier rollout of ... (full story)