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Bitcoin Core v31.0 Adds Tor and I2P Support for Private Transaction Broadcast

Bitcoin Core v31.0 updates mempool handling for related transactions and adds private broadcast options via Tor and I2P, potentially changing acceptance, relay, and inclusion behavior for advanced Bitcoin transaction workflows.

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Summary

Bitcoin Core released v31.0 with mempool logic improvements and support for private transaction broadcast through Tor and I2P. The update changes how nodes evaluate related transactions for retention, relay, or inclusion, which may lead to different acceptance or rejection outcomes for users relying on Replace-by-Fee (RBF), Child-Pays-for-Parent (CPFP), Lightning Network, and complex or server-side wallets.

Terms & Concepts
  • mempool: A node’s pool of unconfirmed transactions that are being considered for relay and eventual inclusion in a block.
  • Tor: A privacy network that routes internet traffic through multiple relays to help obscure a user’s origin and activity.
  • I2P: An anonymous network layer designed to hide communication metadata and improve privacy for network traffic.