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Concord streamlined its relay permission flow to prevent connection request overload and introduced key backup discovery. The client also fixed Cashu proof backfill truncation and added search indexing for event titles and names.
Mostro version 0.18.5 defaulted to NIP-44 encryption for gift wraps and added pre-signature checks on incoming events to mitigate expensive signature-validation attacks. It is also refining its two-out-of-three Cashu escrow system.
Matthew Vuk notes Arc payments only work within the same Arc server instance; cross-Arc payments or payments to non-Arc wallets default to Lightning, similar to Cashu mints using Lightning.
Matthew Vuk details how Bark enables Cashu mints to hold VTXOs as reserves, enhancing privacy and allowing verifiable proof of reserves through self-spending to a Noster pubkey.
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