silent payments: BIP-352 send and receive for Liquid - #170
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Adds the Tweak Server client (/getinfo, /tweaks/:height, /filters/:height) with async and blocking variants, plus scan_block and BIP158 filter matching. This completes the receive path specified by the "Tweak Server" model: fetch tweaks → derive candidate scripts → match against the block filter → scan only on a match. Keys never leave the wallet. |
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Dropped the ELIP draft from this PR — the spec is being consolidated in ElementsProject/ELIPs#37, and this branch is better reviewed as a pure implementation. The blinding key derivation here already matches #37's LiquidSilentPayments/Blind tag. |
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ELIP draft for BIP-352 silent payments on Elements, plus the reference implementation in lwk_wollet::silent_payments. Passes the 28 official BIP-352 send/receive test vectors and end-to-end tests over real blinded Liquid transactions.