Set anti-fee-sniping locktime (exact-tip) on bitcoin sends - #3385
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Set anti-fee-sniping locktime (exact-tip) on bitcoin sends#3385bc1cindy wants to merge 1 commit into
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Current tip (exact-tip) via shared helper, wired into normal sends (path A) and payjoin/PSBT (path B). 0 when unsynced. Converges with the exact-tip cluster (payjoin-cli, ldk-node, Bull Bitcoin) and skips the ~10% backdate.
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CI fails because it depends on cake-tech/bitcoin_base#13 |
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Cake sets
nLockTime = 0on all BTC txs — no anti-fee-sniping, and a unique fingerprint (payjoins especially).Set it to the current tip (exact-tip) via a shared helper, wired into both locktime-defaulting paths:
BitcoinTransactionBuilder(normal sends) andPSBTTransactionBuild/PsbtV2viasetGlobalFallbackLocktime(payjoin originalPsbt).0when unsynced.Converges with the exact-tip cluster (payjoin-cli, ldk-node, Bull Bitcoin) and Core's default for externally-constructed txs, and takes Cake off the
0fingerprint. Skips the ~10% backdate Core/Electrum apply for delayed-broadcast privacy — a contested, declining signal that doesn't apply in payjoin.depends on cake-tech/bitcoin_base#13 · closes #3361