Implicit Deletions and Improvements in Utreexo IBD
https://delvingbitcoin.org/t/implicit-deletions-and-improvements-in-utreexo-ibd/2881
The interesting idea is that Utreexo IBD can exploit something live validation normally can’t: during historical sync, you already know which outputs will eventually be spent. That means you can avoid inserting those outputs into the accumulator only to later download proofs and delete them, and instead build the accumulator as if those deletions had already happened. Combined with Swift Sync-style spentness hints that remain verifiable, this cuts a large chunk of Utreexo’s IBD proof overhead and also makes block processing much more parallel, potentially turning sync into a mostly bandwidth-bound problem even on low-end hardware.
https://stacker.news/items/1562634
m0wer
npub1w3…t4c5c
2026-09-05 09:51:13 UTC
Author Public Key
npub1w3vaxva0vcrx7pnvlpmede5smvafdl69xnu7ma82kaxl9us89zdsht4c5cSeen on
wss://nos.lolPublished at
2026-09-05 09:51:13 UTCEvent JSON
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"content": "Implicit Deletions and Improvements in Utreexo IBD\nhttps://delvingbitcoin.org/t/implicit-deletions-and-improvements-in-utreexo-ibd/2881\n\nThe interesting idea is that Utreexo IBD can exploit something live validation normally can’t: during historical sync, you already know which outputs will eventually be spent. That means you can avoid inserting those outputs into the accumulator only to later download proofs and delete them, and instead build the accumulator as if those deletions had already happened. Combined with Swift Sync-style spentness hints that remain verifiable, this cuts a large chunk of Utreexo’s IBD proof overhead and also makes block processing much more parallel, potentially turning sync into a mostly bandwidth-bound problem even on low-end hardware.\n\nhttps://stacker.news/items/1562634",
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