# Silent Payments: Light Client Protocol

**URL:** <https://delvingbitcoin.org/t/silent-payments-light-client-protocol/891>\
**Category:** wg-silent-payments\
**Tags:** wallet\
**Created:** [May 21, 2024, 9:15am UTC](https://delvingbitcoin.org/t/silent-payments-light-client-protocol/891 "2024-05-21T09:15:50Z")\
**Posts on this page:** 1\
**Showing post:** 17

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**Author:** ![bitsagarob](https://delvingbitcoin.org/user_avatar/delvingbitcoin.org/bitsagarob/32/2329_2.png) [@bitsagarob](https://delvingbitcoin.org/u/bitsagarob)\
**Post date:** [September 24, 2026, 10:07pm UTC](https://delvingbitcoin.org/t/silent-payments-light-client-protocol/891/17 "2026-09-24T22:07:41Z")

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Post 3 asked for numbers on a taproot-only filter versus the stock BIP-158 filter. Here’s some data on every mainnet block from 709,656 to 965,089 =\> 255,434 blocks, no sampling.

| What the wallet downloads | Whole range | Per day |
| --- | --- | --- |
| BIP-158 basic filter | 5.78 GB | 2.84 MB |
| Taproot-only filter | 0.33 GB | 0.14 MB |
| Raw tweaks, 33 bytes per eligible tx | 6.20 GB | 3.40 MB |
| BlindBit v2 scanning payload | 15.08 GB | 8.04 MB |

Taproot-only is **17.63x** smaller than the basic filter, by era: 7.65x over 800,000 to 849,999, 23.61x over the last 10,000 blocks.

Encoded, not modelled: siphash-2-4, Golomb-Rice, P=19, M=784931. Two independently written implementations, agreement on all 255,434 blocks, each first proved byte-identical to Core’s basic filters. BIP-158 encodes an element set: 359,001,723 eligible taproot outputs carry 124,299,689 distinct x-only keys, with duplicates kept: 0.958 GB, 6.02x.

Post 1 also proposed a dust limit and cut-through, “pruning tweaks for transactions where all taproot UTXOs are spent”. Same range, spentness pinned at height 967,618:

| Filter | Restore payload | Share |
| --- | --- | --- |
| none | 15.08 GB | 100% |
| dust 546 | 13.70 GB | 90.8% |
| cut-through | 3.43 GB | 22.8% |
| cut-through + dust 546 | 2.57 GB | 17.0% |
| cut-through + dust 1000 | 0.48 GB | 3.2% |

> **[GitHub - bitsagarob/silentpayments-measurements](https://github.com/bitsagarob/silentpayments-measurements)**
>
> Contribute to bitsagarob/silentpayments-measurements development by creating an account on GitHub.

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