Re: [bitcoin-dev] New Silent Payment version

[woltx <woltx@protonmail.com>]

The current Silent Payment implementation uses the standard Taproot script (Segwit V1).

This does not in any way affect the consensus or auditability rules.




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------- Original Message -------
On Wednesday, August 17th, 2022 at 11:21 PM, <damian@willtech.com.au> wrote:


> Let's be clear, if Bitcoin allows secret payments that cannot be
> publicly audited then they have exceeded the original consensus that
> gave Bitcoin fungibility and I will be publicly disavowing Bitcoin and
> advocating for a full sell down. Why don't you resurrect Monero. -DA.
> 
> On 2022-08-17 10:08, woltx via bitcoin-dev wrote:
> 
> > PR #24897 (https://github.com/bitcoin/bitcoin/pull/24897) has been
> > updated with a new silent payment version, which eliminates some
> > manual steps from the previous version (such as the need to set the
> > `keypool` to avoid costly multi-key scan).
> > 
> > This is achieved by using a new descriptor type ("sp()") that has no
> > range and contains exactly one key.
> > 
> > Example: "sp(cQq73sG9....JD51uaRD)#9llg6xjm"
> > 
> > This descriptor introduces a new type of output: "silent-payment".
> > This output type returns a standard Taproot script (Segwit V1), but
> > with HRP changed from "bc" to "sp" on the mainnet (or "tsp" on
> > testnet and signet).
> > 
> > This output type will always generate the same address (unless another
> > "sp" descriptor is enabled on the same wallet).
> > 
> > $ ./src/bitcoin-cli -signet getnewaddress '' 'silent-payment'
> > tsp1pfmjyl7ecpmx8yf8cu6g3ez36jy7s9mzuh5pdnal3k0n588uzgmfs4s4fws
> > 
> > To create a silent transaction, simply use the silent payment address
> > as one of the outputs.
> > 
> > The "send" RPC will automatically identify and tweak it.
> > 
> > The transaction can contain multiple outputs, combining silent and
> > standard addresses.
> > 
> > I have written a step by step signet tutorial so reviewers can test
> > this new version easily.
> > 
> > https://gist.github.com/w0xlt/a7b498ac1ff14b8c292a22be789bd93f
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