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doc: add disclaimer highlighting shortcomings of the basic multisig example

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Michael Dietz 2021-09-03 13:42:05 -05:00
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@ -143,6 +143,14 @@ are lexicographically ordered as described in BIP67.
For a good example of a basic M-of-N multisig between multiple participants using descriptor
wallets and PSBTs, as well as a signing flow, see [this functional test](/test/functional/wallet_multisig_descriptor_psbt.py).
Disclaimers: It is important to note that this example serves as a quick-start and is kept basic for readability. A downside of the approach
outlined here is that each participant must maintain (and backup) two separate wallets: a signer and the corresponding multisig.
It should also be noted that privacy best-practices are not "by default" here - participants should take care to only use the signer to sign
transactions related to the multisig. Lastly, it is not recommended to use anything other than a Bitcoin Core descriptor wallet to serve as your
signer(s). Other wallets, whether hardware or software, likely impose additional checks and safeguards to prevent users from signing transactions that
could lead to loss of funds, or are deemed security hazards. Conforming to various 3rd-party checks and verifications is not in the scope of this example.
The basic steps are:
1. Every participant generates an xpub. The most straightforward way is to create a new descriptor wallet which we will refer to as