Wallet Policies for Descriptor Wallets

The five-minute read

One action, walked through

1. Open BIP 388 and read the status line before the examples.
2. Write down the rule in one sentence. A fair version of that sentence is: Software wallets and hardware signing devices typically partition funds into separate "accounts".
3. Name the object that changes: Wallet Policies for Descriptor Wallets.
4. Ask what an old client, an old contract, or an offline counterparty does. If the document is silent, the silence is part of the design.

The argument, unpacked

What has to be true

• You are implementing BIP 388 at the status the text itself states: Complete.
• The object that has to change is Wallet Policies for Descriptor Wallets. A neighbouring document with a similar name is not this one.
• Constants in the text can be superseded by a later fork. Cite the EIP number and the fork you mean.

What happened after the paper

The source marks this complete. That is a statement about the text, not a promise that every wallet or node has shipped it. Later documents can narrow, replace, or ignore this one. Cite the number you mean.

What to check before you use the idea

• What does Wallet Policies for Descriptor Wallets charge, reject, or redefine on the first touch versus a later one?
• Does a reverted subcall roll the change back?
• Can you point at the object in a client: Wallet Policies for Descriptor Wallets?

Terms

BIP 388

The public text titled Wallet Policies for Descriptor Wallets.

Complete

The document's own label for how finished the text is. It is not a market fact.

The problem the paper names

An underpriced or ambiguous EVM rule is not a feature. It is a block that takes longer than the gas limit claimed, or a client that disagrees about the result.

What the design proposes

• Software wallets and hardware signing devices typically partition funds into separate "accounts".
• When signing or visualizing a transaction, aggregate flows of funds of all accounts affected by the transaction may (and should) be displayed to the user.
• Wallet policies build on top of output script descriptors to represent such accounts in a compact, reviewable way.

How the mechanism is specified

• Taken from the specification, the next constraint is: When signing or visualizing a transaction, aggregate flows of funds of all accounts affected by the transaction may (and should) be displayed to the user.
• Locate Wallet Policies for Descriptor Wallets in BIP 388 and apply it to one transaction or call.
• Then check the failure the class of rule always has: a node that did not upgrade, a reverted call, a replayed signature, or a peer that does not speak the message.

What this page does not treat as proven

• A gas or opcode change is not a throughput benchmark. It is a relative price and a validity rule.
• Constants in the text can be superseded by a later fork. Cite the EIP number and the fork you mean.
• The source marks this complete. That is a statement about the text, not a promise that every wallet or node has shipped it.

Why a venture studio still reads it

Use BIP 388 when a pitch says 'Wallet Policies for Descriptor Wallets' without saying whether the rule is consensus, policy, or an interface. The number is the citation. The pitch is not.