Conceptual model for asynchronous physical exchanges

[p.b.]

Hello,

I would like to share a conceptual model exploring the problem of asynchronous physical exchanges between parties who do not know each other and are not present at the same time.
The document proposes a possible architecture aiming to reduce some risks inherent to these exchanges while preserving anonymity, avoiding reliance on trusted intermediaries, and separating monetary settlement from physical state coordination.
The goal of the document is not to present a finished implementation but rather a conceptual framework open to discussion and technical critique.

Documents provided:

• French version (original) – complete document (Epasynchroneorigine)

• English version – Part 1 (TradEpasynchronepb1)

• English version – Part 2 (TradEpasynchronepb2)

https://github.com/pbasynch/asynchronous-physical-exchanges.git

The English version was translated from the French text. If any passage seems unclear in English, the French version may be used as the reference.

Feedback, criticism and technical comments are welcome.

[MarryWithBTC]

I have gone through the github file and read through, I have my concerns about the logistics intervention, but I'll have to go through carefully again.
You uploaded the write up as images and not as texts.

[Ucy]

Sounds like the lock would be internet connected or always online machine/electronic. Seems Futuristic, but i doubt has been invented yet.  A machine that's capable of full inspection or review to verify that a product is according to seller's description would be expensive, large, complex, to also be capable of reviewing almost all product type whether small or big, like from watches to cars. I think this is what humans can handle more effectively, but in much slower pace

So, you would ether combine humans and machines, or humans only for the reviews, and still ensure that the whole process or most of it meets your specifications: asynchronous, anonymous, trustless, no intermediary, decentralized, etc
If you want it so, then there has to be physical system for the whole process, and it possibly should be open to anyone to participate or should be permissionless.

 — Firstly, fund is escrowed by buyer after going through a product and the description of its condition. The product and the condition is sent to collection point with a minimum of two reputable witnesses to review and approve/disapprove it based to the condition. Then the buyer comes to the collection point to inspect it too, if it's according to the stated condition, escrowed bitcoin is released.  *Fund should not be released in cases like this until product condition is finally verified and approved by a minimum of 2 witnesses plus the buyer. One witness could be doing the verification while others approving or disapproving. If product fall short of standard, it's returned.

[p.b.]

MarryWithBTC

Thank you for your feedback and for taking the time to go through the document.

Of course, there is no problem if you would like to review it more carefully before sharing further thoughts, especially regarding the logistical part.
Regarding the PDF files, you are right: they were generated from a format that makes the text difficult to copy or select. I plan to make them available soon in a selectable text format to make reading, quoting, and analysis easier.

Thank you


Ucy

Thank you for your response and for your reflections on the model.

You are correct on one point: in this concept, the physical devices (such as lockers or deposit points) would indeed be permanently connected to the network and interact with the layer B infrastructure.
Regarding the machines capable of inspecting objects, I understand your remark. The idea is not to design a universal machine capable of analyzing every possible type of object (for example cars). In this model, devices could instead be specialized depending on the type or category of objects, using sensors and measurement methods adapted to those specific cases.

I also understand your suggestion of introducing human verification. However, one of the main goals of the model is precisely to limit human intervention in the process as much as possible. Introducing witnesses or human inspections reintroduces trusted third parties and reputation-based mechanisms, which this model specifically attempts to avoid in order to preserve properties such as anonymity, the absence of intermediaries, and decentralization.

You also mention that such a system would require a physical infrastructure open and accessible to participants. On this point I agree: the idea would be for the infrastructure to be usable by different actors, while the layer B registry remains open, distributed, and append-only.
Finally, thank you for proposing an alternative model. I understand the logic behind your approach. However, in this case it introduces several trusted third parties (the witnesses responsible for verifying the object), which is precisely one of the elements this model aims to avoid.

In addition, the fact that the buyer must physically inspect the object before the funds are released introduces certain limitations. In such a scenario, situations of collusion could arise, for example between some witnesses and the buyer, or between the buyer and actors present at the collection point. The buyer could potentially leave with the object or validate its conformity in circumstances that no longer truly guarantee a trustless or intermediary-free process.
Furthermore, in this type of mechanism the release of the escrow ultimately depends on a final action from the buyer. If the buyer never shows up to inspect the object, refuses to validate the transaction, or simply disappears, the escrow can remain locked and the exchange cannot be properly finalized. In the model proposed in this document, this type of blockage is specifically avoided through the introduction of time constraints, automatic conditions, and economic commitments between the actors, which helps reduce direct dependence on human decisions within the process.

Thank you again for your response and for your thought