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Questions tagged [ark]

Ark is a proposed Layer 2 protocol for Bitcoin that uses the concept of virtual UTXOs.

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2 votes
1 answer
112 views

How are the connectors batched in Ark pool transactions?

According to https://www.arkpill.me/deep-dive, pool transactions contain 2 main outputs related to the protocol: The vTXOs output The connectors output I understand that vTXOs output is a partially ...
1 vote
1 answer
94 views

How does collaborative exit work in Ark?

It’s not clear for me how a collaborative exit works, in particular how atomicity is achieved. I would assume the ASP will fund an on-chain transaction, paying to Alice, in return for a VTXO forfeit ...
3 votes
1 answer
57 views

If I own a vtxo of 10000 sats, can I leave the ark only for 5000 sats?

Let's say somebody sent me 10000 sats offchain to get me on board and I want to take back onchain (unilateral exit) only part of them, like for example 5000 sats. I could send 5000 sats to another ...
2 votes
1 answer
41 views

Why the difference in sats on Collaborative Connector Closures?

According to https://www.arkpill.me/deep-dive, the value added to X is 240 sats when dealing with 1, 10 or 100 sats coins, but 280 sats when dealing with >100 sats coins. Why?
4 votes
1 answer
102 views

What's the mechanism preventing ASP to steal small virtual utxos on Ark?

According to https://www.arkpill.me/, a vUTXO owner is able to: Send the vUTXO with ASP collaboration. Unilaterally redeem the vUTXO using the pre-signed set of redeem transactions. If the vUTXO ...
4 votes
1 answer
222 views

How would the transaction chains created Ark pool transactions work given current mempool policy?

If I understood Ark correctly, pool transactions (which are on-chain transactions) are connected, as the output of pool transaction A is used as an input of the pool transaction A+1. If so, how can ...
1 vote
1 answer
99 views

Clarification on Ark pool transaction inputs

This is the definition of a pool transaction taken from https://arkpill.me/deep-dive: Pool transactions are created by Ark service providers perpetually every 5 seconds, which are effectively blinded,...
0 votes
0 answers
26 views

What does this diagram mean? [duplicate]

On this answer Steven Roose used the following diagram: What this exactly means? Here is my take: In a shared UTXO of 4 participants (A, B, C and D), each will receive a redeem transaction that they ...
3 votes
1 answer
163 views

How does the unilateral exit process in Ark work?

It's been told here that the cost of a unilateral exit depends on the number of leaves of the shared vtxo tree, which determines the number of transactions one has to broadcast to complete the process....
3 votes
1 answer
161 views

How many recipients can fit in a single Ark shared output?

It's the only boundary the taproot/MAST limitation of 128 levels of the tree, ie. 2^128?
3 votes
1 answer
87 views

How many transactions go on-chain if a user unilaterally exits from an Ark?

In Ark, if Alice decides to unilaterally exit will this means the entire tree must be revealed? How is congestion control handled?