View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0007937 | Taler | wallet-core | public | 2023-09-14 15:11 | 2023-12-24 06:29 |
| Reporter | sebasjm | Assigned To | Christian Grothoff | ||
| Priority | none | Severity | feature | Reproducibility | always |
| Status | closed | Resolution | won't fix | ||
| Product Version | git (master) | ||||
| Target Version | 0.9.4 | Fixed in Version | 0.9.4 | ||
| Summary | 0007937: wallet should be able to convert lower denom coins into high denom coins | ||||
| Description | in an acceptable exchange smaller coins have higher relative fee than big denoms this will impact the user after some time: it will perceive higher fees some things to consider to make the scenario less probable: * since fee is in the order of cents, reducing the tx fee for the customer makes this scenario less probable (STEFAN curves) * if the merchant accepts to pay some fee then the wallet has a margin to use smaller coins Still, using the wallet for a long period will lead to small coins due to random prices and change. what the wallet could do is send all the fresh-and-small coins to the exchange for the exact amount of a bigger coin and receive one new fresh coin. this operation: * is not something interesting for the customer (no need to show as a tx) * should trigger automatically (maybe before doing a payment) * is naturally limited, it can't be done indefinitely many time since is always converting from lower to higher denoms and converge to the highest denom (it can be potentially for free) | ||||
| Tags | No tags attached. | ||||
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I disagree, this should not be necessary if the coin does reasonable coin selection on payments. |
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Furthermore, it is dangerous as it may create (even accidentally!) a link between transactions. |
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* exchange: denoms $1 and $0.1 , all fee zero except deposit fee 0.01 * wallet withdraws 9 coins of $1 * merchant sells at $0.9 * after buying 9 times, the wallet will have `$0.1 * 9` coins * the 10th payment will cost 10% in fee instead of 1% |
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Only because of the *extreme* denomination structure of demo. Try the same with the canonical binary distribution of denominations. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2023-09-14 15:11 | sebasjm | New Issue | |
| 2023-09-14 15:11 | sebasjm | Status | new => assigned |
| 2023-09-14 15:11 | sebasjm | Assigned To | => Florian Dold |
| 2023-09-14 15:17 | Christian Grothoff | Note Added: 0020511 | |
| 2023-09-14 15:18 | Christian Grothoff | Note Added: 0020512 | |
| 2023-09-14 15:18 | Christian Grothoff | Assigned To | Florian Dold => |
| 2023-09-14 15:18 | Christian Grothoff | Priority | normal => none |
| 2023-09-14 15:18 | Christian Grothoff | Status | assigned => feedback |
| 2023-09-14 16:36 | sebasjm | Note Added: 0020513 | |
| 2023-09-14 16:36 | sebasjm | Status | feedback => new |
| 2023-09-14 16:37 | sebasjm | Status | new => feedback |
| 2023-09-14 16:43 | Christian Grothoff | Note Added: 0020514 | |
| 2023-12-24 06:29 | Christian Grothoff | Assigned To | => Christian Grothoff |
| 2023-12-24 06:29 | Christian Grothoff | Status | feedback => closed |
| 2023-12-24 06:29 | Christian Grothoff | Resolution | open => won't fix |
| 2023-12-24 06:29 | Christian Grothoff | Fixed in Version | => 0.9.4 |
| 2023-12-24 06:29 | Christian Grothoff | Product Version | => git (master) |
| 2023-12-24 06:29 | Christian Grothoff | Target Version | post-1.0 => 0.9.4 |
