View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0004092 | Taler | wallet (WebExtension) | public | 2015-12-09 17:14 | 2019-12-26 21:37 |
| Reporter | Marcello Stanisci | Assigned To | Marcello Stanisci | ||
| Priority | normal | Severity | major | Reproducibility | N/A |
| Status | closed | Resolution | fixed | ||
| Product Version | 0.0 | ||||
| Target Version | 0.0 | ||||
| Summary | 0004092: payment algorithm improvement (?) | ||||
| Description | As of now, the algorithm works by ranking the coins from the "most convenient" to the "least convenient" coin and then it accumulates coins in order to achieve *at least* the price to pay. For example, say the price to pay is KUDOS 10.01, and the coins rank is 1) KUDOS 10 2) KUDOS 2 3) KUDOS 0.01 The wallet will send the payment by packing [KUDOS 10, KUDOS 2] The situation gets worse if the rank is 1) KUDOS 10 2) KUDOS 10 3) KUDOS 0.01 | ||||
| Tags | No tags attached. | ||||
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Need to include the refresh cost selectively. For coin value <= contract amount (with fees), the refresh cost is zero (i.e. the 10 EUR coin when it is picked). For coin value > contract amount (with fees), the refresh cost needs to be included ("penalty"). As we select coins to pay, we need to re-sort the array after each coin is selected. So initially, refresh costs are zero (for the example). We pick 10 EUR. Then, refresh costs are applied. 10/2 EUR coins now have a refresh cost, the 0.01 ct coin does NOT. If refresh cost penalty is sufficiently high, this means we pick the 0.01ct coin. Note that we can include both the financial cost of the refresh (fee), as well as a "performance" cost (we need to do extra crypto, extra latency, extra bandwidth). |
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Refresh costs include: * melt fee (melt the old coin), PLUS * withdraw fees for the new coins (i.e. the 2 EUR coin may create several withdraw fees for the change given, i.e. for the example we may return 1 EUR, 50 ct, 25 ct and 24 1ct change pieces, so possibly like 27 withdraw fees in addition to the melt fee!) * and then we could also budget for the performance cost |
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Further versions of the wallet may *suggest* the user to withdraw 10 KUDOS, in case he has 10 KUDOS made by little pieces. |
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algorithm tested. Deposit fee to be included in the computation. |
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deposit fee accounting added. To test. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2015-12-09 17:14 | Marcello Stanisci | New Issue | |
| 2015-12-09 17:14 | Marcello Stanisci | Status | new => assigned |
| 2015-12-09 17:14 | Marcello Stanisci | Assigned To | => Marcello Stanisci |
| 2015-12-17 11:54 | Christian Grothoff | Note Added: 0010011 | |
| 2015-12-17 11:57 | Christian Grothoff | Note Added: 0010012 | |
| 2015-12-17 12:02 | Christian Grothoff | Product Version | => 0.0 |
| 2015-12-17 12:02 | Christian Grothoff | Target Version | => 0.0 |
| 2015-12-17 15:43 | Christian Grothoff | Severity | minor => major |
| 2015-12-17 15:47 | Christian Grothoff | Note Edited: 0010011 | |
| 2015-12-22 11:39 | Marcello Stanisci | Note Added: 0010025 | |
| 2015-12-22 17:32 | Marcello Stanisci | Note Added: 0010026 | |
| 2015-12-22 18:38 | Marcello Stanisci | Note Added: 0010027 | |
| 2015-12-22 18:38 | Marcello Stanisci | Status | assigned => resolved |
| 2015-12-22 18:38 | Marcello Stanisci | Resolution | open => fixed |
| 2015-12-25 10:48 | Christian Grothoff | Status | resolved => closed |
| 2019-12-26 21:37 | Florian Dold | Category | wallet (browser-based) => wallet (WebExtensions) |
| 2023-04-13 20:37 | Florian Dold | Category | wallet (WebExtensions) => wallet (WebExtension) |
