Prevent brokered sale of NFToken to owner (fix #4374) #4403
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ledhed2222
reviewed
Jan 31, 2023
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looks good, but can you change this to be against |
nixer89
previously approved these changes
Jan 31, 2023
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lgtm
As it seems, the fixUnburnableNFToken will include this PR (Amendment).
While it makes sense to merge multiple NFT related issued into one bigger Amendment, the initial name fixUnburnableNFToken suggests it only fixes the "non burnable NFToken" issue.
Would it make sense to rename the Amendment to make it clear that there are multiple NFT fixes included and not just the one?
WietseWind
previously approved these changes
Feb 1, 2023
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@ledhed2222, this commit is now rebased to sit atop |
intelliot
dismissed stale reviews from WietseWind and nixer89
The base branch was changed.
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I updated the PR's base branch to
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@intelliot, no damage from that change as far as I can see. |
intelliot
changed the title
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ledhed2222
approved these changes
Feb 6, 2023
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lgtm! merge when ready :) |
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Rebased to the current state of feature/nft-fixes. |
This was referenced Feb 13, 2023
kennyzlei
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Feb 13, 2023
Fixes #4374 It was possible for a broker to combine a sell and a buy offer from an account that already owns an NFT. Such brokering extracts money from the NFT owner and provides no benefit in return. With this amendment, the code detects when a broker is returning an NFToken to its initial owner and prohibits the transaction. This forbids a broker from selling an NFToken to the account that already owns the token. This fixes a bug in the original implementation of XLS-20. Thanks to @nixer89 for suggesting this fix.
kennyzlei
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Feb 13, 2023
Fixes #4374 It was possible for a broker to combine a sell and a buy offer from an account that already owns an NFT. Such brokering extracts money from the NFT owner and provides no benefit in return. With this amendment, the code detects when a broker is returning an NFToken to its initial owner and prohibits the transaction. This forbids a broker from selling an NFToken to the account that already owns the token. This fixes a bug in the original implementation of XLS-20. Thanks to @nixer89 for suggesting this fix. Signed-off-by: Kenny Lei <[email protected]>
kennyzlei
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Feb 13, 2023
Fixes #4374 It was possible for a broker to combine a sell and a buy offer from an account that already owns an NFT. Such brokering extracts money from the NFT owner and provides no benefit in return. With this amendment, the code detects when a broker is returning an NFToken to its initial owner and prohibits the transaction. This forbids a broker from selling an NFToken to the account that already owns the token. This fixes a bug in the original implementation of XLS-20. Thanks to @nixer89 for suggesting this fix.
kennyzlei
pushed a commit
that referenced
this pull request
Feb 13, 2023
Fixes #4374 It was possible for a broker to combine a sell and a buy offer from an account that already owns an NFT. Such brokering extracts money from the NFT owner and provides no benefit in return. With this amendment, the code detects when a broker is returning an NFToken to its initial owner and prohibits the transaction. This forbids a broker from selling an NFToken to the account that already owns the token. This fixes a bug in the original implementation of XLS-20. Thanks to @nixer89 for suggesting this fix.
ximinez
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Feb 15, 2023
* upstream/develop: Rename to fixNonFungibleTokensV1_2 and some cosmetic changes (XRPLF#4419) Only account specified as destination can settle through brokerage: (XRPLF#4399) Prevent brokered sale of NFToken to owner: (XRPLF#4403) Fix 3 issues around NFToken offer acceptance (XRPLF#4380) Allow NFT to be burned when number of offers is greater than 500 (XRPLF#4346) Add fixUnburnableNFToken feature (XRPLF#4391) Change default vote on fixUniversalNumber from yes to no (XRPLF#4414)
ximinez
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Feb 15, 2023
* upstream/develop: Rename to fixNonFungibleTokensV1_2 and some cosmetic changes (XRPLF#4419) Only account specified as destination can settle through brokerage: (XRPLF#4399) Prevent brokered sale of NFToken to owner: (XRPLF#4403) Fix 3 issues around NFToken offer acceptance (XRPLF#4380) Allow NFT to be burned when number of offers is greater than 500 (XRPLF#4346) Add fixUnburnableNFToken feature (XRPLF#4391) Change default vote on fixUniversalNumber from yes to no (XRPLF#4414)
ximinez
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Feb 15, 2023
* upstream/develop: Rename to fixNonFungibleTokensV1_2 and some cosmetic changes (XRPLF#4419) Only account specified as destination can settle through brokerage: (XRPLF#4399) Prevent brokered sale of NFToken to owner: (XRPLF#4403) Fix 3 issues around NFToken offer acceptance (XRPLF#4380) Allow NFT to be burned when number of offers is greater than 500 (XRPLF#4346) Add fixUnburnableNFToken feature (XRPLF#4391) Change default vote on fixUniversalNumber from yes to no (XRPLF#4414)
ximinez
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Feb 15, 2023
* upstream/develop: Rename to fixNonFungibleTokensV1_2 and some cosmetic changes (XRPLF#4419) Only account specified as destination can settle through brokerage: (XRPLF#4399) Prevent brokered sale of NFToken to owner: (XRPLF#4403) Fix 3 issues around NFToken offer acceptance (XRPLF#4380) Allow NFT to be burned when number of offers is greater than 500 (XRPLF#4346) Add fixUnburnableNFToken feature (XRPLF#4391) Change default vote on fixUniversalNumber from yes to no (XRPLF#4414)
ximinez
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Feb 15, 2023
* upstream/develop: Rename to fixNonFungibleTokensV1_2 and some cosmetic changes (XRPLF#4419) Only account specified as destination can settle through brokerage: (XRPLF#4399) Prevent brokered sale of NFToken to owner: (XRPLF#4403) Fix 3 issues around NFToken offer acceptance (XRPLF#4380) Allow NFT to be burned when number of offers is greater than 500 (XRPLF#4346) Add fixUnburnableNFToken feature (XRPLF#4391) Change default vote on fixUniversalNumber from yes to no (XRPLF#4414)
ximinez
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Feb 15, 2023
* upstream/develop: Rename to fixNonFungibleTokensV1_2 and some cosmetic changes (XRPLF#4419) Only account specified as destination can settle through brokerage: (XRPLF#4399) Prevent brokered sale of NFToken to owner: (XRPLF#4403) Fix 3 issues around NFToken offer acceptance (XRPLF#4380) Allow NFT to be burned when number of offers is greater than 500 (XRPLF#4346) Add fixUnburnableNFToken feature (XRPLF#4391)
ximinez
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Feb 15, 2023
…ctionality * upstream/develop: Rename to fixNonFungibleTokensV1_2 and some cosmetic changes (XRPLF#4419) Only account specified as destination can settle through brokerage: (XRPLF#4399) Prevent brokered sale of NFToken to owner: (XRPLF#4403) Fix 3 issues around NFToken offer acceptance (XRPLF#4380) Allow NFT to be burned when number of offers is greater than 500 (XRPLF#4346) Add fixUnburnableNFToken feature (XRPLF#4391) Change default vote on fixUniversalNumber from yes to no (XRPLF#4414)
ximinez
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…tpage * upstream/develop: Rename to fixNonFungibleTokensV1_2 and some cosmetic changes (XRPLF#4419) Only account specified as destination can settle through brokerage: (XRPLF#4399) Prevent brokered sale of NFToken to owner: (XRPLF#4403) Fix 3 issues around NFToken offer acceptance (XRPLF#4380) Allow NFT to be burned when number of offers is greater than 500 (XRPLF#4346) Add fixUnburnableNFToken feature (XRPLF#4391) Change default vote on fixUniversalNumber from yes to no (XRPLF#4414)
dangell7
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Mar 5, 2023
Fixes XRPLF#4374 It was possible for a broker to combine a sell and a buy offer from an account that already owns an NFT. Such brokering extracts money from the NFT owner and provides no benefit in return. With this amendment, the code detects when a broker is returning an NFToken to its initial owner and prohibits the transaction. This forbids a broker from selling an NFToken to the account that already owns the token. This fixes a bug in the original implementation of XLS-20. Thanks to @nixer89 for suggesting this fix.
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(If approved, this PR will be merged after #4380 and #4346. These three PRs share an amendment and we want them to go out in the same release.)As of 2023-02-09, these have been merged into the feature branch.High Level Overview of Change
Fixes #4374.
Without the amendment in this PR, it is possible for a broker to combine a sell and a buy offer from an account that already owns an NFT. Such brokering extracts money from the NFT owner and provides no benefit in return. This pull request detects when a broker is returning an NFToken to its initial owner and prohibits the transaction.
Context of Change
This fixes a bug in the original implementation of XLS-20. The fix is to forbid a broker from selling an NFToken to the account that already owns the token. The fix was initially suggested by @nixer89.
Type of Change