URITokenTransferFee Amendment [DO NOT MERGE]#721
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Sync: Ripple(d) 2.4.0
* Add AMM bid/create/deposit/swap/withdraw/vote invariants:
- Deposit, Withdrawal invariants: `sqrt(asset1Balance * asset2Balance) >= LPTokens`.
- Bid: `sqrt(asset1Balance * asset2Balance) > LPTokens` and the pool balances don't change.
- Create: `sqrt(asset1Balance * assetBalance2) == LPTokens`.
- Swap: `asset1BalanceAfter * asset2BalanceAfter >= asset1BalanceBefore * asset2BalanceBefore`
and `LPTokens` don't change.
- Vote: `LPTokens` and pool balances don't change.
- All AMM and swap transactions: amounts and tokens are greater than zero, except on withdrawal if all tokens
are withdrawn.
* Add AMM deposit and withdraw rounding to ensure AMM invariant:
- On deposit, tokens out are rounded downward and deposit amount is rounded upward.
- On withdrawal, tokens in are rounded upward and withdrawal amount is rounded downward.
* Add Order Book Offer invariant to verify consumed amounts. Consumed amounts are less than the offer.
* Fix Bid validation. `AuthAccount` can't have duplicate accounts or the submitter account.
Due to rounding, the LPTokenBalance of the last LP might not match the LP's trustline balance. This was fixed for `AMMWithdraw` in `fixAMMv1_1` by adjusting the LPTokenBalance to be the same as the trustline balance. Since `AMMClawback` is also performing a withdrawal, we need to adjust LPTokenBalance as well in `AMMClawback.` This change includes: 1. Refactored `verifyAndAdjustLPTokenBalance` function in `AMMUtils`, which both`AMMWithdraw` and `AMMClawback` call to adjust LPTokenBalance. 2. Added the unit test `testLastHolderLPTokenBalance` to test the scenario. 3. Modify the existing unit tests for `fixAMMClawbackRounding`.
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Backport of XRPLF/rippled#6325. The python version runs ~80x faster.
…gparse" This reverts commit 5c1d7d9.
Codecov Report❌ Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## dev #721 +/- ##
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Coverage 77.3% 77.3%
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Files 837 837
Lines 78585 78675 +90
Branches 11559 11556 -3
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+ Hits 60743 60841 +98
+ Misses 17832 17824 -8
Partials 10 10
... and 9 files with indirect coverage changes 🚀 New features to boost your workflow:
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#720
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