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feat(x/bank): Placing SendRestriction before Deduction of Coins in SendCoins #20517

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merged 4 commits into from
Jun 3, 2024
Merged

feat(x/bank): Placing SendRestriction before Deduction of Coins in SendCoins #20517

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d71e680
Apply SendRestriction before subUnlockedCoins in SendCoins
wr1159 Jun 2, 2024
830d9d1
Update x/bank README.md regarding SendCoins SendRestriction order
wr1159 Jun 2, 2024
aeba93e
Fix TestSendCoinsWithRestriction by not expecting call to GetAccount
wr1159 Jun 2, 2024
dbd2022
Add changelog regarding reordering of applying SendRestriction in Sen…
wr1159 Jun 2, 2024
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2 changes: 1 addition & 1 deletion x/bank/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -275,7 +275,7 @@ Both functions compose the provided restriction with any previously provided res
`PrependSendRestriction` adds the restriction to be run before any previously provided send restrictions.
The composition will short-circuit when an error is encountered. I.e. if the first one returns an error, the second is not run.

During `SendCoins`, the send restriction is applied after coins are removed from the from address, but before adding them to the to address.
During `SendCoins`, the send restriction is applied before coins are removed from the from address and adding them to the to address.
During `InputOutputCoins`, the send restriction is applied after the input coins are removed and once for each output before the funds are added.

A send restriction function should make use of a custom value in the context to allow bypassing that specific restriction.
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7 changes: 2 additions & 5 deletions x/bank/keeper/keeper_test.go
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Expand Up @@ -1180,7 +1180,7 @@ func (suite *KeeperTestSuite) TestSendCoinsWithRestrictions() {
},
expErr: "test restriction error",
expBals: expBals{
from: sdk.NewCoins(newFooCoin(885), newBarCoin(273)),
from: sdk.NewCoins(newFooCoin(985), newBarCoin(473)),
to1: sdk.NewCoins(newFooCoin(15)),
to2: sdk.NewCoins(newBarCoin(27)),
},
Expand All @@ -1194,12 +1194,9 @@ func (suite *KeeperTestSuite) TestSendCoinsWithRestrictions() {
actualRestrictionArgs = nil
suite.bankKeeper.SetSendRestriction(tc.fn)
ctx := suite.ctx
if len(tc.expErr) > 0 {
suite.authKeeper.EXPECT().GetAccount(ctx, fromAddr).Return(fromAcc)
} else {
if len(tc.expErr) == 0 {
suite.mockSendCoins(ctx, fromAcc, tc.finalAddr)
}

var err error
testFunc := func() {
err = suite.bankKeeper.SendCoins(ctx, fromAddr, tc.toAddr, tc.amt)
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4 changes: 2 additions & 2 deletions x/bank/keeper/send.go
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Original file line number Diff line number Diff line change
Expand Up @@ -189,12 +189,12 @@ func (k BaseSendKeeper) SendCoins(ctx context.Context, fromAddr, toAddr sdk.AccA
}

var err error
err = k.subUnlockedCoins(ctx, fromAddr, amt)
toAddr, err = k.sendRestriction.apply(ctx, fromAddr, toAddr, amt)
if err != nil {
return err
}

toAddr, err = k.sendRestriction.apply(ctx, fromAddr, toAddr, amt)
err = k.subUnlockedCoins(ctx, fromAddr, amt)
if err != nil {
return err
}
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