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check fee module locked and enable fee before refunding all fees #1341

Merged
merged 11 commits into from
May 16, 2022
Merged

check fee module locked and enable fee before refunding all fees #1341

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d749d8a
check fee module locked and enable fee before refunding all fees
vuong177 May 5, 2022
1826600
add test in TestOnChanCloseConfirm
vuong177 May 8, 2022
9705a7f
Merge branch 'main' into feecheck-OnChanCloseConfirm
vuong177 May 9, 2022
acbdf88
Update modules/apps/29-fee/ibc_middleware_test.go
vuong177 May 9, 2022
312f309
update CHANGELOG.MD && nits
vuong177 May 9, 2022
ad24d6d
Update CHANGELOG.md
vuong177 May 10, 2022
233332c
Merge branch 'main' into feecheck-OnChanCloseConfirm
catShaark May 10, 2022
e8431df
update OnChanCloseConfirm
vuong177 May 12, 2022
3e61225
minor test in TestOnChanCloseConfirm
vuong177 May 15, 2022
7e55504
OnChanCloseInit
vuong177 May 15, 2022
5e78870
Merge branch 'main' into feecheck-OnChanCloseConfirm
vuong177 May 16, 2022
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8 changes: 8 additions & 0 deletions modules/apps/29-fee/ibc_middleware.go
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Original file line number Diff line number Diff line change
Expand Up @@ -168,6 +168,14 @@ func (im IBCMiddleware) OnChanCloseConfirm(
return err
}

if im.keeper.IsLocked(ctx) {
return types.ErrFeeModuleLocked
}
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if !im.keeper.IsFeeEnabled(ctx, portID, channelID) {
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return types.ErrFeeNotEnabled
}
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@colin-axner colin-axner May 11, 2022 •
edited
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It is good for us to think about why we even have "fee enabled channels". This is because non fee enabled channels still use the same middleware stack as fee enabled channels. Thus this check prevents closing of a non fee enabled channel. A key requirement of the middleware design is that middleware not enabled for a specific channel must not affect the behaviour of that channel (this requirement is broken by returning an error).

We should:

  • return nil if the fee is not enabled (exit early)
  • move this check above IsLocked

The reasoning for the second point is that we don't want non fee enabled channels to get affected by the fee module getting locked. A locked fee module should not affect non fee enabled channels

btw, thanks for the contribution! :)

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@vuong177 vuong177 May 12, 2022 •
edited
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Thanks you. It helped me understand. I'll make the changes.


if err := im.keeper.RefundFeesOnChannelClosure(ctx, portID, channelID); err != nil {
return err
}
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