feat: add IBC ante handler (#717)

## Description
This PR adds the IBC `AnteHandler` to the list of ante handlers. Closes #714

Depends-On: #716

---

### Author Checklist

*All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.*

I have...

- [x] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/desmos-labs/desmos/blob/master/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building modules](https://docs.cosmos.network/v0.44/building-modules/intro.html)
- [ ] included the necessary unit and integration [tests](https://github.com/desmos-labs/desmos/blob/master/CONTRIBUTING.md#testing)
- [x] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [x] reviewed "Files changed" and left comments if necessary
- [ ] confirmed all CI checks have passed

### Reviewers Checklist

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I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

.changeset/entries/034df6ee16191e8ca2f4ccb5f622fe7253090f6ff773a1797febb2c27b69e70f.yaml

@@ -0,0 +1,6 @@
+type: feat
+module: none
+pull_request: 717
+description: Added IBC AnteHandler
+backward_compatible: true
+date: 2022-01-10T10:48:44.785928578Z

app/ante.go

@@ -0,0 +1,54 @@
+package app
+
+import (
+ sdk "github.com/cosmos/cosmos-sdk/types"
+ sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
+ "github.com/cosmos/cosmos-sdk/x/auth/ante"
+ channelkeeper "github.com/cosmos/ibc-go/v2/modules/core/04-channel/keeper"
+ ibcante "github.com/cosmos/ibc-go/v2/modules/core/ante"
+)
+
+// HandlerOptions extend the SDK's AnteHandler options by requiring the IBC
+// channel keeper.
+type HandlerOptions struct {
+ ante.HandlerOptions
+
+ IBCChannelkeeper channelkeeper.Keeper
+}
+
+func NewAnteHandler(options HandlerOptions) (sdk.AnteHandler, error) {
+ if options.AccountKeeper == nil {
+ return nil, sdkerrors.Wrap(sdkerrors.ErrLogic, "account keeper is required for AnteHandler")
+ }
+ if options.BankKeeper == nil {
+ return nil, sdkerrors.Wrap(sdkerrors.ErrLogic, "bank keeper is required for AnteHandler")
+ }
+ if options.SignModeHandler == nil {
+ return nil, sdkerrors.Wrap(sdkerrors.ErrLogic, "sign mode handler is required for ante builder")
+ }
+
+ var sigGasConsumer = options.SigGasConsumer
+ if sigGasConsumer == nil {
+ sigGasConsumer = ante.DefaultSigVerificationGasConsumer
+ }
+
+ anteDecorators := []sdk.AnteDecorator{
+ ante.NewSetUpContextDecorator(),
+ ante.NewRejectExtensionOptionsDecorator(),
+ ante.NewMempoolFeeDecorator(),
+ ante.NewValidateBasicDecorator(),
+ ante.NewTxTimeoutHeightDecorator(),
+ ante.NewValidateMemoDecorator(options.AccountKeeper),
+ ante.NewConsumeGasForTxSizeDecorator(options.AccountKeeper),
+ ante.NewDeductFeeDecorator(options.AccountKeeper, options.BankKeeper, options.FeegrantKeeper),
+ // SetPubKeyDecorator must be called before all signature verification decorators
+ ante.NewSetPubKeyDecorator(options.AccountKeeper),
+ ante.NewValidateSigCountDecorator(options.AccountKeeper),
+ ante.NewSigGasConsumeDecorator(options.AccountKeeper, sigGasConsumer),
+ ante.NewSigVerificationDecorator(options.AccountKeeper, options.SignModeHandler),
+ ante.NewIncrementSequenceDecorator(options.AccountKeeper),
+ ibcante.NewAnteDecorator(options.IBCChannelkeeper),
+ }
+
+ return sdk.ChainAnteDecorators(anteDecorators...), nil
+}

app/app.go

@@ -484,13 +484,16 @@ func NewDesmosApp(
  // Initialize BaseApp
  app.SetInitChainer(app.InitChainer)
  app.SetBeginBlocker(app.BeginBlocker)
- anteHandler, err := ante.NewAnteHandler(
- ante.HandlerOptions{
- AccountKeeper: app.AccountKeeper,
- BankKeeper: app.BankKeeper,
- SignModeHandler: encodingConfig.TxConfig.SignModeHandler(),
- FeegrantKeeper: app.FeeGrantKeeper,
- SigGasConsumer: ante.DefaultSigVerificationGasConsumer,
+ anteHandler, err := NewAnteHandler(
+ HandlerOptions{
+ HandlerOptions: ante.HandlerOptions{
+ AccountKeeper: app.AccountKeeper,
+ BankKeeper: app.BankKeeper,
+ SignModeHandler: encodingConfig.TxConfig.SignModeHandler(),
+ FeegrantKeeper: app.FeeGrantKeeper,
+ SigGasConsumer: ante.DefaultSigVerificationGasConsumer,
+ },
+ IBCChannelkeeper: app.IBCKeeper.ChannelKeeper,
  },
  )
  if err != nil {