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keeper.go
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keeper.go
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package keeper
import (
"github.com/armon/go-metrics"
"github.com/tendermint/tendermint/libs/log"
"github.com/cosmos/cosmos-sdk/codec"
storetypes "github.com/cosmos/cosmos-sdk/store/types"
"github.com/cosmos/cosmos-sdk/telemetry"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
transfertypes "github.com/cosmos/ibc-go/v3/modules/apps/transfer/types"
clienttypes "github.com/cosmos/ibc-go/v3/modules/core/02-client/types"
host "github.com/cosmos/ibc-go/v3/modules/core/24-host"
coretypes "github.com/cosmos/ibc-go/v3/modules/core/types"
"github.com/strangelove-ventures/packet-forward-middleware/v2/router/parser"
"github.com/strangelove-ventures/packet-forward-middleware/v2/router/types"
)
// Keeper defines the IBC fungible transfer keeper
type Keeper struct {
storeKey storetypes.StoreKey
cdc codec.BinaryCodec
paramSpace paramtypes.Subspace
transferKeeper types.TransferKeeper
distrKeeper types.DistributionKeeper
}
var (
// Timeout height following IBC defaults
DefaultTransferPacketTimeoutHeight = clienttypes.MustParseHeight(transfertypes.DefaultRelativePacketTimeoutHeight)
// Timeout timestamp following IBC defaults
DefaultTransferPacketTimeoutTimestamp = transfertypes.DefaultRelativePacketTimeoutTimestamp
)
// NewKeeper creates a new 29-fee Keeper instance
func NewKeeper(
cdc codec.BinaryCodec, key storetypes.StoreKey, paramSpace paramtypes.Subspace,
transferKeeper types.TransferKeeper, distrKeeper types.DistributionKeeper,
) Keeper {
// set KeyTable if it has not already been set
if !paramSpace.HasKeyTable() {
paramSpace = paramSpace.WithKeyTable(types.ParamKeyTable())
}
return Keeper{
cdc: cdc,
storeKey: key,
transferKeeper: transferKeeper,
paramSpace: paramSpace,
distrKeeper: distrKeeper,
}
}
// Logger returns a module-specific logger.
func (k Keeper) Logger(ctx sdk.Context) log.Logger {
return ctx.Logger().With("module", "x/"+host.ModuleName+"-"+types.ModuleName)
}
func (k Keeper) ForwardTransferPacket(ctx sdk.Context, parsedReceiver *parser.ParsedReceiver, token sdk.Coin, labels []metrics.Label) error {
var err error
feeAmount := sdk.NewDecFromInt(token.Amount).Mul(k.GetFeePercentage(ctx)).RoundInt()
packetAmount := token.Amount.Sub(feeAmount)
feeCoins := sdk.Coins{sdk.NewCoin(token.Denom, feeAmount)}
packetCoin := sdk.NewCoin(token.Denom, packetAmount)
// pay fees
if feeAmount.IsPositive() {
err = k.distrKeeper.FundCommunityPool(ctx, feeCoins, parsedReceiver.HostAccAddr)
if err != nil {
return sdkerrors.Wrapf(sdkerrors.ErrInsufficientFunds, err.Error())
}
}
// send tokens to destination
err = k.transferKeeper.SendTransfer(
ctx,
parsedReceiver.Port,
parsedReceiver.Channel,
packetCoin,
parsedReceiver.HostAccAddr,
parsedReceiver.Destination,
DefaultTransferPacketTimeoutHeight,
DefaultTransferPacketTimeoutTimestamp,
)
if err != nil {
return sdkerrors.Wrapf(sdkerrors.ErrInsufficientFunds, err.Error())
}
defer func() {
telemetry.SetGaugeWithLabels(
[]string{"tx", "msg", "ibc", "transfer"},
float32(token.Amount.Int64()),
[]metrics.Label{telemetry.NewLabel(coretypes.LabelDenom, token.Denom)},
)
telemetry.IncrCounterWithLabels(
[]string{"ibc", types.ModuleName, "send"},
1,
labels,
)
}()
return nil
}