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ibc.go
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ibc.go
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package ibc
import (
"encoding/json"
"strings"
sdkmath "cosmossdk.io/math"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
transfertypes "github.com/cosmos/ibc-go/v6/modules/apps/transfer/types"
)
// GetFundsFromPacket returns transfer amount and denom
func GetFundsFromPacket(data []byte) (sdkmath.Int, string, error) {
var packetData transfertypes.FungibleTokenPacketData
err := json.Unmarshal(data, &packetData)
if err != nil {
return sdkmath.Int{}, "", err
}
amount, ok := sdkmath.NewIntFromString(packetData.Amount)
if !ok {
return sdkmath.Int{}, "", sdkerrors.ErrInvalidRequest.Wrapf("invalid transfer amount %s", packetData.Amount)
}
return amount, GetLocalDenom(packetData.Denom), nil
}
// GetLocalDenom retruns ibc denom
// Expected denoms in the following cases:
//
// send non-native: transfer/channel-0/denom -> ibc/xxx
// send native: denom -> denom
// recv (B)non-native: denom
// recv (B)native: transfer/channel-0/denom
func GetLocalDenom(denom string) string {
if strings.HasPrefix(denom, "transfer/") {
denomTrace := transfertypes.ParseDenomTrace(denom)
return denomTrace.IBCDenom()
}
return denom
}