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target.go
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target.go
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package types
import (
"encoding/hex"
"errors"
"fmt"
"strings"
errorsmod "cosmossdk.io/errors"
ibctransfertypes "github.com/cosmos/ibc-go/v6/modules/apps/transfer/types"
channeltypes "github.com/cosmos/ibc-go/v6/modules/core/04-channel/types"
)
const (
LegacyERC20Target = "module/evm"
ERC20Target = "erc20"
GravityTarget = "gravity"
EthTarget = "eth"
LegacyChainPrefix = "chain/"
IBCPrefix = "ibc/"
)
type FxTarget struct {
isIBC bool
target string
Prefix string
SourcePort string
SourceChannel string
}
func ParseFxTarget(targetStr string) FxTarget {
// module evm
if targetStr == LegacyERC20Target {
return FxTarget{isIBC: false, target: ERC20Target}
}
targetStr = strings.TrimPrefix(targetStr, LegacyChainPrefix)
// cross-chain
if targetStr == GravityTarget {
return FxTarget{isIBC: false, target: EthTarget}
}
// ibc prefix
if strings.HasPrefix(targetStr, IBCPrefix) {
ibcData := strings.Split(targetStr, "/")
if len(ibcData) == 3 {
// ibc/{channelId}/{prefix} -> ibc/0/px
fxTarget := FxTarget{
isIBC: true,
Prefix: ibcData[2],
SourcePort: ibctransfertypes.ModuleName,
SourceChannel: fmt.Sprintf("%s%s", channeltypes.ChannelPrefix, ibcData[1]),
}
if !fxTarget.IBCValidate() {
return FxTarget{isIBC: false, target: targetStr}
}
return fxTarget
} else if len(ibcData) == 4 {
// ibc/{prefix}/transfer/channel-{id} -> ibc/px/transfer/channel-0
targetStr = strings.TrimPrefix(targetStr, IBCPrefix)
} else {
return FxTarget{isIBC: false, target: targetStr}
}
}
// px/transfer/channel-0
ibcData := strings.Split(targetStr, "/")
if len(ibcData) == 3 {
fxTarget := FxTarget{
isIBC: true,
Prefix: ibcData[0],
SourcePort: ibcData[1],
SourceChannel: ibcData[2],
}
if !fxTarget.IBCValidate() {
return FxTarget{isIBC: false, target: targetStr}
}
return fxTarget
}
return FxTarget{isIBC: false, target: targetStr}
}
func (i FxTarget) GetTarget() string {
if i.isIBC {
return fmt.Sprintf("%s/%s", i.SourceChannel, i.Prefix)
}
return i.target
}
func (i FxTarget) IsIBC() bool {
return i.isIBC
}
func (i FxTarget) IBCValidate() bool {
if !i.isIBC {
return false
}
if i.SourcePort != ibctransfertypes.ModuleName {
return false
}
if !channeltypes.IsValidChannelID(i.SourceChannel) {
return false
}
if len(strings.TrimSpace(i.Prefix)) == 0 {
return false
}
return true
}
func GetIbcDenomTrace(denom string, channelIBC string) (ibctransfertypes.DenomTrace, error) {
channelPath, err := hex.DecodeString(channelIBC)
if err != nil {
return ibctransfertypes.DenomTrace{}, errorsmod.Wrapf(err, "decode hex channel-ibc err")
}
// transfer/channel-0
path := string(channelPath)
if len(path) > 0 {
pathSplit := strings.Split(path, "/")
if len(pathSplit) != 2 {
return ibctransfertypes.DenomTrace{}, errors.New("invalid params channel-ibc")
}
if pathSplit[0] != "transfer" {
return ibctransfertypes.DenomTrace{}, errors.New("invalid source port")
}
if !channeltypes.IsValidChannelID(pathSplit[1]) {
return ibctransfertypes.DenomTrace{}, errors.New("invalid source channel")
}
}
return ibctransfertypes.DenomTrace{
Path: path,
BaseDenom: denom,
}, nil
}