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send_ely_to_ibc.go
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/
send_ely_to_ibc.go
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package evmhandler
import (
"math/big"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/ethereum/go-ethereum/accounts/abi"
"github.com/ethereum/go-ethereum/common"
elysiumkeeper "github.com/furyaxyz/elysium/v2/x/elysium/keeper"
"github.com/furyaxyz/elysium/v2/x/elysium/types"
)
var _ types.EvmLogHandler = SendElyToIbcHandler{}
const SendElyToIbcEventName = "__ElysiumSendElyToIbc"
// SendElyToIbcEvent represent the signature of
// `event __ElysiumSendElyToIbc(string recipient, uint256 amount)`
var SendElyToIbcEvent abi.Event
func init() {
addressType, _ := abi.NewType("address", "", nil)
uint256Type, _ := abi.NewType("uint256", "", nil)
stringType, _ := abi.NewType("string", "", nil)
SendElyToIbcEvent = abi.NewEvent(
SendElyToIbcEventName,
SendElyToIbcEventName,
false,
abi.Arguments{abi.Argument{
Name: "sender",
Type: addressType,
Indexed: false,
}, abi.Argument{
Name: "recipient",
Type: stringType,
Indexed: false,
}, abi.Argument{
Name: "amount",
Type: uint256Type,
Indexed: false,
}},
)
}
// SendElyToIbcHandler handles `__ElysiumSendElyToIbc` log
type SendElyToIbcHandler struct {
bankKeeper types.BankKeeper
elysiumKeeper elysiumkeeper.Keeper
}
func NewSendElyToIbcHandler(bankKeeper types.BankKeeper, elysiumKeeper elysiumkeeper.Keeper) *SendElyToIbcHandler {
return &SendElyToIbcHandler{
bankKeeper: bankKeeper,
elysiumKeeper: elysiumKeeper,
}
}
func (h SendElyToIbcHandler) EventID() common.Hash {
return SendElyToIbcEvent.ID
}
func (h SendElyToIbcHandler) Handle(
ctx sdk.Context,
contract common.Address,
topics []common.Hash,
data []byte,
_ func(contractAddress common.Address, logSig common.Hash, logData []byte),
) error {
unpacked, err := SendElyToIbcEvent.Inputs.Unpack(data)
if err != nil {
// log and ignore
h.elysiumKeeper.Logger(ctx).Error("log signature matches but failed to decode", "error", err)
return nil
}
contractAddr := sdk.AccAddress(contract.Bytes())
sender := sdk.AccAddress(unpacked[0].(common.Address).Bytes())
recipient := unpacked[1].(string)
amount := sdk.NewIntFromBigInt(unpacked[2].(*big.Int))
evmDenom := h.elysiumKeeper.GetEvmParams(ctx).EvmDenom
coins := sdk.NewCoins(sdk.NewCoin(evmDenom, amount))
// First, transfer IBC coin to user so that he will be the refunded address if transfer fails
if err = h.bankKeeper.SendCoins(ctx, contractAddr, sender, coins); err != nil {
return err
}
// Initiate IBC transfer from sender account
if err = h.elysiumKeeper.IbcTransferCoins(ctx, sender.String(), recipient, coins, ""); err != nil {
return err
}
return nil
}