0g-chain/x/evmutil/keeper/conversion_cosmos_native.go
Robert Pirtle fd83da7a05
feat(evmutil)!: emit events on MsgConvertCosmosCoinToERC20 (#1604)
* better error message for mismatched events

* rename evm asset conversion event types

* emit message event for MsgConvertCosmosCoinToERC20

* emit convert_cosmos_coin_to_erc20 event
2023-05-30 13:06:46 -07:00

57 lines
1.8 KiB
Go

package keeper
import (
errorsmod "cosmossdk.io/errors"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/kava-labs/kava/x/evmutil/types"
)
// ConvertCosmosCoinToERC20 locks the initiator's sdk.Coin in the module account
// and mints the receiver a corresponding amount of an ERC20 representing the Coin.
// If a conversion has never been made before and no contract exists, one will be deployed.
// Only denoms registered to the AllowedCosmosDenoms param may be converted.
func (k *Keeper) ConvertCosmosCoinToERC20(
ctx sdk.Context,
initiator sdk.AccAddress,
receiver types.InternalEVMAddress,
amount sdk.Coin,
) error {
// check that the conversion is allowed
tokenInfo, allowed := k.GetAllowedTokenMetadata(ctx, amount.Denom)
if !allowed {
return errorsmod.Wrapf(types.ErrSDKConversionNotEnabled, amount.Denom)
}
// send coins from initiator to the module account
// do this before possible contract deploy to prevent unnecessary store interactions
err := k.bankKeeper.SendCoinsFromAccountToModule(
ctx, initiator, types.ModuleName, sdk.NewCoins(amount),
)
if err != nil {
return err
}
// find deployed contract if it exits
contractAddress, err := k.GetOrDeployCosmosCoinERC20Contract(ctx, tokenInfo)
if err != nil {
return err
}
// mint erc20 tokens for the user
err = k.MintERC20(ctx, contractAddress, receiver, amount.Amount.BigInt())
if err != nil {
return err
}
ctx.EventManager().EmitEvent(sdk.NewEvent(
types.EventTypeConvertCosmosCoinToERC20,
sdk.NewAttribute(types.AttributeKeyInitiator, initiator.String()),
sdk.NewAttribute(types.AttributeKeyReceiver, receiver.String()),
sdk.NewAttribute(types.AttributeKeyERC20Address, contractAddress.Hex()),
sdk.NewAttribute(types.AttributeKeyAmount, amount.String()),
))
return nil
}