mirror of
https://github.com/0glabs/0g-chain.git
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fd83da7a05
* better error message for mismatched events * rename evm asset conversion event types * emit message event for MsgConvertCosmosCoinToERC20 * emit convert_cosmos_coin_to_erc20 event
57 lines
1.8 KiB
Go
57 lines
1.8 KiB
Go
package keeper
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import (
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errorsmod "cosmossdk.io/errors"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/kava-labs/kava/x/evmutil/types"
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)
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// ConvertCosmosCoinToERC20 locks the initiator's sdk.Coin in the module account
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// and mints the receiver a corresponding amount of an ERC20 representing the Coin.
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// If a conversion has never been made before and no contract exists, one will be deployed.
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// Only denoms registered to the AllowedCosmosDenoms param may be converted.
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func (k *Keeper) ConvertCosmosCoinToERC20(
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ctx sdk.Context,
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initiator sdk.AccAddress,
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receiver types.InternalEVMAddress,
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amount sdk.Coin,
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) error {
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// check that the conversion is allowed
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tokenInfo, allowed := k.GetAllowedTokenMetadata(ctx, amount.Denom)
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if !allowed {
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return errorsmod.Wrapf(types.ErrSDKConversionNotEnabled, amount.Denom)
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}
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// send coins from initiator to the module account
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// do this before possible contract deploy to prevent unnecessary store interactions
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err := k.bankKeeper.SendCoinsFromAccountToModule(
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ctx, initiator, types.ModuleName, sdk.NewCoins(amount),
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)
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if err != nil {
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return err
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}
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// find deployed contract if it exits
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contractAddress, err := k.GetOrDeployCosmosCoinERC20Contract(ctx, tokenInfo)
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if err != nil {
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return err
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}
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// mint erc20 tokens for the user
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err = k.MintERC20(ctx, contractAddress, receiver, amount.Amount.BigInt())
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if err != nil {
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return err
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}
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ctx.EventManager().EmitEvent(sdk.NewEvent(
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types.EventTypeConvertCosmosCoinToERC20,
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sdk.NewAttribute(types.AttributeKeyInitiator, initiator.String()),
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sdk.NewAttribute(types.AttributeKeyReceiver, receiver.String()),
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sdk.NewAttribute(types.AttributeKeyERC20Address, contractAddress.Hex()),
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sdk.NewAttribute(types.AttributeKeyAmount, amount.String()),
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))
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return nil
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}
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