laconicd/x/evm/handler.go

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package evm
import (
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"fmt"
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"runtime/debug"
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log "github.com/xlab/suplog"
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sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
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ethcmn "github.com/ethereum/go-ethereum/common"
"github.com/cosmos/ethermint/x/evm/keeper"
"github.com/cosmos/ethermint/x/evm/types"
)
// NewHandler returns a handler for Ethermint type messages.
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func NewHandler(k *keeper.Keeper) sdk.Handler {
return func(ctx sdk.Context, msg sdk.Msg) (result *sdk.Result, err error) {
defer Recover(&err)
ctx = ctx.WithEventManager(sdk.NewEventManager())
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switch msg := msg.(type) {
case *types.MsgEthereumTx:
// execute state transition
res, err := k.EthereumTx(sdk.WrapSDKContext(ctx), msg)
if err != nil {
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return sdk.WrapServiceResult(ctx, res, err)
} else if result, err = sdk.WrapServiceResult(ctx, res, nil); err != nil {
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return nil, err
}
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// log state transition result
var recipientLog string
if res.ContractAddress != "" {
recipientLog = fmt.Sprintf("contract address %s", res.ContractAddress)
} else {
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var recipient string
if to := msg.To(); to != nil {
recipient = to.Hex()
}
recipientLog = fmt.Sprintf("recipient address %s", recipient)
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}
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sender := ethcmn.BytesToAddress(msg.GetFrom().Bytes())
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if res.Reverted {
result.Log = "transaction reverted"
log := fmt.Sprintf(
"reverted EVM state transition; sender address %s; %s", sender.Hex(), recipientLog,
)
k.Logger(ctx).Info(log)
} else {
log := fmt.Sprintf(
"executed EVM state transition; sender address %s; %s", sender.Hex(), recipientLog,
)
result.Log = log
k.Logger(ctx).Info(log)
}
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return result, nil
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default:
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err := sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unrecognized %s message type: %T", types.ModuleName, msg)
return nil, err
}
}
}
func Recover(err *error) {
if r := recover(); r != nil {
*err = sdkerrors.Wrapf(sdkerrors.ErrPanic, "%v", r)
if e, ok := r.(error); ok {
log.WithError(e).Errorln("evm msg handler panicked with an error")
log.Debugln(string(debug.Stack()))
} else {
log.Errorln(r)
}
}
}