laconicd/x/evm/handler.go
KamiD ffbb207655
fix panic when start a node with snapshot (#673)
* fix panic when start a node with snapshot

* change the return value of evm.NewKeeper to a pointer, roll back the before change

* add changelog

* fix importer test
2021-01-07 08:55:01 -03:00

129 lines
3.4 KiB
Go

package evm
import (
"github.com/ethereum/go-ethereum/common"
ethermint "github.com/cosmos/ethermint/types"
"github.com/cosmos/ethermint/x/evm/types"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
tmtypes "github.com/tendermint/tendermint/types"
)
// NewHandler returns a handler for Ethermint type messages.
func NewHandler(k *Keeper) sdk.Handler {
return func(ctx sdk.Context, msg sdk.Msg) (*sdk.Result, error) {
ctx = ctx.WithEventManager(sdk.NewEventManager())
switch msg := msg.(type) {
case types.MsgEthereumTx:
return handleMsgEthereumTx(ctx, k, msg)
case types.MsgEthermint:
return handleMsgEthermint(ctx, k, msg)
default:
return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unrecognized %s message type: %T", ModuleName, msg)
}
}
}
// handleMsgEthereumTx handles an Ethereum specific tx
func handleMsgEthereumTx(ctx sdk.Context, k *Keeper, msg types.MsgEthereumTx) (*sdk.Result, error) {
// execute state transition
res, err := k.EthereumTx(ctx, msg)
if err != nil {
return nil, err
}
// log state transition result
k.Logger(ctx).Info(res.Log)
return res, nil
}
// handleMsgEthermint handles an sdk.StdTx for an Ethereum state transition
func handleMsgEthermint(ctx sdk.Context, k *Keeper, msg types.MsgEthermint) (*sdk.Result, error) {
// parse the chainID from a string to a base-10 integer
chainIDEpoch, err := ethermint.ParseChainID(ctx.ChainID())
if err != nil {
return nil, err
}
txHash := tmtypes.Tx(ctx.TxBytes()).Hash()
ethHash := common.BytesToHash(txHash)
st := types.StateTransition{
AccountNonce: msg.AccountNonce,
Price: msg.Price.BigInt(),
GasLimit: msg.GasLimit,
Amount: msg.Amount.BigInt(),
Payload: msg.Payload,
Csdb: k.CommitStateDB.WithContext(ctx),
ChainID: chainIDEpoch,
TxHash: &ethHash,
Sender: common.BytesToAddress(msg.From.Bytes()),
Simulate: ctx.IsCheckTx(),
}
if msg.Recipient != nil {
to := common.BytesToAddress(msg.Recipient.Bytes())
st.Recipient = &to
}
if !st.Simulate {
// Prepare db for logs
blockHash := types.HashFromContext(ctx)
k.CommitStateDB.Prepare(ethHash, blockHash, k.TxCount)
k.TxCount++
}
config, found := k.GetChainConfig(ctx)
if !found {
return nil, types.ErrChainConfigNotFound
}
executionResult, err := st.TransitionDb(ctx, config)
if err != nil {
return nil, err
}
// update block bloom filter
if !st.Simulate {
k.Bloom.Or(k.Bloom, executionResult.Bloom)
// update transaction logs in KVStore
err = k.SetLogs(ctx, common.BytesToHash(txHash), executionResult.Logs)
if err != nil {
panic(err)
}
}
// log successful execution
k.Logger(ctx).Info(executionResult.Result.Log)
ctx.EventManager().EmitEvents(sdk.Events{
sdk.NewEvent(
types.EventTypeEthermint,
sdk.NewAttribute(sdk.AttributeKeyAmount, msg.Amount.String()),
),
sdk.NewEvent(
sdk.EventTypeMessage,
sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
sdk.NewAttribute(sdk.AttributeKeySender, msg.From.String()),
),
})
if msg.Recipient != nil {
ctx.EventManager().EmitEvent(
sdk.NewEvent(
types.EventTypeEthermint,
sdk.NewAttribute(types.AttributeKeyRecipient, msg.Recipient.String()),
),
)
}
// set the events to the result
executionResult.Result.Events = ctx.EventManager().Events()
return executionResult.Result, nil
}