laconicd-deprecated/x/evm/handler.go
Federico Kunze c8b8f49675
run make format (#351)
* run make format

* fix yaml

* fixes
2020-07-02 11:19:48 -04:00

187 lines
5.1 KiB
Go

package evm
import (
"math/big"
"github.com/ethereum/go-ethereum/common"
emint "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) {
// parse the chainID from a string to a base-10 integer
intChainID, ok := new(big.Int).SetString(ctx.ChainID(), 10)
if !ok {
return nil, sdkerrors.Wrap(emint.ErrInvalidChainID, ctx.ChainID())
}
// Verify signature and retrieve sender address
sender, err := msg.VerifySig(intChainID)
if err != nil {
return nil, err
}
txHash := tmtypes.Tx(ctx.TxBytes()).Hash()
ethHash := common.BytesToHash(txHash)
st := types.StateTransition{
AccountNonce: msg.Data.AccountNonce,
Price: msg.Data.Price,
GasLimit: msg.Data.GasLimit,
Recipient: msg.Data.Recipient,
Amount: msg.Data.Amount,
Payload: msg.Data.Payload,
Csdb: k.CommitStateDB.WithContext(ctx),
ChainID: intChainID,
TxHash: &ethHash,
Sender: sender,
Simulate: ctx.IsCheckTx(),
}
// Prepare db for logs
// TODO: block hash
k.CommitStateDB.Prepare(ethHash, common.Hash{}, k.TxCount)
k.TxCount++
// TODO: move to keeper
executionResult, err := st.TransitionDb(ctx)
if err != nil {
return nil, err
}
// update block bloom filter
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.EventTypeEthereumTx,
sdk.NewAttribute(sdk.AttributeKeyAmount, msg.Data.Amount.String()),
),
sdk.NewEvent(
sdk.EventTypeMessage,
sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
sdk.NewAttribute(sdk.AttributeKeySender, sender.String()),
),
})
if msg.Data.Recipient != nil {
ctx.EventManager().EmitEvent(
sdk.NewEvent(
types.EventTypeEthereumTx,
sdk.NewAttribute(types.AttributeKeyRecipient, msg.Data.Recipient.String()),
),
)
}
// set the events to the result
executionResult.Result.Events = ctx.EventManager().Events().ToABCIEvents()
return executionResult.Result, 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
intChainID, ok := new(big.Int).SetString(ctx.ChainID(), 10)
if !ok {
return nil, sdkerrors.Wrap(emint.ErrInvalidChainID, ctx.ChainID())
}
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: intChainID,
TxHash: &ethHash,
Sender: common.BytesToAddress(msg.From.Bytes()),
Simulate: ctx.IsCheckTx(),
}
if msg.Recipient != nil {
to := common.BytesToAddress(msg.Recipient.Bytes())
st.Recipient = &to
}
// Prepare db for logs
k.CommitStateDB.Prepare(ethHash, common.Hash{}, k.TxCount)
k.TxCount++
executionResult, err := st.TransitionDb(ctx)
if err != nil {
return nil, err
}
// update block bloom filter
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().ToABCIEvents()
return executionResult.Result, nil
}