laconicd/x/evm/handler.go
Austin Abell 33ab63ef15
update web3 transaction hash from RLP (#250)
* remove ethereum hash of web3 transaction type (always amino hash)

* Update changelog
2020-04-13 19:08:43 -04:00

173 lines
4.7 KiB
Go

package evm
import (
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/common"
sdk "github.com/cosmos/cosmos-sdk/types"
emint "github.com/cosmos/ethermint/types"
"github.com/cosmos/ethermint/x/evm/types"
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 {
switch msg := msg.(type) {
case types.MsgEthereumTx:
return HandleMsgEthereumTx(ctx, k, msg)
case types.MsgEthermint:
return HandleMsgEthermint(ctx, k, msg)
default:
errMsg := fmt.Sprintf("unrecognized ethermint msg type: %v", msg.Type())
return sdk.ErrUnknownRequest(errMsg).Result()
}
}
}
// HandleMsgEthereumTx handles an Ethereum specific tx
func HandleMsgEthereumTx(ctx sdk.Context, k Keeper, msg types.MsgEthereumTx) sdk.Result {
ctx = ctx.WithEventManager(sdk.NewEventManager())
// parse the chainID from a string to a base-10 integer
intChainID, ok := new(big.Int).SetString(ctx.ChainID(), 10)
if !ok {
return emint.ErrInvalidChainID(fmt.Sprintf("invalid chainID: %s", ctx.ChainID())).Result()
}
// Verify signature and retrieve sender address
sender, err := msg.VerifySig(intChainID)
if err != nil {
return sdk.ResultFromError(err)
}
txHash := tmtypes.Tx(ctx.TxBytes()).Hash()
ethHash := common.BytesToHash(txHash)
st := types.StateTransition{
Sender: sender,
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,
THash: &ethHash,
Simulate: ctx.IsCheckTx(),
}
// Prepare db for logs
// TODO: block hash
k.CommitStateDB.Prepare(ethHash, common.Hash{}, k.TxCount)
k.TxCount++
// TODO: move to keeper
returnData, err := st.TransitionCSDB(ctx)
if err != nil {
return sdk.ResultFromError(err)
}
// update block bloom filter
k.Bloom.Or(k.Bloom, returnData.Bloom)
// update transaction logs in KVStore
err = k.SetTransactionLogs(ctx, returnData.Logs, txHash[:])
if err != nil {
return sdk.ResultFromError(err)
}
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
returnData.Result.Events = ctx.EventManager().Events()
return *returnData.Result
}
// HandleMsgEthermint handles a MsgEthermint
func HandleMsgEthermint(ctx sdk.Context, k Keeper, msg types.MsgEthermint) sdk.Result {
ctx = ctx.WithEventManager(sdk.NewEventManager())
// parse the chainID from a string to a base-10 integer
intChainID, ok := new(big.Int).SetString(ctx.ChainID(), 10)
if !ok {
return emint.ErrInvalidChainID(fmt.Sprintf("invalid chainID: %s", ctx.ChainID())).Result()
}
txHash := tmtypes.Tx(ctx.TxBytes()).Hash()
ethHash := common.BytesToHash(txHash)
st := types.StateTransition{
Sender: common.BytesToAddress(msg.From.Bytes()),
AccountNonce: msg.AccountNonce,
Price: msg.Price.BigInt(),
GasLimit: msg.GasLimit,
Amount: msg.Amount.BigInt(),
Payload: msg.Payload,
Csdb: k.CommitStateDB.WithContext(ctx),
ChainID: intChainID,
THash: &ethHash,
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++
returnData, err := st.TransitionCSDB(ctx)
if err != nil {
return sdk.ResultFromError(err)
}
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
returnData.Result.Events = ctx.EventManager().Events()
return *returnData.Result
}