laconicd/x/evm/keeper/msg_server.go

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package keeper
import (
"github.com/ethereum/go-ethereum/common"
tmtypes "github.com/tendermint/tendermint/types"
sdk "github.com/cosmos/cosmos-sdk/types"
ethermint "github.com/cosmos/ethermint/types"
"github.com/cosmos/ethermint/x/evm/types"
)
// EthereumTx implements the Msg/EthereumTx gRPC method.
func (k Keeper) EthereumTx(ctx sdk.Context, msg types.MsgEthereumTx) (*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
}
// Verify signature and retrieve sender address
sender, err := msg.VerifySig(chainIDEpoch)
if err != nil {
return nil, err
}
var recipient *common.Address
if msg.Data.Recipient != nil {
addr := common.HexToAddress(msg.Data.Recipient.Address)
recipient = &addr
}
txHash := tmtypes.Tx(ctx.TxBytes()).Hash()
ethHash := common.BytesToHash(txHash)
st := types.StateTransition{
AccountNonce: msg.Data.AccountNonce,
Price: msg.Data.Price.BigInt(),
GasLimit: msg.Data.GasLimit,
Recipient: recipient,
Amount: msg.Data.Amount.BigInt(),
Payload: msg.Data.Payload,
Csdb: k.CommitStateDB.WithContext(ctx),
ChainID: chainIDEpoch,
TxHash: &ethHash,
Sender: sender,
Simulate: ctx.IsCheckTx(),
}
// since the txCount is used by the stateDB, and a simulated tx is run only on the node it's submitted to,
// then this will cause the txCount/stateDB of the node that ran the simulated tx to be different than the
// other nodes, causing a consensus error
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
}
if !st.Simulate {
// 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)
}
}
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.Address),
),
)
}
executionResult.Result.Events = ctx.EventManager().Events()
return executionResult.Result, nil
}