a2f246c2a6
Uses the fastest slice making idiom of creating the well known
size of a slice using
make([]sdk.Attribute, len(response.Logs))
for i, log := range response.Logs {
txLogAttrs[i] = ...
}
instead of
make([]sdk.Attribute, 0)
for _, log := range response.Logs {
txLogAttrs = append(txLogAttrs, ...)
}
which had a few problems:
1. Using 0 for size then appending is quite slow yet we know the exact size
2. Using append instead of indexing is slower
If we examine the advisory at https://bencher.orijtech.com/perfclinic/sliceupdate/
and the verdict at https://bencher.orijtech.com/perfclinic/sliceupdate/#verdict
this new scheme shows a massive improvement in that call site.
Fixes #825
84 lines
2.4 KiB
Go
84 lines
2.4 KiB
Go
package keeper
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import (
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"context"
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"encoding/json"
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"fmt"
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tmbytes "github.com/tendermint/tendermint/libs/bytes"
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tmtypes "github.com/tendermint/tendermint/types"
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sdk "github.com/cosmos/cosmos-sdk/types"
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sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
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"github.com/tharsis/ethermint/x/evm/types"
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)
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var _ types.MsgServer = &Keeper{}
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// EthereumTx implements the gRPC MsgServer interface. It receives a transaction which is then
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// executed (i.e applied) against the go-ethereum EVM. The provided SDK Context is set to the Keeper
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// so that it can implements and call the StateDB methods without receiving it as a function
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// parameter.
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func (k *Keeper) EthereumTx(goCtx context.Context, msg *types.MsgEthereumTx) (*types.MsgEthereumTxResponse, error) {
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ctx := sdk.UnwrapSDKContext(goCtx)
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k.WithContext(ctx)
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sender := msg.From
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tx := msg.AsTransaction()
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response, err := k.ApplyTransaction(tx)
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if err != nil {
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return nil, sdkerrors.Wrap(err, "failed to apply transaction")
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}
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attrs := []sdk.Attribute{
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sdk.NewAttribute(sdk.AttributeKeyAmount, tx.Value().String()),
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// add event for ethereum transaction hash format
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sdk.NewAttribute(types.AttributeKeyEthereumTxHash, response.Hash),
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}
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if len(ctx.TxBytes()) > 0 {
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// add event for tendermint transaction hash format
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hash := tmbytes.HexBytes(tmtypes.Tx(ctx.TxBytes()).Hash())
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attrs = append(attrs, sdk.NewAttribute(types.AttributeKeyTxHash, hash.String()))
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}
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if to := tx.To(); to != nil {
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attrs = append(attrs, sdk.NewAttribute(types.AttributeKeyRecipient, to.Hex()))
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}
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if response.Failed() {
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attrs = append(attrs, sdk.NewAttribute(types.AttributeKeyEthereumTxFailed, response.VmError))
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}
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txLogAttrs := make([]sdk.Attribute, len(response.Logs))
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for i, log := range response.Logs {
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value, err := json.Marshal(log)
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if err != nil {
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return nil, sdkerrors.Wrap(err, "failed to encode log")
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}
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txLogAttrs[i] = sdk.NewAttribute(types.AttributeKeyTxLog, string(value))
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}
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// emit events
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ctx.EventManager().EmitEvents(sdk.Events{
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sdk.NewEvent(
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types.EventTypeEthereumTx,
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attrs...,
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),
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sdk.NewEvent(
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types.EventTypeTxLog,
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txLogAttrs...,
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),
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sdk.NewEvent(
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sdk.EventTypeMessage,
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sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
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sdk.NewAttribute(sdk.AttributeKeySender, sender),
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sdk.NewAttribute(types.AttributeKeyTxType, fmt.Sprintf("%d", tx.Type())),
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),
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})
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return response, nil
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}
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