laconicd-deprecated/x/evm/keeper/grpc_query.go
2021-09-15 10:50:52 -03:00

459 lines
13 KiB
Go

package keeper
import (
"context"
"encoding/json"
"errors"
"fmt"
"math/big"
"time"
"github.com/ethereum/go-ethereum/eth/tracers"
"github.com/palantir/stacktrace"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/core"
ethtypes "github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
ethparams "github.com/ethereum/go-ethereum/params"
ethermint "github.com/tharsis/ethermint/types"
"github.com/tharsis/ethermint/x/evm/types"
)
var _ types.QueryServer = Keeper{}
const (
defaultTraceTimeout = 5 * time.Second
)
// Account implements the Query/Account gRPC method
func (k Keeper) Account(c context.Context, req *types.QueryAccountRequest) (*types.QueryAccountResponse, error) {
if req == nil {
return nil, status.Error(codes.InvalidArgument, "empty request")
}
if err := ethermint.ValidateAddress(req.Address); err != nil {
return nil, status.Error(
codes.InvalidArgument, err.Error(),
)
}
addr := common.HexToAddress(req.Address)
ctx := sdk.UnwrapSDKContext(c)
k.WithContext(ctx)
return &types.QueryAccountResponse{
Balance: k.GetBalance(addr).String(),
CodeHash: k.GetCodeHash(addr).Hex(),
Nonce: k.GetNonce(addr),
}, nil
}
func (k Keeper) CosmosAccount(c context.Context, req *types.QueryCosmosAccountRequest) (*types.QueryCosmosAccountResponse, error) {
if req == nil {
return nil, status.Error(codes.InvalidArgument, "empty request")
}
if err := ethermint.ValidateAddress(req.Address); err != nil {
return nil, status.Error(
codes.InvalidArgument, err.Error(),
)
}
ctx := sdk.UnwrapSDKContext(c)
k.WithContext(ctx)
ethAddr := common.HexToAddress(req.Address)
cosmosAddr := sdk.AccAddress(ethAddr.Bytes())
account := k.accountKeeper.GetAccount(ctx, cosmosAddr)
res := types.QueryCosmosAccountResponse{
CosmosAddress: cosmosAddr.String(),
}
if account != nil {
res.Sequence = account.GetSequence()
res.AccountNumber = account.GetAccountNumber()
}
return &res, nil
}
func (k Keeper) ValidatorAccount(c context.Context, req *types.QueryValidatorAccountRequest) (*types.QueryValidatorAccountResponse, error) {
if req == nil {
return nil, status.Error(codes.InvalidArgument, "empty request")
}
consAddr, err := sdk.ConsAddressFromBech32(req.ConsAddress)
if err != nil {
return nil, status.Error(
codes.InvalidArgument, err.Error(),
)
}
ctx := sdk.UnwrapSDKContext(c)
k.WithContext(ctx)
validator, found := k.stakingKeeper.GetValidatorByConsAddr(ctx, consAddr)
if !found {
return nil, nil
}
accAddr := sdk.AccAddress(validator.GetOperator())
res := types.QueryValidatorAccountResponse{
AccountAddress: accAddr.String(),
}
account := k.accountKeeper.GetAccount(ctx, accAddr)
if account != nil {
res.Sequence = account.GetSequence()
res.AccountNumber = account.GetAccountNumber()
}
return &res, nil
}
// Balance implements the Query/Balance gRPC method
func (k Keeper) Balance(c context.Context, req *types.QueryBalanceRequest) (*types.QueryBalanceResponse, error) {
if req == nil {
return nil, status.Error(codes.InvalidArgument, "empty request")
}
if err := ethermint.ValidateAddress(req.Address); err != nil {
return nil, status.Error(
codes.InvalidArgument,
types.ErrZeroAddress.Error(),
)
}
ctx := sdk.UnwrapSDKContext(c)
k.WithContext(ctx)
balanceInt := k.GetBalance(common.HexToAddress(req.Address))
return &types.QueryBalanceResponse{
Balance: balanceInt.String(),
}, nil
}
// Storage implements the Query/Storage gRPC method
func (k Keeper) Storage(c context.Context, req *types.QueryStorageRequest) (*types.QueryStorageResponse, error) {
if req == nil {
return nil, status.Error(codes.InvalidArgument, "empty request")
}
if err := ethermint.ValidateAddress(req.Address); err != nil {
return nil, status.Error(
codes.InvalidArgument,
types.ErrZeroAddress.Error(),
)
}
ctx := sdk.UnwrapSDKContext(c)
k.WithContext(ctx)
address := common.HexToAddress(req.Address)
key := common.HexToHash(req.Key)
state := k.GetState(address, key)
stateHex := state.Hex()
return &types.QueryStorageResponse{
Value: stateHex,
}, nil
}
// Code implements the Query/Code gRPC method
func (k Keeper) Code(c context.Context, req *types.QueryCodeRequest) (*types.QueryCodeResponse, error) {
if req == nil {
return nil, status.Error(codes.InvalidArgument, "empty request")
}
if err := ethermint.ValidateAddress(req.Address); err != nil {
return nil, status.Error(
codes.InvalidArgument,
types.ErrZeroAddress.Error(),
)
}
ctx := sdk.UnwrapSDKContext(c)
k.WithContext(ctx)
address := common.HexToAddress(req.Address)
code := k.GetCode(address)
return &types.QueryCodeResponse{
Code: code,
}, nil
}
// Params implements the Query/Params gRPC method
func (k Keeper) Params(c context.Context, _ *types.QueryParamsRequest) (*types.QueryParamsResponse, error) {
ctx := sdk.UnwrapSDKContext(c)
params := k.GetParams(ctx)
return &types.QueryParamsResponse{
Params: params,
}, nil
}
// EthCall implements eth_call rpc api.
func (k Keeper) EthCall(c context.Context, req *types.EthCallRequest) (*types.MsgEthereumTxResponse, error) {
ctx := sdk.UnwrapSDKContext(c)
k.WithContext(ctx)
var args types.CallArgs
err := json.Unmarshal(req.Args, &args)
if err != nil {
return nil, status.Error(codes.InvalidArgument, err.Error())
}
msg := args.ToMessage(req.GasCap)
params := k.GetParams(ctx)
ethCfg := params.ChainConfig.EthereumConfig(k.eip155ChainID)
coinbase, err := k.GetCoinbaseAddress(ctx)
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
tracer := types.NewTracer(k.tracer, msg, ethCfg, k.Ctx().BlockHeight(), k.debug)
evm := k.NewEVM(msg, ethCfg, params, coinbase, tracer)
// pass true means execute in query mode, which don't do actual gas refund.
res, err := k.ApplyMessage(evm, msg, ethCfg, true)
k.ctxStack.RevertAll()
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
return res, nil
}
// EstimateGas implements eth_estimateGas rpc api.
func (k Keeper) EstimateGas(c context.Context, req *types.EthCallRequest) (*types.EstimateGasResponse, error) {
ctx := sdk.UnwrapSDKContext(c)
k.WithContext(ctx)
if req.GasCap < ethparams.TxGas {
return nil, status.Error(codes.InvalidArgument, "gas cap cannot be lower than 21,000")
}
var args types.CallArgs
err := json.Unmarshal(req.Args, &args)
if err != nil {
return nil, status.Error(codes.InvalidArgument, err.Error())
}
// Binary search the gas requirement, as it may be higher than the amount used
var (
lo = ethparams.TxGas - 1
hi uint64
cap uint64
)
// Determine the highest gas limit can be used during the estimation.
if args.Gas != nil && uint64(*args.Gas) >= ethparams.TxGas {
hi = uint64(*args.Gas)
} else {
// Query block gas limit
params := ctx.ConsensusParams()
if params != nil && params.Block != nil && params.Block.MaxGas > 0 {
hi = uint64(params.Block.MaxGas)
} else {
hi = req.GasCap
}
}
// TODO Recap the highest gas limit with account's available balance.
// Recap the highest gas allowance with specified gascap.
if req.GasCap != 0 && hi > req.GasCap {
hi = req.GasCap
}
cap = hi
params := k.GetParams(ctx)
ethCfg := params.ChainConfig.EthereumConfig(k.eip155ChainID)
coinbase, err := k.GetCoinbaseAddress(ctx)
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
// Create a helper to check if a gas allowance results in an executable transaction
executable := func(gas uint64) (bool, *types.MsgEthereumTxResponse, error) {
args.Gas = (*hexutil.Uint64)(&gas)
// Reset to the initial context
k.WithContext(ctx)
msg := args.ToMessage(req.GasCap)
tracer := types.NewTracer(k.tracer, msg, ethCfg, k.Ctx().BlockHeight(), k.debug)
evm := k.NewEVM(msg, ethCfg, params, coinbase, tracer)
// pass true means execute in query mode, which don't do actual gas refund.
rsp, err := k.ApplyMessage(evm, msg, ethCfg, true)
k.ctxStack.RevertAll()
if err != nil {
if errors.Is(stacktrace.RootCause(err), core.ErrIntrinsicGas) {
return true, nil, nil // Special case, raise gas limit
}
return true, nil, err // Bail out
}
return len(rsp.VmError) > 0, rsp, nil
}
// Execute the binary search and hone in on an executable gas limit
hi, err = types.BinSearch(lo, hi, executable)
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
// Reject the transaction as invalid if it still fails at the highest allowance
if hi == cap {
failed, result, err := executable(hi)
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
if failed {
if result != nil && result.VmError != vm.ErrOutOfGas.Error() {
if result.VmError == vm.ErrExecutionReverted.Error() {
return nil, types.NewExecErrorWithReason(result.Ret)
}
return nil, status.Error(codes.Internal, result.VmError)
}
// Otherwise, the specified gas cap is too low
return nil, status.Error(codes.Internal, fmt.Sprintf("gas required exceeds allowance (%d)", cap))
}
}
return &types.EstimateGasResponse{Gas: hi}, nil
}
// TraceTx configures a new tracer according to the provided configuration, and
// executes the given message in the provided environment. The return value will
// be tracer dependent.
func (k Keeper) TraceTx(c context.Context, req *types.QueryTraceTxRequest) (*types.QueryTraceTxResponse, error) {
ctx := sdk.UnwrapSDKContext(c)
k.WithContext(ctx)
params := k.GetParams(ctx)
coinbase, err := k.GetCoinbaseAddress(ctx)
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
ethCfg := params.ChainConfig.EthereumConfig(k.eip155ChainID)
signer := ethtypes.MakeSigner(ethCfg, big.NewInt(ctx.BlockHeight()))
result, err := k.traceTx(c, coinbase, signer, req.TxIndex, params, ctx, ethCfg, req.Msg, req.TraceConfig)
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
resultData, err := json.Marshal(result)
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
return &types.QueryTraceTxResponse{
Data: resultData,
}, nil
}
func (k *Keeper) traceTx(c context.Context, coinbase common.Address, signer ethtypes.Signer, txIndex uint64,
params types.Params, ctx sdk.Context, ethCfg *ethparams.ChainConfig, msg *types.MsgEthereumTx, traceConfig *types.TraceConfig) (*interface{}, error) {
// Assemble the structured logger or the JavaScript tracer
var (
tracer vm.Tracer
err error
)
coreMessage, err := msg.AsMessage(signer)
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
switch {
case traceConfig != nil && traceConfig.Tracer != "":
timeout := defaultTraceTimeout
// TODO change timeout to time.duration
// Used string to comply with go ethereum
if traceConfig.Timeout != "" {
if timeout, err = time.ParseDuration(traceConfig.Timeout); err != nil {
return nil, status.Errorf(codes.InvalidArgument, "timeout value: %s", err.Error())
}
}
txContext := core.NewEVMTxContext(coreMessage)
// Construct the JavaScript tracer to execute with
if tracer, err = tracers.New(traceConfig.Tracer, txContext); err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
// Handle timeouts and RPC cancellations
deadlineCtx, cancel := context.WithTimeout(c, timeout)
go func() {
<-deadlineCtx.Done()
if deadlineCtx.Err() == context.DeadlineExceeded {
tracer.(*tracers.Tracer).Stop(errors.New("execution timeout"))
}
}()
defer cancel()
case traceConfig != nil:
logConfig := vm.LogConfig{
DisableMemory: traceConfig.DisableMemory,
Debug: traceConfig.Debug,
DisableStorage: traceConfig.DisableStorage,
DisableStack: traceConfig.DisableStack,
}
tracer = vm.NewStructLogger(&logConfig)
default:
tracer = types.NewTracer(types.TracerStruct, coreMessage, ethCfg, ctx.BlockHeight(), true)
}
evm := k.NewEVM(coreMessage, ethCfg, params, coinbase, tracer)
k.SetTxHashTransient(common.HexToHash(msg.Hash))
k.SetTxIndexTransient(txIndex)
res, err := k.ApplyMessage(evm, coreMessage, ethCfg, true)
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
var result interface{}
// Depending on the tracer type, format and return the trace result data.
switch tracer := tracer.(type) {
case *vm.StructLogger:
// TODO Return proper returnValue
result = types.ExecutionResult{
Gas: res.GasUsed,
Failed: res.Failed(),
ReturnValue: "",
StructLogs: types.FormatLogs(tracer.StructLogs()),
}
case *tracers.Tracer:
result, err = tracer.GetResult()
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
default:
return nil, status.Error(codes.InvalidArgument, "invalid tracer type")
}
return &result, nil
}