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Update eth_call code.

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This commit is contained in:
Arijit Das 2021-09-29 10:57:11 +05:30
parent 0f2b6fd843
commit cc6822f7a6
5 changed files with 207 additions and 131 deletions
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214
pkg/eth/api.go
View File

@ -27,10 +27,12 @@ import (
"strconv"
"time"
"github.com/ethereum/go-ethereum/accounts/abi"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/eth/filters"
@ -819,50 +821,59 @@ func (pea *PublicEthAPI) localGetProof(ctx context.Context, address common.Addre
}, state.Error()
}
// Call executes the given transaction on the state for the given block number.
//
// Additionally, the caller can specify a batch of contract for fields overriding.
//
// Note, this function doesn't make and changes in the state/blockchain and is
// useful to execute and retrieve values.
func (pea *PublicEthAPI) Call(ctx context.Context, args CallArgs, blockNrOrHash rpc.BlockNumberOrHash, overrides *map[common.Address]account) (hexutil.Bytes, error) {
var accounts map[common.Address]account
if overrides != nil {
accounts = *overrides
}
res, _, failed, err := DoCall(ctx, pea.B, args, blockNrOrHash, accounts, 5*time.Second, pea.B.Config.RPCGasCap)
if (failed || err != nil) && pea.rpc != nil {
var hex hexutil.Bytes
if err := pea.rpc.CallContext(ctx, &hex, "eth_call", args, blockNrOrHash, overrides); hex != nil && err == nil {
go pea.writeStateDiffAtOrFor(blockNrOrHash)
return hex, nil
}
}
if failed && err == nil {
return nil, errors.New("eth_call failed without error")
}
return (hexutil.Bytes)(res), err
// revertError is an API error that encompassas an EVM revertal with JSON error
// code and a binary data blob.
type revertError struct {
error
reason string // revert reason hex encoded
}
func DoCall(ctx context.Context, b *Backend, args CallArgs, blockNrOrHash rpc.BlockNumberOrHash, overrides map[common.Address]account, timeout time.Duration, globalGasCap *big.Int) ([]byte, uint64, bool, error) {
defer func(start time.Time) {
logrus.Debugf("Executing EVM call finished %s runtime %s", time.Now().String(), time.Since(start).String())
}(time.Now())
state, header, err := b.StateAndHeaderByNumberOrHash(ctx, blockNrOrHash)
if state == nil || err != nil {
return nil, 0, false, err
// ErrorCode returns the JSON error code for a revertal.
// See: https://github.com/ethereum/wiki/wiki/JSON-RPC-Error-Codes-Improvement-Proposal
func (e *revertError) ErrorCode() int {
return 3
}
// ErrorData returns the hex encoded revert reason.
func (e *revertError) ErrorData() interface{} {
return e.reason
}
func newRevertError(result *core.ExecutionResult) *revertError {
reason, errUnpack := abi.UnpackRevert(result.Revert())
err := errors.New("execution reverted")
if errUnpack == nil {
err = fmt.Errorf("execution reverted: %v", reason)
}
// Set sender address or use a default if none specified
var addr common.Address
if args.From == nil {
if b.Config.DefaultSender != nil {
addr = *b.Config.DefaultSender
return &revertError{
error: err,
reason: hexutil.Encode(result.Revert()),
}
} else {
addr = *args.From
}
// OverrideAccount indicates the overriding fields of account during the execution
// of a message call.
// Note, state and stateDiff can't be specified at the same time. If state is
// set, message execution will only use the data in the given state. Otherwise
// if statDiff is set, all diff will be applied first and then execute the call
// message.
type OverrideAccount struct {
Nonce *hexutil.Uint64 `json:"nonce"`
Code *hexutil.Bytes `json:"code"`
Balance **hexutil.Big `json:"balance"`
State *map[common.Hash]common.Hash `json:"state"`
StateDiff *map[common.Hash]common.Hash `json:"stateDiff"`
}
// StateOverride is the collection of overridden accounts.
type StateOverride map[common.Address]OverrideAccount
// Apply overrides the fields of specified accounts into the given state.
func (diff *StateOverride) Apply(state *state.StateDB) error {
if diff == nil {
return nil
}
// Override the fields of specified contracts before execution.
for addr, account := range overrides {
for addr, account := range *diff {
// Override account nonce.
if account.Nonce != nil {
state.SetNonce(addr, uint64(*account.Nonce))
@ -876,7 +887,7 @@ func DoCall(ctx context.Context, b *Backend, args CallArgs, blockNrOrHash rpc.Bl
state.SetBalance(addr, (*big.Int)(*account.Balance))
}
if account.State != nil && account.StateDiff != nil {
return nil, 0, false, fmt.Errorf("account %s has both 'state' and 'stateDiff'", addr.Hex())
return fmt.Errorf("account %s has both 'state' and 'stateDiff'", addr.Hex())
}
// Replace entire state if caller requires.
if account.State != nil {
@ -889,73 +900,47 @@ func DoCall(ctx context.Context, b *Backend, args CallArgs, blockNrOrHash rpc.Bl
}
}
}
// Set default gas & gas price if none were set
gas := uint64(math.MaxUint64 / 2)
if args.Gas != nil {
gas = uint64(*args.Gas)
return nil
}
// Call executes the given transaction on the state for the given block number.
//
// Additionally, the caller can specify a batch of contract for fields overriding.
//
// Note, this function doesn't make and changes in the state/blockchain and is
// useful to execute and retrieve values.
func (pea *PublicEthAPI) Call(ctx context.Context, args CallArgs, blockNrOrHash rpc.BlockNumberOrHash, overrides *StateOverride) (hexutil.Bytes, error) {
result, err := DoCall(ctx, pea.B, args, blockNrOrHash, overrides, 5*time.Second, pea.B.Config.RPCGasCap.Uint64())
// If the result contains a revert reason, try to unpack and return it.
if err == nil && len(result.Revert()) > 0 {
// Doubt: Should we return this? This might indicate failure in VM.
err = newRevertError(result)
}
if globalGasCap != nil && globalGasCap.Uint64() < gas {
logrus.Warnf("Caller gas above allowance, capping; requested: %d, cap: %d", gas, globalGasCap)
gas = globalGasCap.Uint64()
if err != nil && pea.rpc != nil {
var hex hexutil.Bytes
if err := pea.rpc.CallContext(ctx, &hex, "eth_call", args, blockNrOrHash, overrides); hex != nil && err == nil {
go pea.writeStateDiffAtOrFor(blockNrOrHash)
return hex, nil
}
}
return result.Return(), result.Err
}
func DoCall(ctx context.Context, b *Backend, args CallArgs, blockNrOrHash rpc.BlockNumberOrHash, overrides *StateOverride, timeout time.Duration, globalGasCap uint64) (*core.ExecutionResult, error) {
defer func(start time.Time) {
logrus.Debugf("Executing EVM call finished %s runtime %s", time.Now().String(), time.Since(start).String())
}(time.Now())
state, header, err := b.StateAndHeaderByNumberOrHash(ctx, blockNrOrHash)
if state == nil || err != nil {
return nil, err
}
var (
gasPrice *big.Int
gasFeeCap *big.Int
gasTipCap *big.Int
)
if header.BaseFee == nil {
// If there's no basefee, then it must be a non-1559 execution
gasPrice = new(big.Int)
if args.GasPrice != nil {
gasPrice = args.GasPrice.ToInt()
if err := overrides.Apply(state); err != nil {
return nil, err
}
gasFeeCap, gasTipCap = gasPrice, gasPrice
} else {
// A basefee is provided, necessitating 1559-type execution
if args.GasPrice != nil {
// User specified the legacy gas field, convert to 1559 gas typing
gasPrice = args.GasPrice.ToInt()
gasFeeCap, gasTipCap = gasPrice, gasPrice
} else {
// User specified 1559 gas feilds (or none), use those
gasFeeCap = new(big.Int)
if args.MaxFeePerGas != nil {
gasFeeCap = args.MaxFeePerGas.ToInt()
}
gasTipCap = new(big.Int)
if args.MaxPriorityFeePerGas != nil {
gasTipCap = args.MaxPriorityFeePerGas.ToInt()
}
// Backfill the legacy gasPrice for EVM execution, unless we're all zeroes
gasPrice = new(big.Int)
if gasFeeCap.BitLen() > 0 || gasTipCap.BitLen() > 0 {
gasPrice = math.BigMin(new(big.Int).Add(gasTipCap, header.BaseFee), gasFeeCap)
}
}
}
value := new(big.Int)
if args.Value != nil {
value = args.Value.ToInt()
}
var data []byte
if args.Input != nil {
data = *args.Input
} else if args.Data != nil {
data = *args.Data
}
var accessList types.AccessList
if args.AccessList != nil {
accessList = *args.AccessList
}
// Create new call message
msg := types.NewMessage(addr, args.To, 0, value, gas, gasPrice, gasFeeCap, gasTipCap, data, accessList, false)
// Setup context so it may be cancelled the call has completed
// or, in case of unmetered gas, setup a context with a timeout.
@ -970,10 +955,16 @@ func DoCall(ctx context.Context, b *Backend, args CallArgs, blockNrOrHash rpc.Bl
defer cancel()
// Get a new instance of the EVM.
evm, err := b.GetEVM(ctx, msg, state, header)
msg, err := args.ToMessage(globalGasCap, header.BaseFee)
if err != nil {
return nil, 0, false, err
return nil, err
}
evm, vmError, err := b.GetEVM(ctx, msg, state, header)
if err != nil {
return nil, err
}
// Wait for the context to be done and cancel the evm. Even if the
// EVM has finished, cancelling may be done (repeatedly)
go func() {
@ -981,18 +972,21 @@ func DoCall(ctx context.Context, b *Backend, args CallArgs, blockNrOrHash rpc.Bl
evm.Cancel()
}()
// Setup the gas pool (also for unmetered requests)
// and apply the message.
// Execute the message.
gp := new(core.GasPool).AddGas(math.MaxUint64)
result, err := core.ApplyMessage(evm, msg, gp)
if err != nil {
return nil, 0, false, fmt.Errorf("execution failed: %v", err)
if err := vmError(); err != nil {
return nil, err
}
// If the timer caused an abort, return an appropriate error message
if evm.Cancelled() {
return nil, 0, false, fmt.Errorf("execution aborted (timeout = %v)", timeout)
return nil, fmt.Errorf("execution aborted (timeout = %v)", timeout)
}
return result.Return(), result.UsedGas, result.Failed(), err
if err != nil {
return result, fmt.Errorf("err: %w (supplied gas %d)", err, msg.Gas())
}
return result, nil
}
// writeStateDiffAtOrFor calls out to the proxy statediffing geth client to fill in a gap in the index

9
pkg/eth/backend.go
View File

@ -26,7 +26,6 @@ import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/consensus"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/core"
@ -620,11 +619,11 @@ func (b *Backend) GetCanonicalHeader(number uint64) (string, []byte, error) {
}
// GetEVM constructs and returns a vm.EVM
func (b *Backend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header) (*vm.EVM, error) {
state.SetBalance(msg.From(), math.MaxBig256)
vmctx := core.NewEVMBlockContext(header, b, nil)
func (b *Backend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header) (*vm.EVM, func() error, error) {
vmError := func() error { return nil }
txContext := core.NewEVMTxContext(msg)
return vm.NewEVM(vmctx, txContext, state, b.Config.ChainConfig, b.Config.VMConfig), nil
context := core.NewEVMBlockContext(header, b, nil)
return vm.NewEVM(context, txContext, state, b.Config.ChainConfig, b.Config.VMConfig), vmError, nil
}
// GetAccountByNumberOrHash returns the account object for the provided address at the block corresponding to the provided number or hash

103
pkg/eth/types.go
View File

@ -17,14 +17,17 @@
package eth
import (
"errors"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/statediff/indexer/ipfs"
"github.com/ethereum/go-ethereum/statediff/indexer/models"
sdtypes "github.com/ethereum/go-ethereum/statediff/types"
"github.com/sirupsen/logrus"
)
// RPCTransaction represents a transaction that will serialize to the RPC representation of a transaction
@ -99,18 +102,94 @@ type CallArgs struct {
Input *hexutil.Bytes `json:"input"`
}
// account indicates the overriding fields of account during the execution of
// a message call.
// Note, state and stateDiff can't be specified at the same time. If state is
// set, message execution will only use the data in the given state. Otherwise
// if statDiff is set, all diff will be applied first and then execute the call
// message.
type account struct {
Nonce *hexutil.Uint64 `json:"nonce"`
Code *hexutil.Bytes `json:"code"`
Balance **hexutil.Big `json:"balance"`
State *map[common.Hash]common.Hash `json:"state"`
StateDiff *map[common.Hash]common.Hash `json:"stateDiff"`
// from retrieves the transaction sender address.
func (arg *CallArgs) from() common.Address {
if arg.From == nil {
return common.Address{}
}
return *arg.From
}
// data retrieves the transaction calldata. Input field is preferred.
func (arg *CallArgs) data() []byte {
if arg.Input != nil {
return *arg.Input
}
if arg.Data != nil {
return *arg.Data
}
return nil
}
// ToMessage converts the transaction arguments to the Message type used by the
// core evm. This method is used in calls and traces that do not require a real
// live transaction.
func (arg *CallArgs) ToMessage(globalGasCap uint64, baseFee *big.Int) (types.Message, error) {
// Reject invalid combinations of pre- and post-1559 fee styles
if arg.GasPrice != nil && (arg.MaxFeePerGas != nil || arg.MaxPriorityFeePerGas != nil) {
return types.Message{}, errors.New("both gasPrice and (maxFeePerGas or maxPriorityFeePerGas) specified")
}
// Set sender address or use zero address if none specified.
addr := arg.from()
// Set default gas & gas price if none were set
gas := globalGasCap
if gas == 0 {
gas = uint64(math.MaxUint64 / 2)
}
if arg.Gas != nil {
gas = uint64(*arg.Gas)
}
if globalGasCap != 0 && globalGasCap < gas {
logrus.Warn("Caller gas above allowance, capping", "requested", gas, "cap", globalGasCap)
gas = globalGasCap
}
var (
gasPrice *big.Int
gasFeeCap *big.Int
gasTipCap *big.Int
)
if baseFee == nil {
// If there's no basefee, then it must be a non-1559 execution
gasPrice = new(big.Int)
if arg.GasPrice != nil {
gasPrice = arg.GasPrice.ToInt()
}
gasFeeCap, gasTipCap = gasPrice, gasPrice
} else {
// A basefee is provided, necessitating 1559-type execution
if arg.GasPrice != nil {
// User specified the legacy gas field, convert to 1559 gas typing
gasPrice = arg.GasPrice.ToInt()
gasFeeCap, gasTipCap = gasPrice, gasPrice
} else {
// User specified 1559 gas feilds (or none), use those
gasFeeCap = new(big.Int)
if arg.MaxFeePerGas != nil {
gasFeeCap = arg.MaxFeePerGas.ToInt()
}
gasTipCap = new(big.Int)
if arg.MaxPriorityFeePerGas != nil {
gasTipCap = arg.MaxPriorityFeePerGas.ToInt()
}
// Backfill the legacy gasPrice for EVM execution, unless we're all zeroes
gasPrice = new(big.Int)
if gasFeeCap.BitLen() > 0 || gasTipCap.BitLen() > 0 {
gasPrice = math.BigMin(new(big.Int).Add(gasTipCap, baseFee), gasFeeCap)
}
}
}
value := new(big.Int)
if arg.Value != nil {
value = arg.Value.ToInt()
}
data := arg.data()
var accessList types.AccessList
if arg.AccessList != nil {
accessList = *arg.AccessList
}
msg := types.NewMessage(addr, arg.To, 0, value, gas, gasPrice, gasFeeCap, gasTipCap, data, accessList, true)
return msg, nil
}
// IPLDs is used to package raw IPLD block data fetched from IPFS and returned by the server

14
pkg/graphql/graphql.go
View File

@ -835,16 +835,20 @@ func (b *Block) Call(ctx context.Context, args struct {
return nil, err
}
}
result, gas, failed, err := eth.DoCall(ctx, b.backend, args.Data, *b.numberOrHash, nil, 5*time.Second, b.backend.RPCGasCap())
result, err := eth.DoCall(ctx, b.backend, args.Data, *b.numberOrHash, nil, 5*time.Second, b.backend.RPCGasCap().Uint64())
if err != nil {
return nil, err
}
status := hexutil.Uint64(1)
if failed {
if result.Failed() {
status = 0
}
return &CallResult{
data: hexutil.Bytes(result),
gasUsed: hexutil.Uint64(gas),
data: result.ReturnData,
gasUsed: hexutil.Uint64(result.UsedGas),
status: status,
}, err
}, nil
}
// Resolver is the top-level object in the GraphQL hierarchy.

2
pkg/serve/service.go
View File

@ -100,7 +100,7 @@ func NewServer(settings *Config) (Server, error) {
var err error
sap.backend, err = eth.NewEthBackend(sap.db, &eth.Config{
ChainConfig: settings.ChainConfig,
VMConfig: vm.Config{},
VMConfig: vm.Config{NoBaseFee: true},
DefaultSender: settings.DefaultSender,
RPCGasCap: settings.RPCGasCap,
GroupCacheConfig: settings.GroupCache,