// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package ethapi
import (
"bytes"
"encoding/hex"
"encoding/json"
"errors"
"fmt"
"math/big"
"strings"
"time"
"github.com/ethereum/ethash"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/compiler"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/rpc"
"github.com/syndtr/goleveldb/leveldb"
"golang.org/x/net/context"
)
const defaultGas = uint64(90000)
// PublicEthereumAPI provides an API to access Ethereum related information.
// It offers only methods that operate on public data that is freely available to anyone.
type PublicEthereumAPI struct {
b Backend
solcPath *string
solc **compiler.Solidity
}
// NewPublicEthereumAPI creates a new Etheruem protocol API.
func NewPublicEthereumAPI(b Backend, solcPath *string, solc **compiler.Solidity) *PublicEthereumAPI {
return &PublicEthereumAPI{b, solcPath, solc}
}
// GasPrice returns a suggestion for a gas price.
func (s *PublicEthereumAPI) GasPrice(ctx context.Context) (*big.Int, error) {
return s.b.SuggestPrice(ctx)
}
func (s *PublicEthereumAPI) getSolc() (*compiler.Solidity, error) {
var err error
solc := *s.solc
if solc == nil {
solc, err = compiler.New(*s.solcPath)
}
return solc, err
}
// GetCompilers returns the collection of available smart contract compilers
func (s *PublicEthereumAPI) GetCompilers() ([]string, error) {
solc, err := s.getSolc()
if err == nil && solc != nil {
return []string{"Solidity"}, nil
}
return []string{}, nil
}
// CompileSolidity compiles the given solidity source
func (s *PublicEthereumAPI) CompileSolidity(source string) (map[string]*compiler.Contract, error) {
solc, err := s.getSolc()
if err != nil {
return nil, err
}
if solc == nil {
return nil, errors.New("solc (solidity compiler) not found")
}
return solc.Compile(source)
}
// ProtocolVersion returns the current Ethereum protocol version this node supports
func (s *PublicEthereumAPI) ProtocolVersion() *rpc.HexNumber {
return rpc.NewHexNumber(s.b.ProtocolVersion())
}
// Syncing returns false in case the node is currently not syncing with the network. It can be up to date or has not
// yet received the latest block headers from its pears. In case it is synchronizing:
// - startingBlock: block number this node started to synchronise from
// - currentBlock: block number this node is currently importing
// - highestBlock: block number of the highest block header this node has received from peers
// - pulledStates: number of state entries processed until now
// - knownStates: number of known state entries that still need to be pulled
func (s *PublicEthereumAPI) Syncing() (interface{}, error) {
origin, current, height, pulled, known := s.b.Downloader().Progress()
// Return not syncing if the synchronisation already completed
if current >= height {
return false, nil
}
// Otherwise gather the block sync stats
return map[string]interface{}{
"startingBlock": rpc.NewHexNumber(origin),
"currentBlock": rpc.NewHexNumber(current),
"highestBlock": rpc.NewHexNumber(height),
"pulledStates": rpc.NewHexNumber(pulled),
"knownStates": rpc.NewHexNumber(known),
}, nil
}
// PublicTxPoolAPI offers and API for the transaction pool. It only operates on data that is non confidential.
type PublicTxPoolAPI struct {
b Backend
}
// NewPublicTxPoolAPI creates a new tx pool service that gives information about the transaction pool.
func NewPublicTxPoolAPI(b Backend) *PublicTxPoolAPI {
return &PublicTxPoolAPI{b}
}
// Content returns the transactions contained within the transaction pool.
func (s *PublicTxPoolAPI) Content() map[string]map[string]map[string][]*RPCTransaction {
content := map[string]map[string]map[string][]*RPCTransaction{
"pending": make(map[string]map[string][]*RPCTransaction),
"queued": make(map[string]map[string][]*RPCTransaction),
}
pending, queue := s.b.TxPoolContent()
// Flatten the pending transactions
for account, batches := range pending {
dump := make(map[string][]*RPCTransaction)
for nonce, txs := range batches {
nonce := fmt.Sprintf("%d", nonce)
for _, tx := range txs {
dump[nonce] = append(dump[nonce], newRPCPendingTransaction(tx))
}
}
content["pending"][account.Hex()] = dump
}
// Flatten the queued transactions
for account, batches := range queue {
dump := make(map[string][]*RPCTransaction)
for nonce, txs := range batches {
nonce := fmt.Sprintf("%d", nonce)
for _, tx := range txs {
dump[nonce] = append(dump[nonce], newRPCPendingTransaction(tx))
}
}
content["queued"][account.Hex()] = dump
}
return content
}
// Status returns the number of pending and queued transaction in the pool.
func (s *PublicTxPoolAPI) Status() map[string]*rpc.HexNumber {
pending, queue := s.b.Stats()
return map[string]*rpc.HexNumber{
"pending": rpc.NewHexNumber(pending),
"queued": rpc.NewHexNumber(queue),
}
}
// Inspect retrieves the content of the transaction pool and flattens it into an
// easily inspectable list.
func (s *PublicTxPoolAPI) Inspect() map[string]map[string]map[string][]string {
content := map[string]map[string]map[string][]string{
"pending": make(map[string]map[string][]string),
"queued": make(map[string]map[string][]string),
}
pending, queue := s.b.TxPoolContent()
// Define a formatter to flatten a transaction into a string
var format = func(tx *types.Transaction) string {
if to := tx.To(); to != nil {
return fmt.Sprintf("%s: %v wei + %v × %v gas", tx.To().Hex(), tx.Value(), tx.Gas(), tx.GasPrice())
}
return fmt.Sprintf("contract creation: %v wei + %v × %v gas", tx.Value(), tx.Gas(), tx.GasPrice())
}
// Flatten the pending transactions
for account, batches := range pending {
dump := make(map[string][]string)
for nonce, txs := range batches {
nonce := fmt.Sprintf("%d", nonce)
for _, tx := range txs {
dump[nonce] = append(dump[nonce], format(tx))
}
}
content["pending"][account.Hex()] = dump
}
// Flatten the queued transactions
for account, batches := range queue {
dump := make(map[string][]string)
for nonce, txs := range batches {
nonce := fmt.Sprintf("%d", nonce)
for _, tx := range txs {
dump[nonce] = append(dump[nonce], format(tx))
}
}
content["queued"][account.Hex()] = dump
}
return content
}
// PublicAccountAPI provides an API to access accounts managed by this node.
// It offers only methods that can retrieve accounts.
type PublicAccountAPI struct {
am *accounts.Manager
}
// NewPublicAccountAPI creates a new PublicAccountAPI.
func NewPublicAccountAPI(am *accounts.Manager) *PublicAccountAPI {
return &PublicAccountAPI{am: am}
}
// Accounts returns the collection of accounts this node manages
func (s *PublicAccountAPI) Accounts() []accounts.Account {
return s.am.Accounts()
}
// PrivateAccountAPI provides an API to access accounts managed by this node.
// It offers methods to create, (un)lock en list accounts. Some methods accept
// passwords and are therefore considered private by default.
type PrivateAccountAPI struct {
am *accounts.Manager
b Backend
}
// NewPrivateAccountAPI create a new PrivateAccountAPI.
func NewPrivateAccountAPI(b Backend) *PrivateAccountAPI {
return &PrivateAccountAPI{
am: b.AccountManager(),
b: b,
}
}
// ListAccounts will return a list of addresses for accounts this node manages.
func (s *PrivateAccountAPI) ListAccounts() []common.Address {
accounts := s.am.Accounts()
addresses := make([]common.Address, len(accounts))
for i, acc := range accounts {
addresses[i] = acc.Address
}
return addresses
}
// NewAccount will create a new account and returns the address for the new account.
func (s *PrivateAccountAPI) NewAccount(password string) (common.Address, error) {
acc, err := s.am.NewAccount(password)
if err == nil {
return acc.Address, nil
}
return common.Address{}, err
}
// ImportRawKey stores the given hex encoded ECDSA key into the key directory,
// encrypting it with the passphrase.
func (s *PrivateAccountAPI) ImportRawKey(privkey string, password string) (common.Address, error) {
hexkey, err := hex.DecodeString(privkey)
if err != nil {
return common.Address{}, err
}
acc, err := s.am.ImportECDSA(crypto.ToECDSA(hexkey), password)
return acc.Address, err
}
// UnlockAccount will unlock the account associated with the given address with
// the given password for duration seconds. If duration is nil it will use a
// default of 300 seconds. It returns an indication if the account was unlocked.
func (s *PrivateAccountAPI) UnlockAccount(addr common.Address, password string, duration *rpc.HexNumber) (bool, error) {
if duration == nil {
duration = rpc.NewHexNumber(300)
}
a := accounts.Account{Address: addr}
d := time.Duration(duration.Int64()) * time.Second
if err := s.am.TimedUnlock(a, password, d); err != nil {
return false, err
}
return true, nil
}
// LockAccount will lock the account associated with the given address when it's unlocked.
func (s *PrivateAccountAPI) LockAccount(addr common.Address) bool {
return s.am.Lock(addr) == nil
}
// SendTransaction will create a transaction from the given arguments and
// tries to sign it with the key associated with args.To. If the given passwd isn't
// able to decrypt the key it fails.
func (s *PrivateAccountAPI) SendTransaction(ctx context.Context, args SendTxArgs, passwd string) (common.Hash, error) {
var err error
args, err = prepareSendTxArgs(ctx, args, s.b)
if err != nil {
return common.Hash{}, err
}
if args.Nonce == nil {
nonce, err := s.b.GetPoolNonce(ctx, args.From)
if err != nil {
return common.Hash{}, err
}
args.Nonce = rpc.NewHexNumber(nonce)
}
var tx *types.Transaction
if args.To == nil {
tx = types.NewContractCreation(args.Nonce.Uint64(), args.Value.BigInt(), args.Gas.BigInt(), args.GasPrice.BigInt(), common.FromHex(args.Data))
} else {
tx = types.NewTransaction(args.Nonce.Uint64(), *args.To, args.Value.BigInt(), args.Gas.BigInt(), args.GasPrice.BigInt(), common.FromHex(args.Data))
}
signature, err := s.am.SignWithPassphrase(args.From, passwd, tx.SigHash().Bytes())
if err != nil {
return common.Hash{}, err
}
return submitTransaction(ctx, s.b, tx, signature)
}
// SignAndSendTransaction was renamed to SendTransaction. This method is deprecated
// and will be removed in the future. It primary goal is to give clients time to update.
func (s *PrivateAccountAPI) SignAndSendTransaction(ctx context.Context, args SendTxArgs, passwd string) (common.Hash, error) {
return s.SendTransaction(ctx, args, passwd)
}
// PublicBlockChainAPI provides an API to access the Ethereum blockchain.
// It offers only methods that operate on public data that is freely available to anyone.
type PublicBlockChainAPI struct {
b Backend
}
// NewPublicBlockChainAPI creates a new Etheruem blockchain API.
func NewPublicBlockChainAPI(b Backend) *PublicBlockChainAPI {
return &PublicBlockChainAPI{b}
}
// BlockNumber returns the block number of the chain head.
func (s *PublicBlockChainAPI) BlockNumber() *big.Int {
return s.b.HeaderByNumber(rpc.LatestBlockNumber).Number
}
// GetBalance returns the amount of wei for the given address in the state of the
// given block number. The rpc.LatestBlockNumber and rpc.PendingBlockNumber meta
// block numbers are also allowed.
func (s *PublicBlockChainAPI) GetBalance(ctx context.Context, address common.Address, blockNr rpc.BlockNumber) (*big.Int, error) {
state, _, err := s.b.StateAndHeaderByNumber(blockNr)
if state == nil || err != nil {
return nil, err
}
return state.GetBalance(ctx, address)
}
// GetBlockByNumber returns the requested block. When blockNr is -1 the chain head is returned. When fullTx is true all
// transactions in the block are returned in full detail, otherwise only the transaction hash is returned.
func (s *PublicBlockChainAPI) GetBlockByNumber(ctx context.Context, blockNr rpc.BlockNumber, fullTx bool) (map[string]interface{}, error) {
block, err := s.b.BlockByNumber(ctx, blockNr)
if block != nil {
response, err := s.rpcOutputBlock(block, true, fullTx)
if err == nil && blockNr == rpc.PendingBlockNumber {
// Pending blocks need to nil out a few fields
for _, field := range []string{"hash", "nonce", "logsBloom", "miner"} {
response[field] = nil
}
}
return response, err
}
return nil, err
}
// GetBlockByHash returns the requested block. When fullTx is true all transactions in the block are returned in full
// detail, otherwise only the transaction hash is returned.
func (s *PublicBlockChainAPI) GetBlockByHash(ctx context.Context, blockHash common.Hash, fullTx bool) (map[string]interface{}, error) {
block, err := s.b.GetBlock(ctx, blockHash)
if block != nil {
return s.rpcOutputBlock(block, true, fullTx)
}
return nil, err
}
// GetUncleByBlockNumberAndIndex returns the uncle block for the given block hash and index. When fullTx is true
// all transactions in the block are returned in full detail, otherwise only the transaction hash is returned.
func (s *PublicBlockChainAPI) GetUncleByBlockNumberAndIndex(ctx context.Context, blockNr rpc.BlockNumber, index rpc.HexNumber) (map[string]interface{}, error) {
block, err := s.b.BlockByNumber(ctx, blockNr)
if block != nil {
uncles := block.Uncles()
if index.Int() < 0 || index.Int() >= len(uncles) {
glog.V(logger.Debug).Infof("uncle block on index %d not found for block #%d", index.Int(), blockNr)
return nil, nil
}
block = types.NewBlockWithHeader(uncles[index.Int()])
return s.rpcOutputBlock(block, false, false)
}
return nil, err
}
// GetUncleByBlockHashAndIndex returns the uncle block for the given block hash and index. When fullTx is true
// all transactions in the block are returned in full detail, otherwise only the transaction hash is returned.
func (s *PublicBlockChainAPI) GetUncleByBlockHashAndIndex(ctx context.Context, blockHash common.Hash, index rpc.HexNumber) (map[string]interface{}, error) {
block, err := s.b.GetBlock(ctx, blockHash)
if block != nil {
uncles := block.Uncles()
if index.Int() < 0 || index.Int() >= len(uncles) {
glog.V(logger.Debug).Infof("uncle block on index %d not found for block %s", index.Int(), blockHash.Hex())
return nil, nil
}
block = types.NewBlockWithHeader(uncles[index.Int()])
return s.rpcOutputBlock(block, false, false)
}
return nil, err
}
// GetUncleCountByBlockNumber returns number of uncles in the block for the given block number
func (s *PublicBlockChainAPI) GetUncleCountByBlockNumber(ctx context.Context, blockNr rpc.BlockNumber) *rpc.HexNumber {
if block, _ := s.b.BlockByNumber(ctx, blockNr); block != nil {
return rpc.NewHexNumber(len(block.Uncles()))
}
return nil
}
// GetUncleCountByBlockHash returns number of uncles in the block for the given block hash
func (s *PublicBlockChainAPI) GetUncleCountByBlockHash(ctx context.Context, blockHash common.Hash) *rpc.HexNumber {
if block, _ := s.b.GetBlock(ctx, blockHash); block != nil {
return rpc.NewHexNumber(len(block.Uncles()))
}
return nil
}
// GetCode returns the code stored at the given address in the state for the given block number.
func (s *PublicBlockChainAPI) GetCode(ctx context.Context, address common.Address, blockNr rpc.BlockNumber) (string, error) {
state, _, err := s.b.StateAndHeaderByNumber(blockNr)
if state == nil || err != nil {
return "", err
}
res, err := state.GetCode(ctx, address)
if len(res) == 0 || err != nil { // backwards compatibility
return "0x", err
}
return common.ToHex(res), nil
}
// GetStorageAt returns the storage from the state at the given address, key and
// block number. The rpc.LatestBlockNumber and rpc.PendingBlockNumber meta block
// numbers are also allowed.
func (s *PublicBlockChainAPI) GetStorageAt(ctx context.Context, address common.Address, key string, blockNr rpc.BlockNumber) (string, error) {
state, _, err := s.b.StateAndHeaderByNumber(blockNr)
if state == nil || err != nil {
return "0x", err
}
res, err := state.GetState(ctx, address, common.HexToHash(key))
if err != nil {
return "0x", err
}
return res.Hex(), nil
}
// callmsg is the message type used for call transations.
type callmsg struct {
addr common.Address
to *common.Address
gas, gasPrice *big.Int
value *big.Int
data []byte
}
// accessor boilerplate to implement core.Message
func (m callmsg) From() (common.Address, error) { return m.addr, nil }
func (m callmsg) FromFrontier() (common.Address, error) { return m.addr, nil }
func (m callmsg) Nonce() uint64 { return 0 }
func (m callmsg) CheckNonce() bool { return false }
func (m callmsg) To() *common.Address { return m.to }
func (m callmsg) GasPrice() *big.Int { return m.gasPrice }
func (m callmsg) Gas() *big.Int { return m.gas }
func (m callmsg) Value() *big.Int { return m.value }
func (m callmsg) Data() []byte { return m.data }
// CallArgs represents the arguments for a call.
type CallArgs struct {
From common.Address `json:"from"`
To *common.Address `json:"to"`
Gas rpc.HexNumber `json:"gas"`
GasPrice rpc.HexNumber `json:"gasPrice"`
Value rpc.HexNumber `json:"value"`
Data string `json:"data"`
}
func (s *PublicBlockChainAPI) doCall(ctx context.Context, args CallArgs, blockNr rpc.BlockNumber) (string, *big.Int, error) {
state, header, err := s.b.StateAndHeaderByNumber(blockNr)
if state == nil || err != nil {
return "0x", common.Big0, err
}
// Set the account address to interact with
var addr common.Address
if args.From == (common.Address{}) {
accounts := s.b.AccountManager().Accounts()
if len(accounts) == 0 {
addr = common.Address{}
} else {
addr = accounts[0].Address
}
} else {
addr = args.From
}
// Assemble the CALL invocation
msg := callmsg{
addr: addr,
to: args.To,
gas: args.Gas.BigInt(),
gasPrice: args.GasPrice.BigInt(),
value: args.Value.BigInt(),
data: common.FromHex(args.Data),
}
if msg.gas.Cmp(common.Big0) == 0 {
msg.gas = big.NewInt(50000000)
}
if msg.gasPrice.Cmp(common.Big0) == 0 {
msg.gasPrice = new(big.Int).Mul(big.NewInt(50), common.Shannon)
}
// Execute the call and return
vmenv, vmError, err := s.b.GetVMEnv(ctx, msg, state, header)
if err != nil {
return "0x", common.Big0, err
}
gp := new(core.GasPool).AddGas(common.MaxBig)
res, gas, err := core.ApplyMessage(vmenv, msg, gp)
if err := vmError(); err != nil {
return "0x", common.Big0, err
}
if len(res) == 0 { // backwards compatability
return "0x", gas, err
}
return common.ToHex(res), gas, err
}
// Call executes the given transaction on the state for the given block number.
// It doesn't make and changes in the state/blockchain and is usefull to execute and retrieve values.
func (s *PublicBlockChainAPI) Call(ctx context.Context, args CallArgs, blockNr rpc.BlockNumber) (string, error) {
result, _, err := s.doCall(ctx, args, blockNr)
return result, err
}
// EstimateGas returns an estimate of the amount of gas needed to execute the given transaction.
func (s *PublicBlockChainAPI) EstimateGas(ctx context.Context, args CallArgs) (*rpc.HexNumber, error) {
_, gas, err := s.doCall(ctx, args, rpc.PendingBlockNumber)
return rpc.NewHexNumber(gas), err
}
// ExecutionResult groups all structured logs emitted by the EVM
// while replaying a transaction in debug mode as well as the amount of
// gas used and the return value
type ExecutionResult struct {
Gas *big.Int `json:"gas"`
ReturnValue string `json:"returnValue"`
StructLogs []StructLogRes `json:"structLogs"`
}
// StructLogRes stores a structured log emitted by the EVM while replaying a
// transaction in debug mode
type StructLogRes struct {
Pc uint64 `json:"pc"`
Op string `json:"op"`
Gas *big.Int `json:"gas"`
GasCost *big.Int `json:"gasCost"`
Depth int `json:"depth"`
Error error `json:"error"`
Stack []string `json:"stack"`
Memory []string `json:"memory"`
Storage map[string]string `json:"storage"`
}
// formatLogs formats EVM returned structured logs for json output
func FormatLogs(structLogs []vm.StructLog) []StructLogRes {
formattedStructLogs := make([]StructLogRes, len(structLogs))
for index, trace := range structLogs {
formattedStructLogs[index] = StructLogRes{
Pc: trace.Pc,
Op: trace.Op.String(),
Gas: trace.Gas,
GasCost: trace.GasCost,
Depth: trace.Depth,
Error: trace.Err,
Stack: make([]string, len(trace.Stack)),
Storage: make(map[string]string),
}
for i, stackValue := range trace.Stack {
formattedStructLogs[index].Stack[i] = fmt.Sprintf("%x", common.LeftPadBytes(stackValue.Bytes(), 32))
}
for i := 0; i+32 <= len(trace.Memory); i += 32 {
formattedStructLogs[index].Memory = append(formattedStructLogs[index].Memory, fmt.Sprintf("%x", trace.Memory[i:i+32]))
}
for i, storageValue := range trace.Storage {
formattedStructLogs[index].Storage[fmt.Sprintf("%x", i)] = fmt.Sprintf("%x", storageValue)
}
}
return formattedStructLogs
}
// TraceCall executes a call and returns the amount of gas, created logs and optionally returned values.
func (s *PublicBlockChainAPI) TraceCall(ctx context.Context, args CallArgs, blockNr rpc.BlockNumber) (*ExecutionResult, error) {
state, header, err := s.b.StateAndHeaderByNumber(blockNr)
if state == nil || err != nil {
return nil, err
}
var addr common.Address
if args.From == (common.Address{}) {
accounts := s.b.AccountManager().Accounts()
if len(accounts) == 0 {
addr = common.Address{}
} else {
addr = accounts[0].Address
}
} else {
addr = args.From
}
// Assemble the CALL invocation
msg := callmsg{
addr: addr,
to: args.To,
gas: args.Gas.BigInt(),
gasPrice: args.GasPrice.BigInt(),
value: args.Value.BigInt(),
data: common.FromHex(args.Data),
}
if msg.gas.Cmp(common.Big0) == 0 {
msg.gas = big.NewInt(50000000)
}
if msg.gasPrice.Cmp(common.Big0) == 0 {
msg.gasPrice = new(big.Int).Mul(big.NewInt(50), common.Shannon)
}
// Execute the call and return
vmenv, vmError, err := s.b.GetVMEnv(ctx, msg, state, header)
if err != nil {
return nil, err
}
gp := new(core.GasPool).AddGas(common.MaxBig)
ret, gas, err := core.ApplyMessage(vmenv, msg, gp)
if err := vmError(); err != nil {
return nil, err
}
return &ExecutionResult{
Gas: gas,
ReturnValue: fmt.Sprintf("%x", ret),
StructLogs: FormatLogs(vmenv.StructLogs()),
}, nil
}
// rpcOutputBlock converts the given block to the RPC output which depends on fullTx. If inclTx is true transactions are
// returned. When fullTx is true the returned block contains full transaction details, otherwise it will only contain
// transaction hashes.
func (s *PublicBlockChainAPI) rpcOutputBlock(b *types.Block, inclTx bool, fullTx bool) (map[string]interface{}, error) {
fields := map[string]interface{}{
"number": rpc.NewHexNumber(b.Number()),
"hash": b.Hash(),
"parentHash": b.ParentHash(),
"nonce": b.Header().Nonce,
"sha3Uncles": b.UncleHash(),
"logsBloom": b.Bloom(),
"stateRoot": b.Root(),
"miner": b.Coinbase(),
"difficulty": rpc.NewHexNumber(b.Difficulty()),
"totalDifficulty": rpc.NewHexNumber(s.b.GetTd(b.Hash())),
"extraData": fmt.Sprintf("0x%x", b.Extra()),
"size": rpc.NewHexNumber(b.Size().Int64()),
"gasLimit": rpc.NewHexNumber(b.GasLimit()),
"gasUsed": rpc.NewHexNumber(b.GasUsed()),
"timestamp": rpc.NewHexNumber(b.Time()),
"transactionsRoot": b.TxHash(),
"receiptRoot": b.ReceiptHash(),
}
if inclTx {
formatTx := func(tx *types.Transaction) (interface{}, error) {
return tx.Hash(), nil
}
if fullTx {
formatTx = func(tx *types.Transaction) (interface{}, error) {
return newRPCTransaction(b, tx.Hash())
}
}
txs := b.Transactions()
transactions := make([]interface{}, len(txs))
var err error
for i, tx := range b.Transactions() {
if transactions[i], err = formatTx(tx); err != nil {
return nil, err
}
}
fields["transactions"] = transactions
}
uncles := b.Uncles()
uncleHashes := make([]common.Hash, len(uncles))
for i, uncle := range uncles {
uncleHashes[i] = uncle.Hash()
}
fields["uncles"] = uncleHashes
return fields, nil
}
// RPCTransaction represents a transaction that will serialize to the RPC representation of a transaction
type RPCTransaction struct {
BlockHash common.Hash `json:"blockHash"`
BlockNumber *rpc.HexNumber `json:"blockNumber"`
From common.Address `json:"from"`
Gas *rpc.HexNumber `json:"gas"`
GasPrice *rpc.HexNumber `json:"gasPrice"`
Hash common.Hash `json:"hash"`
Input string `json:"input"`
Nonce *rpc.HexNumber `json:"nonce"`
To *common.Address `json:"to"`
TransactionIndex *rpc.HexNumber `json:"transactionIndex"`
Value *rpc.HexNumber `json:"value"`
}
// newRPCPendingTransaction returns a pending transaction that will serialize to the RPC representation
func newRPCPendingTransaction(tx *types.Transaction) *RPCTransaction {
from, _ := tx.FromFrontier()
return &RPCTransaction{
From: from,
Gas: rpc.NewHexNumber(tx.Gas()),
GasPrice: rpc.NewHexNumber(tx.GasPrice()),
Hash: tx.Hash(),
Input: fmt.Sprintf("0x%x", tx.Data()),
Nonce: rpc.NewHexNumber(tx.Nonce()),
To: tx.To(),
Value: rpc.NewHexNumber(tx.Value()),
}
}
// newRPCTransaction returns a transaction that will serialize to the RPC representation.
func newRPCTransactionFromBlockIndex(b *types.Block, txIndex int) (*RPCTransaction, error) {
if txIndex >= 0 && txIndex < len(b.Transactions()) {
tx := b.Transactions()[txIndex]
from, err := tx.FromFrontier()
if err != nil {
return nil, err
}
return &RPCTransaction{
BlockHash: b.Hash(),
BlockNumber: rpc.NewHexNumber(b.Number()),
From: from,
Gas: rpc.NewHexNumber(tx.Gas()),
GasPrice: rpc.NewHexNumber(tx.GasPrice()),
Hash: tx.Hash(),
Input: fmt.Sprintf("0x%x", tx.Data()),
Nonce: rpc.NewHexNumber(tx.Nonce()),
To: tx.To(),
TransactionIndex: rpc.NewHexNumber(txIndex),
Value: rpc.NewHexNumber(tx.Value()),
}, nil
}
return nil, nil
}
// newRPCTransaction returns a transaction that will serialize to the RPC representation.
func newRPCTransaction(b *types.Block, txHash common.Hash) (*RPCTransaction, error) {
for idx, tx := range b.Transactions() {
if tx.Hash() == txHash {
return newRPCTransactionFromBlockIndex(b, idx)
}
}
return nil, nil
}
// PublicTransactionPoolAPI exposes methods for the RPC interface
type PublicTransactionPoolAPI struct {
b Backend
}
// NewPublicTransactionPoolAPI creates a new RPC service with methods specific for the transaction pool.
func NewPublicTransactionPoolAPI(b Backend) *PublicTransactionPoolAPI {
return &PublicTransactionPoolAPI{b}
}
func getTransaction(chainDb ethdb.Database, b Backend, txHash common.Hash) (*types.Transaction, bool, error) {
txData, err := chainDb.Get(txHash.Bytes())
isPending := false
tx := new(types.Transaction)
if err == nil && len(txData) > 0 {
if err := rlp.DecodeBytes(txData, tx); err != nil {
return nil, isPending, err
}
} else {
// pending transaction?
tx = b.GetPoolTransaction(txHash)
isPending = true
}
return tx, isPending, nil
}
// GetBlockTransactionCountByNumber returns the number of transactions in the block with the given block number.
func (s *PublicTransactionPoolAPI) GetBlockTransactionCountByNumber(ctx context.Context, blockNr rpc.BlockNumber) *rpc.HexNumber {
if block, _ := s.b.BlockByNumber(ctx, blockNr); block != nil {
return rpc.NewHexNumber(len(block.Transactions()))
}
return nil
}
// GetBlockTransactionCountByHash returns the number of transactions in the block with the given hash.
func (s *PublicTransactionPoolAPI) GetBlockTransactionCountByHash(ctx context.Context, blockHash common.Hash) *rpc.HexNumber {
if block, _ := s.b.GetBlock(ctx, blockHash); block != nil {
return rpc.NewHexNumber(len(block.Transactions()))
}
return nil
}
// GetTransactionByBlockNumberAndIndex returns the transaction for the given block number and index.
func (s *PublicTransactionPoolAPI) GetTransactionByBlockNumberAndIndex(ctx context.Context, blockNr rpc.BlockNumber, index rpc.HexNumber) (*RPCTransaction, error) {
if block, _ := s.b.BlockByNumber(ctx, blockNr); block != nil {
return newRPCTransactionFromBlockIndex(block, index.Int())
}
return nil, nil
}
// GetTransactionByBlockHashAndIndex returns the transaction for the given block hash and index.
func (s *PublicTransactionPoolAPI) GetTransactionByBlockHashAndIndex(ctx context.Context, blockHash common.Hash, index rpc.HexNumber) (*RPCTransaction, error) {
if block, _ := s.b.GetBlock(ctx, blockHash); block != nil {
return newRPCTransactionFromBlockIndex(block, index.Int())
}
return nil, nil
}
// GetTransactionCount returns the number of transactions the given address has sent for the given block number
func (s *PublicTransactionPoolAPI) GetTransactionCount(ctx context.Context, address common.Address, blockNr rpc.BlockNumber) (*rpc.HexNumber, error) {
state, _, err := s.b.StateAndHeaderByNumber(blockNr)
if state == nil || err != nil {
return nil, err
}
nonce, err := state.GetNonce(ctx, address)
if err != nil {
return nil, err
}
return rpc.NewHexNumber(nonce), nil
}
// getTransactionBlockData fetches the meta data for the given transaction from the chain database. This is useful to
// retrieve block information for a hash. It returns the block hash, block index and transaction index.
func getTransactionBlockData(chainDb ethdb.Database, txHash common.Hash) (common.Hash, uint64, uint64, error) {
var txBlock struct {
BlockHash common.Hash
BlockIndex uint64
Index uint64
}
blockData, err := chainDb.Get(append(txHash.Bytes(), 0x0001))
if err != nil {
return common.Hash{}, uint64(0), uint64(0), err
}
reader := bytes.NewReader(blockData)
if err = rlp.Decode(reader, &txBlock); err != nil {
return common.Hash{}, uint64(0), uint64(0), err
}
return txBlock.BlockHash, txBlock.BlockIndex, txBlock.Index, nil
}
// GetTransactionByHash returns the transaction for the given hash
func (s *PublicTransactionPoolAPI) GetTransactionByHash(ctx context.Context, txHash common.Hash) (*RPCTransaction, error) {
var tx *types.Transaction
var isPending bool
var err error
if tx, isPending, err = getTransaction(s.b.ChainDb(), s.b, txHash); err != nil {
glog.V(logger.Debug).Infof("%v\n", err)
return nil, nil
} else if tx == nil {
return nil, nil
}
if isPending {
return newRPCPendingTransaction(tx), nil
}
blockHash, _, _, err := getTransactionBlockData(s.b.ChainDb(), txHash)
if err != nil {
glog.V(logger.Debug).Infof("%v\n", err)
return nil, nil
}
if block, _ := s.b.GetBlock(ctx, blockHash); block != nil {
return newRPCTransaction(block, txHash)
}
return nil, nil
}
// GetTransactionReceipt returns the transaction receipt for the given transaction hash.
func (s *PublicTransactionPoolAPI) GetTransactionReceipt(txHash common.Hash) (map[string]interface{}, error) {
receipt := core.GetReceipt(s.b.ChainDb(), txHash)
if receipt == nil {
glog.V(logger.Debug).Infof("receipt not found for transaction %s", txHash.Hex())
return nil, nil
}
tx, _, err := getTransaction(s.b.ChainDb(), s.b, txHash)
if err != nil {
glog.V(logger.Debug).Infof("%v\n", err)
return nil, nil
}
txBlock, blockIndex, index, err := getTransactionBlockData(s.b.ChainDb(), txHash)
if err != nil {
glog.V(logger.Debug).Infof("%v\n", err)
return nil, nil
}
from, err := tx.FromFrontier()
if err != nil {
glog.V(logger.Debug).Infof("%v\n", err)
return nil, nil
}
fields := map[string]interface{}{
"root": common.Bytes2Hex(receipt.PostState),
"blockHash": txBlock,
"blockNumber": rpc.NewHexNumber(blockIndex),
"transactionHash": txHash,
"transactionIndex": rpc.NewHexNumber(index),
"from": from,
"to": tx.To(),
"gasUsed": rpc.NewHexNumber(receipt.GasUsed),
"cumulativeGasUsed": rpc.NewHexNumber(receipt.CumulativeGasUsed),
"contractAddress": nil,
"logs": receipt.Logs,
}
if receipt.Logs == nil {
fields["logs"] = []vm.Logs{}
}
// If the ContractAddress is 20 0x0 bytes, assume it is not a contract creation
if bytes.Compare(receipt.ContractAddress.Bytes(), bytes.Repeat([]byte{0}, 20)) != 0 {
fields["contractAddress"] = receipt.ContractAddress
}
return fields, nil
}
// sign is a helper function that signs a transaction with the private key of the given address.
func (s *PublicTransactionPoolAPI) sign(addr common.Address, tx *types.Transaction) (*types.Transaction, error) {
signature, err := s.b.AccountManager().Sign(addr, tx.SigHash().Bytes())
if err != nil {
return nil, err
}
return tx.WithSignature(signature)
}
// SendTxArgs represents the arguments to sumbit a new transaction into the transaction pool.
type SendTxArgs struct {
From common.Address `json:"from"`
To *common.Address `json:"to"`
Gas *rpc.HexNumber `json:"gas"`
GasPrice *rpc.HexNumber `json:"gasPrice"`
Value *rpc.HexNumber `json:"value"`
Data string `json:"data"`
Nonce *rpc.HexNumber `json:"nonce"`
}
// prepareSendTxArgs is a helper function that fills in default values for unspecified tx fields.
func prepareSendTxArgs(ctx context.Context, args SendTxArgs, b Backend) (SendTxArgs, error) {
if args.Gas == nil {
args.Gas = rpc.NewHexNumber(defaultGas)
}
if args.GasPrice == nil {
price, err := b.SuggestPrice(ctx)
if err != nil {
return args, err
}
args.GasPrice = rpc.NewHexNumber(price)
}
if args.Value == nil {
args.Value = rpc.NewHexNumber(0)
}
return args, nil
}
// submitTransaction is a helper function that submits tx to txPool and creates a log entry.
func submitTransaction(ctx context.Context, b Backend, tx *types.Transaction, signature []byte) (common.Hash, error) {
signedTx, err := tx.WithSignature(signature)
if err != nil {
return common.Hash{}, err
}
if err := b.SendTx(ctx, signedTx); err != nil {
return common.Hash{}, err
}
if signedTx.To() == nil {
from, _ := signedTx.From()
addr := crypto.CreateAddress(from, signedTx.Nonce())
glog.V(logger.Info).Infof("Tx(%s) created: %s\n", signedTx.Hash().Hex(), addr.Hex())
} else {
glog.V(logger.Info).Infof("Tx(%s) to: %s\n", signedTx.Hash().Hex(), tx.To().Hex())
}
return signedTx.Hash(), nil
}
// SendTransaction creates a transaction for the given argument, sign it and submit it to the
// transaction pool.
func (s *PublicTransactionPoolAPI) SendTransaction(ctx context.Context, args SendTxArgs) (common.Hash, error) {
var err error
args, err = prepareSendTxArgs(ctx, args, s.b)
if err != nil {
return common.Hash{}, err
}
if args.Nonce == nil {
nonce, err := s.b.GetPoolNonce(ctx, args.From)
if err != nil {
return common.Hash{}, err
}
args.Nonce = rpc.NewHexNumber(nonce)
}
var tx *types.Transaction
if args.To == nil {
tx = types.NewContractCreation(args.Nonce.Uint64(), args.Value.BigInt(), args.Gas.BigInt(), args.GasPrice.BigInt(), common.FromHex(args.Data))
} else {
tx = types.NewTransaction(args.Nonce.Uint64(), *args.To, args.Value.BigInt(), args.Gas.BigInt(), args.GasPrice.BigInt(), common.FromHex(args.Data))
}
signature, err := s.b.AccountManager().Sign(args.From, tx.SigHash().Bytes())
if err != nil {
return common.Hash{}, err
}
return submitTransaction(ctx, s.b, tx, signature)
}
// SendRawTransaction will add the signed transaction to the transaction pool.
// The sender is responsible for signing the transaction and using the correct nonce.
func (s *PublicTransactionPoolAPI) SendRawTransaction(ctx context.Context, encodedTx string) (string, error) {
tx := new(types.Transaction)
if err := rlp.DecodeBytes(common.FromHex(encodedTx), tx); err != nil {
return "", err
}
if err := s.b.SendTx(ctx, tx); err != nil {
return "", err
}
if tx.To() == nil {
from, err := tx.FromFrontier()
if err != nil {
return "", err
}
addr := crypto.CreateAddress(from, tx.Nonce())
glog.V(logger.Info).Infof("Tx(%x) created: %x\n", tx.Hash(), addr)
} else {
glog.V(logger.Info).Infof("Tx(%x) to: %x\n", tx.Hash(), tx.To())
}
return tx.Hash().Hex(), nil
}
// Sign signs the given hash using the key that matches the address. The key must be
// unlocked in order to sign the hash.
func (s *PublicTransactionPoolAPI) Sign(addr common.Address, hash common.Hash) (string, error) {
signature, error := s.b.AccountManager().Sign(addr, hash[:])
return common.ToHex(signature), error
}
// SignTransactionArgs represents the arguments to sign a transaction.
type SignTransactionArgs struct {
From common.Address
To *common.Address
Nonce *rpc.HexNumber
Value *rpc.HexNumber
Gas *rpc.HexNumber
GasPrice *rpc.HexNumber
Data string
BlockNumber int64
}
// Tx is a helper object for argument and return values
type Tx struct {
tx *types.Transaction
To *common.Address `json:"to"`
From common.Address `json:"from"`
Nonce *rpc.HexNumber `json:"nonce"`
Value *rpc.HexNumber `json:"value"`
Data string `json:"data"`
GasLimit *rpc.HexNumber `json:"gas"`
GasPrice *rpc.HexNumber `json:"gasPrice"`
Hash common.Hash `json:"hash"`
}
// UnmarshalJSON parses JSON data into tx.
func (tx *Tx) UnmarshalJSON(b []byte) (err error) {
req := struct {
To *common.Address `json:"to"`
From common.Address `json:"from"`
Nonce *rpc.HexNumber `json:"nonce"`
Value *rpc.HexNumber `json:"value"`
Data string `json:"data"`
GasLimit *rpc.HexNumber `json:"gas"`
GasPrice *rpc.HexNumber `json:"gasPrice"`
Hash common.Hash `json:"hash"`
}{}
if err := json.Unmarshal(b, &req); err != nil {
return err
}
tx.To = req.To
tx.From = req.From
tx.Nonce = req.Nonce
tx.Value = req.Value
tx.Data = req.Data
tx.GasLimit = req.GasLimit
tx.GasPrice = req.GasPrice
tx.Hash = req.Hash
data := common.Hex2Bytes(tx.Data)
if tx.Nonce == nil {
return fmt.Errorf("need nonce")
}
if tx.Value == nil {
tx.Value = rpc.NewHexNumber(0)
}
if tx.GasLimit == nil {
tx.GasLimit = rpc.NewHexNumber(0)
}
if tx.GasPrice == nil {
tx.GasPrice = rpc.NewHexNumber(int64(50000000000))
}
if req.To == nil {
tx.tx = types.NewContractCreation(tx.Nonce.Uint64(), tx.Value.BigInt(), tx.GasLimit.BigInt(), tx.GasPrice.BigInt(), data)
} else {
tx.tx = types.NewTransaction(tx.Nonce.Uint64(), *tx.To, tx.Value.BigInt(), tx.GasLimit.BigInt(), tx.GasPrice.BigInt(), data)
}
return nil
}
// SignTransactionResult represents a RLP encoded signed transaction.
type SignTransactionResult struct {
Raw string `json:"raw"`
Tx *Tx `json:"tx"`
}
func newTx(t *types.Transaction) *Tx {
from, _ := t.FromFrontier()
return &Tx{
tx: t,
To: t.To(),
From: from,
Value: rpc.NewHexNumber(t.Value()),
Nonce: rpc.NewHexNumber(t.Nonce()),
Data: "0x" + common.Bytes2Hex(t.Data()),
GasLimit: rpc.NewHexNumber(t.Gas()),
GasPrice: rpc.NewHexNumber(t.GasPrice()),
Hash: t.Hash(),
}
}
// SignTransaction will sign the given transaction with the from account.
// The node needs to have the private key of the account corresponding with
// the given from address and it needs to be unlocked.
func (s *PublicTransactionPoolAPI) SignTransaction(ctx context.Context, args SignTransactionArgs) (*SignTransactionResult, error) {
if args.Gas == nil {
args.Gas = rpc.NewHexNumber(defaultGas)
}
if args.GasPrice == nil {
price, err := s.b.SuggestPrice(ctx)
if err != nil {
return nil, err
}
args.GasPrice = rpc.NewHexNumber(price)
}
if args.Value == nil {
args.Value = rpc.NewHexNumber(0)
}
if args.Nonce == nil {
nonce, err := s.b.GetPoolNonce(ctx, args.From)
if err != nil {
return nil, err
}
args.Nonce = rpc.NewHexNumber(nonce)
}
var tx *types.Transaction
if args.To == nil {
tx = types.NewContractCreation(args.Nonce.Uint64(), args.Value.BigInt(), args.Gas.BigInt(), args.GasPrice.BigInt(), common.FromHex(args.Data))
} else {
tx = types.NewTransaction(args.Nonce.Uint64(), *args.To, args.Value.BigInt(), args.Gas.BigInt(), args.GasPrice.BigInt(), common.FromHex(args.Data))
}
signedTx, err := s.sign(args.From, tx)
if err != nil {
return nil, err
}
data, err := rlp.EncodeToBytes(signedTx)
if err != nil {
return nil, err
}
return &SignTransactionResult{"0x" + common.Bytes2Hex(data), newTx(signedTx)}, nil
}
// PendingTransactions returns the transactions that are in the transaction pool and have a from address that is one of
// the accounts this node manages.
func (s *PublicTransactionPoolAPI) PendingTransactions() []*RPCTransaction {
pending := s.b.GetPoolTransactions()
transactions := make([]*RPCTransaction, 0, len(pending))
for _, tx := range pending {
from, _ := tx.FromFrontier()
if s.b.AccountManager().HasAddress(from) {
transactions = append(transactions, newRPCPendingTransaction(tx))
}
}
return transactions
}
// Resend accepts an existing transaction and a new gas price and limit. It will remove the given transaction from the
// pool and reinsert it with the new gas price and limit.
func (s *PublicTransactionPoolAPI) Resend(ctx context.Context, tx *Tx, gasPrice, gasLimit *rpc.HexNumber) (common.Hash, error) {
pending := s.b.GetPoolTransactions()
for _, p := range pending {
if pFrom, err := p.FromFrontier(); err == nil && pFrom == tx.From && p.SigHash() == tx.tx.SigHash() {
if gasPrice == nil {
gasPrice = rpc.NewHexNumber(tx.tx.GasPrice())
}
if gasLimit == nil {
gasLimit = rpc.NewHexNumber(tx.tx.Gas())
}
var newTx *types.Transaction
if tx.tx.To() == nil {
newTx = types.NewContractCreation(tx.tx.Nonce(), tx.tx.Value(), gasPrice.BigInt(), gasLimit.BigInt(), tx.tx.Data())
} else {
newTx = types.NewTransaction(tx.tx.Nonce(), *tx.tx.To(), tx.tx.Value(), gasPrice.BigInt(), gasLimit.BigInt(), tx.tx.Data())
}
signedTx, err := s.sign(tx.From, newTx)
if err != nil {
return common.Hash{}, err
}
s.b.RemoveTx(tx.Hash)
if err = s.b.SendTx(ctx, signedTx); err != nil {
return common.Hash{}, err
}
return signedTx.Hash(), nil
}
}
return common.Hash{}, fmt.Errorf("Transaction %#x not found", tx.Hash)
}
// PrivateAdminAPI is the collection of Etheruem APIs exposed over the private
// admin endpoint.
type PrivateAdminAPI struct {
b Backend
solcPath *string
solc **compiler.Solidity
}
// NewPrivateAdminAPI creates a new API definition for the private admin methods
// of the Ethereum service.
func NewPrivateAdminAPI(b Backend, solcPath *string, solc **compiler.Solidity) *PrivateAdminAPI {
return &PrivateAdminAPI{b, solcPath, solc}
}
// SetSolc sets the Solidity compiler path to be used by the node.
func (api *PrivateAdminAPI) SetSolc(path string) (string, error) {
var err error
*api.solcPath = path
*api.solc, err = compiler.New(path)
if err != nil {
return "", err
}
return (*api.solc).Info(), nil
}
// PublicDebugAPI is the collection of Etheruem APIs exposed over the public
// debugging endpoint.
type PublicDebugAPI struct {
b Backend
}
// NewPublicDebugAPI creates a new API definition for the public debug methods
// of the Ethereum service.
func NewPublicDebugAPI(b Backend) *PublicDebugAPI {
return &PublicDebugAPI{b: b}
}
// GetBlockRlp retrieves the RLP encoded for of a single block.
func (api *PublicDebugAPI) GetBlockRlp(ctx context.Context, number uint64) (string, error) {
block, _ := api.b.BlockByNumber(ctx, rpc.BlockNumber(number))
if block == nil {
return "", fmt.Errorf("block #%d not found", number)
}
encoded, err := rlp.EncodeToBytes(block)
if err != nil {
return "", err
}
return fmt.Sprintf("%x", encoded), nil
}
// PrintBlock retrieves a block and returns its pretty printed form.
func (api *PublicDebugAPI) PrintBlock(ctx context.Context, number uint64) (string, error) {
block, _ := api.b.BlockByNumber(ctx, rpc.BlockNumber(number))
if block == nil {
return "", fmt.Errorf("block #%d not found", number)
}
return fmt.Sprintf("%s", block), nil
}
// SeedHash retrieves the seed hash of a block.
func (api *PublicDebugAPI) SeedHash(ctx context.Context, number uint64) (string, error) {
block, _ := api.b.BlockByNumber(ctx, rpc.BlockNumber(number))
if block == nil {
return "", fmt.Errorf("block #%d not found", number)
}
hash, err := ethash.GetSeedHash(number)
if err != nil {
return "", err
}
return fmt.Sprintf("0x%x", hash), nil
}
// PrivateDebugAPI is the collection of Etheruem APIs exposed over the private
// debugging endpoint.
type PrivateDebugAPI struct {
b Backend
}
// NewPrivateDebugAPI creates a new API definition for the private debug methods
// of the Ethereum service.
func NewPrivateDebugAPI(b Backend) *PrivateDebugAPI {
return &PrivateDebugAPI{b: b}
}
// ChaindbProperty returns leveldb properties of the chain database.
func (api *PrivateDebugAPI) ChaindbProperty(property string) (string, error) {
ldb, ok := api.b.ChainDb().(interface {
LDB() *leveldb.DB
})
if !ok {
return "", fmt.Errorf("chaindbProperty does not work for memory databases")
}
if property == "" {
property = "leveldb.stats"
} else if !strings.HasPrefix(property, "leveldb.") {
property = "leveldb." + property
}
return ldb.LDB().GetProperty(property)
}
// SetHead rewinds the head of the blockchain to a previous block.
func (api *PrivateDebugAPI) SetHead(number uint64) {
api.b.SetHead(number)
}
// PublicNetAPI offers network related RPC methods
type PublicNetAPI struct {
net *p2p.Server
networkVersion int
}
// NewPublicNetAPI creates a new net API instance.
func NewPublicNetAPI(net *p2p.Server, networkVersion int) *PublicNetAPI {
return &PublicNetAPI{net, networkVersion}
}
// Listening returns an indication if the node is listening for network connections.
func (s *PublicNetAPI) Listening() bool {
return true // always listening
}
// PeerCount returns the number of connected peers
func (s *PublicNetAPI) PeerCount() *rpc.HexNumber {
return rpc.NewHexNumber(s.net.PeerCount())
}
// Version returns the current ethereum protocol version.
func (s *PublicNetAPI) Version() string {
return fmt.Sprintf("%d", s.networkVersion)
}
