+// Copyright 2017 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 (

+ "sync"

+

+ "github.com/ethereum/go-ethereum/common"

+)

+

+type AddrLocker struct {

+ mu sync.Mutex

+ locks map[common.Address]*sync.Mutex

+}

+

+// lock returns the lock of the given address.

+func (l *AddrLocker) lock(address common.Address) *sync.Mutex {

+ l.mu.Lock()

+ defer l.mu.Unlock()

+ if l.locks == nil {

+ l.locks = make(map[common.Address]*sync.Mutex)

+ }

+ if _, ok := l.locks[address]; !ok {

+ l.locks[address] = new(sync.Mutex)

+ }

+ return l.locks[address]

+}

+

+// LockAddr locks an account's mutex. This is used to prevent another tx getting the

+// same nonce until the lock is released. The mutex prevents the (an identical nonce) from

+// being read again during the time that the first transaction is being signed.

+func (l *AddrLocker) LockAddr(address common.Address) {

+ l.lock(address).Lock()

+}

+

+// UnlockAddr unlocks the mutex of the given account.

+func (l *AddrLocker) UnlockAddr(address common.Address) {

+ l.lock(address).Unlock()

+}

+// Copyright 2015 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"

+ "context"

+ "errors"

+ "fmt"

+ "math/big"

+ "strings"

+ "time"

+

+ "github.com/davecgh/go-spew/spew"

+ "github.com/ethereum/go-ethereum/accounts"

+ "github.com/ethereum/go-ethereum/accounts/keystore"

+ "github.com/ethereum/go-ethereum/accounts/scwallet"

+ "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/clique"

+ "github.com/ethereum/go-ethereum/consensus/ethash"

+ "github.com/ethereum/go-ethereum/core"

+ "github.com/ethereum/go-ethereum/core/rawdb"

+ "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/log"

+ "github.com/ethereum/go-ethereum/p2p"

+ "github.com/ethereum/go-ethereum/params"

+ "github.com/ethereum/go-ethereum/rlp"

+ "github.com/ethereum/go-ethereum/rpc"

+ "github.com/tyler-smith/go-bip39"

+)

+

+const (

+ defaultGasPrice = params.GWei

+)

+

+// 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

+}

+

+// NewPublicEthereumAPI creates a new Ethereum protocol API.

+func NewPublicEthereumAPI(b Backend) *PublicEthereumAPI {

+ return &PublicEthereumAPI{b}

+}

+

+// GasPrice returns a suggestion for a gas price.

+func (s *PublicEthereumAPI) GasPrice(ctx context.Context) (*hexutil.Big, error) {

+ price, err := s.b.SuggestPrice(ctx)

+ return (*hexutil.Big)(price), err

+}

+

+// ProtocolVersion returns the current Ethereum protocol version this node supports

+func (s *PublicEthereumAPI) ProtocolVersion() hexutil.Uint {

+ return hexutil.Uint(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) {

+ progress := s.b.Downloader().Progress()

+

+ // Return not syncing if the synchronisation already completed

+ if progress.CurrentBlock >= progress.HighestBlock {

+ return false, nil

+ }

+ // Otherwise gather the block sync stats

+ return map[string]interface{}{

+ "startingBlock": hexutil.Uint64(progress.StartingBlock),

+ "currentBlock": hexutil.Uint64(progress.CurrentBlock),

+ "highestBlock": hexutil.Uint64(progress.HighestBlock),

+ "pulledStates": hexutil.Uint64(progress.PulledStates),

+ "knownStates": hexutil.Uint64(progress.KnownStates),

+ }, 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, txs := range pending {

+ dump := make(map[string]*RPCTransaction)

+ for _, tx := range txs {

+ dump[fmt.Sprintf("%d", tx.Nonce())] = newRPCPendingTransaction(tx)

+ }

+ content["pending"][account.Hex()] = dump

+ }

+ // Flatten the queued transactions

+ for account, txs := range queue {

+ dump := make(map[string]*RPCTransaction)

+ for _, tx := range txs {

+ dump[fmt.Sprintf("%d", tx.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]hexutil.Uint {

+ pending, queue := s.b.Stats()

+ return map[string]hexutil.Uint{

+ "pending": hexutil.Uint(pending),

+ "queued": hexutil.Uint(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 gas × %v wei", tx.To().Hex(), tx.Value(), tx.Gas(), tx.GasPrice())

+ }

+ return fmt.Sprintf("contract creation: %v wei + %v gas × %v wei", tx.Value(), tx.Gas(), tx.GasPrice())

+ }

+ // Flatten the pending transactions

+ for account, txs := range pending {

+ dump := make(map[string]string)

+ for _, tx := range txs {

+ dump[fmt.Sprintf("%d", tx.Nonce())] = format(tx)

+ }

+ content["pending"][account.Hex()] = dump

+ }

+ // Flatten the queued transactions

+ for account, txs := range queue {

+ dump := make(map[string]string)

+ for _, tx := range txs {

+ dump[fmt.Sprintf("%d", tx.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() []common.Address {

+ 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

+ nonceLock *AddrLocker

+ b Backend

+}

+

+// NewPrivateAccountAPI create a new PrivateAccountAPI.

+func NewPrivateAccountAPI(b Backend, nonceLock *AddrLocker) *PrivateAccountAPI {

+ return &PrivateAccountAPI{

+ am: b.AccountManager(),

+ nonceLock: nonceLock,

+ b: b,

+ }

+}

+

+// listAccounts will return a list of addresses for accounts this node manages.

+func (s *PrivateAccountAPI) ListAccounts() []common.Address {

+ return s.am.Accounts()

+}

+

+// rawWallet is a JSON representation of an accounts.Wallet interface, with its

+// data contents extracted into plain fields.

+type rawWallet struct {

+ URL string `json:"url"`

+ Status string `json:"status"`

+ Failure string `json:"failure,omitempty"`

+ Accounts []accounts.Account `json:"accounts,omitempty"`

+}

+

+// ListWallets will return a list of wallets this node manages.

+func (s *PrivateAccountAPI) ListWallets() []rawWallet {

+ wallets := make([]rawWallet, 0) // return [] instead of nil if empty

+ for _, wallet := range s.am.Wallets() {

+ status, failure := wallet.Status()

+

+ raw := rawWallet{

+ URL: wallet.URL().String(),

+ Status: status,

+ Accounts: wallet.Accounts(),

+ }

+ if failure != nil {

+ raw.Failure = failure.Error()

+ }

+ wallets = append(wallets, raw)

+ }

+ return wallets

+}

+

+// OpenWallet initiates a hardware wallet opening procedure, establishing a USB

+// connection and attempting to authenticate via the provided passphrase. Note,

+// the method may return an extra challenge requiring a second open (e.g. the

+// Trezor PIN matrix challenge).

+func (s *PrivateAccountAPI) OpenWallet(url string, passphrase *string) error {

+ wallet, err := s.am.Wallet(url)

+ if err != nil {

+ return err

+ }

+ pass := ""

+ if passphrase != nil {

+ pass = *passphrase

+ }

+ return wallet.Open(pass)

+}

+

+// DeriveAccount requests a HD wallet to derive a new account, optionally pinning

+// it for later reuse.

+func (s *PrivateAccountAPI) DeriveAccount(url string, path string, pin *bool) (accounts.Account, error) {

+ wallet, err := s.am.Wallet(url)

+ if err != nil {

+ return accounts.Account{}, err

+ }

+ derivPath, err := accounts.ParseDerivationPath(path)

+ if err != nil {

+ return accounts.Account{}, err

+ }

+ if pin == nil {

+ pin = new(bool)

+ }

+ return wallet.Derive(derivPath, *pin)

+}

+

+// 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 := fetchKeystore(s.am).NewAccount(password)

+ if err == nil {

+ log.Info("Your new key was generated", "address", acc.Address)

+ log.Warn("Please backup your key file!", "path", acc.URL.Path)

+ log.Warn("Please remember your password!")

+ return acc.Address, nil

+ }

+ return common.Address{}, err

+}

+

+// fetchKeystore retrives the encrypted keystore from the account manager.

+func fetchKeystore(am *accounts.Manager) *keystore.KeyStore {

+ return am.Backends(keystore.KeyStoreType)[0].(*keystore.KeyStore)

+}

+

+// 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) {

+ key, err := crypto.HexToECDSA(privkey)

+ if err != nil {

+ return common.Address{}, err

+ }

+ acc, err := fetchKeystore(s.am).ImportECDSA(key, 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(ctx context.Context, addr common.Address, password string, duration *uint64) (bool, error) {

+ // When the API is exposed by external RPC(http, ws etc), unless the user

+ // explicitly specifies to allow the insecure account unlocking, otherwise

+ // it is disabled.

+ if s.b.ExtRPCEnabled() && !s.b.AccountManager().Config().InsecureUnlockAllowed {

+ return false, errors.New("account unlock with HTTP access is forbidden")

+ }

+

+ const max = uint64(time.Duration(math.MaxInt64) / time.Second)

+ var d time.Duration

+ if duration == nil {

+ d = 300 * time.Second

+ } else if *duration > max {

+ return false, errors.New("unlock duration too large")

+ } else {

+ d = time.Duration(*duration) * time.Second

+ }

+ err := fetchKeystore(s.am).TimedUnlock(accounts.Account{Address: addr}, password, d)

+ if err != nil {

+ log.Warn("Failed account unlock attempt", "address", addr, "err", err)

+ }

+ return err == nil, err

+}

+

+// LockAccount will lock the account associated with the given address when it's unlocked.

+func (s *PrivateAccountAPI) LockAccount(addr common.Address) bool {

+ return fetchKeystore(s.am).Lock(addr) == nil

+}

+

+// signTransaction sets defaults and signs the given transaction

+// NOTE: the caller needs to ensure that the nonceLock is held, if applicable,

+// and release it after the transaction has been submitted to the tx pool

+func (s *PrivateAccountAPI) signTransaction(ctx context.Context, args *SendTxArgs, passwd string) (*types.Transaction, error) {

+ // Look up the wallet containing the requested signer

+ account := accounts.Account{Address: args.From}

+ wallet, err := s.am.Find(account)

+ if err != nil {

+ return nil, err

+ }

+ // Set some sanity defaults and terminate on failure

+ if err := args.setDefaults(ctx, s.b); err != nil {

+ return nil, err

+ }

+ // Assemble the transaction and sign with the wallet

+ tx := args.toTransaction()

+

+ return wallet.SignTxWithPassphrase(account, passwd, tx, s.b.ChainConfig().ChainID)

+}

+

+// 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) {

+ if args.Nonce == nil {

+ // Hold the addresse's mutex around signing to prevent concurrent assignment of

+ // the same nonce to multiple accounts.

+ s.nonceLock.LockAddr(args.From)

+ defer s.nonceLock.UnlockAddr(args.From)

+ }

+ signed, err := s.signTransaction(ctx, &args, passwd)

+ if err != nil {

+ log.Warn("Failed transaction send attempt", "from", args.From, "to", args.To, "value", args.Value.ToInt(), "err", err)

+ return common.Hash{}, err

+ }

+ return SubmitTransaction(ctx, s.b, signed)

+}

+

+// SignTransaction 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. The transaction is returned in RLP-form, not broadcast

+// to other nodes

+func (s *PrivateAccountAPI) SignTransaction(ctx context.Context, args SendTxArgs, passwd string) (*SignTransactionResult, error) {

+ // No need to obtain the noncelock mutex, since we won't be sending this

+ // tx into the transaction pool, but right back to the user

+ if args.Gas == nil {

+ return nil, fmt.Errorf("gas not specified")

+ }

+ if args.GasPrice == nil {

+ return nil, fmt.Errorf("gasPrice not specified")

+ }

+ if args.Nonce == nil {

+ return nil, fmt.Errorf("nonce not specified")

+ }

+ signed, err := s.signTransaction(ctx, &args, passwd)

+ if err != nil {

+ log.Warn("Failed transaction sign attempt", "from", args.From, "to", args.To, "value", args.Value.ToInt(), "err", err)

+ return nil, err

+ }

+ data, err := rlp.EncodeToBytes(signed)

+ if err != nil {

+ return nil, err

+ }

+ return &SignTransactionResult{data, signed}, nil

+}

+

+// Sign calculates an Ethereum ECDSA signature for:

+// keccack256("\x19Ethereum Signed Message:\n" + len(message) + message))

+//

+// Note, the produced signature conforms to the secp256k1 curve R, S and V values,

+// where the V value will be 27 or 28 for legacy reasons.

+//

+// The key used to calculate the signature is decrypted with the given password.

+//

+// https://github.com/ethereum/go-ethereum/wiki/Management-APIs#personal_sign

+func (s *PrivateAccountAPI) Sign(ctx context.Context, data hexutil.Bytes, addr common.Address, passwd string) (hexutil.Bytes, error) {

+ // Look up the wallet containing the requested signer

+ account := accounts.Account{Address: addr}

+

+ wallet, err := s.b.AccountManager().Find(account)

+ if err != nil {

+ return nil, err

+ }

+ // Assemble sign the data with the wallet

+ signature, err := wallet.SignTextWithPassphrase(account, passwd, data)

+ if err != nil {

+ log.Warn("Failed data sign attempt", "address", addr, "err", err)

+ return nil, err

+ }

+ signature[64] += 27 // Transform V from 0/1 to 27/28 according to the yellow paper

+ return signature, nil

+}

+

+// EcRecover returns the address for the account that was used to create the signature.

+// Note, this function is compatible with eth_sign and personal_sign. As such it recovers

+// the address of:

+// hash = keccak256("\x19Ethereum Signed Message:\n"${message length}${message})

+// addr = ecrecover(hash, signature)

+//

+// Note, the signature must conform to the secp256k1 curve R, S and V values, where

+// the V value must be 27 or 28 for legacy reasons.

+//

+// https://github.com/ethereum/go-ethereum/wiki/Management-APIs#personal_ecRecover

+func (s *PrivateAccountAPI) EcRecover(ctx context.Context, data, sig hexutil.Bytes) (common.Address, error) {

+ if len(sig) != 65 {

+ return common.Address{}, fmt.Errorf("signature must be 65 bytes long")

+ }

+ if sig[64] != 27 && sig[64] != 28 {

+ return common.Address{}, fmt.Errorf("invalid Ethereum signature (V is not 27 or 28)")

+ }

+ sig[64] -= 27 // Transform yellow paper V from 27/28 to 0/1

+

+ rpk, err := crypto.SigToPub(accounts.TextHash(data), sig)

+ if err != nil {

+ return common.Address{}, err

+ }

+ return crypto.PubkeyToAddress(*rpk), nil

+}

+

+// 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)

+}

+

+// InitializeWallet initializes a new wallet at the provided URL, by generating and returning a new private key.

+func (s *PrivateAccountAPI) InitializeWallet(ctx context.Context, url string) (string, error) {

+ wallet, err := s.am.Wallet(url)

+ if err != nil {

+ return "", err

+ }

+

+ entropy, err := bip39.NewEntropy(256)

+ if err != nil {

+ return "", err

+ }

+

+ mnemonic, err := bip39.NewMnemonic(entropy)

+ if err != nil {

+ return "", err

+ }

+

+ seed := bip39.NewSeed(mnemonic, "")

+

+ switch wallet := wallet.(type) {

+ case *scwallet.Wallet:

+ return mnemonic, wallet.Initialize(seed)

+ default:

+ return "", fmt.Errorf("Specified wallet does not support initialization")

+ }

+}

+

+// Unpair deletes a pairing between wallet and geth.

+func (s *PrivateAccountAPI) Unpair(ctx context.Context, url string, pin string) error {

+ wallet, err := s.am.Wallet(url)

+ if err != nil {

+ return err

+ }

+

+ switch wallet := wallet.(type) {

+ case *scwallet.Wallet:

+ return wallet.Unpair([]byte(pin))

+ default:

+ return fmt.Errorf("Specified wallet does not support pairing")

+ }

+}

+

+// 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 Ethereum blockchain API.

+func NewPublicBlockChainAPI(b Backend) *PublicBlockChainAPI {

+ return &PublicBlockChainAPI{b}

+}

+

+// ChainId returns the chainID value for transaction replay protection.

+func (s *PublicBlockChainAPI) ChainId() *hexutil.Big {

+ return (*hexutil.Big)(s.b.ChainConfig().ChainID)

+}

+

+// BlockNumber returns the block number of the chain head.

+func (s *PublicBlockChainAPI) BlockNumber() hexutil.Uint64 {

+ header, _ := s.b.HeaderByNumber(context.Background(), rpc.LatestBlockNumber) // latest header should always be available

+ return hexutil.Uint64(header.Number.Uint64())

+}

+

+// 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) (*hexutil.Big, error) {

+ state, _, err := s.b.StateAndHeaderByNumber(ctx, blockNr)

+ if state == nil || err != nil {

+ return nil, err

+ }

+ return (*hexutil.Big)(state.GetBalance(address)), state.Error()

+}

+

+// Result structs for GetProof

+type AccountResult struct {

+ Address common.Address `json:"address"`

+ AccountProof []string `json:"accountProof"`

+ Balance *hexutil.Big `json:"balance"`

+ CodeHash common.Hash `json:"codeHash"`

+ Nonce hexutil.Uint64 `json:"nonce"`

+ StorageHash common.Hash `json:"storageHash"`

+ StorageProof []StorageResult `json:"storageProof"`

+}

+type StorageResult struct {

+ Key string `json:"key"`

+ Value *hexutil.Big `json:"value"`

+ Proof []string `json:"proof"`

+}

+

+// GetProof returns the Merkle-proof for a given account and optionally some storage keys.

+func (s *PublicBlockChainAPI) GetProof(ctx context.Context, address common.Address, storageKeys []string, blockNr rpc.BlockNumber) (*AccountResult, error) {

+ state, _, err := s.b.StateAndHeaderByNumber(ctx, blockNr)

+ if state == nil || err != nil {

+ return nil, err

+ }

+

+ storageTrie := state.StorageTrie(address)

+ storageHash := types.EmptyRootHash

+ codeHash := state.GetCodeHash(address)

+ storageProof := make([]StorageResult, len(storageKeys))

+

+ // if we have a storageTrie, (which means the account exists), we can update the storagehash

+ if storageTrie != nil {

+ storageHash = storageTrie.Hash()

+ } else {

+ // no storageTrie means the account does not exist, so the codeHash is the hash of an empty bytearray.

+ codeHash = crypto.Keccak256Hash(nil)

+ }

+

+ // create the proof for the storageKeys

+ for i, key := range storageKeys {

+ if storageTrie != nil {

+ proof, storageError := state.GetStorageProof(address, common.HexToHash(key))

+ if storageError != nil {

+ return nil, storageError

+ }

+ storageProof[i] = StorageResult{key, (*hexutil.Big)(state.GetState(address, common.HexToHash(key)).Big()), common.ToHexArray(proof)}

+ } else {

+ storageProof[i] = StorageResult{key, &hexutil.Big{}, []string{}}

+ }

+ }

+

+ // create the accountProof

+ accountProof, proofErr := state.GetProof(address)

+ if proofErr != nil {

+ return nil, proofErr

+ }

+

+ return &AccountResult{

+ Address: address,

+ AccountProof: common.ToHexArray(accountProof),

+ Balance: (*hexutil.Big)(state.GetBalance(address)),

+ CodeHash: codeHash,

+ Nonce: hexutil.Uint64(state.GetNonce(address)),

+ StorageHash: storageHash,

+ StorageProof: storageProof,

+ }, state.Error()

+}

+

+// GetHeaderByNumber returns the requested canonical block header.

+// * When blockNr is -1 the chain head is returned.

+// * When blockNr is -2 the pending chain head is returned.

+func (s *PublicBlockChainAPI) GetHeaderByNumber(ctx context.Context, number rpc.BlockNumber) (map[string]interface{}, error) {

+ header, err := s.b.HeaderByNumber(ctx, number)

+ if header != nil && err == nil {

+ response := s.rpcMarshalHeader(header)

+ if number == rpc.PendingBlockNumber {

+ // Pending header need to nil out a few fields

+ for _, field := range []string{"hash", "nonce", "miner"} {

+ response[field] = nil

+ }

+ }

+ return response, err

+ }

+ return nil, err

+}

+

+// GetHeaderByHash returns the requested header by hash.

+func (s *PublicBlockChainAPI) GetHeaderByHash(ctx context.Context, hash common.Hash) map[string]interface{} {

+ header, _ := s.b.HeaderByHash(ctx, hash)

+ if header != nil {

+ return s.rpcMarshalHeader(header)

+ }

+ return nil

+}

+

+// GetBlockByNumber returns the requested canonical block.

+// * When blockNr is -1 the chain head is returned.

+// * When blockNr is -2 the pending chain head is returned.

+// * When fullTx is true all transactions in the block are returned, otherwise

+// only the transaction hash is returned.

+func (s *PublicBlockChainAPI) GetBlockByNumber(ctx context.Context, number rpc.BlockNumber, fullTx bool) (map[string]interface{}, error) {

+ block, err := s.b.BlockByNumber(ctx, number)

+ if block != nil && err == nil {

+ response, err := s.rpcMarshalBlock(block, true, fullTx)

+ if err == nil && number == rpc.PendingBlockNumber {

+ // Pending blocks need to nil out a few fields

+ for _, field := range []string{"hash", "nonce", "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, hash common.Hash, fullTx bool) (map[string]interface{}, error) {

+ block, err := s.b.BlockByHash(ctx, hash)

+ if block != nil {

+ return s.rpcMarshalBlock(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 hexutil.Uint) (map[string]interface{}, error) {

+ block, err := s.b.BlockByNumber(ctx, blockNr)

+ if block != nil {

+ uncles := block.Uncles()

+ if index >= hexutil.Uint(len(uncles)) {

+ log.Debug("Requested uncle not found", "number", blockNr, "hash", block.Hash(), "index", index)

+ return nil, nil

+ }

+ block = types.NewBlockWithHeader(uncles[index])

+ return s.rpcMarshalBlock(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 hexutil.Uint) (map[string]interface{}, error) {

+ block, err := s.b.BlockByHash(ctx, blockHash)

+ if block != nil {

+ uncles := block.Uncles()

+ if index >= hexutil.Uint(len(uncles)) {

+ log.Debug("Requested uncle not found", "number", block.Number(), "hash", blockHash, "index", index)

+ return nil, nil

+ }

+ block = types.NewBlockWithHeader(uncles[index])

+ return s.rpcMarshalBlock(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) *hexutil.Uint {

+ if block, _ := s.b.BlockByNumber(ctx, blockNr); block != nil {

+ n := hexutil.Uint(len(block.Uncles()))

+ return &n

+ }

+ 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) *hexutil.Uint {

+ if block, _ := s.b.BlockByHash(ctx, blockHash); block != nil {

+ n := hexutil.Uint(len(block.Uncles()))

+ return &n

+ }

+ 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) (hexutil.Bytes, error) {

+ state, _, err := s.b.StateAndHeaderByNumber(ctx, blockNr)

+ if state == nil || err != nil {

+ return nil, err

+ }

+ code := state.GetCode(address)

+ return code, state.Error()

+}

+

+// 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) (hexutil.Bytes, error) {

+ state, _, err := s.b.StateAndHeaderByNumber(ctx, blockNr)

+ if state == nil || err != nil {

+ return nil, err

+ }

+ res := state.GetState(address, common.HexToHash(key))

+ return res[:], state.Error()

+}

+

+// CallArgs represents the arguments for a call.

+type CallArgs struct {

+ From *common.Address `json:"from"`

+ To *common.Address `json:"to"`

+ Gas *hexutil.Uint64 `json:"gas"`

+ GasPrice *hexutil.Big `json:"gasPrice"`

+ Value *hexutil.Big `json:"value"`

+ Data *hexutil.Bytes `json:"data"`

+}

+

+// 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"`

+}

+

+func DoCall(ctx context.Context, b Backend, args CallArgs, blockNr rpc.BlockNumber, overrides map[common.Address]account, vmCfg vm.Config, timeout time.Duration, globalGasCap *big.Int) ([]byte, uint64, bool, error) {

+ defer func(start time.Time) { log.Debug("Executing EVM call finished", "runtime", time.Since(start)) }(time.Now())

+

+ state, header, err := b.StateAndHeaderByNumber(ctx, blockNr)

+ if state == nil || err != nil {

+ return nil, 0, false, err

+ }

+ // Set sender address or use a default if none specified

+ var addr common.Address

+ if args.From == nil {

+ if wallets := b.AccountManager().Wallets(); len(wallets) > 0 {

+ if accounts := wallets[0].Accounts(); len(accounts) > 0 {

+ addr = accounts[0].Address

+ }

+ }

+ } else {

+ addr = *args.From

+ }

+ // Override the fields of specified contracts before execution.

+ for addr, account := range overrides {

+ // Override account nonce.

+ if account.Nonce != nil {

+ state.SetNonce(addr, uint64(*account.Nonce))

+ }

+ // Override account(contract) code.

+ if account.Code != nil {

+ state.SetCode(addr, *account.Code)

+ }

+ // Override account balance.

+ if account.Balance != nil {

+ 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())

+ }

+ // Replace entire state if caller requires.

+ if account.State != nil {

+ state.SetStorage(addr, *account.State)

+ }

+ // Apply state diff into specified accounts.

+ if account.StateDiff != nil {

+ for key, value := range *account.StateDiff {

+ state.SetState(addr, key, value)

+ }

+ }

+ }

+ // Set default gas & gas price if none were set

+ gas := uint64(math.MaxUint64 / 2)

+ if args.Gas != nil {

+ gas = uint64(*args.Gas)

+ }

+ if globalGasCap != nil && globalGasCap.Uint64() < gas {

+ log.Warn("Caller gas above allowance, capping", "requested", gas, "cap", globalGasCap)

+ gas = globalGasCap.Uint64()

+ }

+ gasPrice := new(big.Int).SetUint64(defaultGasPrice)

+ if args.GasPrice != nil {

+ gasPrice = args.GasPrice.ToInt()

+ }

+

+ value := new(big.Int)

+ if args.Value != nil {

+ value = args.Value.ToInt()

+ }

+

+ var data []byte

+ if args.Data != nil {

+ data = []byte(*args.Data)

+ }

+

+ // Create new call message

+ msg := types.NewMessage(addr, args.To, 0, value, gas, gasPrice, data, false)

+

+ // Setup context so it may be cancelled the call has completed

+ // or, in case of unmetered gas, setup a context with a timeout.

+ var cancel context.CancelFunc

+ if timeout > 0 {

+ ctx, cancel = context.WithTimeout(ctx, timeout)

+ } else {

+ ctx, cancel = context.WithCancel(ctx)

+ }

+ // Make sure the context is cancelled when the call has completed

+ // this makes sure resources are cleaned up.

+ defer cancel()

+

+ // Get a new instance of the EVM.

+ evm, vmError, err := b.GetEVM(ctx, msg, state, header)

+ if err != nil {

+ return nil, 0, false, 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() {

+ <-ctx.Done()

+ evm.Cancel()

+ }()

+

+ // Setup the gas pool (also for unmetered requests)

+ // and apply the message.

+ gp := new(core.GasPool).AddGas(math.MaxUint64)

+ res, gas, failed, err := core.ApplyMessage(evm, msg, gp)

+ if err := vmError(); err != nil {

+ return nil, 0, false, 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 res, gas, failed, err

+}

+

+// 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 (s *PublicBlockChainAPI) Call(ctx context.Context, args CallArgs, blockNr rpc.BlockNumber, overrides *map[common.Address]account) (hexutil.Bytes, error) {

+ var accounts map[common.Address]account

+ if overrides != nil {

+ accounts = *overrides

+ }

+ result, _, _, err := DoCall(ctx, s.b, args, blockNr, accounts, vm.Config{}, 5*time.Second, s.b.RPCGasCap())

+ return (hexutil.Bytes)(result), err

+}

+

+func DoEstimateGas(ctx context.Context, b Backend, args CallArgs, blockNr rpc.BlockNumber, gasCap *big.Int) (hexutil.Uint64, error) {

+ // Binary search the gas requirement, as it may be higher than the amount used

+ var (

+ lo uint64 = params.TxGas - 1

+ hi uint64

+ cap uint64

+ )

+ if args.Gas != nil && uint64(*args.Gas) >= params.TxGas {

+ hi = uint64(*args.Gas)

+ } else {

+ // Retrieve the block to act as the gas ceiling

+ block, err := b.BlockByNumber(ctx, blockNr)

+ if err != nil {

+ return 0, err

+ }

+ hi = block.GasLimit()

+ }

+ if gasCap != nil && hi > gasCap.Uint64() {

+ log.Warn("Caller gas above allowance, capping", "requested", hi, "cap", gasCap)

+ hi = gasCap.Uint64()

+ }

+ cap = hi

+

+ // Create a helper to check if a gas allowance results in an executable transaction

+ executable := func(gas uint64) bool {

+ args.Gas = (*hexutil.Uint64)(&gas)

+

+ _, _, failed, err := DoCall(ctx, b, args, rpc.PendingBlockNumber, nil, vm.Config{}, 0, gasCap)

+ if err != nil || failed {

+ return false

+ }

+ return true

+ }

+ // Execute the binary search and hone in on an executable gas limit

+ for lo+1 < hi {

+ mid := (hi + lo) / 2

+ if !executable(mid) {

+ lo = mid

+ } else {

+ hi = mid

+ }

+ }

+ // Reject the transaction as invalid if it still fails at the highest allowance

+ if hi == cap {

+ if !executable(hi) {

+ return 0, fmt.Errorf("gas required exceeds allowance (%d) or always failing transaction", cap)

+ }

+ }

+ return hexutil.Uint64(hi), nil

+}

+

+// EstimateGas returns an estimate of the amount of gas needed to execute the

+// given transaction against the current pending block.

+func (s *PublicBlockChainAPI) EstimateGas(ctx context.Context, args CallArgs) (hexutil.Uint64, error) {

+ return DoEstimateGas(ctx, s.b, args, rpc.PendingBlockNumber, s.b.RPCGasCap())

+}

+

+// ExecutionResult groups all structured logs emitted by the EVM

+// while replaying a transaction in debug mode as well as transaction

+// execution status, the amount of gas used and the return value

+type ExecutionResult struct {

+ Gas uint64 `json:"gas"`

+ Failed bool `json:"failed"`

+ 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 uint64 `json:"gas"`

+ GasCost uint64 `json:"gasCost"`

+ Depth int `json:"depth"`

+ Error error `json:"error,omitempty"`

+ Stack *[]string `json:"stack,omitempty"`

+ Memory *[]string `json:"memory,omitempty"`

+ Storage *map[string]string `json:"storage,omitempty"`

+}

+

+// FormatLogs formats EVM returned structured logs for json output

+func FormatLogs(logs []vm.StructLog) []StructLogRes {

+ formatted := make([]StructLogRes, len(logs))

+ for index, trace := range logs {

+ formatted[index] = StructLogRes{

+ Pc: trace.Pc,

+ Op: trace.Op.String(),

+ Gas: trace.Gas,

+ GasCost: trace.GasCost,

+ Depth: trace.Depth,

+ Error: trace.Err,

+ }

+ if trace.Stack != nil {

+ stack := make([]string, len(trace.Stack))

+ for i, stackValue := range trace.Stack {

+ stack[i] = fmt.Sprintf("%x", math.PaddedBigBytes(stackValue, 32))

+ }

+ formatted[index].Stack = &stack

+ }

+ if trace.Memory != nil {

+ memory := make([]string, 0, (len(trace.Memory)+31)/32)

+ for i := 0; i+32 <= len(trace.Memory); i += 32 {

+ memory = append(memory, fmt.Sprintf("%x", trace.Memory[i:i+32]))

+ }

+ formatted[index].Memory = &memory

+ }

+ if trace.Storage != nil {

+ storage := make(map[string]string)

+ for i, storageValue := range trace.Storage {

+ storage[fmt.Sprintf("%x", i)] = fmt.Sprintf("%x", storageValue)

+ }

+ formatted[index].Storage = &storage

+ }

+ }

+ return formatted

+}

+

+// RPCMarshalHeader converts the given header to the RPC output .

+func RPCMarshalHeader(head *types.Header) map[string]interface{} {

+ return map[string]interface{}{

+ "number": (*hexutil.Big)(head.Number),

+ "hash": head.Hash(),

+ "parentHash": head.ParentHash,

+ "nonce": head.Nonce,

+ "mixHash": head.MixDigest,

+ "sha3Uncles": head.UncleHash,

+ "logsBloom": head.Bloom,

+ "stateRoot": head.Root,

+ "miner": head.Coinbase,

+ "difficulty": (*hexutil.Big)(head.Difficulty),

+ "extraData": hexutil.Bytes(head.Extra),

+ "size": hexutil.Uint64(head.Size()),

+ "gasLimit": hexutil.Uint64(head.GasLimit),

+ "gasUsed": hexutil.Uint64(head.GasUsed),

+ "timestamp": hexutil.Uint64(head.Time),

+ "transactionsRoot": head.TxHash,

+ "receiptsRoot": head.ReceiptHash,

+ }

+}

+

+// RPCMarshalBlock 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 RPCMarshalBlock(block *types.Block, inclTx bool, fullTx bool) (map[string]interface{}, error) {

+ fields := RPCMarshalHeader(block.Header())

+ fields["size"] = hexutil.Uint64(block.Size())

+

+ if inclTx {

+ formatTx := func(tx *types.Transaction) (interface{}, error) {

+ return tx.Hash(), nil

+ }

+ if fullTx {

+ formatTx = func(tx *types.Transaction) (interface{}, error) {

+ return newRPCTransactionFromBlockHash(block, tx.Hash()), nil

+ }

+ }

+ txs := block.Transactions()

+ transactions := make([]interface{}, len(txs))

+ var err error

+ for i, tx := range txs {

+ if transactions[i], err = formatTx(tx); err != nil {

+ return nil, err

+ }

+ }

+ fields["transactions"] = transactions

+ }

+ uncles := block.Uncles()

+ uncleHashes := make([]common.Hash, len(uncles))

+ for i, uncle := range uncles {

+ uncleHashes[i] = uncle.Hash()

+ }

+ fields["uncles"] = uncleHashes

+

+ return fields, nil

+}

+

+// rpcMarshalHeader uses the generalized output filler, then adds the total difficulty field, which requires

+// a `PublicBlockchainAPI`.

+func (s *PublicBlockChainAPI) rpcMarshalHeader(header *types.Header) map[string]interface{} {

+ fields := RPCMarshalHeader(header)

+ fields["totalDifficulty"] = (*hexutil.Big)(s.b.GetTd(header.Hash()))

+ return fields

+}

+

+// rpcMarshalBlock uses the generalized output filler, then adds the total difficulty field, which requires

+// a `PublicBlockchainAPI`.

+func (s *PublicBlockChainAPI) rpcMarshalBlock(b *types.Block, inclTx bool, fullTx bool) (map[string]interface{}, error) {

+ fields, err := RPCMarshalBlock(b, inclTx, fullTx)

+ if err != nil {

+ return nil, err

+ }

+ fields["totalDifficulty"] = (*hexutil.Big)(s.b.GetTd(b.Hash()))

+ return fields, err

+}

+

+// RPCTransaction represents a transaction that will serialize to the RPC representation of a transaction

+type RPCTransaction struct {

+ BlockHash *common.Hash `json:"blockHash"`

+ BlockNumber *hexutil.Big `json:"blockNumber"`

+ From common.Address `json:"from"`

+ Gas hexutil.Uint64 `json:"gas"`

+ GasPrice *hexutil.Big `json:"gasPrice"`

+ Hash common.Hash `json:"hash"`

+ Input hexutil.Bytes `json:"input"`

+ Nonce hexutil.Uint64 `json:"nonce"`

+ To *common.Address `json:"to"`

+ TransactionIndex *hexutil.Uint64 `json:"transactionIndex"`

+ Value *hexutil.Big `json:"value"`

+ V *hexutil.Big `json:"v"`

+ R *hexutil.Big `json:"r"`

+ S *hexutil.Big `json:"s"`

+}

+

+// newRPCTransaction returns a transaction that will serialize to the RPC

+// representation, with the given location metadata set (if available).

+func newRPCTransaction(tx *types.Transaction, blockHash common.Hash, blockNumber uint64, index uint64) *RPCTransaction {

+ var signer types.Signer = types.FrontierSigner{}

+ if tx.Protected() {

+ signer = types.NewEIP155Signer(tx.ChainId())

+ }

+ from, _ := types.Sender(signer, tx)

+ v, r, s := tx.RawSignatureValues()

+

+ result := &RPCTransaction{

+ From: from,

+ Gas: hexutil.Uint64(tx.Gas()),

+ GasPrice: (*hexutil.Big)(tx.GasPrice()),

+ Hash: tx.Hash(),

+ Input: hexutil.Bytes(tx.Data()),

+ Nonce: hexutil.Uint64(tx.Nonce()),

+ To: tx.To(),

+ Value: (*hexutil.Big)(tx.Value()),

+ V: (*hexutil.Big)(v),

+ R: (*hexutil.Big)(r),

+ S: (*hexutil.Big)(s),

+ }

+ if blockHash != (common.Hash{}) {

+ result.BlockHash = &blockHash

+ result.BlockNumber = (*hexutil.Big)(new(big.Int).SetUint64(blockNumber))

+ result.TransactionIndex = (*hexutil.Uint64)(&index)

+ }

+ return result

+}

+

+// newRPCPendingTransaction returns a pending transaction that will serialize to the RPC representation

+func newRPCPendingTransaction(tx *types.Transaction) *RPCTransaction {

+ return newRPCTransaction(tx, common.Hash{}, 0, 0)

+}

+

+// newRPCTransactionFromBlockIndex returns a transaction that will serialize to the RPC representation.

+func newRPCTransactionFromBlockIndex(b *types.Block, index uint64) *RPCTransaction {

+ txs := b.Transactions()

+ if index >= uint64(len(txs)) {

+ return nil

+ }

+ return newRPCTransaction(txs[index], b.Hash(), b.NumberU64(), index)

+}

+

+// newRPCRawTransactionFromBlockIndex returns the bytes of a transaction given a block and a transaction index.

+func newRPCRawTransactionFromBlockIndex(b *types.Block, index uint64) hexutil.Bytes {

+ txs := b.Transactions()

+ if index >= uint64(len(txs)) {

+ return nil

+ }

+ blob, _ := rlp.EncodeToBytes(txs[index])

+ return blob

+}

+

+// newRPCTransactionFromBlockHash returns a transaction that will serialize to the RPC representation.

+func newRPCTransactionFromBlockHash(b *types.Block, hash common.Hash) *RPCTransaction {

+ for idx, tx := range b.Transactions() {

+ if tx.Hash() == hash {

+ return newRPCTransactionFromBlockIndex(b, uint64(idx))

+ }

+ }

+ return nil

+}

+

+// PublicTransactionPoolAPI exposes methods for the RPC interface

+type PublicTransactionPoolAPI struct {

+ b Backend

+ nonceLock *AddrLocker

+}

+

+// NewPublicTransactionPoolAPI creates a new RPC service with methods specific for the transaction pool.

+func NewPublicTransactionPoolAPI(b Backend, nonceLock *AddrLocker) *PublicTransactionPoolAPI {

+ return &PublicTransactionPoolAPI{b, nonceLock}

+}

+

+// GetBlockTransactionCountByNumber returns the number of transactions in the block with the given block number.

+func (s *PublicTransactionPoolAPI) GetBlockTransactionCountByNumber(ctx context.Context, blockNr rpc.BlockNumber) *hexutil.Uint {

+ if block, _ := s.b.BlockByNumber(ctx, blockNr); block != nil {

+ n := hexutil.Uint(len(block.Transactions()))

+ return &n

+ }

+ 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) *hexutil.Uint {

+ if block, _ := s.b.BlockByHash(ctx, blockHash); block != nil {

+ n := hexutil.Uint(len(block.Transactions()))

+ return &n

+ }

+ return nil

+}

+

+// GetTransactionByBlockNumberAndIndex returns the transaction for the given block number and index.

+func (s *PublicTransactionPoolAPI) GetTransactionByBlockNumberAndIndex(ctx context.Context, blockNr rpc.BlockNumber, index hexutil.Uint) *RPCTransaction {

+ if block, _ := s.b.BlockByNumber(ctx, blockNr); block != nil {

+ return newRPCTransactionFromBlockIndex(block, uint64(index))

+ }

+ return nil

+}

+

+// GetTransactionByBlockHashAndIndex returns the transaction for the given block hash and index.

+func (s *PublicTransactionPoolAPI) GetTransactionByBlockHashAndIndex(ctx context.Context, blockHash common.Hash, index hexutil.Uint) *RPCTransaction {

+ if block, _ := s.b.BlockByHash(ctx, blockHash); block != nil {

+ return newRPCTransactionFromBlockIndex(block, uint64(index))

+ }

+ return nil

+}

+

+// GetRawTransactionByBlockNumberAndIndex returns the bytes of the transaction for the given block number and index.

+func (s *PublicTransactionPoolAPI) GetRawTransactionByBlockNumberAndIndex(ctx context.Context, blockNr rpc.BlockNumber, index hexutil.Uint) hexutil.Bytes {

+ if block, _ := s.b.BlockByNumber(ctx, blockNr); block != nil {

+ return newRPCRawTransactionFromBlockIndex(block, uint64(index))

+ }

+ return nil

+}

+

+// GetRawTransactionByBlockHashAndIndex returns the bytes of the transaction for the given block hash and index.

+func (s *PublicTransactionPoolAPI) GetRawTransactionByBlockHashAndIndex(ctx context.Context, blockHash common.Hash, index hexutil.Uint) hexutil.Bytes {

+ if block, _ := s.b.BlockByHash(ctx, blockHash); block != nil {

+ return newRPCRawTransactionFromBlockIndex(block, uint64(index))

+ }

+ return 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) (*hexutil.Uint64, error) {

+ // Ask transaction pool for the nonce which includes pending transactions

+ if blockNr == rpc.PendingBlockNumber {

+ nonce, err := s.b.GetPoolNonce(ctx, address)

+ if err != nil {

+ return nil, err

+ }

+ return (*hexutil.Uint64)(&nonce), nil

+ }

+ // Resolve block number and use its state to ask for the nonce

+ state, _, err := s.b.StateAndHeaderByNumber(ctx, blockNr)

+ if state == nil || err != nil {

+ return nil, err

+ }

+ nonce := state.GetNonce(address)

+ return (*hexutil.Uint64)(&nonce), state.Error()

+}

+

+// GetTransactionByHash returns the transaction for the given hash

+func (s *PublicTransactionPoolAPI) GetTransactionByHash(ctx context.Context, hash common.Hash) (*RPCTransaction, error) {

+ // Try to return an already finalized transaction

+ tx, blockHash, blockNumber, index, err := s.b.GetTransaction(ctx, hash)

+ if err != nil {

+ return nil, err

+ }

+ if tx != nil {

+ return newRPCTransaction(tx, blockHash, blockNumber, index), nil

+ }

+ // No finalized transaction, try to retrieve it from the pool

+ if tx := s.b.GetPoolTransaction(hash); tx != nil {

+ return newRPCPendingTransaction(tx), nil

+ }

+

+ // Transaction unknown, return as such

+ return nil, nil

+}

+

+// GetRawTransactionByHash returns the bytes of the transaction for the given hash.

+func (s *PublicTransactionPoolAPI) GetRawTransactionByHash(ctx context.Context, hash common.Hash) (hexutil.Bytes, error) {

+ // Retrieve a finalized transaction, or a pooled otherwise

+ tx, _, _, _, err := s.b.GetTransaction(ctx, hash)

+ if err != nil {

+ return nil, err

+ }

+ if tx == nil {

+ if tx = s.b.GetPoolTransaction(hash); tx == nil {

+ // Transaction not found anywhere, abort

+ return nil, nil

+ }

+ }

+ // Serialize to RLP and return

+ return rlp.EncodeToBytes(tx)

+}

+

+// GetTransactionReceipt returns the transaction receipt for the given transaction hash.

+func (s *PublicTransactionPoolAPI) GetTransactionReceipt(ctx context.Context, hash common.Hash) (map[string]interface{}, error) {

+ tx, blockHash, blockNumber, index := rawdb.ReadTransaction(s.b.ChainDb(), hash)

+ if tx == nil {

+ return nil, nil

+ }

+ receipts, err := s.b.GetReceipts(ctx, blockHash)

+ if err != nil {

+ return nil, err

+ }

+ if len(receipts) <= int(index) {

+ return nil, nil

+ }

+ receipt := receipts[index]

+

+ var signer types.Signer = types.FrontierSigner{}

+ if tx.Protected() {

+ signer = types.NewEIP155Signer(tx.ChainId())

+ }

+ from, _ := types.Sender(signer, tx)

+

+ fields := map[string]interface{}{

+ "blockHash": blockHash,

+ "blockNumber": hexutil.Uint64(blockNumber),

+ "transactionHash": hash,

+ "transactionIndex": hexutil.Uint64(index),

+ "from": from,

+ "to": tx.To(),

+ "gasUsed": hexutil.Uint64(receipt.GasUsed),

+ "cumulativeGasUsed": hexutil.Uint64(receipt.CumulativeGasUsed),

+ "contractAddress": nil,

+ "logs": receipt.Logs,

+ "logsBloom": receipt.Bloom,

+ }

+

+ // Assign receipt status or post state.

+ if len(receipt.PostState) > 0 {

+ fields["root"] = hexutil.Bytes(receipt.PostState)

+ } else {

+ fields["status"] = hexutil.Uint(receipt.Status)

+ }

+ if receipt.Logs == nil {

+ fields["logs"] = [][]*types.Log{}

+ }

+ // If the ContractAddress is 20 0x0 bytes, assume it is not a contract creation

+ if receipt.ContractAddress != (common.Address{}) {

+ 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) {

+ // Look up the wallet containing the requested signer

+ account := accounts.Account{Address: addr}

+

+ wallet, err := s.b.AccountManager().Find(account)

+ if err != nil {

+ return nil, err

+ }

+ // Request the wallet to sign the transaction

+ return wallet.SignTx(account, tx, s.b.ChainConfig().ChainID)

+}

+

+// 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 *hexutil.Uint64 `json:"gas"`

+ GasPrice *hexutil.Big `json:"gasPrice"`

+ Value *hexutil.Big `json:"value"`

+ Nonce *hexutil.Uint64 `json:"nonce"`

+ // We accept "data" and "input" for backwards-compatibility reasons. "input" is the

+ // newer name and should be preferred by clients.

+ Data *hexutil.Bytes `json:"data"`

+ Input *hexutil.Bytes `json:"input"`

+}

+

+// setDefaults is a helper function that fills in default values for unspecified tx fields.

+func (args *SendTxArgs) setDefaults(ctx context.Context, b Backend) error {

+ if args.GasPrice == nil {

+ price, err := b.SuggestPrice(ctx)

+ if err != nil {

+ return err

+ }

+ args.GasPrice = (*hexutil.Big)(price)

+ }

+ if args.Value == nil {

+ args.Value = new(hexutil.Big)

+ }

+ if args.Nonce == nil {

+ nonce, err := b.GetPoolNonce(ctx, args.From)

+ if err != nil {

+ return err

+ }

+ args.Nonce = (*hexutil.Uint64)(&nonce)

+ }

+ if args.Data != nil && args.Input != nil && !bytes.Equal(*args.Data, *args.Input) {

+ return errors.New(`Both "data" and "input" are set and not equal. Please use "input" to pass transaction call data.`)

+ }

+ if args.To == nil {

+ // Contract creation

+ var input []byte

+ if args.Data != nil {

+ input = *args.Data

+ } else if args.Input != nil {

+ input = *args.Input

+ }

+ if len(input) == 0 {

+ return errors.New(`contract creation without any data provided`)

+ }

+ }

+ // Estimate the gas usage if necessary.

+ if args.Gas == nil {

+ // For backwards-compatibility reason, we try both input and data

+ // but input is preferred.

+ input := args.Input

+ if input == nil {

+ input = args.Data

+ }

+ callArgs := CallArgs{

+ From: &args.From, // From shouldn't be nil

+ To: args.To,

+ GasPrice: args.GasPrice,

+ Value: args.Value,

+ Data: input,

+ }

+ estimated, err := DoEstimateGas(ctx, b, callArgs, rpc.PendingBlockNumber, b.RPCGasCap())

+ if err != nil {

+ return err

+ }

+ args.Gas = &estimated

+ log.Trace("Estimate gas usage automatically", "gas", args.Gas)

+ }

+ return nil

+}

+

+func (args *SendTxArgs) toTransaction() *types.Transaction {

+ var input []byte

+ if args.Input != nil {

+ input = *args.Input

+ } else if args.Data != nil {

+ input = *args.Data

+ }

+ if args.To == nil {

+ return types.NewContractCreation(uint64(*args.Nonce), (*big.Int)(args.Value), uint64(*args.Gas), (*big.Int)(args.GasPrice), input)

+ }

+ return types.NewTransaction(uint64(*args.Nonce), *args.To, (*big.Int)(args.Value), uint64(*args.Gas), (*big.Int)(args.GasPrice), input)

+}

+

+// SubmitTransaction is a helper function that submits tx to txPool and logs a message.

+func SubmitTransaction(ctx context.Context, b Backend, tx *types.Transaction) (common.Hash, error) {

+ if err := b.SendTx(ctx, tx); err != nil {

+ return common.Hash{}, err

+ }

+ if tx.To() == nil {

+ signer := types.MakeSigner(b.ChainConfig(), b.CurrentBlock().Number())

+ from, err := types.Sender(signer, tx)

+ if err != nil {

+ return common.Hash{}, err

+ }

+ addr := crypto.CreateAddress(from, tx.Nonce())

+ log.Info("Submitted contract creation", "fullhash", tx.Hash().Hex(), "contract", addr.Hex())

+ } else {

+ log.Info("Submitted transaction", "fullhash", tx.Hash().Hex(), "recipient", tx.To())

+ }

+ return tx.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) {

+ // Look up the wallet containing the requested signer

+ account := accounts.Account{Address: args.From}

+

+ wallet, err := s.b.AccountManager().Find(account)

+ if err != nil {

+ return common.Hash{}, err

+ }

+

+ if args.Nonce == nil {

+ // Hold the addresse's mutex around signing to prevent concurrent assignment of

+ // the same nonce to multiple accounts.

+ s.nonceLock.LockAddr(args.From)

+ defer s.nonceLock.UnlockAddr(args.From)

+ }

+

+ // Set some sanity defaults and terminate on failure

+ if err := args.setDefaults(ctx, s.b); err != nil {

+ return common.Hash{}, err

+ }

+ // Assemble the transaction and sign with the wallet

+ tx := args.toTransaction()

+

+ signed, err := wallet.SignTx(account, tx, s.b.ChainConfig().ChainID)

+ if err != nil {

+ return common.Hash{}, err

+ }

+ return SubmitTransaction(ctx, s.b, signed)

+}

+

+// 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 hexutil.Bytes) (common.Hash, error) {

+ tx := new(types.Transaction)

+ if err := rlp.DecodeBytes(encodedTx, tx); err != nil {

+ return common.Hash{}, err

+ }

+ return SubmitTransaction(ctx, s.b, tx)

+}

+

+// Sign calculates an ECDSA signature for:

+// keccack256("\x19Ethereum Signed Message:\n" + len(message) + message).

+//

+// Note, the produced signature conforms to the secp256k1 curve R, S and V values,

+// where the V value will be 27 or 28 for legacy reasons.

+//

+// The account associated with addr must be unlocked.

+//

+// https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign

+func (s *PublicTransactionPoolAPI) Sign(addr common.Address, data hexutil.Bytes) (hexutil.Bytes, error) {

+ // Look up the wallet containing the requested signer

+ account := accounts.Account{Address: addr}

+

+ wallet, err := s.b.AccountManager().Find(account)

+ if err != nil {

+ return nil, err

+ }

+ // Sign the requested hash with the wallet

+ signature, err := wallet.SignText(account, data)

+ if err == nil {

+ signature[64] += 27 // Transform V from 0/1 to 27/28 according to the yellow paper

+ }

+ return signature, err

+}

+

+// SignTransactionResult represents a RLP encoded signed transaction.

+type SignTransactionResult struct {

+ Raw hexutil.Bytes `json:"raw"`

+ Tx *types.Transaction `json:"tx"`

+}

+

+// 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 SendTxArgs) (*SignTransactionResult, error) {

+ if args.Gas == nil {

+ return nil, fmt.Errorf("gas not specified")

+ }

+ if args.GasPrice == nil {

+ return nil, fmt.Errorf("gasPrice not specified")

+ }

+ if args.Nonce == nil {

+ return nil, fmt.Errorf("nonce not specified")

+ }

+ if err := args.setDefaults(ctx, s.b); err != nil {

+ return nil, err

+ }

+ tx, err := s.sign(args.From, args.toTransaction())

+ if err != nil {

+ return nil, err

+ }

+ data, err := rlp.EncodeToBytes(tx)

+ if err != nil {

+ return nil, err

+ }

+ return &SignTransactionResult{data, tx}, 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, error) {

+ pending, err := s.b.GetPoolTransactions()

+ if err != nil {

+ return nil, err

+ }

+ accounts := make(map[common.Address]struct{})

+ for _, wallet := range s.b.AccountManager().Wallets() {

+ for _, account := range wallet.Accounts() {

+ accounts[account.Address] = struct{}{}

+ }

+ }

+ transactions := make([]*RPCTransaction, 0, len(pending))

+ for _, tx := range pending {

+ var signer types.Signer = types.HomesteadSigner{}

+ if tx.Protected() {

+ signer = types.NewEIP155Signer(tx.ChainId())

+ }

+ from, _ := types.Sender(signer, tx)

+ if _, exists := accounts[from]; exists {

+ transactions = append(transactions, newRPCPendingTransaction(tx))

+ }

+ }

+ return transactions, nil

+}

+

+// 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, sendArgs SendTxArgs, gasPrice *hexutil.Big, gasLimit *hexutil.Uint64) (common.Hash, error) {

+ if sendArgs.Nonce == nil {

+ return common.Hash{}, fmt.Errorf("missing transaction nonce in transaction spec")

+ }

+ if err := sendArgs.setDefaults(ctx, s.b); err != nil {

+ return common.Hash{}, err

+ }

+ matchTx := sendArgs.toTransaction()

+ pending, err := s.b.GetPoolTransactions()

+ if err != nil {

+ return common.Hash{}, err

+ }

+

+ for _, p := range pending {

+ var signer types.Signer = types.HomesteadSigner{}

+ if p.Protected() {

+ signer = types.NewEIP155Signer(p.ChainId())

+ }

+ wantSigHash := signer.Hash(matchTx)

+

+ if pFrom, err := types.Sender(signer, p); err == nil && pFrom == sendArgs.From && signer.Hash(p) == wantSigHash {

+ // Match. Re-sign and send the transaction.

+ if gasPrice != nil && (*big.Int)(gasPrice).Sign() != 0 {

+ sendArgs.GasPrice = gasPrice

+ }

+ if gasLimit != nil && *gasLimit != 0 {

+ sendArgs.Gas = gasLimit

+ }

+ signedTx, err := s.sign(sendArgs.From, sendArgs.toTransaction())

+ if err != nil {

+ return common.Hash{}, err

+ }

+ 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", matchTx.Hash())

+}

+

+// PublicDebugAPI is the collection of Ethereum 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

+}

+

+// TestSignCliqueBlock fetches the given block number, and attempts to sign it as a clique header with the

+// given address, returning the address of the recovered signature

+//

+// This is a temporary method to debug the externalsigner integration,

+// TODO: Remove this method when the integration is mature

+func (api *PublicDebugAPI) TestSignCliqueBlock(ctx context.Context, address common.Address, number uint64) (common.Address, error) {

+ block, _ := api.b.BlockByNumber(ctx, rpc.BlockNumber(number))

+ if block == nil {

+ return common.Address{}, fmt.Errorf("block #%d not found", number)

+ }

+ header := block.Header()

+ header.Extra = make([]byte, 32+65)

+ encoded := clique.CliqueRLP(header)

+

+ // Look up the wallet containing the requested signer

+ account := accounts.Account{Address: address}

+ wallet, err := api.b.AccountManager().Find(account)

+ if err != nil {

+ return common.Address{}, err

+ }

+

+ signature, err := wallet.SignData(account, accounts.MimetypeClique, encoded)

+ if err != nil {

+ return common.Address{}, err

+ }

+ sealHash := clique.SealHash(header).Bytes()

+ log.Info("test signing of clique block",

+ "Sealhash", fmt.Sprintf("%x", sealHash),

+ "signature", fmt.Sprintf("%x", signature))

+ pubkey, err := crypto.Ecrecover(sealHash, signature)

+ if err != nil {

+ return common.Address{}, err

+ }

+ var signer common.Address

+ copy(signer[:], crypto.Keccak256(pubkey[1:])[12:])

+

+ return signer, 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 spew.Sdump(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)

+ }

+ return fmt.Sprintf("0x%x", ethash.SeedHash(number)), nil

+}

+

+// PrivateDebugAPI is the collection of Ethereum 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 key-value database.

+func (api *PrivateDebugAPI) ChaindbProperty(property string) (string, error) {

+ if property == "" {

+ property = "leveldb.stats"

+ } else if !strings.HasPrefix(property, "leveldb.") {

+ property = "leveldb." + property

+ }

+ return api.b.ChainDb().Stat(property)

+}

+

+// ChaindbCompact flattens the entire key-value database into a single level,

+// removing all unused slots and merging all keys.

+func (api *PrivateDebugAPI) ChaindbCompact() error {

+ for b := byte(0); b < 255; b++ {

+ log.Info("Compacting chain database", "range", fmt.Sprintf("0x%0.2X-0x%0.2X", b, b+1))

+ if err := api.b.ChainDb().Compact([]byte{b}, []byte{b + 1}); err != nil {

+ log.Error("Database compaction failed", "err", err)

+ return err

+ }

+ }

+ return nil

+}

+

+// SetHead rewinds the head of the blockchain to a previous block.

+func (api *PrivateDebugAPI) SetHead(number hexutil.Uint64) {

+ api.b.SetHead(uint64(number))

+}

+

+// PublicNetAPI offers network related RPC methods

+type PublicNetAPI struct {

+ net *p2p.Server

+ networkVersion uint64

+}

+

+// NewPublicNetAPI creates a new net API instance.

+func NewPublicNetAPI(net *p2p.Server, networkVersion uint64) *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() hexutil.Uint {

+ return hexutil.Uint(s.net.PeerCount())

+}

+

+// Version returns the current ethereum protocol version.

+func (s *PublicNetAPI) Version() string {

+ return fmt.Sprintf("%d", s.networkVersion)

+}

+// Copyright 2015 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 implements the general Ethereum API functions.

+package ethapi

+

+import (

+ "context"

+ "math/big"

+

+ "github.com/ethereum/go-ethereum/accounts"

+ "github.com/ethereum/go-ethereum/common"

+ "github.com/ethereum/go-ethereum/core"

+ "github.com/ethereum/go-ethereum/core/bloombits"

+ "github.com/ethereum/go-ethereum/core/state"

+ "github.com/ethereum/go-ethereum/core/types"

+ "github.com/ethereum/go-ethereum/core/vm"

+ "github.com/ethereum/go-ethereum/eth/downloader"

+ "github.com/ethereum/go-ethereum/ethdb"

+ "github.com/ethereum/go-ethereum/event"

+ "github.com/ethereum/go-ethereum/params"

+ "github.com/ethereum/go-ethereum/rpc"

+)

+

+// Backend interface provides the common API services (that are provided by

+// both full and light clients) with access to necessary functions.

+type Backend interface {

+ // General Ethereum API

+ Downloader() *downloader.Downloader

+ ProtocolVersion() int

+ SuggestPrice(ctx context.Context) (*big.Int, error)

+ ChainDb() ethdb.Database

+ EventMux() *event.TypeMux

+ AccountManager() *accounts.Manager

+ ExtRPCEnabled() bool

+ RPCGasCap() *big.Int // global gas cap for eth_call over rpc: DoS protection

+

+ // Blockchain API

+ SetHead(number uint64)

+ HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error)

+ HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error)

+ BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error)

+ BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error)

+ StateAndHeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*state.StateDB, *types.Header, error)

+ GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error)

+ GetTd(hash common.Hash) *big.Int

+ GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header) (*vm.EVM, func() error, error)

+ SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription

+ SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription

+ SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription

+

+ // Transaction pool API

+ SendTx(ctx context.Context, signedTx *types.Transaction) error

+ GetTransaction(ctx context.Context, txHash common.Hash) (*types.Transaction, common.Hash, uint64, uint64, error)

+ GetPoolTransactions() (types.Transactions, error)

+ GetPoolTransaction(txHash common.Hash) *types.Transaction

+ GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error)

+ Stats() (pending int, queued int)

+ TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions)

+ SubscribeNewTxsEvent(chan<- core.NewTxsEvent) event.Subscription

+

+ // Filter API

+ BloomStatus() (uint64, uint64)

+ GetLogs(ctx context.Context, blockHash common.Hash) ([][]*types.Log, error)

+ ServiceFilter(ctx context.Context, session *bloombits.MatcherSession)

+ SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription

+ SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription

+

+ ChainConfig() *params.ChainConfig

+ CurrentBlock() *types.Block

+}

+

+func GetAPIs(apiBackend Backend) []rpc.API {

+ nonceLock := new(AddrLocker)

+ return []rpc.API{

+ {

+ Namespace: "eth",

+ Version: "1.0",

+ Service: NewPublicEthereumAPI(apiBackend),

+ Public: true,

+ }, {

+ Namespace: "eth",

+ Version: "1.0",

+ Service: NewPublicBlockChainAPI(apiBackend),

+ Public: true,

+ }, {

+ Namespace: "eth",

+ Version: "1.0",

+ Service: NewPublicTransactionPoolAPI(apiBackend, nonceLock),

+ Public: true,

+ }, {

+ Namespace: "txpool",

+ Version: "1.0",

+ Service: NewPublicTxPoolAPI(apiBackend),

+ Public: true,

+ }, {

+ Namespace: "debug",

+ Version: "1.0",

+ Service: NewPublicDebugAPI(apiBackend),

+ Public: true,

+ }, {

+ Namespace: "debug",

+ Version: "1.0",

+ Service: NewPrivateDebugAPI(apiBackend),

+ }, {

+ Namespace: "eth",

+ Version: "1.0",

+ Service: NewPublicAccountAPI(apiBackend.AccountManager()),

+ Public: true,

+ }, {

+ Namespace: "personal",

+ Version: "1.0",

+ Service: NewPrivateAccountAPI(apiBackend, nonceLock),

+ Public: false,

+ },

+ }

+}