// NewWhisperFilter creates and registers a new message filter to watch for inbound whisper messages.
func (s *PublicWhisperAPI) NewFilter(args *NewFilterArgs) (*rpc.HexNumber, error) {
if s.w == nil {
return nil, whisperOffLineErr
}
var id int
filter := Filter{
To: crypto.ToECDSAPub(common.FromHex(args.To)),
From: crypto.ToECDSAPub(common.FromHex(args.From)),
Topics: NewFilterTopics(args.Topics...),
Fn: func(message *Message) {
wmsg := NewWhisperMessage(message)
s.messagesMu.RLock() // Only read lock to the filter pool
defer s.messagesMu.RUnlock()
if s.messages[id] != nil {
s.messages[id].insert(wmsg)
}
},
}
id = s.w.Watch(filter)
s.messagesMu.Lock()
s.messages[id] = newWhisperFilter(id, s.w)
s.messagesMu.Unlock()
return rpc.NewHexNumber(id), nil
}
// Post injects a message into the whisper network for distribution.
func (s *PublicWhisperAPI) Post(args *PostArgs) (bool, error) {
if s.w == nil {
return false, whisperOffLineErr
}
// construct whisper message with transmission options
message := NewMessage(common.FromHex(args.Payload))
options := Options{
To: crypto.ToECDSAPub(common.FromHex(args.To)),
TTL: time.Duration(args.TTL) * time.Second,
Topics: NewTopics(args.Topics...),
}
// set sender identity
if len(args.From) > 0 {
if key := s.w.GetIdentity(crypto.ToECDSAPub(common.FromHex(args.From))); key != nil {
options.From = key
} else {
return false, fmt.Errorf("unknown identity to send from: %s", args.From)
}
}
// Wrap and send the message
pow := time.Duration(args.Priority) * time.Millisecond
envelope, err := message.Wrap(pow, options)
if err != nil {
return false, err
}
return true, s.w.Send(envelope)
}
func (args *PostArgs) UnmarshalJSON(data []byte) (err error) {
var obj struct {
From string `json:"from"`
To string `json:"to"`
Topics []string `json:"topics"`
Payload string `json:"payload"`
Priority rpc.HexNumber `json:"priority"`
TTL rpc.HexNumber `json:"ttl"`
}
if err := json.Unmarshal(data, &obj); err != nil {
return err
}
args.From = obj.From
args.To = obj.To
args.Payload = obj.Payload
args.Priority = obj.Priority.Int64()
args.TTL = obj.TTL.Int64()
// decode topic strings
args.Topics = make([][]byte, len(obj.Topics))
for i, topic := range obj.Topics {
args.Topics[i] = common.FromHex(topic)
}
return nil
}
// BlockNumber retrieves the current head number of the blockchain.
func (api *API) BlockNumber() (uint64, error) {
res, err := api.request("eth_blockNumber", nil)
if err != nil {
return 0, err
}
var hex string
if err := json.Unmarshal(res, &hex); err != nil {
return 0, err
}
return new(big.Int).SetBytes(common.FromHex(hex)).Uint64(), nil
}
// Syncing returns the current sync status of the node, or nil if the node is not
// currently synchronizing with the network.
func (api *API) Syncing() (*SyncStatus, error) {
// Execute the request and check if syncing is not running
res, err := api.request("eth_syncing", nil)
if err != nil {
return nil, err
}
var running bool
if err := json.Unmarshal(res, &running); err == nil {
return nil, nil
}
// Sync is running, extract the current status
result := make(map[string]string)
if err := json.Unmarshal(res, &result); err != nil {
return nil, err
}
return &SyncStatus{
StartingBlock: new(big.Int).SetBytes(common.FromHex(result["startingBlock"])).Uint64(),
CurrentBlock: new(big.Int).SetBytes(common.FromHex(result["currentBlock"])).Uint64(),
HighestBlock: new(big.Int).SetBytes(common.FromHex(result["highestBlock"])).Uint64(),
}, nil
}
func (s *PublicBlockChainAPI) doCall(args CallArgs, blockNr rpc.BlockNumber) (string, *big.Int, error) {
if block := blockByNumber(s.miner, s.bc, blockNr); block != nil {
stateDb, err := state.New(block.Root(), s.chainDb)
if err != nil {
return "0x", nil, err
}
stateDb = stateDb.Copy()
var from *state.StateObject
if args.From == (common.Address{}) {
accounts, err := s.am.Accounts()
if err != nil || len(accounts) == 0 {
from = stateDb.GetOrNewStateObject(common.Address{})
} else {
from = stateDb.GetOrNewStateObject(accounts[0].Address)
}
} else {
from = stateDb.GetOrNewStateObject(args.From)
}
from.SetBalance(common.MaxBig)
msg := callmsg{
from: from,
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)
}
header := s.bc.CurrentBlock().Header()
vmenv := core.NewEnv(stateDb, s.bc, msg, header)
gp := new(core.GasPool).AddGas(common.MaxBig)
res, gas, err := core.ApplyMessage(vmenv, msg, gp)
if len(res) == 0 { // backwards compatability
return "0x", gas, err
}
return common.ToHex(res), gas, err
}
return "0x", common.Big0, nil
}
// GetBlockTime retrieves the block of the given number from the canonical chain.
func (api *API) GetBlockTime(num uint64) (time.Time, error) {
res, err := api.request("eth_getBlockByNumber", []interface{}{rpc.NewHexNumber(num), true})
if err != nil {
return time.Time{}, err
}
result := make(map[string]json.RawMessage)
if err := json.Unmarshal(res, &result); err != nil {
return time.Time{}, err
}
var hex string
if err := json.Unmarshal(result["timestamp"], &hex); err != nil {
return time.Time{}, err
}
return time.Unix(new(big.Int).SetBytes(common.FromHex(hex)).Int64(), 0), nil
}
// Call forms a transaction from the given arguments and tries to execute it on
// a private VM with a copy of the state. Any changes are therefore only temporary
// and not part of the actual state. This allows for local execution/queries.
func (be *registryAPIBackend) Call(fromStr, toStr, valueStr, gasStr, gasPriceStr, dataStr string) (string, string, error) {
block := be.bc.CurrentBlock()
statedb, err := state.New(block.Root(), be.chainDb)
if err != nil {
return "", "", err
}
var from *state.StateObject
if len(fromStr) == 0 {
accounts, err := be.am.Accounts()
if err != nil || len(accounts) == 0 {
from = statedb.GetOrNewStateObject(common.Address{})
} else {
from = statedb.GetOrNewStateObject(accounts[0].Address)
}
} else {
from = statedb.GetOrNewStateObject(common.HexToAddress(fromStr))
}
from.SetBalance(common.MaxBig)
msg := callmsg{
from: from,
gas: common.Big(gasStr),
gasPrice: common.Big(gasPriceStr),
value: common.Big(valueStr),
data: common.FromHex(dataStr),
}
if len(toStr) > 0 {
addr := common.HexToAddress(toStr)
msg.to = &addr
}
if msg.gas.Cmp(big.NewInt(0)) == 0 {
msg.gas = big.NewInt(50000000)
}
if msg.gasPrice.Cmp(big.NewInt(0)) == 0 {
msg.gasPrice = new(big.Int).Mul(big.NewInt(50), common.Shannon)
}
header := be.bc.CurrentBlock().Header()
vmenv := core.NewEnv(statedb, be.bc, msg, header)
gp := new(core.GasPool).AddGas(common.MaxBig)
res, gas, err := core.ApplyMessage(vmenv, msg, gp)
return common.ToHex(res), gas.String(), err
}
// 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(encodedTx string) (string, error) {
tx := new(types.Transaction)
if err := rlp.DecodeBytes(common.FromHex(encodedTx), tx); err != nil {
return "", err
}
s.txPool.SetLocal(tx)
if err := s.txPool.Add(tx); err != nil {
return "", err
}
if tx.To() == nil {
from, err := tx.From()
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
}
// HasIdentity checks if the the whisper node is configured with the private key
// of the specified public pair.
func (s *PublicWhisperAPI) HasIdentity(identity string) (bool, error) {
if s.w == nil {
return false, whisperOffLineErr
}
return s.w.HasIdentity(crypto.ToECDSAPub(common.FromHex(identity))), nil
}
// UnmarshalJSON implements the json.Unmarshaler interface, invoked to convert a
// JSON message blob into a WhisperFilterArgs structure.
func (args *NewFilterArgs) UnmarshalJSON(b []byte) (err error) {
// Unmarshal the JSON message and sanity check
var obj struct {
To interface{} `json:"to"`
From interface{} `json:"from"`
Topics interface{} `json:"topics"`
}
if err := json.Unmarshal(b, &obj); err != nil {
return err
}
// Retrieve the simple data contents of the filter arguments
if obj.To == nil {
args.To = ""
} else {
argstr, ok := obj.To.(string)
if !ok {
return fmt.Errorf("to is not a string")
}
args.To = argstr
}
if obj.From == nil {
args.From = ""
} else {
argstr, ok := obj.From.(string)
if !ok {
return fmt.Errorf("from is not a string")
}
args.From = argstr
}
// Construct the nested topic array
if obj.Topics != nil {
// Make sure we have an actual topic array
list, ok := obj.Topics.([]interface{})
if !ok {
return fmt.Errorf("topics is not an array")
}
// Iterate over each topic and handle nil, string or array
topics := make([][]string, len(list))
for idx, field := range list {
switch value := field.(type) {
case nil:
topics[idx] = []string{}
case string:
topics[idx] = []string{value}
case []interface{}:
topics[idx] = make([]string, len(value))
for i, nested := range value {
switch value := nested.(type) {
case nil:
topics[idx][i] = ""
case string:
topics[idx][i] = value
default:
return fmt.Errorf("topic[%d][%d] is not a string", idx, i)
}
}
default:
return fmt.Errorf("topic[%d] not a string or array", idx)
}
}
topicsDecoded := make([][][]byte, len(topics))
for i, condition := range topics {
topicsDecoded[i] = make([][]byte, len(condition))
for j, topic := range condition {
topicsDecoded[i][j] = common.FromHex(topic)
}
}
args.Topics = topicsDecoded
}
return nil
}
// ServeHTTP implements http.Handler, extracting and validating payment headers
// contained within the HTTP request. If payment information is accepted, the
// request is passed on to the internal service for execution. Otherwise the proxy
// short circuits the request and sends back an appropriate error.
func (p *Proxy) ServeHTTP(w http.ResponseWriter, r *http.Request) {
reqLogger := p.logger.New("request-id", atomic.AddUint32(&p.autoid, 1))
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("Access-Control-Expose-Headers", VerificationHeader)
// Short circuit CORS pre-flight requests
if r.Method == "OPTIONS" {
reqLogger.Debug("Allowing CORS pre-flight request")
w.Header().Set("Access-Control-Allow-Headers", r.Header.Get("Access-Control-Request-Headers"))
return
}
// Allow head requests through for data APIs to query the content size
if r.Method == "HEAD" {
reqLogger.Debug("Allowing data HEAD request")
w.Header().Set("Access-Control-Expose-Headers", "Content-Length, Content-Range")
res, err := p.service(r)
if err != nil {
reqLogger.Error("Failed to process API request", "error", err)
http.Error(w, "Failed to execute request", http.StatusInternalServerError)
return
}
defer res.Body.Close()
p.forward(w, res)
return
}
// Retrieve the authorization header from the original request
authHeader := r.Header.Get(AuthorizationHeader)
reqLogger.Debug("Received an API request", "authorization", authHeader)
// Ensure that all payment information are present
if authHeader == "" {
p.fail(w, &verification{Error: "Missing HTTP header: " + AuthorizationHeader})
return
}
auth := new(authorization)
if err := json.Unmarshal([]byte(authHeader), auth); err != nil {
p.fail(w, &verification{Error: "Invalid authorization header: " + err.Error()})
return
}
// Process the request and payment based on the proxy type
switch p.kind {
case CallProxy:
// Make sure the consumer authorized the payment for this call
consumer, provider := common.HexToAddress(auth.Consumer), common.HexToAddress(auth.Provider)
if !p.verifier.Exists(consumer, provider) {
p.fail(w, &verification{Unknown: true, Error: "Non existent API subscription"})
return
}
nonce := p.verifier.Nonce(consumer, provider).Uint64()
if auth.Nonce != nonce {
p.fail(w, &verification{Error: "Invalid nonce", Nonce: nonce})
return
}
valid, funded := p.verifier.Verify(consumer, provider, auth.Nonce, new(big.Int).SetUint64(auth.Amount), common.FromHex(auth.Signature))
if !valid {
p.fail(w, &verification{Error: "Invalid authorization signature"})
return
}
if !funded {
p.fail(w, &verification{Error: "Not enough funds available"})
return
}
price := p.verifier.Price(consumer, provider).Uint64()
if prev := p.vault.Fetch(provider, consumer); prev != nil && prev.Amount+price > auth.Amount {
p.fail(w, &verification{
Error: "Not enough funds authorized",
Authorized: prev.Amount,
Proof: prev.Signature,
Need: prev.Amount + price,
})
return
}
p.vault.Store(auth)
// Execute the API internally and proxy the response
reqLogger.Debug("Payment accepted for API invocation")
res, err := p.service(r)
if err != nil {
reqLogger.Error("Failed to process API request", "error", err)
http.Error(w, "Failed to execute request", http.StatusInternalServerError)
return
}
defer res.Body.Close()
p.forward(w, res)
case DataProxy:
// Since we're paying by the data, retrieve the amount first
res, err := p.service(r)
if err != nil {
reqLogger.Error("Failed to process API request", "error", err)
http.Error(w, "Failed to execute request", http.StatusInternalServerError)
return
}
defer res.Body.Close()
// Make sure the user authorized payment for all the requested data
data := res.ContentLength
if data > 0 /* TODO */ {
reqLogger.Debug("Payment accepted for API stream", "data", data)
p.forward(w, res)
}
}
}
// WriteGenesisBlock writes the genesis block to the database as block number 0
func WriteGenesisBlock(chainDb ethdb.Database, reader io.Reader) (*types.Block, error) {
contents, err := ioutil.ReadAll(reader)
if err != nil {
return nil, err
}
var genesis struct {
Nonce string
Timestamp string
ParentHash string
ExtraData string
GasLimit string
Difficulty string
Mixhash string
Coinbase string
Alloc map[string]struct {
Code string
Storage map[string]string
Balance string
}
}
if err := json.Unmarshal(contents, &genesis); err != nil {
return nil, err
}
// creating with empty hash always works
statedb, _ := state.New(common.Hash{}, chainDb)
for addr, account := range genesis.Alloc {
address := common.HexToAddress(addr)
statedb.AddBalance(address, common.String2Big(account.Balance))
statedb.SetCode(address, common.Hex2Bytes(account.Code))
for key, value := range account.Storage {
statedb.SetState(address, common.HexToHash(key), common.HexToHash(value))
}
}
root, stateBatch := statedb.CommitBatch()
difficulty := common.String2Big(genesis.Difficulty)
block := types.NewBlock(&types.Header{
Nonce: types.EncodeNonce(common.String2Big(genesis.Nonce).Uint64()),
Time: common.String2Big(genesis.Timestamp),
ParentHash: common.HexToHash(genesis.ParentHash),
Extra: common.FromHex(genesis.ExtraData),
GasLimit: common.String2Big(genesis.GasLimit),
Difficulty: difficulty,
MixDigest: common.HexToHash(genesis.Mixhash),
Coinbase: common.HexToAddress(genesis.Coinbase),
Root: root,
}, nil, nil, nil)
if block := GetBlock(chainDb, block.Hash()); block != nil {
glog.V(logger.Info).Infoln("Genesis block already in chain. Writing canonical number")
err := WriteCanonicalHash(chainDb, block.Hash(), block.NumberU64())
if err != nil {
return nil, err
}
return block, nil
}
if err := stateBatch.Write(); err != nil {
return nil, fmt.Errorf("cannot write state: %v", err)
}
if err := WriteTd(chainDb, block.Hash(), difficulty); err != nil {
return nil, err
}
if err := WriteBlock(chainDb, block); err != nil {
return nil, err
}
if err := WriteBlockReceipts(chainDb, block.Hash(), nil); err != nil {
return nil, err
}
if err := WriteCanonicalHash(chainDb, block.Hash(), block.NumberU64()); err != nil {
return nil, err
}
if err := WriteHeadBlockHash(chainDb, block.Hash()); err != nil {
return nil, err
}
return block, nil
}
// Transact forms a transaction from the given arguments and submits it to the
// transactio pool for execution.
func (be *registryAPIBackend) Transact(fromStr, toStr, nonceStr, valueStr, gasStr, gasPriceStr, codeStr string) (string, error) {
if len(toStr) > 0 && toStr != "0x" && !common.IsHexAddress(toStr) {
return "", errors.New("invalid address")
}
var (
from = common.HexToAddress(fromStr)
to = common.HexToAddress(toStr)
value = common.Big(valueStr)
gas *big.Int
price *big.Int
data []byte
contractCreation bool
)
if len(gasStr) == 0 {
gas = big.NewInt(90000)
} else {
gas = common.Big(gasStr)
}
if len(gasPriceStr) == 0 {
price = big.NewInt(10000000000000)
} else {
price = common.Big(gasPriceStr)
}
data = common.FromHex(codeStr)
if len(toStr) == 0 {
contractCreation = true
}
nonce := be.txPool.State().GetNonce(from)
if len(nonceStr) != 0 {
nonce = common.Big(nonceStr).Uint64()
}
var tx *types.Transaction
if contractCreation {
tx = types.NewContractCreation(nonce, value, gas, price, data)
} else {
tx = types.NewTransaction(nonce, to, value, gas, price, data)
}
acc := accounts.Account{from}
signature, err := be.am.Sign(acc, tx.SigHash().Bytes())
if err != nil {
return "", err
}
signedTx, err := tx.WithSignature(signature)
if err != nil {
return "", err
}
be.txPool.SetLocal(signedTx)
if err := be.txPool.Add(signedTx); err != nil {
return "", nil
}
if contractCreation {
addr := crypto.CreateAddress(from, 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().Hex(), nil
}
// Charge will redeem all pending payments made to this provider since startup.
func (v *accountVault) Charge(charger Charger) {
v.lock.RLock()
for _, auth := range v.pends {
tx, err := charger.Charge(common.HexToAddress(auth.Consumer), common.HexToAddress(auth.Provider), auth.Nonce, new(big.Int).SetUint64(auth.Amount), common.FromHex(auth.Signature))
if err != nil {
log15.Error("Failed to charge payment", "authorization", auth, "error", err)
} else {
log15.Info("Payment charged", "tx", "http://testnet.etherscan.io/tx/"+tx.Hex())
}
}
v.lock.RUnlock()
v.lock.Lock()
for consumer, auth := range v.auths {
if v.pends[consumer] == auth {
delete(v.pends, consumer)
}
}
v.lock.Unlock()
}
// SendTransaction will create a transaction for the given transaction argument, sign it and submit it to the
// transaction pool.
func (s *PublicTransactionPoolAPI) SendTransaction(args SendTxArgs) (common.Hash, error) {
if args.Gas == nil {
args.Gas = rpc.NewHexNumber(defaultGas)
}
if args.GasPrice == nil {
args.GasPrice = rpc.NewHexNumber(defaultGasPrice)
}
if args.Value == nil {
args.Value = rpc.NewHexNumber(0)
}
s.txMu.Lock()
defer s.txMu.Unlock()
if args.Nonce == nil {
args.Nonce = rpc.NewHexNumber(s.txPool.State().GetNonce(args.From))
}
var tx *types.Transaction
contractCreation := (args.To == common.Address{})
if contractCreation {
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 common.Hash{}, err
}
s.txPool.SetLocal(signedTx)
if err := s.txPool.Add(signedTx); err != nil {
return common.Hash{}, nil
}
if contractCreation {
addr := crypto.CreateAddress(args.From, args.Nonce.Uint64())
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
}
// Sha3 applies the ethereum sha3 implementation on the input.
// It assumes the input is hex encoded.
func (s *PublicWeb3API) Sha3(input string) string {
return common.ToHex(crypto.Sha3(common.FromHex(input)))
}
// 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(args *SignTransactionArgs) (*SignTransactionResult, error) {
if args.Gas == nil {
args.Gas = rpc.NewHexNumber(defaultGas)
}
if args.GasPrice == nil {
args.GasPrice = rpc.NewHexNumber(defaultGasPrice)
}
if args.Value == nil {
args.Value = rpc.NewHexNumber(0)
}
s.txMu.Lock()
defer s.txMu.Unlock()
if args.Nonce == nil {
args.Nonce = rpc.NewHexNumber(s.txPool.State().GetNonce(args.From))
}
var tx *types.Transaction
contractCreation := (args.To == common.Address{})
if contractCreation {
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(tx)}, nil
}
