/*
This file is part of go-ethereum
go-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
go-ethereum 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/*
For each request type, define the following:
1. RpcRequest "To" method [message.go], which does basic validation and conversion to "Args" type via json.Decoder()
2. json.Decoder() calls "UnmarshalON" defined on each "Args" struct
3. EthereumApi method, taking the "Args" type and replying with an interface to be marshalled to ON
*/
package rpc
import (
"fmt"
"math/big"
"strings"
"sync"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/event/filter"
"github.com/ethereum/go-ethereum/state"
"github.com/ethereum/go-ethereum/xeth"
)
const (
defaultGasPrice = "10000000000000"
defaultGas = "10000"
)
type EthereumApi struct {
xeth *xeth.XEth
filterManager *filter.FilterManager
logMut sync.RWMutex
logs map[int]state.Logs
messagesMut sync.RWMutex
messages map[int][]xeth.WhisperMessage
db ethutil.Database
}
func NewEthereumApi(eth *xeth.XEth) *EthereumApi {
db, _ := ethdb.NewLDBDatabase("dapps")
api := &EthereumApi{
xeth: eth,
filterManager: filter.NewFilterManager(eth.Backend().EventMux()),
logs: make(map[int]state.Logs),
messages: make(map[int][]xeth.WhisperMessage),
db: db,
}
go api.filterManager.Start()
return api
}
func (self *EthereumApi) NewFilter(args *FilterOptions, reply *interface{}) error {
var id int
filter := core.NewFilter(self.xeth.Backend())
filter.SetOptions(toFilterOptions(args))
filter.LogsCallback = func(logs state.Logs) {
self.logMut.Lock()
defer self.logMut.Unlock()
self.logs[id] = append(self.logs[id], logs...)
}
id = self.filterManager.InstallFilter(filter)
*reply = id
return nil
}
func (self *EthereumApi) NewFilterString(args string, reply *interface{}) error {
var id int
filter := core.NewFilter(self.xeth.Backend())
callback := func(block *types.Block) {
self.logs[id] = append(self.logs[id], &state.StateLog{})
}
if args == "pending" {
filter.PendingCallback = callback
} else if args == "chain" {
filter.BlockCallback = callback
}
id = self.filterManager.InstallFilter(filter)
*reply = id
return nil
}
func (self *EthereumApi) FilterChanged(id int, reply *interface{}) error {
self.logMut.RLock()
defer self.logMut.RUnlock()
*reply = toLogs(self.logs[id])
self.logs[id] = nil // empty the logs
return nil
}
func (self *EthereumApi) Logs(id int, reply *interface{}) error {
filter := self.filterManager.GetFilter(id)
*reply = toLogs(filter.Find())
return nil
}
func (p *EthereumApi) GetBlock(args *GetBlockArgs, reply *interface{}) error {
err := args.requirements()
if err != nil {
return err
}
if args.BlockNumber > 0 {
*reply = p.xeth.BlockByNumber(args.BlockNumber)
} else {
*reply = p.xeth.BlockByHash(args.Hash)
}
return nil
}
func (p *EthereumApi) Transact(args *NewTxArgs, reply *interface{}) error {
if len(args.Gas) == 0 {
args.Gas = defaultGas
}
if len(args.GasPrice) == 0 {
args.GasPrice = defaultGasPrice
}
result, _ := p.xeth.Transact( /* TODO specify account */ args.To, args.Value, args.Gas, args.GasPrice, args.Data)
*reply = result
return nil
}
func (p *EthereumApi) Call(args *NewTxArgs, reply *interface{}) error {
result, err := p.xeth.Call( /* TODO specify account */ args.To, args.Value, args.Gas, args.GasPrice, args.Data)
if err != nil {
return err
}
*reply = result
return nil
}
func (p *EthereumApi) PushTx(args *PushTxArgs, reply *interface{}) error {
err := args.requirementsPushTx()
if err != nil {
return err
}
result, _ := p.xeth.PushTx(args.Tx)
*reply = result
return nil
}
func (p *EthereumApi) GetStateAt(args *GetStateArgs, reply *interface{}) error {
err := args.requirements()
if err != nil {
return err
}
state := p.xeth.State().SafeGet(args.Address)
value := state.StorageString(args.Key)
var hx string
if strings.Index(args.Key, "0x") == 0 {
hx = string([]byte(args.Key)[2:])
} else {
// Convert the incoming string (which is a bigint) into hex
i, _ := new(big.Int).SetString(args.Key, 10)
hx = ethutil.Bytes2Hex(i.Bytes())
}
rpclogger.Debugf("GetStateAt(%s, %s)\n", args.Address, hx)
*reply = map[string]string{args.Key: value.Str()}
return nil
}
func (p *EthereumApi) GetStorageAt(args *GetStorageArgs, reply *interface{}) error {
err := args.requirements()
if err != nil {
return err
}
*reply = p.xeth.State().SafeGet(args.Address).Storage()
return nil
}
func (p *EthereumApi) GetPeerCount(reply *interface{}) error {
*reply = p.xeth.PeerCount()
return nil
}
func (p *EthereumApi) GetIsListening(reply *interface{}) error {
*reply = p.xeth.IsListening()
return nil
}
func (p *EthereumApi) GetCoinbase(reply *interface{}) error {
*reply = p.xeth.Coinbase()
return nil
}
func (p *EthereumApi) Accounts(reply *interface{}) error {
*reply = p.xeth.Accounts()
return nil
}
func (p *EthereumApi) GetIsMining(reply *interface{}) error {
*reply = p.xeth.IsMining()
return nil
}
func (p *EthereumApi) BlockNumber(reply *interface{}) error {
*reply = p.xeth.Backend().ChainManager().CurrentBlock().Number()
return nil
}
func (p *EthereumApi) GetTxCountAt(args *GetTxCountArgs, reply *interface{}) error {
err := args.requirements()
if err != nil {
return err
}
*reply = p.xeth.TxCountAt(args.Address)
return nil
}
func (p *EthereumApi) GetBalanceAt(args *GetBalanceArgs, reply *interface{}) error {
err := args.requirements()
if err != nil {
return err
}
state := p.xeth.State().SafeGet(args.Address)
*reply = toHex(state.Balance().Bytes())
return nil
}
func (p *EthereumApi) GetCodeAt(args *GetCodeAtArgs, reply *interface{}) error {
err := args.requirements()
if err != nil {
return err
}
*reply = p.xeth.CodeAt(args.Address)
return nil
}
func (p *EthereumApi) Sha3(args *Sha3Args, reply *interface{}) error {
*reply = toHex(crypto.Sha3(fromHex(args.Data)))
return nil
}
func (p *EthereumApi) DbPut(args *DbArgs, reply *interface{}) error {
err := args.requirements()
if err != nil {
return err
}
p.db.Put([]byte(args.Database+args.Key), []byte(args.Value))
*reply = true
return nil
}
func (p *EthereumApi) DbGet(args *DbArgs, reply *interface{}) error {
err := args.requirements()
if err != nil {
return err
}
res, _ := p.db.Get([]byte(args.Database + args.Key))
*reply = string(res)
return nil
}
func (p *EthereumApi) NewWhisperIdentity(reply *interface{}) error {
*reply = p.xeth.Whisper().NewIdentity()
return nil
}
func (p *EthereumApi) NewWhisperFilter(args *xeth.Options, reply *interface{}) error {
var id int
args.Fn = func(msg xeth.WhisperMessage) {
p.messagesMut.Lock()
defer p.messagesMut.Unlock()
p.messages[id] = append(p.messages[id], msg)
}
id = p.xeth.Whisper().Watch(args)
*reply = id
return nil
}
func (self *EthereumApi) MessagesChanged(id int, reply *interface{}) error {
self.messagesMut.RLock()
defer self.messagesMut.RUnlock()
*reply = self.messages[id]
self.messages[id] = nil // empty the messages
return nil
}
func (p *EthereumApi) WhisperPost(args *WhisperMessageArgs, reply *interface{}) error {
err := p.xeth.Whisper().Post(args.Payload, args.To, args.From, args.Topics, args.Priority, args.Ttl)
if err != nil {
return err
}
*reply = true
return nil
}
func (p *EthereumApi) HasWhisperIdentity(args string, reply *interface{}) error {
*reply = p.xeth.Whisper().HasIdentity(args)
return nil
}
func (p *EthereumApi) WhisperMessages(id int, reply *interface{}) error {
*reply = p.xeth.Whisper().Messages(id)
return nil
}
func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error {
// Spec at https://github.com/ethereum/wiki/wiki/Generic-ON-RPC
rpclogger.DebugDetailf("%T %s", req.Params, req.Params)
switch req.Method {
case "eth_coinbase":
return p.GetCoinbase(reply)
case "eth_listening":
return p.GetIsListening(reply)
case "eth_mining":
return p.GetIsMining(reply)
case "eth_peerCount":
return p.GetPeerCount(reply)
case "eth_number":
return p.BlockNumber(reply)
case "eth_accounts":
return p.Accounts(reply)
case "eth_countAt":
args, err := req.ToGetTxCountArgs()
if err != nil {
return err
}
return p.GetTxCountAt(args, reply)
case "eth_codeAt":
args, err := req.ToGetCodeAtArgs()
if err != nil {
return err
}
return p.GetCodeAt(args, reply)
case "eth_balanceAt":
args, err := req.ToGetBalanceArgs()
if err != nil {
return err
}
return p.GetBalanceAt(args, reply)
case "eth_stateAt":
args, err := req.ToGetStateArgs()
if err != nil {
return err
}
return p.GetStateAt(args, reply)
case "eth_storageAt":
args, err := req.ToStorageAtArgs()
if err != nil {
return err
}
return p.GetStorageAt(args, reply)
case "eth_blockByNumber", "eth_blockByHash":
args, err := req.ToGetBlockArgs()
if err != nil {
return err
}
return p.GetBlock(args, reply)
case "eth_transact":
args, err := req.ToNewTxArgs()
if err != nil {
return err
}
return p.Transact(args, reply)
case "eth_call":
args, err := req.ToNewTxArgs()
if err != nil {
return err
}
return p.Call(args, reply)
case "eth_newFilter":
args, err := req.ToFilterArgs()
if err != nil {
return err
}
return p.NewFilter(args, reply)
case "eth_newFilterString":
args, err := req.ToFilterStringArgs()
if err != nil {
return err
}
return p.NewFilterString(args, reply)
case "eth_changed":
args, err := req.ToFilterChangedArgs()
if err != nil {
return err
}
return p.FilterChanged(args, reply)
case "eth_gasPrice":
*reply = defaultGasPrice
return nil
case "web3_sha3":
args, err := req.ToSha3Args()
if err != nil {
return err
}
return p.Sha3(args, reply)
case "db_put":
args, err := req.ToDbPutArgs()
if err != nil {
return err
}
return p.DbPut(args, reply)
case "db_get":
args, err := req.ToDbGetArgs()
if err != nil {
return err
}
return p.DbGet(args, reply)
case "shh_newIdentity":
return p.NewWhisperIdentity(reply)
case "shh_newFilter":
args, err := req.ToWhisperFilterArgs()
if err != nil {
return err
}
return p.NewWhisperFilter(args, reply)
case "shh_changed":
args, err := req.ToWhisperIdArgs()
if err != nil {
return err
}
return p.MessagesChanged(args, reply)
case "shh_post":
args, err := req.ToWhisperPostArgs()
if err != nil {
return err
}
return p.WhisperPost(args, reply)
case "shh_haveIdentity":
args, err := req.ToWhisperHasIdentityArgs()
if err != nil {
return err
}
return p.HasWhisperIdentity(args, reply)
case "shh_getMessages":
args, err := req.ToWhisperIdArgs()
if err != nil {
return err
}
return p.WhisperMessages(args, reply)
default:
return NewErrorResponse(fmt.Sprintf("%v %s", ErrorNotImplemented, req.Method))
}
rpclogger.DebugDetailf("Reply: %T %s", reply, reply)
return nil
}
