package rpc
import (
"encoding/json"
"fmt"
"math/big"
"path"
"strings"
"sync"
"github.com/ethereum/go-ethereum/common"
"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/event"
"github.com/ethereum/go-ethereum/state"
"github.com/ethereum/go-ethereum/xeth"
)
var (
defaultGasPrice = big.NewInt(150000000000)
defaultGas = big.NewInt(500000)
)
type EthereumApi struct {
eth *xeth.XEth
xethMu sync.RWMutex
mux *event.TypeMux
// // Register keeps a list of accounts and transaction data
// regmut sync.Mutex
// register map[string][]*NewTxArgs
db common.Database
}
func NewEthereumApi(eth *xeth.XEth, dataDir string) *EthereumApi {
db, _ := ethdb.NewLDBDatabase(path.Join(dataDir, "dapps"))
api := &EthereumApi{
eth: eth,
mux: eth.Backend().EventMux(),
db: db,
}
return api
}
func (self *EthereumApi) xethWithStateNum(num int64) *xeth.XEth {
chain := self.xeth().Backend().ChainManager()
var block *types.Block
if num < 0 {
num = chain.CurrentBlock().Number().Int64() + num + 1
}
block = chain.GetBlockByNumber(uint64(num))
var st *state.StateDB
if block != nil {
st = state.New(block.Root(), self.xeth().Backend().StateDb())
} else {
st = chain.State()
}
return self.xeth().WithState(st)
}
func (self *EthereumApi) getStateWithNum(num int64) *xeth.State {
return self.xethWithStateNum(num).State()
}
// func (self *EthereumApi) Register(args string, reply *interface{}) error {
// self.regmut.Lock()
// defer self.regmut.Unlock()
// if _, ok := self.register[args]; ok {
// self.register[args] = nil // register with empty
// }
// return nil
// }
// func (self *EthereumApi) Unregister(args string, reply *interface{}) error {
// self.regmut.Lock()
// defer self.regmut.Unlock()
// delete(self.register, args)
// return nil
// }
// func (self *EthereumApi) WatchTx(args string, reply *interface{}) error {
// self.regmut.Lock()
// defer self.regmut.Unlock()
// txs := self.register[args]
// self.register[args] = nil
// *reply = txs
// return nil
// }
func (p *EthereumApi) Transact(args *NewTxArgs, reply *interface{}) (err error) {
// TODO if no_private_key then
//if _, exists := p.register[args.From]; exists {
// p.register[args.From] = append(p.register[args.From], args)
//} else {
/*
account := accounts.Get(common.FromHex(args.From))
if account != nil {
if account.Unlocked() {
if !unlockAccount(account) {
return
}
}
result, _ := account.Transact(common.FromHex(args.To), common.FromHex(args.Value), common.FromHex(args.Gas), common.FromHex(args.GasPrice), common.FromHex(args.Data))
if len(result) > 0 {
*reply = common.ToHex(result)
}
} else if _, exists := p.register[args.From]; exists {
p.register[ags.From] = append(p.register[args.From], args)
}
*/
if err := args.requirements(); err != nil {
return err
}
// TODO: align default values to have the same type, e.g. not depend on
// common.Value conversions later on
if args.Gas.Cmp(big.NewInt(0)) == 0 {
args.Gas = defaultGas
}
if args.GasPrice.Cmp(big.NewInt(0)) == 0 {
args.GasPrice = defaultGasPrice
}
*reply, err = p.xeth().Transact(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data)
if err != nil {
fmt.Println("err:", err)
return err
}
return nil
}
func (p *EthereumApi) Call(args *NewTxArgs, reply *interface{}) error {
result, err := p.xethWithStateNum(args.BlockNumber).Call(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data)
if err != nil {
return err
}
*reply = result
return nil
}
func (p *EthereumApi) GetStorageAt(args *GetStorageAtArgs, reply *interface{}) error {
if err := args.requirements(); err != nil {
return err
}
state := p.xethWithStateNum(args.BlockNumber).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 = common.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) UninstallWhisperFilter(id int, reply *interface{}) error {
*reply = p.xeth().UninstallWhisperFilter(id)
return nil
}
func (self *EthereumApi) MessagesChanged(id int, reply *interface{}) error {
*reply = self.xeth().MessagesChanged(id)
return nil
}
func (p *EthereumApi) GetBlockByHash(blockhash string, includetx bool) (*BlockRes, error) {
block := p.xeth().EthBlockByHash(blockhash)
br := NewBlockRes(block)
br.fullTx = includetx
return br, nil
}
func (p *EthereumApi) GetBlockByNumber(blocknum int64, includetx bool) (*BlockRes, error) {
block := p.xeth().EthBlockByNumber(blocknum)
br := NewBlockRes(block)
br.fullTx = includetx
return br, nil
}
func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error {
// Spec at https://github.com/ethereum/wiki/wiki/Generic-JSON-RPC
rpclogger.Infof("%s %s", req.Method, req.Params)
switch req.Method {
case "web3_sha3":
args := new(Sha3Args)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
*reply = common.ToHex(crypto.Sha3(common.FromHex(args.Data)))
case "web3_clientVersion":
*reply = p.xeth().Backend().Version()
case "net_version":
return NewNotImplementedError(req.Method)
case "net_listening":
*reply = p.xeth().IsListening()
case "net_peerCount":
*reply = common.ToHex(big.NewInt(int64(p.xeth().PeerCount())).Bytes())
case "eth_coinbase":
// TODO handling of empty coinbase due to lack of accounts
res := p.xeth().Coinbase()
if res == "0x" || res == "0x0" {
*reply = nil
} else {
*reply = res
}
case "eth_mining":
*reply = p.xeth().IsMining()
case "eth_gasPrice":
*reply = common.ToHex(defaultGasPrice.Bytes())
case "eth_accounts":
*reply = p.xeth().Accounts()
case "eth_blockNumber":
*reply = common.ToHex(p.xeth().Backend().ChainManager().CurrentBlock().Number().Bytes())
case "eth_getBalance":
args := new(GetBalanceArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
if err := args.requirements(); err != nil {
return err
}
*reply = common.ToHex(p.xethWithStateNum(args.BlockNumber).State().SafeGet(args.Address).Balance().Bytes())
case "eth_getStorage", "eth_storageAt":
args := new(GetStorageArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
if err := args.requirements(); err != nil {
return err
}
*reply = p.xethWithStateNum(args.BlockNumber).State().SafeGet(args.Address).Storage()
case "eth_getStorageAt":
args := new(GetStorageAtArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
return p.GetStorageAt(args, reply)
case "eth_getTransactionCount":
args := new(GetTxCountArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
err := args.requirements()
if err != nil {
return err
}
*reply = p.xethWithStateNum(args.BlockNumber).TxCountAt(args.Address)
case "eth_getBlockTransactionCountByHash":
args := new(GetBlockByHashArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
block := p.xeth().EthBlockByHash(args.BlockHash)
br := NewBlockRes(block)
*reply = common.ToHex(big.NewInt(int64(len(br.Transactions))).Bytes())
case "eth_getBlockTransactionCountByNumber":
args := new(GetBlockByNumberArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
block := p.xeth().EthBlockByNumber(args.BlockNumber)
br := NewBlockRes(block)
*reply = common.ToHex(big.NewInt(int64(len(br.Transactions))).Bytes())
case "eth_getUncleCountByBlockHash":
args := new(GetBlockByHashArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
block := p.xeth().EthBlockByHash(args.BlockHash)
br := NewBlockRes(block)
*reply = common.ToHex(big.NewInt(int64(len(br.Uncles))).Bytes())
case "eth_getUncleCountByBlockNumber":
args := new(GetBlockByNumberArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
block := p.xeth().EthBlockByNumber(args.BlockNumber)
br := NewBlockRes(block)
*reply = common.ToHex(big.NewInt(int64(len(br.Uncles))).Bytes())
case "eth_getData", "eth_getCode":
args := new(GetDataArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
if err := args.requirements(); err != nil {
return err
}
*reply = p.xethWithStateNum(args.BlockNumber).CodeAt(args.Address)
case "eth_sendTransaction", "eth_transact":
args := new(NewTxArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
return p.Transact(args, reply)
case "eth_call":
args := new(NewTxArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
return p.Call(args, reply)
case "eth_flush":
return NewNotImplementedError(req.Method)
case "eth_getBlockByHash":
args := new(GetBlockByHashArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
v, err := p.GetBlockByHash(args.BlockHash, args.Transactions)
if err != nil {
return err
}
*reply = v
case "eth_getBlockByNumber":
args := new(GetBlockByNumberArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
v, err := p.GetBlockByNumber(args.BlockNumber, args.Transactions)
if err != nil {
return err
}
*reply = v
case "eth_getTransactionByHash":
// HashIndexArgs used, but only the "Hash" part we need.
args := new(HashIndexArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
}
tx := p.xeth().EthTransactionByHash(args.Hash)
if tx != nil {
*reply = NewTransactionRes(tx)
}
case "eth_getTransactionByBlockHashAndIndex":
args := new(HashIndexArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
v, err := p.GetBlockByHash(args.Hash, true)
if err != nil {
return err
}
if args.Index > int64(len(v.Transactions)) || args.Index < 0 {
return NewValidationError("Index", "does not exist")
}
*reply = v.Transactions[args.Index]
case "eth_getTransactionByBlockNumberAndIndex":
args := new(BlockNumIndexArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
v, err := p.GetBlockByNumber(args.BlockNumber, true)
if err != nil {
return err
}
if args.Index > int64(len(v.Transactions)) || args.Index < 0 {
return NewValidationError("Index", "does not exist")
}
*reply = v.Transactions[args.Index]
case "eth_getUncleByBlockHashAndIndex":
args := new(HashIndexArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
v, err := p.GetBlockByHash(args.Hash, false)
if err != nil {
return err
}
if args.Index > int64(len(v.Uncles)) || args.Index < 0 {
return NewValidationError("Index", "does not exist")
}
uncle, err := p.GetBlockByHash(common.ToHex(v.Uncles[args.Index]), false)
if err != nil {
return err
}
*reply = uncle
case "eth_getUncleByBlockNumberAndIndex":
args := new(BlockNumIndexArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
v, err := p.GetBlockByNumber(args.BlockNumber, true)
if err != nil {
return err
}
if args.Index > int64(len(v.Uncles)) || args.Index < 0 {
return NewValidationError("Index", "does not exist")
}
uncle, err := p.GetBlockByHash(common.ToHex(v.Uncles[args.Index]), false)
if err != nil {
return err
}
*reply = uncle
case "eth_getCompilers":
c := []string{""}
*reply = c
case "eth_compileSolidity", "eth_compileLLL", "eth_compileSerpent":
return NewNotImplementedError(req.Method)
case "eth_newFilter":
args := new(FilterOptions)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
opts := toFilterOptions(args)
id := p.xeth().RegisterFilter(opts)
*reply = common.ToHex(big.NewInt(int64(id)).Bytes())
case "eth_newBlockFilter":
args := new(FilterStringArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
if err := args.requirements(); err != nil {
return err
}
id := p.xeth().NewFilterString(args.Word)
*reply = common.ToHex(big.NewInt(int64(id)).Bytes())
case "eth_uninstallFilter":
args := new(FilterIdArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
*reply = p.xeth().UninstallFilter(args.Id)
case "eth_getFilterChanges":
args := new(FilterIdArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
*reply = NewLogsRes(p.xeth().FilterChanged(args.Id))
case "eth_getFilterLogs":
args := new(FilterIdArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
*reply = NewLogsRes(p.xeth().Logs(args.Id))
case "eth_getLogs":
args := new(FilterOptions)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
opts := toFilterOptions(args)
*reply = NewLogsRes(p.xeth().AllLogs(opts))
case "eth_getWork", "eth_submitWork":
return NewNotImplementedError(req.Method)
case "db_putString":
args := new(DbArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
if err := args.requirements(); err != nil {
return err
}
p.db.Put([]byte(args.Database+args.Key), []byte(args.Value))
*reply = true
case "db_getString":
args := new(DbArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
if err := args.requirements(); err != nil {
return err
}
res, _ := p.db.Get([]byte(args.Database + args.Key))
*reply = string(res)
case "db_putHex", "db_getHex":
return NewNotImplementedError(req.Method)
case "shh_post":
args := new(WhisperMessageArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
err := p.xeth().Whisper().Post(args.Payload, args.To, args.From, args.Topics, args.Priority, args.Ttl)
if err != nil {
return err
}
*reply = true
case "shh_newIdentity":
*reply = p.xeth().Whisper().NewIdentity()
// case "shh_removeIdentity":
// args := new(WhisperIdentityArgs)
// if err := json.Unmarshal(req.Params, &args); err != nil {
// return err
// }
// *reply = p.xeth().Whisper().RemoveIdentity(args.Identity)
case "shh_hasIdentity":
args := new(WhisperIdentityArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
*reply = p.xeth().Whisper().HasIdentity(args.Identity)
case "shh_newGroup", "shh_addToGroup":
return NewNotImplementedError(req.Method)
case "shh_newFilter":
args := new(WhisperFilterArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
opts := new(xeth.Options)
opts.From = args.From
opts.To = args.To
opts.Topics = args.Topics
id := p.xeth().NewWhisperFilter(opts)
*reply = common.ToHex(big.NewInt(int64(id)).Bytes())
case "shh_uninstallFilter":
args := new(FilterIdArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
return p.UninstallWhisperFilter(args.Id, reply)
case "shh_getFilterChanges":
args := new(FilterIdArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
return p.MessagesChanged(args.Id, reply)
case "shh_getMessages":
args := new(FilterIdArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return err
}
*reply = p.xeth().Whisper().Messages(args.Id)
// case "eth_register":
// args, err := req.ToRegisterArgs()
// if err != nil {
// return err
// }
// return p.Register(args, reply)
// case "eth_unregister":
// args, err := req.ToRegisterArgs()
// if err != nil {
// return err
// }
// return p.Unregister(args, reply)
// case "eth_watchTx":
// args, err := req.ToWatchTxArgs()
// if err != nil {
// return err
// }
// return p.WatchTx(args, reply)
default:
return NewNotImplementedError(req.Method)
}
rpclogger.DebugDetailf("Reply: %T %s", reply, reply)
return nil
}
func (self *EthereumApi) xeth() *xeth.XEth {
self.xethMu.RLock()
defer self.xethMu.RUnlock()
return self.eth
}
func toFilterOptions(options *FilterOptions) *core.FilterOptions {
var opts core.FilterOptions
// Convert optional address slice/string to byte slice
if str, ok := options.Address.(string); ok {
opts.Address = [][]byte{common.FromHex(str)}
} else if slice, ok := options.Address.([]interface{}); ok {
bslice := make([][]byte, len(slice))
for i, addr := range slice {
if saddr, ok := addr.(string); ok {
bslice[i] = common.FromHex(saddr)
}
}
opts.Address = bslice
}
opts.Earliest = options.Earliest
opts.Latest = options.Latest
topics := make([][][]byte, len(options.Topics))
for i, topicDat := range options.Topics {
if slice, ok := topicDat.([]interface{}); ok {
topics[i] = make([][]byte, len(slice))
for j, topic := range slice {
topics[i][j] = common.FromHex(topic.(string))
}
} else if str, ok := topicDat.(string); ok {
topics[i] = make([][]byte, 1)
topics[i][0] = common.FromHex(str)
}
}
opts.Topics = topics
return &opts
}