537 lines
12 KiB
Go
537 lines
12 KiB
Go
/*
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For each request type, define the following:
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1. RpcRequest "To" method [message.go], which does basic validation and conversion to "Args" type via json.Decoder()
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2. json.Decoder() calls "UnmarshalON" defined on each "Args" struct
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3. EthereumApi method, taking the "Args" type and replying with an interface to be marshalled to ON
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*/
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package rpc
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import (
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"fmt"
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"math/big"
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"strings"
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"sync"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/ethutil"
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"github.com/ethereum/go-ethereum/event/filter"
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"github.com/ethereum/go-ethereum/state"
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"github.com/ethereum/go-ethereum/xeth"
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)
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const (
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defaultGasPrice = "10000000000000"
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defaultGas = "10000"
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)
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type EthereumApi struct {
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xeth *xeth.XEth
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filterManager *filter.FilterManager
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logMut sync.RWMutex
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logs map[int]state.Logs
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messagesMut sync.RWMutex
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messages map[int][]xeth.WhisperMessage
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// Register keeps a list of accounts and transaction data
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regmut sync.Mutex
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register map[string][]*NewTxArgs
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db ethutil.Database
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}
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func NewEthereumApi(eth *xeth.XEth) *EthereumApi {
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db, _ := ethdb.NewLDBDatabase("dapps")
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api := &EthereumApi{
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xeth: eth,
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filterManager: filter.NewFilterManager(eth.Backend().EventMux()),
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logs: make(map[int]state.Logs),
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messages: make(map[int][]xeth.WhisperMessage),
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db: db,
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}
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go api.filterManager.Start()
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return api
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}
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func (self *EthereumApi) Register(args string, reply *interface{}) error {
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self.regmut.Lock()
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defer self.regmut.Unlock()
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if _, ok := self.register[args]; ok {
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self.register[args] = nil // register with empty
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}
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return nil
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}
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func (self *EthereumApi) Unregister(args string, reply *interface{}) error {
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self.regmut.Lock()
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defer self.regmut.Unlock()
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delete(self.register, args)
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return nil
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}
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func (self *EthereumApi) WatchTx(args string, reply *interface{}) error {
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self.regmut.Lock()
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defer self.regmut.Unlock()
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txs := self.register[args]
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self.register[args] = nil
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*reply = txs
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return nil
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}
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func (self *EthereumApi) NewFilter(args *FilterOptions, reply *interface{}) error {
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var id int
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filter := core.NewFilter(self.xeth.Backend())
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filter.SetOptions(toFilterOptions(args))
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filter.LogsCallback = func(logs state.Logs) {
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self.logMut.Lock()
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defer self.logMut.Unlock()
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self.logs[id] = append(self.logs[id], logs...)
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}
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id = self.filterManager.InstallFilter(filter)
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*reply = id
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return nil
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}
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func (self *EthereumApi) NewFilterString(args string, reply *interface{}) error {
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var id int
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filter := core.NewFilter(self.xeth.Backend())
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callback := func(block *types.Block) {
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self.logMut.Lock()
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defer self.logMut.Unlock()
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self.logs[id] = append(self.logs[id], &state.StateLog{})
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}
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if args == "pending" {
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filter.PendingCallback = callback
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} else if args == "chain" {
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filter.BlockCallback = callback
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}
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id = self.filterManager.InstallFilter(filter)
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*reply = id
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return nil
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}
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func (self *EthereumApi) FilterChanged(id int, reply *interface{}) error {
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self.logMut.Lock()
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defer self.logMut.Unlock()
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*reply = toLogs(self.logs[id])
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self.logs[id] = nil // empty the logs
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return nil
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}
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func (self *EthereumApi) Logs(id int, reply *interface{}) error {
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self.logMut.Lock()
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defer self.logMut.Unlock()
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filter := self.filterManager.GetFilter(id)
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if filter != nil {
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*reply = toLogs(filter.Find())
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}
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return nil
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}
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func (p *EthereumApi) GetBlock(args *GetBlockArgs, reply *interface{}) error {
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err := args.requirements()
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if err != nil {
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return err
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}
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if args.BlockNumber > 0 {
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*reply = p.xeth.BlockByNumber(args.BlockNumber)
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} else {
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*reply = p.xeth.BlockByHash(args.Hash)
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}
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return nil
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}
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func (p *EthereumApi) Transact(args *NewTxArgs, reply *interface{}) error {
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if len(args.Gas) == 0 {
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args.Gas = defaultGas
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}
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if len(args.GasPrice) == 0 {
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args.GasPrice = defaultGasPrice
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}
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// TODO if no_private_key then
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if _, exists := p.register[args.From]; exists {
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p.register[args.From] = append(p.register[args.From], args)
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} else {
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result, _ := p.xeth.Transact( /* TODO specify account */ args.To, args.Value, args.Gas, args.GasPrice, args.Data)
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*reply = result
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}
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return nil
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}
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func (p *EthereumApi) Call(args *NewTxArgs, reply *interface{}) error {
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result, err := p.xeth.Call( /* TODO specify account */ args.To, args.Value, args.Gas, args.GasPrice, args.Data)
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if err != nil {
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return err
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}
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*reply = result
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return nil
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}
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func (p *EthereumApi) PushTx(args *PushTxArgs, reply *interface{}) error {
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err := args.requirementsPushTx()
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if err != nil {
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return err
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}
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result, _ := p.xeth.PushTx(args.Tx)
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*reply = result
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return nil
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}
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func (p *EthereumApi) GetStateAt(args *GetStateArgs, reply *interface{}) error {
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err := args.requirements()
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if err != nil {
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return err
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}
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state := p.xeth.State().SafeGet(args.Address)
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value := state.StorageString(args.Key)
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var hx string
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if strings.Index(args.Key, "0x") == 0 {
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hx = string([]byte(args.Key)[2:])
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} else {
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// Convert the incoming string (which is a bigint) into hex
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i, _ := new(big.Int).SetString(args.Key, 10)
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hx = ethutil.Bytes2Hex(i.Bytes())
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}
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rpclogger.Debugf("GetStateAt(%s, %s)\n", args.Address, hx)
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*reply = map[string]string{args.Key: value.Str()}
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return nil
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}
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func (p *EthereumApi) GetStorageAt(args *GetStorageArgs, reply *interface{}) error {
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err := args.requirements()
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if err != nil {
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return err
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}
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*reply = p.xeth.State().SafeGet(args.Address).Storage()
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return nil
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}
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func (p *EthereumApi) GetPeerCount(reply *interface{}) error {
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*reply = p.xeth.PeerCount()
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return nil
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}
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func (p *EthereumApi) GetIsListening(reply *interface{}) error {
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*reply = p.xeth.IsListening()
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return nil
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}
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func (p *EthereumApi) GetCoinbase(reply *interface{}) error {
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*reply = p.xeth.Coinbase()
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return nil
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}
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func (p *EthereumApi) Accounts(reply *interface{}) error {
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*reply = p.xeth.Accounts()
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return nil
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}
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func (p *EthereumApi) GetIsMining(reply *interface{}) error {
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*reply = p.xeth.IsMining()
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return nil
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}
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func (p *EthereumApi) BlockNumber(reply *interface{}) error {
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*reply = p.xeth.Backend().ChainManager().CurrentBlock().Number()
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return nil
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}
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func (p *EthereumApi) GetTxCountAt(args *GetTxCountArgs, reply *interface{}) error {
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err := args.requirements()
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if err != nil {
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return err
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}
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*reply = p.xeth.TxCountAt(args.Address)
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return nil
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}
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func (p *EthereumApi) GetBalanceAt(args *GetBalanceArgs, reply *interface{}) error {
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err := args.requirements()
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if err != nil {
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return err
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}
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state := p.xeth.State().SafeGet(args.Address)
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*reply = toHex(state.Balance().Bytes())
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return nil
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}
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func (p *EthereumApi) GetCodeAt(args *GetCodeAtArgs, reply *interface{}) error {
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err := args.requirements()
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if err != nil {
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return err
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}
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*reply = p.xeth.CodeAt(args.Address)
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return nil
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}
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func (p *EthereumApi) Sha3(args *Sha3Args, reply *interface{}) error {
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*reply = toHex(crypto.Sha3(fromHex(args.Data)))
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return nil
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}
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func (p *EthereumApi) DbPut(args *DbArgs, reply *interface{}) error {
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err := args.requirements()
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if err != nil {
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return err
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}
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p.db.Put([]byte(args.Database+args.Key), []byte(args.Value))
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*reply = true
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return nil
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}
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func (p *EthereumApi) DbGet(args *DbArgs, reply *interface{}) error {
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err := args.requirements()
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if err != nil {
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return err
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}
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res, _ := p.db.Get([]byte(args.Database + args.Key))
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*reply = string(res)
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return nil
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}
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func (p *EthereumApi) NewWhisperIdentity(reply *interface{}) error {
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*reply = p.xeth.Whisper().NewIdentity()
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return nil
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}
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func (p *EthereumApi) NewWhisperFilter(args *xeth.Options, reply *interface{}) error {
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var id int
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args.Fn = func(msg xeth.WhisperMessage) {
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p.messagesMut.Lock()
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defer p.messagesMut.Unlock()
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p.messages[id] = append(p.messages[id], msg)
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}
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id = p.xeth.Whisper().Watch(args)
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*reply = id
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return nil
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}
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func (self *EthereumApi) MessagesChanged(id int, reply *interface{}) error {
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self.messagesMut.Lock()
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defer self.messagesMut.Unlock()
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*reply = self.messages[id]
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self.messages[id] = nil // empty the messages
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return nil
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}
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func (p *EthereumApi) WhisperPost(args *WhisperMessageArgs, reply *interface{}) error {
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err := p.xeth.Whisper().Post(args.Payload, args.To, args.From, args.Topic, args.Priority, args.Ttl)
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if err != nil {
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return err
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}
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*reply = true
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return nil
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}
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func (p *EthereumApi) HasWhisperIdentity(args string, reply *interface{}) error {
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*reply = p.xeth.Whisper().HasIdentity(args)
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return nil
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}
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func (p *EthereumApi) WhisperMessages(id int, reply *interface{}) error {
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*reply = p.xeth.Whisper().Messages(id)
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return nil
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}
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func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error {
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// Spec at https://github.com/ethereum/wiki/wiki/Generic-ON-RPC
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rpclogger.DebugDetailf("%T %s", req.Params, req.Params)
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switch req.Method {
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case "eth_coinbase":
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return p.GetCoinbase(reply)
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case "eth_listening":
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return p.GetIsListening(reply)
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case "eth_mining":
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return p.GetIsMining(reply)
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case "eth_peerCount":
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return p.GetPeerCount(reply)
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case "eth_number":
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return p.BlockNumber(reply)
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case "eth_accounts":
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return p.Accounts(reply)
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case "eth_countAt":
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args, err := req.ToGetTxCountArgs()
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if err != nil {
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return err
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}
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return p.GetTxCountAt(args, reply)
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case "eth_codeAt":
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args, err := req.ToGetCodeAtArgs()
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if err != nil {
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return err
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}
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return p.GetCodeAt(args, reply)
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case "eth_balanceAt":
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args, err := req.ToGetBalanceArgs()
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if err != nil {
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return err
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}
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return p.GetBalanceAt(args, reply)
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case "eth_stateAt":
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args, err := req.ToGetStateArgs()
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if err != nil {
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return err
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}
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return p.GetStateAt(args, reply)
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case "eth_storageAt":
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args, err := req.ToStorageAtArgs()
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if err != nil {
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return err
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}
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return p.GetStorageAt(args, reply)
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case "eth_blockByNumber", "eth_blockByHash":
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args, err := req.ToGetBlockArgs()
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if err != nil {
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return err
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}
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return p.GetBlock(args, reply)
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case "eth_transact":
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args, err := req.ToNewTxArgs()
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if err != nil {
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return err
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}
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return p.Transact(args, reply)
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case "eth_call":
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args, err := req.ToNewTxArgs()
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if err != nil {
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return err
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}
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return p.Call(args, reply)
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case "eth_newFilter":
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args, err := req.ToFilterArgs()
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if err != nil {
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return err
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}
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return p.NewFilter(args, reply)
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case "eth_newFilterString":
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args, err := req.ToFilterStringArgs()
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if err != nil {
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return err
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}
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return p.NewFilterString(args, reply)
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case "eth_changed":
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args, err := req.ToIdArgs()
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if err != nil {
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return err
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}
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return p.FilterChanged(args, reply)
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case "eth_filterLogs":
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args, err := req.ToIdArgs()
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if err != nil {
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return err
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}
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return p.Logs(args, reply)
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case "eth_gasPrice":
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*reply = defaultGasPrice
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return nil
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case "eth_register":
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args, err := req.ToRegisterArgs()
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if err != nil {
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return err
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}
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return p.Register(args, reply)
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case "eth_unregister":
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args, err := req.ToRegisterArgs()
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if err != nil {
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return err
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}
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return p.Unregister(args, reply)
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case "eth_watchTx":
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args, err := req.ToWatchTxArgs()
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if err != nil {
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return err
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}
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return p.WatchTx(args, reply)
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case "web3_sha3":
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args, err := req.ToSha3Args()
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if err != nil {
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return err
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}
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return p.Sha3(args, reply)
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case "db_put":
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args, err := req.ToDbPutArgs()
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if err != nil {
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return err
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}
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return p.DbPut(args, reply)
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case "db_get":
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args, err := req.ToDbGetArgs()
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if err != nil {
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return err
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}
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return p.DbGet(args, reply)
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case "shh_newIdentity":
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return p.NewWhisperIdentity(reply)
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case "shh_newFilter":
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args, err := req.ToWhisperFilterArgs()
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if err != nil {
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return err
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}
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return p.NewWhisperFilter(args, reply)
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case "shh_changed":
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args, err := req.ToIdArgs()
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if err != nil {
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return err
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}
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return p.MessagesChanged(args, reply)
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case "shh_post":
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args, err := req.ToWhisperPostArgs()
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if err != nil {
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return err
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}
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return p.WhisperPost(args, reply)
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case "shh_haveIdentity":
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args, err := req.ToWhisperHasIdentityArgs()
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if err != nil {
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return err
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}
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return p.HasWhisperIdentity(args, reply)
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case "shh_getMessages":
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args, err := req.ToIdArgs()
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if err != nil {
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return err
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}
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return p.WhisperMessages(args, reply)
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default:
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return NewErrorResponse(fmt.Sprintf("%v %s", ErrorNotImplemented, req.Method))
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}
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rpclogger.DebugDetailf("Reply: %T %s", reply, reply)
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return nil
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}
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