forked from cerc-io/plugeth
109 lines
2.1 KiB
Go
109 lines
2.1 KiB
Go
package main
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import (
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"bufio"
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"fmt"
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"github.com/ethereum/eth-go"
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"github.com/ethereum/eth-go/ethpub"
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"github.com/robertkrimen/otto"
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"os"
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)
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type JSConsole struct {
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vm *otto.Otto
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lib *ethpub.PEthereum
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}
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func NewJSConsole(ethereum *eth.Ethereum) *JSConsole {
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return &JSConsole{vm: otto.New(), lib: ethpub.NewPEthereum(ethereum)}
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}
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func (self *JSConsole) Start() {
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self.initBindings()
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fmt.Println("Eth JavaScript console")
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reader := bufio.NewReader(os.Stdin)
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for {
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fmt.Printf("eth >>> ")
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str, _, err := reader.ReadLine()
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if err != nil {
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fmt.Println("Error reading input", err)
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} else {
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self.ParseInput(string(str))
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}
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}
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}
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func (self *JSConsole) ParseInput(code string) {
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defer func() {
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if r := recover(); r != nil {
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fmt.Println("[native] error", r)
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}
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}()
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value, err := self.vm.Run(code)
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if err != nil {
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fmt.Println(err)
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return
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}
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fmt.Println(value)
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}
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func (self *JSConsole) initBindings() {
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t := &JSWrapper{self.lib, self.vm}
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self.vm.Set("eth", t)
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}
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// The JS wrapper attempts to wrap the PEthereum object and returns
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// proper javascript objects
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type JSWrapper struct {
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*ethpub.PEthereum
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vm *otto.Otto
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}
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func (self *JSWrapper) GetKey() otto.Value {
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return self.toVal(self.PEthereum.GetKey())
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}
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func (self *JSWrapper) GetStateObject(addr string) otto.Value {
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return self.toVal(self.PEthereum.GetStateObject(addr))
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}
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func (self *JSWrapper) Transact(key, recipient, valueStr, gasStr, gasPriceStr, dataStr string) otto.Value {
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r, err := self.PEthereum.Transact(key, recipient, valueStr, gasStr, gasPriceStr, dataStr)
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if err != nil {
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fmt.Println(err)
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return otto.UndefinedValue()
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}
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return self.toVal(r)
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}
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func (self *JSWrapper) Create(key, valueStr, gasStr, gasPriceStr, initStr, bodyStr string) otto.Value {
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r, err := self.PEthereum.Create(key, valueStr, gasStr, gasPriceStr, initStr, bodyStr)
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if err != nil {
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fmt.Println(err)
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return otto.UndefinedValue()
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}
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return self.toVal(r)
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}
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// Wrapper function
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func (self *JSWrapper) toVal(v interface{}) otto.Value {
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result, err := self.vm.ToValue(v)
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if err != nil {
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fmt.Println(err)
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return otto.UndefinedValue()
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}
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return result
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}
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