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package main
import (
"fmt"
"github.com/ethereum/eth-go"
"github.com/ethereum/eth-go/ethpub"
"github.com/robertkrimen/otto"
)
type Repl interface {
Start()
}
type JSRE struct {
vm *otto.Otto
lib *ethpub.PEthereum
}
func NewJSRE(ethereum *eth.Ethereum) *JSRE {
re := &JSRE{vm: otto.New(), lib: ethpub.NewPEthereum(ethereum)}
re.Bind("eth", &JSEthereum{re.lib, re.vm})
return re
}
func (self *JSRE) Bind(name string, v interface{}) {
self.vm.Set(name, v)
}
func (self *JSRE) Run(code string) (otto.Value, error) {
return self.vm.Run(code)
}
type JSRepl struct {
re *JSRE
}
func NewJSRepl(ethereum *eth.Ethereum) *JSRepl {
return &JSRepl{re: NewJSRE(ethereum)}
}
func (self *JSRepl) Start() {
fmt.Println("Eth JavaScript console")
self.read()
}
func (self *JSRepl) parseInput(code string) {
defer func() {
if r := recover(); r != nil {
fmt.Println("[native] error", r)
}
}()
value, err := self.re.Run(code)
if err != nil {
fmt.Println(err)
return
}
fmt.Println(value)
}
// The JSEthereum object attempts to wrap the PEthereum object and returns
// meaningful javascript objects
type JSEthereum struct {
*ethpub.PEthereum
vm *otto.Otto
}
func (self *JSEthereum) GetKey() otto.Value {
return self.toVal(self.PEthereum.GetKey())
}
func (self *JSEthereum) GetStateObject(addr string) otto.Value {
return self.toVal(self.PEthereum.GetStateObject(addr))
}
func (self *JSEthereum) Transact(key, recipient, valueStr, gasStr, gasPriceStr, dataStr string) otto.Value {
r, err := self.PEthereum.Transact(key, recipient, valueStr, gasStr, gasPriceStr, dataStr)
if err != nil {
fmt.Println(err)
return otto.UndefinedValue()
}
return self.toVal(r)
}
func (self *JSEthereum) Create(key, valueStr, gasStr, gasPriceStr, initStr, bodyStr string) otto.Value {
r, err := self.PEthereum.Create(key, valueStr, gasStr, gasPriceStr, initStr, bodyStr)
if err != nil {
fmt.Println(err)
return otto.UndefinedValue()
}
return self.toVal(r)
}
// Wrapper function
func (self *JSEthereum) toVal(v interface{}) otto.Value {
result, err := self.vm.ToValue(v)
if err != nil {
fmt.Println(err)
return otto.UndefinedValue()
}
return result
}
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