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package rpc
import (
"encoding/json"
"fmt"
"github.com/ethereum/go-ethereum/jsre"
"github.com/ethereum/go-ethereum/rpc/comms"
"github.com/ethereum/go-ethereum/rpc/shared"
"github.com/robertkrimen/otto"
)
type Jeth struct {
ethApi shared.EthereumApi
re *jsre.JSRE
client comms.EthereumClient
}
func NewJeth(ethApi shared.EthereumApi, re *jsre.JSRE, client comms.EthereumClient) *Jeth {
return &Jeth{ethApi, re, client}
}
func (self *Jeth) err(call otto.FunctionCall, code int, msg string, id interface{}) (response otto.Value) {
errObj := fmt.Sprintf("{\"message\": \"%s\", \"code\": %d}", msg, code)
retResponse := fmt.Sprintf("ret_response = JSON.parse('{\"jsonrpc\": \"%s\", \"id\": %v, \"error\": %s}');", shared.JsonRpcVersion, id, errObj)
call.Otto.Run("ret_error = " + errObj)
res, _ := call.Otto.Run(retResponse)
return res
}
func (self *Jeth) Send(call otto.FunctionCall) (response otto.Value) {
reqif, err := call.Argument(0).Export()
if err != nil {
return self.err(call, -32700, err.Error(), nil)
}
jsonreq, err := json.Marshal(reqif)
var reqs []shared.Request
batch := true
err = json.Unmarshal(jsonreq, &reqs)
if err != nil {
reqs = make([]shared.Request, 1)
err = json.Unmarshal(jsonreq, &reqs[0])
batch = false
}
call.Otto.Set("response_len", len(reqs))
call.Otto.Run("var ret_response = new Array(response_len);")
for i, req := range reqs {
var respif interface{}
err := self.client.Send(&req)
if err != nil {
return self.err(call, -32603, err.Error(), req.Id)
}
respif, err = self.client.Recv()
if err != nil {
return self.err(call, -32603, err.Error(), req.Id)
}
call.Otto.Set("ret_jsonrpc", shared.JsonRpcVersion)
call.Otto.Set("ret_id", req.Id)
res, _ := json.Marshal(respif)
call.Otto.Set("ret_result", string(res))
call.Otto.Set("response_idx", i)
response, err = call.Otto.Run(`
ret_response[response_idx] = { jsonrpc: ret_jsonrpc, id: ret_id, result: JSON.parse(ret_result) };
`)
}
if !batch {
call.Otto.Run("ret_response = ret_response[0];")
}
if call.Argument(1).IsObject() {
call.Otto.Set("callback", call.Argument(1))
call.Otto.Run(`
if (Object.prototype.toString.call(callback) == '[object Function]') {
callback(null, ret_response);
}
`)
}
return
}
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