package rpc import ( "encoding/json" "fmt" "github.com/ethereum/go-ethereum/jsre" "github.com/robertkrimen/otto" "github.com/ethereum/go-ethereum/rpc/comms" "github.com/ethereum/go-ethereum/rpc/codec" "github.com/ethereum/go-ethereum/rpc/shared" "reflect" ) type Jeth struct { ethApi *EthereumApi re *jsre.JSRE ipcpath string } func NewJeth(ethApi *EthereumApi, re *jsre.JSRE, ipcpath string) *Jeth { return &Jeth{ethApi, re, ipcpath} } func (self *Jeth) err(call otto.FunctionCall, code int, msg string, id interface{}) (response otto.Value) { rpcerr := &RpcErrorObject{code, msg} call.Otto.Set("ret_jsonrpc", jsonrpcver) call.Otto.Set("ret_id", id) call.Otto.Set("ret_error", rpcerr) response, _ = call.Otto.Run(` ret_response = { jsonrpc: ret_jsonrpc, id: ret_id, error: ret_error }; `) return } 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) } client, err := comms.NewIpcClient(comms.IpcConfig{self.ipcpath}, codec.JSON) if err != nil { fmt.Println("Unable to connect to geth.") return self.err(call, -32603, err.Error(), -1) } defer client.Close() jsonreq, err := json.Marshal(reqif) var reqs []RpcRequest batch := true err = json.Unmarshal(jsonreq, &reqs) if err != nil { reqs = make([]RpcRequest, 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 { err := client.Send(&req) if err != nil { fmt.Println("Error send request:", err) return self.err(call, -32603, err.Error(), req.Id) } respif, err := client.Recv() if err != nil { fmt.Println("Error recv response:", err) return self.err(call, -32603, err.Error(), req.Id) } if res, ok := respif.(shared.SuccessResponse); ok { call.Otto.Set("ret_id", res.Id) call.Otto.Set("ret_jsonrpc", res.Jsonrpc) resObj, _ := json.Marshal(res.Result) call.Otto.Set("ret_result", string(resObj)) 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) }; `) } else if res, ok := respif.(shared.ErrorResponse); ok { fmt.Printf("Error: %s (%d)\n", res.Error.Message, res.Error.Code) call.Otto.Set("ret_id", res.Id) call.Otto.Set("ret_jsonrpc", res.Jsonrpc) call.Otto.Set("ret_error", res.Error) call.Otto.Set("response_idx", i) response, _ = call.Otto.Run(` ret_response = { jsonrpc: ret_jsonrpc, id: ret_id, error: ret_error }; `) return } else { fmt.Printf("unexpected response\n", reflect.TypeOf(respif)) } } 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 }