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 }