117 lines
3.0 KiB
Go
117 lines
3.0 KiB
Go
package rpc
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import (
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"encoding/json"
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"fmt"
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"github.com/ethereum/go-ethereum/jsre"
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"github.com/robertkrimen/otto"
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"github.com/ethereum/go-ethereum/rpc/comms"
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"github.com/ethereum/go-ethereum/rpc/codec"
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"github.com/ethereum/go-ethereum/rpc/shared"
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"reflect"
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)
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type Jeth struct {
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ethApi *EthereumApi
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re *jsre.JSRE
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ipcpath string
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}
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func NewJeth(ethApi *EthereumApi, re *jsre.JSRE, ipcpath string) *Jeth {
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return &Jeth{ethApi, re, ipcpath}
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}
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func (self *Jeth) err(call otto.FunctionCall, code int, msg string, id interface{}) (response otto.Value) {
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rpcerr := &RpcErrorObject{code, msg}
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call.Otto.Set("ret_jsonrpc", jsonrpcver)
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call.Otto.Set("ret_id", id)
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call.Otto.Set("ret_error", rpcerr)
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response, _ = call.Otto.Run(`
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ret_response = { jsonrpc: ret_jsonrpc, id: ret_id, error: ret_error };
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`)
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return
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}
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func (self *Jeth) Send(call otto.FunctionCall) (response otto.Value) {
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reqif, err := call.Argument(0).Export()
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if err != nil {
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return self.err(call, -32700, err.Error(), nil)
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}
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client, err := comms.NewIpcClient(comms.IpcConfig{self.ipcpath}, codec.JSON)
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if err != nil {
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fmt.Println("Unable to connect to geth.")
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return self.err(call, -32603, err.Error(), -1)
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}
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defer client.Close()
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jsonreq, err := json.Marshal(reqif)
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var reqs []RpcRequest
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batch := true
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err = json.Unmarshal(jsonreq, &reqs)
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if err != nil {
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reqs = make([]RpcRequest, 1)
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err = json.Unmarshal(jsonreq, &reqs[0])
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batch = false
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}
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call.Otto.Set("response_len", len(reqs))
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call.Otto.Run("var ret_response = new Array(response_len);")
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for i, req := range reqs {
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err := client.Send(&req)
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if err != nil {
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fmt.Println("Error send request:", err)
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return self.err(call, -32603, err.Error(), req.Id)
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}
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respif, err := client.Recv()
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if err != nil {
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fmt.Println("Error recv response:", err)
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return self.err(call, -32603, err.Error(), req.Id)
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}
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if res, ok := respif.(shared.SuccessResponse); ok {
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call.Otto.Set("ret_id", res.Id)
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call.Otto.Set("ret_jsonrpc", res.Jsonrpc)
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resObj, _ := json.Marshal(res.Result)
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call.Otto.Set("ret_result", string(resObj))
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call.Otto.Set("response_idx", i)
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response, err = call.Otto.Run(`
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ret_response[response_idx] = { jsonrpc: ret_jsonrpc, id: ret_id, result: JSON.parse(ret_result) };
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`)
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} else if res, ok := respif.(shared.ErrorResponse); ok {
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fmt.Printf("Error: %s (%d)\n", res.Error.Message, res.Error.Code)
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call.Otto.Set("ret_id", res.Id)
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call.Otto.Set("ret_jsonrpc", res.Jsonrpc)
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call.Otto.Set("ret_error", res.Error)
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call.Otto.Set("response_idx", i)
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response, _ = call.Otto.Run(`
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ret_response = { jsonrpc: ret_jsonrpc, id: ret_id, error: ret_error };
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`)
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return
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} else {
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fmt.Printf("unexpected response\n", reflect.TypeOf(respif))
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}
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}
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if !batch {
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call.Otto.Run("ret_response = ret_response[0];")
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}
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if call.Argument(1).IsObject() {
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call.Otto.Set("callback", call.Argument(1))
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call.Otto.Run(`
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if (Object.prototype.toString.call(callback) == '[object Function]') {
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callback(null, ret_response);
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}
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`)
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}
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return
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}
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