92 lines
2.2 KiB
Go
92 lines
2.2 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/ethereum/go-ethereum/rpc/comms"
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"github.com/ethereum/go-ethereum/rpc/shared"
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"github.com/robertkrimen/otto"
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)
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type Jeth struct {
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ethApi shared.EthereumApi
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re *jsre.JSRE
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client comms.EthereumClient
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}
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func NewJeth(ethApi shared.EthereumApi, re *jsre.JSRE, client comms.EthereumClient) *Jeth {
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return &Jeth{ethApi, re, client}
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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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errObj := fmt.Sprintf("{\"message\": \"%s\", \"code\": %d}", msg, code)
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retResponse := fmt.Sprintf("ret_response = JSON.parse('{\"jsonrpc\": \"%s\", \"id\": %v, \"error\": %s}');", shared.JsonRpcVersion, id, errObj)
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call.Otto.Run("ret_error = " + errObj)
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res, _ := call.Otto.Run(retResponse)
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return res
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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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jsonreq, err := json.Marshal(reqif)
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var reqs []shared.Request
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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([]shared.Request, 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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var respif interface{}
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err := self.client.Send(&req)
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if err != nil {
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return self.err(call, -32603, err.Error(), req.Id)
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}
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respif, err = self.client.Recv()
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if err != nil {
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return self.err(call, -32603, err.Error(), req.Id)
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}
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call.Otto.Set("ret_jsonrpc", shared.JsonRpcVersion)
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call.Otto.Set("ret_id", req.Id)
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res, _ := json.Marshal(respif)
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call.Otto.Set("ret_result", string(res))
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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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}
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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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