github.com/stafiprotocol/go-substrate-rpc-client@v1.4.7/pkg/rpcmocksrv/server.go (about)

     1  // Go Substrate RPC Client (GSRPC) provides APIs and types around Polkadot and any Substrate-based chain RPC calls
     2  //
     3  // Copyright 2020 Stafi Protocol
     4  //
     5  // Licensed under the Apache License, Version 2.0 (the "License");
     6  // you may not use this file except in compliance with the License.
     7  // You may obtain a copy of the License at
     8  //
     9  //     http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  // Unless required by applicable law or agreed to in writing, software
    12  // distributed under the License is distributed on an "AS IS" BASIS,
    13  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  // See the License for the specific language governing permissions and
    15  // limitations under the License.
    16  
    17  package rpcmocksrv
    18  
    19  import (
    20  	"math/rand"
    21  	"strconv"
    22  	"time"
    23  
    24  	gethrpc "github.com/stafiprotocol/go-substrate-rpc-client/pkg/gethrpc"
    25  )
    26  
    27  type Server struct {
    28  	*gethrpc.Server
    29  	// Host consists of hostname and port
    30  	Host string
    31  	// URL consists of protocol, hostname and port
    32  	URL string
    33  }
    34  
    35  // New creates a new RPC mock server with a random port that allows registration of services
    36  func New() *Server {
    37  	port := randomPort()
    38  	host := "localhost:" + strconv.Itoa(port)
    39  
    40  	_, rpcServ, err := gethrpc.StartWSEndpoint(host, []gethrpc.API{}, []string{}, []string{"*"}, true)
    41  	if err != nil {
    42  		panic(err)
    43  	}
    44  	s := Server{
    45  		Server: rpcServ,
    46  		Host:   host,
    47  		URL:    "ws://" + host,
    48  	}
    49  	return &s
    50  }
    51  
    52  func randomPort() int {
    53  	rand.Seed(time.Now().UnixNano())
    54  	min := 10000
    55  	max := 30000
    56  	return rand.Intn(max-min+1) + min
    57  }