github.com/diadata-org/diadata@v1.4.593/pkg/dia/helpers/substrate-helper/gsrpc/config/config.go (about)

     1  // Go Substrate RPC Client (GSRPC) provides APIs and types around Polkadot and any Substrate-based chain RPC calls
     2  //
     3  // Copyright 2019 Centrifuge GmbH
     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 config
    18  
    19  import (
    20  	"os"
    21  	"time"
    22  )
    23  
    24  type Config struct {
    25  	RPCURL string
    26  
    27  	// Timeouts
    28  	DialTimeout      time.Duration
    29  	SubscribeTimeout time.Duration
    30  }
    31  
    32  // DefaultConfig returns the default config. Default values can be overwritten with env variables, most importantly
    33  // RPC_URL for a custom RPC endpoint.
    34  func Default() Config {
    35  	return Config{
    36  		RPCURL:           extractDefaultRPCURL(),
    37  		DialTimeout:      10 * time.Second,
    38  		SubscribeTimeout: 5 * time.Second,
    39  	}
    40  }
    41  
    42  // ExtractDefaultRPCURL reads the env variable RPC_URL and returns it. If that variable is unset or empty,
    43  // it will fallback to "ws://127.0.0.1:9944"
    44  func extractDefaultRPCURL() string {
    45  	if url, ok := os.LookupEnv("RPC_URL"); ok {
    46  		return url
    47  	}
    48  
    49  	// Fallback
    50  	return "ws://127.0.0.1:9944"
    51  }