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config.go
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config.go
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// Go Substrate RPC Client (GSRPC) provides APIs and types around Polkadot and any Substrate-based chain RPC calls
//
// Copyright 2019 Centrifuge GmbH
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package config
import (
"os"
"time"
)
type Config struct {
RPCURL string
// Timeouts
DialTimeout time.Duration
SubscribeTimeout time.Duration
}
// DefaultConfig returns the default config. Default values can be overwritten with env variables, most importantly
// RPC_URL for a custom RPC endpoint.
func Default() Config {
return Config{
RPCURL: extractDefaultRPCURL(),
DialTimeout: 10 * time.Second,
SubscribeTimeout: 5 * time.Second,
}
}
// ExtractDefaultRPCURL reads the env variable RPC_URL and returns it. If that variable is unset or empty,
// it will fallback to "http://127.0.0.1:9933"
func extractDefaultRPCURL() string {
if url, ok := os.LookupEnv("RPC_URL"); ok {
return url
}
// Fallback
return "ws://127.0.0.1:9944"
}