mirror of https://github.com/certusone/vouch.git
52 lines
1.6 KiB
Go
52 lines
1.6 KiB
Go
// Copyright © 2020 Attestant Limited.
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"context"
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"sync"
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eth2client "github.com/attestantio/go-eth2-client"
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autoclient "github.com/attestantio/go-eth2-client/auto"
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"github.com/pkg/errors"
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"github.com/spf13/viper"
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)
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var clients map[string]eth2client.Service
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var clientsMu sync.Mutex
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// fetchClient fetches a client service, instantiating it if required.
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func fetchClient(ctx context.Context, address string) (eth2client.Service, error) {
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clientsMu.Lock()
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defer clientsMu.Unlock()
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if clients == nil {
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clients = make(map[string]eth2client.Service)
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}
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var client eth2client.Service
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var exists bool
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if client, exists = clients[address]; !exists {
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var err error
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client, err = autoclient.New(ctx,
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autoclient.WithLogLevel(logLevel(viper.GetString("eth2client.log-level"))),
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autoclient.WithTimeout(viper.GetDuration("eth2client.timeout")),
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autoclient.WithAddress(address))
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if err != nil {
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return nil, errors.Wrap(err, "failed to initiate client")
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}
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clients[address] = client
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}
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return client, nil
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}
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