129 lines
3.3 KiB
Go
129 lines
3.3 KiB
Go
// Copyright 2020 dfuse Platform Inc.
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//
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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 rpc
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import (
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"context"
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"errors"
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"net"
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"net/http"
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"time"
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"github.com/gagliardetto/solana-go/rpc/jsonrpc"
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"github.com/klauspost/compress/gzhttp"
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"go.uber.org/ratelimit"
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)
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var ErrNotFound = errors.New("not found")
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var ErrNotConfirmed = errors.New("not confirmed")
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type Client struct {
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rpcURL string
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rpcClient JSONRPCClient
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headers http.Header
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}
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type JSONRPCClient interface {
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CallForInto(ctx context.Context, out interface{}, method string, params []interface{}) error
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}
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// New creates a new Solana JSON RPC client.
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func New(rpcEndpoint string) *Client {
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opts := &jsonrpc.RPCClientOpts{
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HTTPClient: newHTTP(),
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}
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rpcClient := jsonrpc.NewClientWithOpts(rpcEndpoint, opts)
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return NewWithCustomRPCClient(rpcClient)
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}
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// NewWithCustomRPCClient creates a new Solana RPC client
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// with the provided RPC client.
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func NewWithCustomRPCClient(rpcClient JSONRPCClient) *Client {
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return &Client{
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rpcClient: rpcClient,
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}
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}
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var _ JSONRPCClient = &clientWithRateLimiting{}
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type clientWithRateLimiting struct {
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rpcClient jsonrpc.RPCClient
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rateLimiter ratelimit.Limiter
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}
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func (wr *clientWithRateLimiting) CallForInto(ctx context.Context, out interface{}, method string, params []interface{}) error {
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wr.rateLimiter.Take()
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return wr.rpcClient.CallForInto(ctx, &out, method, params)
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}
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// NewWithRateLimit creates a new rate-limitted Solana RPC client.
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func NewWithRateLimit(
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rpcEndpoint string,
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rps int, // requests per second
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) JSONRPCClient {
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opts := &jsonrpc.RPCClientOpts{
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HTTPClient: newHTTP(),
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}
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rpcClient := jsonrpc.NewClientWithOpts(rpcEndpoint, opts)
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return &clientWithRateLimiting{
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rpcClient: rpcClient,
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rateLimiter: ratelimit.New(rps),
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}
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}
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func (c *Client) SetHeader(k, v string) {
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if c.headers == nil {
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c.headers = http.Header{}
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}
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c.headers.Set(k, v)
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}
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var (
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defaultMaxIdleConnsPerHost = 9
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defaultTimeout = 5 * time.Minute
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defaultKeepAlive = 180 * time.Second
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)
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func newHTTPTransport() *http.Transport {
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return &http.Transport{
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IdleConnTimeout: defaultTimeout,
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MaxConnsPerHost: defaultMaxIdleConnsPerHost,
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MaxIdleConnsPerHost: defaultMaxIdleConnsPerHost,
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Proxy: http.ProxyFromEnvironment,
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DialContext: (&net.Dialer{
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Timeout: defaultTimeout,
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KeepAlive: defaultKeepAlive,
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DualStack: true,
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}).DialContext,
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ForceAttemptHTTP2: true,
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// MaxIdleConns: 100,
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TLSHandshakeTimeout: 10 * time.Second,
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// ExpectContinueTimeout: 1 * time.Second,
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}
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}
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// newHTTP returns a new Client from the provided config.
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// Client is safe for concurrent use by multiple goroutines.
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func newHTTP() *http.Client {
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tr := newHTTPTransport()
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return &http.Client{
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Timeout: defaultTimeout,
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Transport: gzhttp.Transport(tr),
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}
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}
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