forked from gagliardetto/solana-go
/
signatureSubscribe.go
111 lines (98 loc) · 2.74 KB
/
signatureSubscribe.go
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// Copyright 2021 github.com/gagliardetto
//
// 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 ws
import (
"fmt"
"time"
"github.com/Arculus-Holdings-L-L-C/solana-go"
"github.com/Arculus-Holdings-L-L-C/solana-go/rpc"
)
type SignatureResult struct {
Context struct {
Slot uint64
} `json:"context"`
Value struct {
Err interface{} `json:"err"`
} `json:"value"`
}
// SignatureSubscribe subscribes to a transaction signature to receive
// notification when the transaction is confirmed On signatureNotification,
// the subscription is automatically cancelled
func (cl *Client) SignatureSubscribe(
signature solana.Signature, // Transaction Signature.
commitment rpc.CommitmentType, // (optional)
) (*SignatureSubscription, error) {
params := []interface{}{signature.String()}
conf := map[string]interface{}{}
if commitment != "" {
conf["commitment"] = commitment
}
genSub, err := cl.subscribe(
params,
conf,
"signatureSubscribe",
"signatureUnsubscribe",
func(msg []byte) (interface{}, error) {
var res SignatureResult
err := decodeResponseFromMessage(msg, &res)
return &res, err
},
)
if err != nil {
return nil, err
}
return &SignatureSubscription{
sub: genSub,
}, nil
}
type SignatureSubscription struct {
sub *Subscription
}
func (sw *SignatureSubscription) Recv() (*SignatureResult, error) {
select {
case d := <-sw.sub.stream:
return d.(*SignatureResult), nil
case err := <-sw.sub.err:
return nil, err
}
}
func (sw *SignatureSubscription) Err() <-chan error {
return sw.sub.err
}
func (sw *SignatureSubscription) Response() <-chan *SignatureResult {
typedChan := make(chan *SignatureResult, 1)
go func(ch chan *SignatureResult) {
// TODO: will this subscription yield more than one result?
d, ok := <-sw.sub.stream
if !ok {
return
}
ch <- d.(*SignatureResult)
}(typedChan)
return typedChan
}
var ErrTimeout = fmt.Errorf("timeout waiting for confirmation")
func (sw *SignatureSubscription) RecvWithTimeout(timeout time.Duration) (*SignatureResult, error) {
select {
case <-time.After(timeout):
return nil, ErrTimeout
case d := <-sw.sub.stream:
return d.(*SignatureResult), nil
case err := <-sw.sub.err:
return nil, err
}
}
func (sw *SignatureSubscription) Unsubscribe() {
sw.sub.Unsubscribe()
}