forked from gagliardetto/solana-go
/
programSubscribe.go
100 lines (90 loc) · 2.43 KB
/
programSubscribe.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 (
"github.com/Arculus-Holdings-L-L-C/solana-go"
"github.com/Arculus-Holdings-L-L-C/solana-go/rpc"
)
type ProgramResult struct {
Context struct {
Slot uint64
} `json:"context"`
Value rpc.KeyedAccount `json:"value"`
}
// ProgramSubscribe subscribes to a program to receive notifications
// when the lamports or data for a given account owned by the program changes.
func (cl *Client) ProgramSubscribe(
programID solana.PublicKey,
commitment rpc.CommitmentType,
) (*ProgramSubscription, error) {
return cl.ProgramSubscribeWithOpts(
programID,
commitment,
"",
nil,
)
}
// ProgramSubscribe subscribes to a program to receive notifications
// when the lamports or data for a given account owned by the program changes.
func (cl *Client) ProgramSubscribeWithOpts(
programID solana.PublicKey,
commitment rpc.CommitmentType,
encoding solana.EncodingType,
filters []rpc.RPCFilter,
) (*ProgramSubscription, error) {
params := []interface{}{programID.String()}
conf := map[string]interface{}{
"encoding": "base64",
}
if commitment != "" {
conf["commitment"] = commitment
}
if encoding != "" {
conf["encoding"] = encoding
}
if filters != nil && len(filters) > 0 {
conf["filters"] = filters
}
genSub, err := cl.subscribe(
params,
conf,
"programSubscribe",
"programUnsubscribe",
func(msg []byte) (interface{}, error) {
var res ProgramResult
err := decodeResponseFromMessage(msg, &res)
return &res, err
},
)
if err != nil {
return nil, err
}
return &ProgramSubscription{
sub: genSub,
}, nil
}
type ProgramSubscription struct {
sub *Subscription
}
func (sw *ProgramSubscription) Recv() (*ProgramResult, error) {
select {
case d := <-sw.sub.stream:
return d.(*ProgramResult), nil
case err := <-sw.sub.err:
return nil, err
}
}
func (sw *ProgramSubscription) Unsubscribe() {
sw.sub.Unsubscribe()
}