## 請求示例
{% tabs %}
{% tab title="grpccurl" %}
```sh
# without filter
grpcurl -plaintext=false -import-path /path/to/proto -proto solstream.proto -d '' solana.sandwich-detector.blockrazor.me:443 solstream.TxStreamService/SubscribeTxStream
# with filter
grpcurl -plaintext=false -import-path /path/to/proto -proto solstream.proto -d '{"relevantProgramId":"aa..bb"}' solana.sandwich-detector.blockrazor.me:443 solstream.TxStreamService/SubscribeTxStream
```
{% endtab %}
{% tab title="Go" %}
```go
package main
import (
"context"
"crypto/tls"
"log"
pb "solstream/proto/solstream"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
)
func main() {
for {
conn, err := grpc.Dial(
"solana.sandwich-detector.blockrazor.me:443",
grpc.WithTransportCredentials(credentials.NewTLS(&tls.Config{})),
grpc.WithContextDialer(func(ctx context.Context, addr string) (net.Conn, error) { //use ipv4
d := net.Dialer{DualStack: false}
return d.DialContext(ctx, "tcp4", addr)
}),
)
if err != nil {
log.Printf("Failed to connect: %v.\n", err)
continue
}
client := pb.NewTxStreamServiceClient(conn)
stream, err := client.SubscribeTxStream(context.Background(), &pb.TxFilter{
// Empty for no filter
Signer: "",
RelevantProgramId: "",
})
if err != nil {
log.Printf("Error subscribing to stream: %v.\n", err)
conn.Close()
continue
}
log.Println("Successfully subscribed to the stream.")
for {
resp, err := stream.Recv()
if err != nil {
log.Printf("Error receiving stream data: %v. Reconnecting...\n", err)
conn.Close()
break
}
log.Println(resp)
}
}
}
```
{% endtab %}
{% endtabs %}
### **Proto**
```go
// solstream.proto
syntax = "proto3";
package solstream;
option go_package = "proto/solstream";
service TxStreamService {
rpc SubscribeTxStream(TxFilter) returns (stream TxStreamResponse);
}
message TxFilter {
string signer = 1; // (optional) signer of victim tx to filter
string relevantProgramId = 2; // (optional) interacted program id of victim tx to filter. For example, programId of some router
}
message TxStreamResponse {
uint64 slot = 1; // slot of sandwich txs
repeated string txs = 2; // all sandwich tx signatures
string victimtx = 3; // victim tx signature
repeated string attackertxs = 4; // frontrun and backrun tx signature
string signer = 5; // signaer of victim tx
bool heartbeat = 6; // if this resp is heartbeat, to keep stream alive if no sandwich data available
}
```
## 返回示例
```json
{
"slot": "330748316",
"txs": [
"3gDiqwyYnqLtBrkdF5Y6RJiattctYjKu2NfjcAupDBRkhodh9a22XjPYYdhf83FpGUnBe2g1oeLxfpNYG8QyCrUt",
"4joomCxakJxi9vhJ6mRuFStyiUyetaB2X1HMj4g3VUSTMQkPgMTAZ7NaLNMejvfu9zdp7gXp2fM5UEgVK5PohVrP",
"4QgGbPiaNyhgMrkeFrNjZaPNDQTvXqc1THVQJXvbN26gBt8GxQikBzk5fiQyjvffLt8PJUGNw21GU55iErmQcGkC"
],
"victimtx": "4joomCxakJxi9vhJ6mRuFStyiUyetaB2X1HMj4g3VUSTMQkPgMTAZ7NaLNMejvfu9zdp7gXp2fM5UEgVK5PohVrP",
"attackertxs": [
"3gDiqwyYnqLtBrkdF5Y6RJiattctYjKu2NfjcAupDBRkhodh9a22XjPYYdhf83FpGUnBe2g1oeLxfpNYG8QyCrUt",
"4QgGbPiaNyhgMrkeFrNjZaPNDQTvXqc1THVQJXvbN26gBt8GxQikBzk5fiQyjvffLt8PJUGNw21GU55iErmQcGkC"
],
"signer": "Ejhath43fHYtWLbSMfVHCL8eJiLkV22K6w1Ni5xzXofX" // signer of victim tx
}
```
---
# Agent Instructions: Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://docs.blockrazor.io/tc/streams/block-stream/solana/sandwich-detector.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.