> For the complete documentation index, see [llms.txt](https://docs.blockrazor.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.blockrazor.io/tc/streams/mempool/bsc/public-mempool.md). # Public Mempool ### BSC Public Mempool是什麼 Public Mempool 是 BlockRazor 基于 [BEF](/tc/he-xin-ji-shu/blockchain-edge-fabric.md) 提供的高性能 pending 交易數據流服務，用於低延遲訂閱公開傳播中的未確認交易。 在 EVM 網絡中，交易在進入區塊之前，通常會先在 Mempool 中傳播。Public Mempool 可以幫助用戶更早獲取公開的 pending 交易信號，並將這些信號以更低延遲接入自己的策略系統。它常用於監控公開交易活動、跟蹤 Smart Money 行為、識別新機會，以及為 backrun、copy trading、sniping 等策略提供更快的信號輸入。對於依賴 pending 信號驅動交易決策的系統來說，更早看到交易，往往意味著： * 更早進入策略判斷流程 * 更充足的時間完成參數計算與風險控制 * 更高概率在競爭場景中獲得更優執行位置 ### BSC Public Mempool的應用場景 * **Pending交易監控：**實時監控公開傳播中的 pending 交易，用於識別活躍地址、熱門合約或異常交易行為 * **Smart Money追蹤：**盡早跟蹤目標地址的交易活動，為 copy trading 或策略跟隨提供信號輸入 * **Backrun機會發現：**發現可能觸發 backrun 機會的公開交易，為後續策略判斷和交易提交爭取更多時間 * **Sniping機會發現：**在新池上線、流動性注入或目標交易出現時，盡早捕捉公開市場中的首輪信號 * **策略實時數據輸入**：作為交易系統的實時輸入源，與 Block Stream、Node Stream、RPC 或 Block Builder 等能力配合使用，構建更完整的監控與執行鏈路 ### Benchmark 在接收交易的延遲測試中，我們分別在 Dublin、Frankfurt、Tokyo 和 Virginia 四個區域，對 BlockRazor 與普通 Node 進行了對比。評估方式基於雙方對同一筆交易的首次接收時間差，統計在可比樣本中由哪一方更早收到交易。
RegionBlockRazor Lead RateAvg LeadP90 Lead
Dublin84.0%102.4 ms221.0 ms
Frankfurt99.7%30.4 ms67.7 ms
Tokyo99.9%148.6 ms264.4 ms
Virginia99.7%62.0 ms190.7 ms
從結果來看，BlockRazor 在四個區域均保持了明顯領先。Frankfurt、Tokyo 和 Virginia 三個區域的交易接收領先率均超過 99%，Dublin 區域的領先率為 84.0%。從領先幅度看，BlockRazor 在不同區域的平均領先時間約為 102.4ms、30.4ms、148.6ms 和 62.0ms；在 P90 維度下，領先幅度分別達到 221.0ms、67.7ms、264.4ms 和 190.7ms。 以上結果表明，BlockRazor 在交易傳播鏈路上展現出穩定的優先接收能力，能夠在絕大多數可比樣本中早於普通 Node 捕獲交易。 ### 端點
地區可用區（AWS）Relay地址
法蘭克福euc1-az264.130.47.75:50051
東京apne1-az463.254.162.18:50051
都柏林euw1-az1141.98.217.82:50051
弗吉尼亞use1-az4208.91.105.204:50051
### 價格 每月每條數據流的價格為$300，請前往[訂閱](https://blockrazor.io/#/pricing)頁面採購。 {% hint style="info" %} 數據流的可訂閱數量按所有地區共享計算。比如購買 1 條，則僅可在 1 個地區訂閱，其他地區將無法訂閱。 {% endhint %} ### 請求參數
參數必選格式示例備注
NodeValidation是booleanfalse該字段目前僅支持設置為false，relay會以更低延遲推送全部新交易（未經校驗）
### 請求示例 {% tabs %} {% tab title="Go" %} ```go package main import ( "context" "fmt" // directory of the generated code using the provided relay.proto file pb "github.com/BlockRazorinc/relay_example/protobuf" "github.com/ethereum/go-ethereum/core/types" "github.com/ethereum/go-ethereum/rlp" "google.golang.org/grpc" ) // auth will be used to verify the credential type Authentication struct { apiKey string } func (a *Authentication) GetRequestMetadata(context.Context, ...string) (map[string]string, error) { return map[string]string{"apiKey": a.apiKey}, nil } func (a *Authentication) RequireTransportSecurity() bool { return false } func main() { // BlockRazor relay endpoint address blzrelayEndPoint := "ip:port" // auth will be used to verify the credential auth := Authentication{ "your auth token", } // open gRPC connection to BlockRazor relay var err error conn, err := grpc.Dial(blzrelayEndPoint, grpc.WithInsecure(), grpc.WithPerRPCCredentials(&auth), grpc.WithWriteBufferSize(0), grpc.WithInitialConnWindowSize(128*1024)) if err != nil { fmt.Println("error: ", err) return } // use the Gateway client connection interface client := pb.NewGatewayClient(conn) // create context and defer cancel of context ctx, cancel := context.WithCancel(context.Background()) defer cancel() // create a subscription using the stream-specific method and request stream, err := client.NewTxs(ctx, &pb.TxsRequest{NodeValidation: false}) if err != nil { fmt.Println("failed to subscribe new tx: ", err) return } for { reply, err := stream.Recv() if err != nil { fmt.Println("stream recieve error: ", err) } tx := &types.Transaction{} err = rlp.DecodeBytes(reply.Tx.RawTx, tx) if err != nil { continue } fmt.Println("recieve new tx, tx hash is ", tx.Hash().String()) } } ``` {% endtab %} {% endtabs %} #### Proto The code of `relay.proto` is as follows: ``` syntax = "proto3"; package blockchain; option go_package = "/Users/code/relay/grpcServer"; service Gateway { rpc SendTx (SendTxRequest) returns (SendTxReply) {} rpc SendTxs (SendTxsRequest) returns (SendTxsReply) {} rpc NewTxs (TxsRequest) returns (stream TxsReply){} rpc NewBlocks (BlocksRequest) returns (stream BlocksReply){} } message TxsRequest{ bool node_validation = 1; } message Tx{ bytes from = 1; int64 timestamp = 2; bytes raw_tx = 3; } message TxsReply{ Tx tx = 1; } message BlocksRequest{ bool node_validation = 1; } message BlockHeader{ string parent_hash = 1; string sha3_uncles = 2; string miner = 3; string state_root = 4; string transactions_root = 5; string receipts_root = 6; string logs_bloom = 7; string difficulty = 8; string number = 9; uint64 gas_limit = 10; uint64 gas_used = 11; uint64 timestamp = 12; bytes extra_data = 13; string mix_hash = 14; uint64 nonce = 15; uint64 base_fee_per_gas = 16; string withdrawals_root = 17; uint64 blob_gas_used = 18; uint64 excess_blob_gas = 19; string parent_beacon_block_root = 20; } message NextValidator{ string block_height = 1; string coinbase = 2; } message BlocksReply{ string hash = 1; BlockHeader header = 2; repeated NextValidator nextValidator = 3; repeated Tx txs = 4; } message Transaction { string content = 1; } message Transactions { repeated Transaction transactions = 1; } message SendTxRequest { string transaction = 1; } message SendTxsRequest { string transactions = 1; } message SendTxReply { string tx_hash = 1; } message SendTxsReply { repeated string tx_hashs = 1; } ``` ### 返回示例 **正常** ```json { "tx":[ { "raw_tx":"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" } ] } ``` **异常** ``` rpc error: code = Unknown desc = data streams have exceeded its max limit [5] ``` --- # Agent Instructions This documentation is published with GitBook. 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