为什么我的事务处理器没有收到我通过其余 API 发布的请求？
我在 Golang 中构建了一个客户端和事务处理器 (TP)，这与 XO 示例没有太大区别。我已成功让 TP 在本地运行到 Sawtooth 组件，并从单独的 cli 工具发送批处理列表。目前 TP 中的 apply 方法没有被命中，也没有收到我的任何交易。
编辑：为了尽可能简化和澄清我的问题，我放弃了我的原始源代码，并构建了一个更简单的客户端，为 XO sdk 示例发送事务。*
当我运行我构建的工具时，rest api 成功接收请求，处理并返回 202 响应，但似乎从批处理状态 url 中省略了批处理的 id。检查日志看起来好像验证器从未收到来自 rest api 的请求，如下面的日志所示。
sawtooth-rest-api-default | [2018-05-16 09:16:38.861 DEBUG route_handlers] Sending CLIENT_BATCH_SUBMIT_REQUEST request to validator
sawtooth-rest-api-default | [2018-05-16 09:16:38.863 DEBUG route_handlers] Received CLIENT_BATCH_SUBMIT_RESPONSE response from validator with status OK
sawtooth-rest-api-default | [2018-05-16 09:16:38.863 INFO helpers] POST /batches HTTP/1.1: 202 status, 213 size, in 0.002275 s
下面是我将事务发送到本地实例的整个命令行工具。
package main
import (
"bytes"
"crypto/sha512"
"encoding/base64"
"encoding/hex"
"flag"
"fmt"
"io/ioutil"
"log"
"math/rand"
"net/http"
"strings"
"time"
"github.com/hyperledger/sawtooth-sdk-go/protobuf/batch_pb2"
"github.com/hyperledger/sawtooth-sdk-go/protobuf/transaction_pb2"
"github.com/hyperledger/sawtooth-sdk-go/signing"
)
var restAPI string
func main() {
var hostname, port string
flag.StringVar(&hostname, "hostname", "localhost", "The hostname to host the application on (default: localhost).")
flag.StringVar(&port, "port", "8080", "The port to listen on for connection (default: 8080)")
flag.StringVar(&restAPI, "restAPI", "http://localhost:8008", "The address of the sawtooth REST API")
flag.Parse()
s := time.Now()
ctx := signing.CreateContext("secp256k1")
key := ctx.NewRandomPrivateKey()
snr := signing.NewCryptoFactory(ctx).NewSigner(key)
payload := "testing_new,create,"
encoded := base64.StdEncoding.EncodeToString([]byte(payload))
trn := BuildTransaction(
"testing_new",
encoded,
"xo",
"1.0",
snr)
trn.Payload = []byte(encoded)
batchList := &batch_pb2.BatchList{
Batches: []*batch_pb2.Batch{
BuildBatch(
[]*transaction_pb2.Transaction{trn},
snr),
},
}
serialised := batchList.String()
fmt.Println(serialised)
resp, err := http.Post(
restAPI+"/batches",
"application/octet-stream",
bytes.NewReader([]byte(serialised)),
)
if err != nil {
fmt.Println("Error")
fmt.Println(err.Error())
return
}
defer resp.Body.Close()
fmt.Println(resp.Status)
body, err := ioutil.ReadAll(resp.Body)
fmt.Println(string(body))
elapsed := time.Since(s)
log.Printf("Creation took %s", elapsed)
resp.Close = true
}
// BuildTransaction will build a transaction based on the information provided
func BuildTransaction(ID, payload, familyName, familyVersion string, snr *signing.Signer) *transaction_pb2.Transaction {
publicKeyHex := snr.GetPublicKey().AsHex()
payloadHash := Hexdigest(string(payload))
addr := Hexdigest(familyName)[:6] + Hexdigest(ID)[:64]
transactionHeader := &transaction_pb2.TransactionHeader{
FamilyName: familyName,
FamilyVersion: familyVersion,
SignerPublicKey: publicKeyHex,
BatcherPublicKey: publicKeyHex,
Inputs: []string{addr},
Outputs: []string{addr},
Dependencies: []string{},
PayloadSha512: payloadHash,
Nonce: GenerateNonce(),
}
header := transactionHeader.String()
headerBytes := []byte(header)
headerSig := hex.EncodeToString(snr.Sign(headerBytes))
return &transaction_pb2.Transaction{
Header: headerBytes,
HeaderSignature: headerSig[:64],
Payload: []byte(payload),
}
}
// BuildBatch will build a batch using the provided transactions
func BuildBatch(trans []*transaction_pb2.Transaction, snr *signing.Signer) *batch_pb2.Batch {
ids := []string{}
for _, t := range trans {
ids = append(ids, t.HeaderSignature)
}
batchHeader := &batch_pb2.BatchHeader{
SignerPublicKey: snr.GetPublicKey().AsHex(),
TransactionIds: ids,
}
return &batch_pb2.Batch{
Header: []byte(batchHeader.String()),
HeaderSignature: hex.EncodeToString(snr.Sign([]byte(batchHeader.String())))[:64],
Transactions: trans,
}
}
// Hexdigest will hash the string and return the result as hex
func Hexdigest(str string) string {
hash := sha512.New()
hash.Write([]byte(str))
hashBytes := hash.Sum(nil)
return strings.ToLower(hex.EncodeToString(hashBytes))
}
// GenerateNonce will generate a random string to use
func GenerateNonce() string {
return randStringBytesMaskImprSrc(16)
}
const (
letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
letterIdxBits = 6 // 6 bits to represent a letter index
letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
letterIdxMax = 63 / letterIdxBits // # of letter indices fitting in 63 bits
)
func randStringBytesMaskImprSrc(n int) string {
rand.Seed(time.Now().UnixNano())
b := make([]byte, n)
// A rand.Int63() generates 63 random bits, enough for letterIdxMax letters!
for i, cache, remain := n-1, rand.Int63(), letterIdxMax; i >= 0; {
if remain == 0 {
cache, remain = rand.Int63(), letterIdxMax
}
if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
b[i] = letterBytes[idx]
i--
}
cache >>= letterIdxBits
remain--
}
return string(b)
}