繼昨天說完Elrond Hyper block的內容後，要開始來寫呼叫函式，在這之前必須先優化一下json那邊的寫法，主要是ioutil.ReadAll可能會有檔案越大消能越差甚至可能撐爆記憶體的風險，所以這邊來改寫一下，
原先是

defer func(Body io.ReadCloser) {
		err := Body.Close()
		if err != nil {

		}
	}(resp.Body)
	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		// handle error
	}

	fmt.Println(string(body))
	err = json.Unmarshal(body, &model)
	if err != nil {
		return
	}

使用json的Decoder來處理

defer func(Body io.ReadCloser) {
		err := Body.Close()
		if err != nil {

		}
	}(resp.Body)
	decoder := json.NewDecoder(resp.Body)

	err = decoder.Decode(&model)
	if err != nil {
		return
	}

執行一下確認運行正常，

新增hyperblock的model，model/hyperblockRes.go

package model

type HyperBlockRes struct {
	Code string         `json:"code"`
	Data HyperBlockInfo `json:"data"`
}

type HyperBlockInfo struct {
	HyperBLock HyperBLock `json:"hyperblock"`
}

type HyperBLock struct {
	Hash                   string        `json:"hash"`
	PrevBlockHash          string        `json:"prevBlockHash"`
	StateRootHash          string        `json:"stateRootHash"`
	Nonce                  int           `json:"nonce"`
	Round                  int           `json:"round"`
	Epoch                  int           `json:"epoch"`
	NumTxs                 int           `json:"numTxs"`
	AccumulatedFees        string        `json:"accumulatedFees"`
	DeveloperFees          string        `json:"developerFees"`
	AccumulatedFeesInEpoch string        `json:"accumulatedFeesInEpoch"`
	DeveloperFeesInEpoch   string        `json:"developerFeesInEpoch"`
	Timestamp              int           `json:"timestamp"`
	ShardBlocks            []ShardBlock  `json:"shardBlocks"`
	Transactions           []Transaction `json:"transactions"`
	Status                 string        `json:"status"`
}

type ShardBlock struct {
	Hash  string `json:"hash"`
	Nonce int    `json:"nonce"`
	Round int    `json:"round"`
	Shard int    `json:"shard"`
}

type Transaction struct {
	Type                        string   `json:"type"`
	ProcessingTypeOnSource      string   `json:"processingTypeOnSource"`
	ProcessingTypeOnDestination string   `json:"processingTypeOnDestination"`
	Hash                        string   `json:"hash"`
	Nonce                       int      `json:"nonce"`
	Round                       int      `json:"round"`
	Epoch                       int      `json:"epoch"`
	Value                       string   `json:"value"`
	Receiver                    string   `json:"receiver"`
	Sender                      string   `json:"sender"`
	GasPrice                    int      `json:"gasPrice"`
	Data                        string   `json:"data"`
	PreviousTransactionHash     string   `json:"previousTransactionHash"`
	OriginalTransactionHash     string   `json:"originalTransactionHash"`
	SourceShard                 int      `json:"sourceShard"`
	DestinationShard            int      `json:"destinationShard"`
	MiniblockType               string   `json:"miniblockType"`
	MiniblockHash               string   `json:"miniblockHash"`
	Status                      string   `json:"status"`
	Tokens                      []string `json:"tokens"`
	EsdtValues                  []string `json:"esdtValues"`
	Operation                   string   `json:"operation"`
	InitiallyPaidFee            string   `json:"initiallyPaidFee"`
}

然後在nodeUtils.go 新增GetHyperBlock

func GetHyperBlock(nonce string) {
	var hyperBlockRes model.HyperBlockRes
	utils.HttpGet(url+"/hyperblock/by-nonce/"+nonce+"?withTxs=true", &hyperBlockRes)
	fmt.Println(hyperBlockRes)
	fmt.Printf("transactions: %d\n", hyperBlockRes)
}

執行一下看結果，確認有存取到hyperblock了。

nodeUtils.GetHyperBlock("1131724")