區塊鏈交易所基礎開發(5)通過介面查詢區塊鏈各個幣種的提幣情況-eos

程式碼如下

package main

import (
	"errors"
	"fmt"
	"math"
	"strconv"
	"strings"

	"github.com/buger/jsonparser"
	"github.com/levigross/grequests"
)

const min = 0.000000000001

func isEqual(f1, f2 float64) bool {
	if f1 < f2 {
		return isEqual(f2, f1)
	}
	return math.Dim(f1, f2) < min
}

// HTTPGet asfdadsf.
func HTTPGet(url string, requestOptions *grequests.RequestOptions) (response []byte, err error) {
	httpResponse, err := grequests.Get(url, requestOptions)
	if err == nil {
		if httpResponse.StatusCode == 200 {
			response = httpResponse.Bytes()
		}
	}
	return
}

// EosBlocksChainCheck 根據提幣的數量，提幣方地址以及目標方地址來檢查提幣是否已經confirmed.
// 返回值有兩個：提幣狀態以及已收到的提幣數量（扣除手續費）
func EosBlocksChainCheck(withdrawAmount float64, originalAddress string, targetAddress string) (status string, netWithdrawAmount float64, confirmations int64, err error) {
	url := fmt.Sprintf("http://api.etherscan.io/api?module=account&action=txlist&address=%s&startblock=0&endblock=99999999", targetAddress)
	bData, err := HTTPGet(url, nil)
	if err != nil {
		return
	}
	transactions, _, _, err := jsonparser.Get(bData, "result")
	_, err = jsonparser.ArrayEach(transactions, func(value []byte, dataType jsonparser.ValueType, offset int, e error) {
		_from, _, _, e := jsonparser.Get(value, "from")
		_to, _, _, e := jsonparser.Get(value, "to")
		_value, _, _, e := jsonparser.Get(value, "value")
		_txreceiptStatus, _, _, e := jsonparser.Get(value, "txreceipt_status")
		_gasPrice, _, _, e := jsonparser.Get(value, "gasPrice")
		_gasUsed, _, _, e := jsonparser.Get(value, "gasUsed")
		_confirmations, _, _, e := jsonparser.Get(value, "confirmations")

		sf := strings.ToLower(string(_from))
		st := strings.ToLower(string(_to))
		sv := strings.ToLower(string(_value))
		iv, _ := strconv.ParseFloat(sv, 64)
		sts := string(_txreceiptStatus)
		sgp := string(_gasPrice)
		igp, _ := strconv.ParseFloat(sgp, 64)
		sgu := string(_gasUsed)
		igu, _ := strconv.ParseFloat(sgu, 64)
		sc := string(_confirmations)

		if sf == strings.ToLower(originalAddress) && st == strings.ToLower(targetAddress) && isEqual(iv, withdrawAmount) {
			// fmt.Println(sf, st, sv, iv, sgp, igp, sgu, igu, sc)

			// 已完成的提幣數量，未扣除提幣的手續費
			fmt.Println("gas:", igp*igu)
			// 已收到幣的實際數量，扣除了提幣的手續費
			fmt.Println("net_receive_amount:", iv)
			if sts == "" || sts == "1" {
				status = "confirmed"
			} else {
				status = "online"
			}
			netWithdrawAmount = iv
			confirmations, _ = strconv.ParseInt(sc, 10, 64)
		} else {
			e = errors.New("this is a new error")
		}
	})
	return
}

func main() {
	status, netReceiveAmount, confirmations, err := EosBlocksChainCheck(5000000000000000000, "0xa7652b40a9c9b392ab240cbcfb44885fc7c23271", "0x9e544993e4503a98b690dd4fb05492d79c1507f5")
	if err != nil {
		fmt.Println("request failed...")
		return
	}
	fmt.Println(fmt.Sprintf("status: %s, net_withdraw_amount: %f, confirmations: %d", status, netReceiveAmount, confirmations))
}

執行效果

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