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
}

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
}

// XmrBlocksChainCheck 根据提币的数量，提币方地址以及目标方地址来检查提币是否已经confirmed.
// 返回值有两个：提币状态以及已收到的提币数量（扣除手续费）
func XrpBlocksChainCheck(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)

            // 已完成的提币数量，未扣除提币的手续费
            fmt.Println("gas:", igp*igu)
            // 已收到币的实际数量，扣除了提币的手续费
            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 := XrpBlocksChainCheck(53000000000000000, "0x8a62f1bad85d968c218abf0f44156a48f4b5512c", "0xf24246e0d5399ea85dbdadcfdbc9e8f14490db58")
    if err != nil {
        fmt.Println("request failed...")
        return
    }
    fmt.Println(fmt.Sprintf("status: %s, net_withdraw_amount: %f, confirmations: %d", status, netReceiveAmount, confirmations))
}

效果如下：