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tbkcustom.go
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tbkcustom.go
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package main
import (
"bytes"
"encoding/csv"
"encoding/json"
// "errors"
"fmt"
"log"
"net/http"
"os"
"strconv"
"time"
// "net/url"
"bufio"
)
// One fee in the JSON response
type AutoGenerated struct {
Data []Stat `json:"data"`
}
type Stat struct {
Timestamp int //`json:"num_int"`
FeeJ json.Number `json:"num_float"`
}
//JSON unmarshaller, do not change
func (s *Stat) UnmarshalJSON(data []byte) error {
var tmp []int
if s.Timestamp < 6000 {
json.Unmarshal(data, &tmp)
}
s.Timestamp = tmp[0]
var blk []json.Number
if err := json.Unmarshal(data, &blk); err != nil {
return err
}
s.FeeJ = blk[1]
return nil
}
func main() {
var inType string
var inInterval string
var inDate string
var inRuns int
fmt.Println("Enter 1, 2, 3, or 4 for data type: \n" +
"1 - txsize_new - sum size of all tx for selected interval \n" +
"2 - txfee_new - sum of all tx fees for interval (in satoshis) \n" +
"3 - txes_new - total number of txs for interval \n" +
"4 - blocks_new total blocks mined for interval \n")
scn := bufio.NewScanner(os.Stdin)
scn.Scan()
line := scn.Text()
if line == "1" {
inType = "txsize_new"
} else if line == "2" {
inType = "txfee_new"
} else if line == "3" {
inType = "txes_new"
} else if line == "4" {
inType = "blocks_new"
}
fmt.Println("\nEnter interval to query: 1h, 2h, 6h, 1d \n" +
"interval must be entered as '1h' '2h' '6h' or '1d' NO OTHER intervals are permitted")
fmt.Scanf("%s", &inInterval)
fmt.Printf("\nEnter ending date value to pull: 86400=24hours \n")
t := time.Now()
utime := t.Unix()
fmt.Println("Current time is: ", t.Unix())
fmt.Println(" if ", utime, "is entered with interval at 6h then 1000 records will \n" +
"be retrieved starting at ", utime-21600000)
// var currentTimestamp int
fmt.Scanf("%s", &inDate)
fmt.Println("\nNumber of instances back to run?")
fmt.Println(" '3' with 1h interval and ending date at ", utime, " will retrieve the 3000 \n" +
" hour values prior to ", utime)
var instChecker int
fmt.Scanf("%v", &instChecker)
for ; instChecker > 10; {
fmt.Println("Please enter integer between 1-10")
fmt.Scanf("%v", &instChecker)
}
inRuns = instChecker
time.Sleep(2000 * time.Millisecond)
//creation of CSV file
ruffer := filenamer(inType, inInterval)
xx := ruffer.String()
Filecsv, err := os.Create(xx)
fmt.Println("csv okay")
if err != nil {
fmt.Println("Cannot create")
}
defer Filecsv.Close()
currentTimestamp, err := strconv.Atoi(inDate)
if err != nil {
log.Fatalf("date conversion to int failed", err)
}
urls := make([]string, 0)
//creates URLS and writes different URLs as slices to 'urls'
for i := 0; i <= inRuns; i++ {
fmt.Println("making URL slices")
lurl := fmt.Sprintf("https://tradeblock.com/api/blockchain/statistics/%s/%s/%d", inType,
inInterval, currentTimestamp)
urls = append(urls, lurl)
if inInterval == "1h" {
currentTimestamp -= 3600000
} else if inInterval == "2h" {
currentTimestamp -= 7200000
} else if inInterval == "6h" {
currentTimestamp -= 21600000
} else if inInterval == "1d" {
currentTimestamp -= 86400000
}
}
fmt.Println(urls[0])
//carries out execution of decoder and reader/writer
dataset := make([]Stat, 0, len(urls)*1)
fmt.Println("dataset made okay")
for _, lurl := range urls {
Currentdat := reader(inRuns, lurl)
dataset = append(dataset, Currentdat.Data...)
fmt.Println("appending...")
}
fmt.Println("trying write...")
writes(dataset, Filecsv)
fmt.Println("write done!")
}
//decodes retrieved JSON data for each URL
func reader(inRuns int, urls ...string) (Currentdat AutoGenerated) {
i := 0
response, err := http.Get(urls[i])
if err != nil {
log.Fatalf("failed to get JSON data: %v", err)
}
// defer response.Body.Close()
dec := json.NewDecoder(response.Body)
dec.UseNumber()
Currentdat = AutoGenerated{}
err = dec.Decode(&Currentdat)
if err != nil {
log.Fatalf("Failed to decode the JSON body: %v", err)
}
noter := string("looks good")
fmt.Println(noter, i)
i += 1
return Currentdat
}
//takes decoded JSON and writes to CSV
func writes(dataset []Stat, Filecsv *os.File) {
csvw := csv.NewWriter(Filecsv)
fmt.Println("starting write...")
var counter int = 1
for _, Fee := range dataset {
eqAa := "=(A"
datecol2 := string("/24/60/60)+DATE(1970,1,1)")
counter = counter + 1
numFee := Fee.FeeJ.String()
record := []string{strconv.Itoa(Fee.Timestamp), numFee, eqAa + strconv.Itoa(counter) + datecol2}
csvw.Flush()
csvw.Write(record)
if err := csvw.Error(); err != nil {
log.Fatalf("Could not write to CSV file:", err)
}
}
return
}
//ugly timestamper for filename
func filenamer(inType, inInterval string) (bytes.Buffer) {
hour, min := time.Now().Hour(), time.Now().Minute()
_, month, day := time.Now().Date()
h := strconv.Itoa(hour)
n := strconv.Itoa(min)
d := strconv.Itoa(day)
m := strconv.Itoa(int(month))
var zuffer bytes.Buffer
zuffer.WriteString(inType)
zuffer.WriteString(inInterval)
zuffer.WriteString("-")
zuffer.WriteString(m)
zuffer.WriteString("-")
zuffer.WriteString(d)
zuffer.WriteString("at")
zuffer.WriteString(h)
zuffer.WriteString(n)
zuffer.WriteString(".csv")
return zuffer
}