points-nft

Points to NFT

This example mainly demonstrates how to use a traditional centralized service provider to dock to W3BStream

First of all, there is a traditional centralized service provider, which provides customers with an incentive. If customers accumulate 1000 points at the service provider, then the service provider will issue a NFT to the user.

Send data

In this example, a relatively simple data structure is used, and a json format string is sent, which contains only points and account

{
    "Points": 2000,
    "Account":"YOUR ACCOUNT ADDRESS WITHOUT 0x"
}

Please note that the data you want to send must contain Account and there is no 0x

curl

curl --location --request POST 'http://localhost:8888/srv-applet-mgr/v0/event/project_01' \
--header 'event_type: 2147483647' \
--header 'Content-Type: application/json' \
--data-raw '{
    "payload":"{\"Points\":2000,\"Account\":\"9117f5EF4156709092f79740a97b1638cA399A00\"}"
}'

javascript

var myHeaders = new Headers();
myHeaders.append("event_type", "2147483647");
myHeaders.append("Content-Type", "application/json");

var raw = JSON.stringify({
  "payload": "{\"Points\":2000,\"Account\":\"9117f5EF4156709092f79740a97b1638cA399A00\"}"
});

var requestOptions = {
  method: 'POST',
  headers: myHeaders,
  body: raw,
  redirect: 'follow'
};

fetch("http://localhost:8888/srv-applet-mgr/v0/event/project_01", requestOptions)
  .then(response => response.text())
  .then(result => console.log(result))
  .catch(error => console.log('error', error));

go

package main

import (
  "fmt"
  "strings"
  "net/http"
  "io/ioutil"
)

func main() {

  url := "http://localhost:8888/srv-applet-mgr/v0/event/project_01"
  method := "POST"

  payload := strings.NewReader(`{`+"
"+`
    "payload":"{\"Points\":2000,\"Account\":\"9117f5EF4156709092f79740a97b1638cA399A00\"}"`+"
"+`
}`)

  client := &http.Client {
  }
  req, err := http.NewRequest(method, url, payload)

  if err != nil {
    fmt.Println(err)
    return
  }
  req.Header.Add("event_type", "2147483647")
  req.Header.Add("Content-Type", "application/json")

  res, err := client.Do(req)
  if err != nil {
    fmt.Println(err)
    return
  }
  defer res.Body.Close()

  body, err := ioutil.ReadAll(res.Body)
  if err != nil {
    fmt.Println(err)
    return
  }
  fmt.Println(string(body))
}

Send data use esp32

You can refer this doc README.md

Receive data

After receiving the data, applet will output the following log to docker. Your account will mint an erc721 token.

There is the erc721 token contract address on IoTeX testnet 0xd6E9f94FD0247157d947fd18BfEbf204b5156d1F

Check NFT

You can check it in spoon