Sign Message

The "Sign Message" feature in the KrypC wallet-dev Service API allows users to generate cryptographic signatures for messages, providing a secure way to verify ownership or authorization in decentralized applications. This feature is useful for identity verification and message authentication in blockchain and cryptographic systems.

This will allow to Sign message.

API Specification

Sign Message API

POST https://api.krypcore.com/api/v0/devWallet/signMessage

To sign message API under the given instance.

Headers

Name	Type	Description
DappId*	String	DappId
Authorization*	String	User Auth key obtained
SubscriptionId	String	SubscriptionId
ChainId	String	ChainId

Request Body

Name	Type	Description
privateKey*	String	Private Key
message*	String	Message

200: OK SUCCESS

{
    "Data": {
        "signature": "0x1b5ef0f705318b13cd25e46492897c3d59058334bca7931cd6e01a3a4f9a374671bb93c34e926ffd3c1326be91beda6bc5ecec2813a9bc75ebae4df6a24ac69901"
    },
    "Message": "Signed message successfully",
    "Status": "SUCCESS"
}

401: Unauthorized Failure in authentication

{
    "message": "Invalid API key in request"
}

500: Internal Server Error Key values should be given

{
    "message": "Internal Server Error"
}

Take a look at how you might call this method using our official libraries, or via curl

curl

curl --location 'https://api.krypcore.com/api/v0/devWallet/signMessage' \
--header 'DappId: **********' \
--header 'Authorization: **********' \
--header 'SubscriptionId: ********' \
--header 'ChainId: ********' \
--header 'Content-Type: application/json' \
--data '{
    "privateKey": "**********",
    "message":"Hello"
}'

Node.js (Fetch)

var myHeaders = new Headers();
myHeaders.append("DappId", "**********");
myHeaders.append("Authorization", "**********");
myHeaders.append("SubscriptionId", "********");
myHeaders.append("ChainId", "********");
myHeaders.append("Content-Type", "application/json");

var raw = JSON.stringify({
  "privateKey": "**********",
  "message": "Hello"
});

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

fetch("https://api.krypcore.com/api/v0/devWallet/signMessage", requestOptions)
  .then(response => response.text())
  .then(result => console.log(result))
  .catch(error => console.log('error', error));

Python

import requests
import json

url = "https://api.krypcore.com/api/v0/devWallet/signMessage"

payload = json.dumps({
  "privateKey": "**********",
  "message": "Hello"
})
headers = {
  'DappId': '**********',
  'Authorization': '**********',
  'SubscriptionId': '********',
  'ChainId': '********',
  'Content-Type': 'application/json'
}

response = requests.request("POST", url, headers=headers, data=payload)

print(response.text)

Golang

package main

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

func main() {

  url := "https://api.krypcore.com/api/v0/devWallet/signMessage"
  method := "POST"

  payload := strings.NewReader(`{
    "privateKey": "**********",
    "message":"Hello"
}`)

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

  if err != nil {
    fmt.Println(err)
    return
  }
  req.Header.Add("DappId", "**********")
  req.Header.Add("Authorization", "**********")
  req.Header.Add("SubscriptionId", "********")
  req.Header.Add("ChainId", "********")
  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))
}