Sign And Submit Gasless Txn

The "Sign and Submit Gasless Transaction" capability in the KrypC wallet-dev Service API empowers users to securely sign transactions and submit them to the blockchain without the need for gas fees, streamlining the process of interacting with decentralized applications and reducing transaction costs.

This Sign and Submit Gasless Transaction using this method.

API Specification

Sign And Submit Gasless Txn API

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

To sign and submit under the given instance.

Headers

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

Request Body

Name	Type	Description
privateKey*	String	Private Key
dAppId*	String	Dapp ID
chainId*	String	Chain ID
to*	String	To Address
contractAbi*	String	ContactAbi
method*	String	Method
params*	String	Params

200: OK SUCCESS

{
  "Status": "SUCCESS",
  "Message": "wallet created successfully",
  "Data": {
    "WalletId": "20775f3e-8be1-4e4c-8c80-xxxxxxxxxxx",
    "Address": "0x688c17c7FF9Def682b04699C31Dxxxxxxxxxxxxx"
  }
}

401: Unauthorized Failure in authentication

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

500: Internal Server Error Key values are missing

{
    "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/signAndSubmitGaslessTx' \
--header 'DappId: **********' \
--header 'Authorization: **********' \
--header 'subscriptionId: ********' \
--header 'Content-Type: application/json' \
--data '{
    "privateKey": "**********",
    "dAppId": "DEV_TT-1_XENO_231_20230921",
    "chainId": 80001,
    "to": "**********",
    "contractAbi": "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",
    "method": "mintNFT",
    "params": []
}'

Node.js (Fetch)

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

var raw = JSON.stringify({
  "privateKey": "**********",
  "dAppId": "DEV_TT-1_XENO_231_20230921",
  "chainId": 80001,
  "to": "**********",
  "contractAbi": "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",
  "method": "mintNFT",
  "params": []
});

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

fetch("https://api.krypcore.com/api/v0/devWallet/signAndSubmitGaslessTx", 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/signAndSubmitGaslessTx"

payload = json.dumps({
  "privateKey": "**********",
  "dAppId": "DEV_TT-1_XENO_231_20230921",
  "chainId": 80001,
  "to": "**********",
  "contractAbi": "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",
  "method": "mintNFT",
  "params": []
})
headers = {
  'DappId': '**********',
  'Authorization': '**********',
  'subscriptionId': '********',
  '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/signAndSubmitGaslessTx"
  method := "POST"

  payload := strings.NewReader(`{
    "privateKey": "**********",
    "dAppId": "DEV_TT-1_XENO_231_20230921",
    "chainId": 80001,
    "to": "**********",
    "contractAbi": "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",
    "method": "mintNFT",
    "params": []
}`)

  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("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))
}