Sign And Submit Gasless Txn Using (kms wallet)

The "Sign And Submit Gasless Txn Using (kms wallet)" API endpoint allows users to sign and submit a gasless transaction using a Key Management Service (KMS) wallet in a local development environment.

API Specification

Sign And Submit Gasless Txn

POST http://localhost:8888/wallet/signAndSubmitGaslessTxn

Sign And Submit Gasless Txn under the given instance.

Headers

Name	Type	Description
Authorization*	String	User Auth key obtained

Request Body

Name	Type	Description
walletId*	String	The ID associated with the SMW wallet for signing the transaction.
dAppId*	String	Dapp ID associated with the application
chainId*	String	Chain ID representing the blockchain protocol
to*	String	Contract address to which the gasless transaction is being sent
contractAbi*	String	The ABI (Application Binary Interface) of the contract
method*	String	The specific method of the contract for which the gasless transaction is being initiated
params*	String	Parameters required for the specified contract method

200: OK SUCCESS

{
    "Status": "SUCCESS",
    "Message": "Transaction Complete",
    "Data": {
        "message": "Tx submitted to network successfully",
        "txHash": "0x50c7f0b20a758de6759cfadd895d268886043dd52ecaac1ca98axxxxxxxxxxx"
    }
}

401: Unauthorized Failure in authentication

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

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

curl

curl --location 'http://localhost:8888/wallet/signAndSubmitGaslessTxn' \
--header 'Authorization: 03374415-xxxx-xxxx-xxxx-1277d243034e' \
--header 'Content-Type: application/json' \
--data '{
    "walletId": "42d0a078-2a9f-45eb-988e-c35d62xxxxxx",
    "dAppId": "DEV_DEMO_PACE_46_xxxxxxxx",
    "chainId": 80001,
    "to": "0x362149525adee7A0B20212D76Fad073Cxxxxxxxxx",
    "contractAbi": "Base64 of abi",
    "method": "transfer",
    "params": []
}'

Node.js (Fetch)

var myHeaders = new Headers();
myHeaders.append("Authorization", "03374415-xxxx-xxxx-xxxx-1277d243034e");
myHeaders.append("Content-Type", "application/json");

var raw = JSON.stringify({
  "walletId": "42d0a078-2a9f-45eb-988e-c35d62xxxxxx",
  "dAppId": "DEV_DEMO_PACE_46_xxxxxxxx",
  "chainId": 80001,
  "to": "0x362149525adee7A0B20212D76Fad073Cxxxxxxxxx",
  "contractAbi": "Base64 of abi",
  "method": "transfer",
  "params": []
});

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

fetch("http://localhost:8888/wallet/signAndSubmitGaslessTxn", requestOptions)
  .then(response => response.text())
  .then(result => console.log(result))
  .catch(error => console.log('error', error));

Python

import requests
import json

url = "http://localhost:8888/wallet/signAndSubmitGaslessTxn"

payload = json.dumps({
  "walletId": "42d0a078-2a9f-45eb-988e-c35d62xxxxxx",
  "dAppId": "DEV_DEMO_PACE_46_xxxxxxxx",
  "chainId": 80001,
  "to": "0x362149525adee7A0B20212D76Fad073Cxxxxxxxxx",
  "contractAbi": "Base64 of abi",
  "method": "transfer",
  "params": []
})
headers = {
  'Authorization': '03374415-xxxx-xxxx-xxxx-1277d243034e',
  '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 := "http://localhost:8888/wallet/signAndSubmitGaslessTxn"
  method := "POST"

  payload := strings.NewReader(`{`+"
"+`
    "walletId": "42d0a078-2a9f-45eb-988e-c35d62xxxxxx",`+"
"+`
    "dAppId": "DEV_DEMO_PACE_46_xxxxxxxx",`+"
"+`
    "chainId": 80001,`+"
"+`
    "to": "0x362149525adee7A0B20212D76Fad073Cxxxxxxxxx",`+"
"+`
    "contractAbi": "Base64 of abi",`+"
"+`
    "method": "transfer",`+"
"+`
    "params": []`+"
"+`
}`)

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

  if err != nil {
    fmt.Println(err)
    return
  }
  req.Header.Add("Authorization", "03374415-xxxx-xxxx-xxxx-1277d243034e")
  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))
}