Nova

Nova can be used to generate eth wallets, sign transaction, and send them. It also implements some cryptographic functions, convenient types conversion extensions, and part of the Ethereum JSON-RPC API specification.

Account

The library has built-in support for managing ethereum private keys, and signatures. It provides functionality for generating, signing, and sending transactions.

Generate a Account

Generate a new account with a seed phrase

import "package:nova/nova.dart";

void main() {
  // Generate a seed phrase
  final seedPhrase = Cryptography.generateMnemonic();

  // Derive a private key from the seed phrase
  final privateKey = Cryptography.derivePrivateKey(seedPhrase);
  
  // Instantiate an Account object to sign and send transactions
  final account = Account(privateKey, "ws://your-websocket.com");
}

Use your own seed phrase or private key

Load an Account with a seed phrase

import "package:nova/nova.dart";

void main() {
  // Your seed phrase
  final seedPhrase = "seed sock milk update focus rotate barely fade car face mechanic mercy"

  // The seed phrase private key
  final privateKey = Cryptography.derivePrivateKey(seedPhrase);
  
  // Instantiate an Account object to sign and send transactions
  final account = Account(privateKey, "ws://your-websocket.com");
}

Sign a Transaction

Generate a signed transaction

import 'dart:math';
import "package:nova/nova.dart";

void main() async {
  final account = Account(
    "0x4646464646464646464646464646464646464646464646464646464646464646",
    "ws://xyz.com",
  );

  final signedTransaction = await account.sign(
    nonce: BigInt.from(9),
    to: "0x3535353535353535353535353535353535353535",
    gasLimit: BigInt.from(21000),
    gasPrice: BigInt.from(20 * pow(10, 9)),
    value: BigInt.from(pow(10, 18)),
    chainId: 1,
  );
}

Send a Transaction

Sign and send a transaction.

import 'dart:math';
import "package:nova/nova.dart";

void main() async {
   final account = Account(
    "0x4646464646464646464646464646464646464646464646464646464646464646",
    "ws://xyz.com",
  );

  final signedTransaction = await account.send(
    nonce: BigInt.from(9),
    to: "0x3535353535353535353535353535353535353535",
    gasLimit: BigInt.from(21000),
    gasPrice: BigInt.from(20 * pow(10, 9)),
    value: BigInt.from(pow(10, 18)),
    chainId: 1,
  );
}

Cryptography