convex 0.0.2

A collection of utility functions for web3 apps

Convex

Ethereum utilities written in Dart.

This library has the following goals:

1. Keep dependencies to a minimum.
2. Written in Effective Dart style.

Cryptographic utilities

Get the keccak of any data

Get the keccak of any bytes data

import "package:convex/convex.dart";

void main() {
    final data = "your-data";
    print(crypto.keccak(data.toBytes()));    
    print(crypto.keccak(data.toBytes(), bits: 128));  
}

Sign arbitary data

Sign any string data with a private key

import "package:nova/nova.dart";

void main() {
  final privateKey = "0x4646464646464646464646464646464646464646464646464646464646464646";
  final data = "your-data";
  crypto.sign(privateKey, data);
}

Type conversions

Quickly convert between different types

import "package:convex/convex.dart";

void main() {
    final privateKey = "0x4646464646464646464646464646464646464646464646464646464646464646";
    print(privateKey.toBigInt());
    // 31786063712204445802548897845522170783250584025862115618674630904133015979590
    print(privateKey.toBytes());
    // [52, 54, 52, 54, 52, 54, ..., 54]

    final privateKeyBigInt = BigInt.from(42);
    print(privateKeyBigInt.toBytes());
    // [16, 146]

    final privateKeyBytes = Uint8List.fromList([16, 146]);
    print(privateKeyBytes.toBigInt());
    // 4242
}

Validate a hex string

import "package:convex/convex.dart";

void main() {
    final privateKeyA = "0x4646464646464646464646464646464646464646464646464646464646464646";
    print(privateKeyA.isValidHex());
    // true

   final privateKeyB = "902MIsam)pp";
    print(privateKeyB.isValidHex());
    // false
}