Lohann

// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.0 <0.9.0;

/**
 * Workaround example on how to inject and execute arbitrary bytecode in solidity contract
 * Currently only YUL supports verbatim: https://github.com/ethereum/solidity/issues/12067
 * But you cannot import Solidity code in YUL, or YUL code in solidity, so this workaround is necessary.
 * It works as long the byte sequence `7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E` appear once in the runtime code.
 *
 * Example: ADD two numbers.

Lohann

// Gas efficient SQRT method, computes floor(sqrt(x)).
// Constant gas cost of 355
// 
// For testing use this tool: https://www.evm.codes/playground?fork=cancun
// Author: Lohann Ferreira
PUSH0
CALLDATALOAD
PUSH1 1
DUP2

Lohann

"""
-- requirements.txt
bip_utils==2.9.1
mnemonic==0.21
"""
from mnemonic import Mnemonic
from bip_utils import Bip44, Bip44Changes, Bip44Coins

mnemonic = "bottom drive obey lake curtain smoke basket hold race lonely fit walk"
passphrase = "password here"

Lohann

import hashlib
from random import SystemRandom
from collections import namedtuple

'''
FROST: Flexible Round-Optimized Schnorr Threshold Signatures

Implementation based in this paper:
https://eprint.iacr.org/2020/852.pdf
'''

Lohann

// [dependencies]
// blake2b_simd = "1.0.1"
// num-bigint = "0.4.3"
// num-integer = "0.1.45"
// num-prime = { version = "0.4.3", features=["num-bigint"] }
// num-traits = "0.2.15"

use blake2b_simd;
use num_bigint::{BigInt, BigUint, Sign};
use num_integer::Integer;

Lohann

// "dependencies": {
//    "axios": "^1.3.6"
// }
const axios = require('axios');

const CLIENT_ID = '<client_id_aqui>';

async function run(token) {
    console.log(token);
}

Lohann

const webcrypto = require('crypto').webcrypto.subtle;

const enc = new TextEncoder();

function bytesToBase64url(bytes) {
    return Buffer.from(bytes).toString('base64url');
}

function jsonToBase64url(obj) {
    const bytes = enc.encode(JSON.stringify(obj));

Lohann

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;

library ECDSA {
    /**
     * @notice Recovers the address for an ECDSA signature and message hash,
     * note that the hash must be prefixed with "\x19Ethereum Signed Message:\n{msg.length}"
     * @return address The address that was used to sign the message
     */

Lohann

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;

contract Lottery {

    // PRICE PER TICKET
    uint256 constant TICKET_PRICE = (10 ** 18) / 100; // 0.01eth
    uint256 constant TICKET_OPTIONS = 30;
    uint256 constant OPTIONS_PER_TICKET = 3;

Lohann

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;

library Vote {
    uint256 constant BITS_PER_CANDIDATE = 5;
    uint256 constant BITMASK = (2**BITS_PER_CANDIDATE) - 1;

    // Storage Layout:
    // Voter (160bit) | size (5bit) | votes (5~90bit)