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Ricardo Guilherme Schmidt 3esmit

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@3esmit
3esmit / GCDLCMCache.sol
Last active October 5, 2018 22:55
hacky gcd lcm solidity with cache
pragma solidity ^0.4.21;
contract GCDLCMCache {
mapping (bytes32 => uint256) public cache;
enum CacheType { GCD, LCM }
function gcd(uint256[] input)
@3esmit
3esmit / UsernameRegistrar.sol
Created October 24, 2018 13:08
pragma solidity ^0.4.24;
/**
* @title MerkleProof
* @dev Merkle proof verification based on
* https://github.com/ameensol/merkle-tree-solidity/blob/master/src/MerkleProof.sol
*/
library MerkleProof {
/**
@3esmit
3esmit / Bar.sol
Last active November 21, 2018 07:06
Created using remix-ide: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at https://remix.ethereum.org/#version=soljson-v0.5.0-nightly.2018.11.13+commit.ac980fb8.js&optimize=true&gist=8954425d2ed0322505245803d6c045e4
contract Bar {
event FooChanged(uint8 num);
uint256 public foo;
constructor() public {
reset();
}
function testAssert(bool _fail) external {
@3esmit
3esmit / phase1.zokrates
Last active December 6, 2018 07:20
import "LIBSNARK/sha256packed"
def hash(field[16] deck) -> (field[2]):
field res = 0
for field i in 0..16 do
res = res + deck[i] * (2**(4*i))
endfor
h0, h1 = sha256packed(0, 0, 0, res)
return [h0, h1]
@3esmit
3esmit / PaymentChannel.sol
Last active December 10, 2018 00:39
Created using remix-ide: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at https://remix.ethereum.org/#version=soljson-v0.5.1+commit.c8a2cb62.js&optimize=false&gist=fce237c187d1f54eacb2c434553b2dd2
pragma solidity >=0.5.0 <0.6.0;
interface Token {
function approve(address _spender, uint256 _value) external returns (bool success);
function allowance(address _owner, address _spender) external view returns (uint256 remaining);
function transferFrom(address _from, address _to, uint256 _value) external returns (bool success);
}
interface PaymentChannel {}
@3esmit
3esmit / embark_install.sh
Last active January 8, 2019 18:35
embark (ethereum development framework) install snippet for ubuntu 18.10
#!/usr/bin/env bash
NVM_LINK="https://raw.githubusercontent.com/creationix/nvm/v0.34.0/install.sh"
GETH_LINK="https://gethstore.blob.core.windows.net/builds/geth-alltools-linux-amd64-1.8.20-24d727b6.tar.gz"
IPFS_LINK="https://dist.ipfs.io/go-ipfs/v0.4.18/go-ipfs_v0.4.18_linux-amd64.tar.gz"
# Install NVM
wget -qO- $NVM_LINK | bash
source ~/.bashrc
@3esmit
3esmit / color-eth-address.css
Created April 9, 2019 04:59
Color(ful) Eth Address React Component
.eth-address {
padding: 3px;
border-radius: 8px;
position: relative;
display: inline-grid;
box-shadow: 1px 1px 1px 1px #CCCC;
border-top: solid 1px #FFFC;
border-left: solid 1px #FFFC;
}
@3esmit
3esmit / config.json
Created October 2, 2019 12:02
Status.im statusd mailserver config (change <your-ip>)
{
"Rendezvous": true,
"ListenAddr": "0.0.0.0:30304",
"AdvertiseAddr": "<your-ip>",
"APIModules": "eth,net,web3,admin",
"NoDiscovery": false,
"WhisperConfig": {
"Enabled": true,
"EnableMailServer": true,
"LightClient": false,
@3esmit
3esmit / MultisigAccount.sol
Last active June 3, 2021 20:24
pragma solidity >=0.5.0 <0.6.0;
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
/**
@3esmit
3esmit / MerkleMultiProof.sol
Last active January 24, 2020 17:22
pragma solidity >=0.5.0 <0.7.0;
/**
* @author Ricardo Guilherme Schmidt (Status Research & Development GmbH)
* @notice simplified multi proofs
*/
library MerkleMultiProof {
/**
* @notice Calculates a merkle root using multiple leafs at same time
* @param leafs out of order sequence of leafs and it's siblings