furusiyya

//
// The new assembly support in Solidity makes writing helpers easy.
// Many have complained how complex it is to use `ecrecover`, especially in conjunction
// with the `eth_sign` RPC call. Here is a helper, which makes that a matter of a single call.
//
// Sample input parameters:
// (with v=0)
// "0x47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad",
// "0xaca7da997ad177f040240cdccf6905b71ab16b74434388c3a72f34fd25d6439346b2bac274ff29b48b3ea6e2d04c1336eaceafda3c53ab483fc3ff12fac3ebf200",
// "0x0e5cb767cce09a7f3ca594df118aa519be5e2b5a"

furusiyya

Setup should be followed one section after another.

For example you may need to set up 2 miners and 2 non-miners. You follow once through, (assuming it's tabula rasa state) Starting new Network, then Adding mining/signing node to existing network, then twice Adding non mining/signing node to existing network, after you've done it you should manually (for the purpose of testing) run: firstly run bootnode, then all other nodes. If you see that everyone is in sync (block mining appears on every one of them) you can prepare services for each of them.

Starting new network

Creating workplace

We will create a folder /home/cryptodaemon/poaGethNode and folder for blockchain database /home/cryptodaemon/poaGethNode/node mkdir -p /home/cryptodaemon/poaGethNode/node
Download PoA Geth binary and put it into /home/cryptodaemon/poaGethNode

Rename binary to geth

(warning) If you doing adding just another node, you do should skip this.

furusiyya

Merged Pull Requests

1- Connection Timeout Added

Issues Resolved: #72, #59
Description Glutton support number of services (protocol handlers) so each service mean number of connection on that service. So It crash after some time with error: [user.tcp] accept tcp [::]:5000: accept4: too many open files, and this error was due to the allowance of limited number of open file descriptors by the operating system. There was no deadline set for opened connections so most of the connections never get closed. In result, the number of opened connections gradually cross the maximum open file descriptors limit and cause panic. So I added connection timeout = 72 second, number of opened connection will never reach the open file descriptor limit. Another reason was Freki; Glutton useses freki as a networking core so frek

furusiyya

• Write contracts
• Study zeppelin in depth and then learn to test for this: logic bugs, failed sends, recursive calls, overflow, poison data, exposed functions, exposed secrets, dust spam, replay attack, miner vulnerabilities, malicious creator, off-chain safety, cross-chain attacks, tx-origin problems, stack depth exhaustion, etc.
• http://hackthiscontract.io/dashboard?address=ggg
• https://medium.com/@rtaylor30/how-i-snatched-your-153-037-eth-after-a-bad-tinder-date-d1d84422a50b

furusiyya

pragma solidity ^0.4.16;

contract ReentrancyGuard {

  event ReentrancyAttemp(address senderAddress);

  /**
   * @dev We use a single lock for the whole contract.
   */
  bool private rentrancy_lock = false;

furusiyya

/**
 *  NotaryPlatformToken.sol v1.0.0
 * 
 *  Bilal Arif - https://twitter.com/furusiyya_
 *  Notary Platform
 */

pragma solidity ^0.4.16;

furusiyya

        bonuses[0x017ABCC1012A7FfA811bBe4a26804f9DDac1Af4D] = true;
        bonuses[0x1156ABCBA63ACC64162b0bbf67726a3E5eA1E157] = true;
        bonuses[0xEAC8483261078517528DE64956dBD405f631265c] = true;
        bonuses[0xB0b0D639b612937D50dd26eA6dc668e7AE51642A] = true;
        bonuses[0x417535DEF791d7BBFBC97b0f743a4Da67fD9eC3B] = true;
        bonuses[0x6723f81CDc9a5D5ef2Fe1bFbEdb4f83Bd017D3dC] = true;
        bonuses[0xb9Bd4f154Bb5F2BE5E7Db0357C54720c7f35405d] = true;
        bonuses[0x21CA5617f0cd02f13075C7c22f7231D061F09189] = true;
        bonuses[0x0a6Cd7e558c69baF7388bb0B3432E29Ecc29ac55] = true;
        bonuses[0x6a7f63709422A986A953904c64F10D945c8AfBA1] = true;

furusiyya

Beta Application Smart Contracts

Notary Platform Token Contract: https://rinkeby.etherscan.io/address/0x26583673d43e8646fe792d62c84fa6811de8276a#code
Car Contract: https://rinkeby.etherscan.io/address/0xd5a2378b5c7d2381a5f6fd1faaef47a736b757cd#code
Notary Mapper: https://rinkeby.etherscan.io/address/0x0c84290a98362c96be7e9fb44ea543b47d723223#readContract

ICO Smart Contracts

Crowdfunding Contracts: https://etherscan.io/address/0x34a3deb32b4705018f1e543a5867cf01aff3f15b#code Notary Platform Token: https://etherscan.io/address/0xf92698aa5cf655B092D98548b292bB150998888D#readContract

furusiyya

Verifying that "furusiyya.id" is my Blockstack ID. https://onename.com/furusiyya

furusiyya

You have to create a smart contract in solidity language and deploy it on ethereum testnet. Smart contract will represent an ERC20 token that have only one function used for transferring tokens. Solidity: https://solidity.readthedocs.io