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Ethereum Token

How To Issue Your Own Token On Ethereum In Less Than 20minutes.

How To Issue Your Own Token On Ethereum In Less Than 20minutes.

Living The Crypto Future | Building Tenzorum | Making Blockchain Accessible to Everyone. The only way to survive a mad world, is to embrace the madness. How to issue your own token on Ethereum in less than 20minutes. Alright bro, are you telling me that I can issue my own Token, make an ICO, get gazilions of dollars and live the crypto-dream in less than 20 minutes? The answer is yes, but hopefully you will do better than that. With the latest news about the Blockchain, Bitcoin, Ethereum, cryptocurrencies, and ICO popping up left, right and center, this Blockchain business is garnering quite a lot of attention. So Ive put together a tutorial so that you can understand the technology much better and you can become a part of the booming crypto-economy! This is the first of a series of tutorials to help people better understand how to leverage Blockchain technologies and crypto-currencies to build meaningful applications and nurture the network. In this tutorial my objective is to walk you through the steps of setting up your account through to issuing your first token on the Ethereum network using a single smart contract and MyEtherWallet . The token will be a standard ERC20, it will have the main functions and can be used as a general base for more sophisticated applications than just transferring them (many half-serious ICOs have extremely similar contracts) WARNING: With great powers come great responsibilities. Im not responsible for you not being cautious with your ETH, or using these powers for the evil side of force. I truly hope you do good and feel empowered by the potential that this technology puts in the hands of people. There are a few different components you will need in order to build your own token. For this tutorial we will use a test network to issue t Continue reading >>

What Is Token Compatible Ethereum Wallet List?

What Is Token Compatible Ethereum Wallet List?

List of Ethereum wallets that you can use to store your tokens and participate token sales To participate Ethereum token sale you need a wallet website or a wallet app where you and you only holds the private keys. Private keys are needed to correctly interact with smart contract functions, like transferring tokens. DO NOT PARTICIPATE TO TOKEN SALES DIRECLY FROM CRYPTOCURRENCY EXCHANGE ADDRESSES. YOU NEED A TOKEN COMPATIBLE ETHEREUM WALLET. The following wallets are known to be compatible with Ethereum tokens (ERC-20 standard): Continue reading >>

How To Watch And Send Ethereum Tokens

How To Watch And Send Ethereum Tokens

There are many ways to store Ether and other custom tokens on the Ethereum blockchain. Mist, for example, allows you to run a full node and to watch and send any ETH token. It does, however, require you to keep a full copy of the blockchain. You can also keep them on special wallets built by the projects themselves like the Singular-DTV or Gnosis wallet. MyEtherWallet , however, provides an extremely simple and safe way to watch and interact with your Ethereum-based tokens. We are going to show you how to use this service with any ETH token. In this guide, we assume you have already created your wallet with MyEtherWallet or with another wallet software like Mist or Geth. We have already covered how to create and use MyEtherWallet for Ethereum. So if youre not sure how to create a wallet, read this guide. Now, lets see how we can watch and send tokens on our wallet. Step 3: Now, we have to open our wallet with our private key. In this step, you have to choose how you would like to access your wallet. In our case, were going to choose the Keystore File (UTC / JSON) but it depends on how you have saved your private key Step 4: Since we chose the UTC/JSON method, we need to upload our encrypted private key. Click Select Wallet File Step 5: Choose your private key and click Open Step 7: Click Unlock to open your wallet. Your wallet will be opened and all info revealed. If you have ETH or known tokens, MyEtherWallet will display them on the left side of the wallet You can check all available tokens by clicking Show All Tokens If your token is not on the list, then its time to add it Although the most popular tokens are already available, its very easy to add a token that isnt on the list, if you have the contract address of the token. Lets see how its done. Step 2: Now, ente Continue reading >>

Build Your Own Ethereum Token

Build Your Own Ethereum Token

Ethereum is an open software platform based on blockchain technology that enables developers to build and deploy decentralized applications. Many dApps have their own token built on top of the Ethereum network to crowdfund or run the dApps. In this tutorial, well be building a ERC20 standard token that is capable of the following: transfer tokens from an address to another display amount approved for withdrawal between two accounts We will be programming in Solidity , the language of the Ethereum network created for smart contracts. Open up a text editor and create a file with your token name and the .sol file extension at the end. Note that this token contract tutorial is based on the ERC20 implementation from Token Factory . Lets write a ERC20Token contract by declaring all our methods: pragma solidity ^0.4.4;contract ERC20Token { function totalSupply() constant returns (uint256 supply) {} function balanceOf(address _owner) constant returns (uint256 balance) {} function transfer(address _to, uint256 _value) returns (bool success) {} function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {} function approve(address _spender, uint256 _value) returns (bool success) {} function allowance(address _owner, address _spender) constant returns (uint256 remaining) {} event Transfer(address indexed _from, address indexed _to, uint256 _value); event Approval(address indexed _owner, address indexed _spender, uint256 _value);} Here, we define the functions of the ERC20 Token standard as mentioned above. One can see that totalSupply() returns a uint, or value of tokens in circulation. balanceof() and allowance() also return integers, while transfer(), transferFrom(), and approve() return boolean (true/false) values. The parameters of these functions Continue reading >>

A Beginners Guide To Ethereumtokens

A Beginners Guide To Ethereumtokens

Before learning about Ethereum tokens, it is important to first understand the basics of Ethereum . Please see my beginners guide to Ethereum for those new to this concept entirely. Ethereum tokens are simply digital assets that are being built on top of the Ethereum blockchain. They benefit from Ethereums existing infrastructure instead of developers having to build an entirely new blockchain. They also strengthen the Ethereum ecosystem by driving demand for ether, the native currency of Ethereum, needed to power the smart contracts. This beginners guide should help those who are new to digital assets to understand Ethereum tokens at a high level and how they are different than Ethereum. Ethereum is a platform that can be used to create any arbitrary smart contract including smart contracts that represent digital assets called Ethereum tokens. This is similar to the App Store providing a platform for iOS apps with some apps issuing their own digital currencies that are used within the game or system. However, with Ethereum there is no centralized entity like Apple that controls what gets added to the App Store. Anyone can create a token on top of Ethereum. Ethereum tokens can represent anything from a physical object like gold ( Digix ) to a native currency used to pay transaction fees ( Golem ). In the future, tokens may even be used to represent financial instruments like stocks and bonds. The properties and functions of each token are entirely subject to its intended use. Tokens can have a fixed supply, constant inflation rate, or even a supply determined by a sophisticated monetary policy. Tokens can be used for a variety of purposes such as paying to access a network or for decentralized governance over an organization. Tokens are often issued to the public throu Continue reading >>

What Is An Erc20 Token And Does Exodus Support It?

What Is An Erc20 Token And Does Exodus Support It?

What is an ERC20 Token and does Exodus support it? If youre reading this page, youve probably heard the term ERC20 Token thrown around, especially in the wake of the recent boom in ICO funded blockchain start-ups. ERC stands for Ethereum Request for Comments. This is an official protocol for proposing improvements to the Ethereum network. '20 is the unique proposal ID number. ERC20 defines a set of rules which need to be met in order for a token to be accepted and called as 'ERC20 Token'. The standard rules apply to all ERC20 Tokens since these rules are required to interact with each other on the Ethereum network. These tokens are blockchain assets that have value and can be sent and received, like Bitcoin, Litecoin, Ethereum, or any other cryptocurrency. The difference between these tokens and a standalone currency like Litecoin is that ERC20 tokens piggyback on the Ethereum network, hosted by Ethereum addresses and sent by Ethereum transactions. Take this transaction for example At first glance, this transaction may look like an empty Ether transaction - Note the Value of Ether transacted is zero - but look at the text in the red box: That is a record of the amount of OmiseGo tokens that were sent (2.77 OMG) and the Ethereum networkaddresses involved.The address directly above the red box "Contract 0x....." is the OmiseGo Smart Contract - an application that handles the distribution and transfers of OMG tokens on the Ethereum network.This is why, to execute a 'token transfer' transaction, you must pay a fee in Ethereum to the network. See here for more details on how ERC20 token fees work, see this article Sometimes, token contracts do not handle token transfers correctly, sometimes because the fee was too low, or the contract was incorrectly programmed. In these ca Continue reading >>

Useless Ethereum Token

Useless Ethereum Token

The world's first 100% honest Ethereum ICO. You're going to give some random person on the internet money, and they're going to take it and go buy stuff with it. Probably electronics, to be honest. Maybe even a big-screen television. Let's be honesteveryone's tired of ICOs. They get hyped up for weeks, and then they launch and clog up the Ethereum network for days, Coinbase goes down for a while, and then investors see the new tokens lose most of their value. This ICO is going to be different. The UET ICO transparently offers investors no value, so there will be no expectation of gains. No gains means few investors, few investors means few transactions, and few transactions means no Ethereum network lagnot to mention no depressing posts on /r/ethtrader about people losing all their savings! I learned all about Ethereum smart contracts and Solidity over a weekend so I could launch this ICO. Most of the smart contract contract code is copied from GitHub and Stack Overflow posts, so it should be pretty much right right? Also, I definitely didn't have any smart contract experts look at the contract before I launched it. I mean, why bother? All the other ICOs go through weeks of auditing and they still end up with bugs and vulnerabilities in their contracts. Unlike with every other token sale on the market, I can guarantee here and now that the value of UET will not (in fact, can not) reduce during or after the ICO. Since these tokens aren't worth anything to start with, there's nowhere to go but up! But rememberthis is a completely honest ICO, which means I don't want anyone to mistakenly expect the value of the tokens to go up, either. They're called Useless Ethereum Tokens for a reason. The UET crowdsale has finished. Thanks to everyone who contributed! (Regardless of th Continue reading >>

A Software Bug In Ethereum Tokens Is Helping Halt The Crypto Rally

A Software Bug In Ethereum Tokens Is Helping Halt The Crypto Rally

Resurgent cryptocurrencies were able to shrug off yesterdays broad financial market sell-off, but theyre not so immune today amid concern that one of the cornerstones of the sector has run into some problems. Theres a bug in some ERC20 tokens (those based on the Ethereum network). A researcher in a post on Medium alleged "more than a dozen" are susceptible. ERC20 tokens make up about 90 percent of the $53 billion token market, according to data by CoinMarketCap. In response, at least two exchanges, Poloniex and OKEx, temporarily suspended ERC20 token deposits. The service is back up on Poloniex. This comes a day after some users of MyEtherWallet, an app for storing and sending Ether and Ethereum-based tokens, were attacked and lost funds. The app said in a Reddit post that hackers didnt get to the app itself but were able to hijack servers. And on Monday, former Commodity Futures Trading Commission Chairman Gary Gensler made the case that Ethereums Ether could be considered a security, which would reduce the number of exchanges that can trade the second-largest crypto. All this may be weighing on the broader market, with Bitcoin slumping back below $9,000, and Ether briefly breaching $600. But it takes more than a 7 percent drop on Bitcoin to phase crypto traders. Over the past 24 hours we did see some negative headline news that are potentially impacting the market but weve gone up really fast by quite a bit, so corrections are to be expected," said Bart Michalczuk of crypto fund Blocklink Ventures. Continue reading >>

Top Ethereum Token Protocols Which May Replace Erc20

Top Ethereum Token Protocols Which May Replace Erc20

Top Ethereum Token Protocols Which May Replace ERC20 From ERC20 tokens to collectible coins: What do we know about the Ethereum protocols that manage our ICOs and private transactions? Disclaimer: The views expressed here are the authors own and do not necessarily represent the views of Cointelegraph.com Today, anyone can create a smart contract based on the Ethereum blockchain and release their own tokens. Until recently, the implementation of a particular coin was entirely entrusted to the developer of that coin, and it had rather an experimental nature often accompanied by a number of related problems - including the freezing of investors' funds, hacking of contracts or unpredictable network operation. In this Wild West atmosphere, new Ethereum protocols are being created - which are designed to correct the errors of previous versions. Perhaps one of them will replace the ERC20 by the end of the year, making working with the blockchain even more reliable and simple for users. User friendly logics and simplified structure turned Ethereum into a highly demanded framework, with almost 83 percent of projects choosing the Ethereum blockchain for the underlying structure. More than a dozen major tokens are based on ERC20 standard , and around 400 new coins are issued every day. While these figures may sound unreal, the Coinmarketcap rating and the Ethereum Tokens Chart demonstrate that the total market capitalization of such tokens is around $52.6 bln. Furthermore, this process seems to be totally uncontrolled since no legislation exists to regulate the frequency or initiator of the issue. You may see references to "ERC20" when reading information about Ethereum (ETH). ERC20 is a standard which is the most common and widely used within the Ethereum platform. Wikipedia giv Continue reading >>

Ethereum Token Standards

Ethereum Token Standards

ChronoBank.io is a blockchain project aimed to disrupt HR/recruitment/finance industry similar way as Uber revolutionised taxi business. There are many different possible ways of creating and structuring a token. What is ERC, ERC 20, ERC 721, ERC 884 andmore. Read in Espaol You might have seen the phrase ERC-20 when reading about Ethereum tokens. This refers to a particular standard for tokens, which is the most common and widely-used on the Ethereum platform. This widespread usage is the reason that TIME itself is an ERC-20 token, and why the ChronoWallet supports the same standard (you can create and manage any ERC-20 token using our software). Most exchanges and other wallet platforms support this standard too. However, other standards have been proposed, and there are many different possible ways of creating and structuring a token. ERC stands for Ethereum Request for Comments. This idea is modelled on the Requests for Comments published by the Internet Engineering Task Force (IETF) and the Internet Society (ISOC), which are the main technical development and standards-setting bodies for the internet. An ERC is a type of EIP, or Ethereum Improvement Proposal. Just like the Bitcoin Improvement Proposals (BIPs), only a few of these are actually implemented. ERC stands for Ethereum Request forComments To meet the ERC-20 token standard, an Ethereum token has to include a specific set of functions that means they act and can be used in a certain way. Arguably these are little more than common sense, since without them it would be far more complex to deploy and manage tokens. But codifying these principles allows other applications and smart contracts to interact with ERC-20 tokens in a known, standard and predictable way. ChronoBanks flagship token, TIME, is an ERC-20 t Continue reading >>

The Top 20 Ethereum Tokens

The Top 20 Ethereum Tokens

written by Daniel Frumkin February 22, 2018 Among the cryptocurrency community, there is a large group who believe that Ethereum will one day have the largest market cap of all. The belief is based partly on Ethereums long-term scaling solutions, which includes a transition from proof-of-work to proof-of-stake mining. That transition will result in Ethereum having a drastically lower environmental footprint compared to Bitcoin and other proof-of-work systems. Ultimately, though, it is the ability to build applications on top of the Ethereum blockchain that makes it so promising. While Ethereum has been around for less than 4 years, some successful applications have already been developed on it. In fact, 46 of the top 100 cryptocurrencies by market cap are Ethereum-based tokens. This article will talk about 20 of the most successful Ethereum-based tokens, ranked by their current market cap.Note that I will do my best to keep this list up-to-date and add information about coins that climb up the rankings, but the top 20 moves almost daily! Please refer to coinmarketcap.com/tokens for the current top 20 tokens and their prices. (Information accurate as of February 22, 2018) With a current market cap of nearly $6 billion, EOS is the biggest Ethereum-based token out there. Its important to clarify, however, that EOS has its own blockchain rather than using the Ethereum blockchain. This means that the Ethereum token is the only extent to which EOS is Ethereum-based. EOS does still have a lot in common with Ethereum. Both are primarily smart contract enabled platforms for hosting decentralized applications (dapps). The big technological difference that makes EOS unique is its operating system-like structure that scales both horizontally and vertically. Horizontal scaling is t Continue reading >>

Batchoverflow Exploit Creates Trillions Of Ethereum Tokens, Major Exchanges Halt Erc20 Deposits

Batchoverflow Exploit Creates Trillions Of Ethereum Tokens, Major Exchanges Halt Erc20 Deposits

BatchOverflow Exploit Creates Trillions of Ethereum Tokens, Major Exchanges Halt ERC20 Deposits Share on Facebook Share on Twitter Share on Telegram Share on LinkedIn A newly-discovered Ethereum smart contract exploit has resulted in the generation of billions of ERC20 tokens, causing major exchanges to temporary halt ERC20 deposits and withdrawals until all tokens can be assessed for vulnerability. The exploit, termed the batchOverflow exploit, was first observed on the 22nd of April, when 115 octodecillion BEC (Beauty Coin) was created in two transactions . At the time, BEC was trading at $0.32 per token, which makes the total dollar value of the exploit around $3.7 novemdecillion, a truly absurd figure, which is a 1 followed by 60 zeros. The cryptocurrency community at large only became aware of the exploit on the 24th of April, however, when the same exploit was used on the Smart Mesh token to generate over $5 octodecillion USD in tokens. Several major exchanges have completely shut down ERC20 token deposit or withdrawals subsequent to the transactions. Hong Kong-based exchange OKEx, the third largest cryptocurrency exchange in the world, announced the suspension of all ERC20 token deposits in an official blog post on Tuesday: We are suspending the deposits of all ERC-20 tokens due to the discovery of a new smart contract bug BatchOverFlow. By exploiting the bug, attackers can generate an extremely large amount of tokens, and deposit them into a normal address. This makes many of the ERC-20 tokens vulnerable to price manipulations of the attackers. The OKEx team continued to explain that the exchange will be suspending the deposits of all ERC20 tokens until the bug is fixed in order to protect public interest. OKEx isnt the only exchange to completely halt ERC20 to Continue reading >>

Create A Cryptocurrency Contract In Ethereum

Create A Cryptocurrency Contract In Ethereum

We are going to create a digital token. Tokens in the Ethereum ecosystem can represent any fungible tradable good: coins, loyalty points, gold certificates, IOUs, in-game items, etc. Since all tokens implement some basic features in a standard way, this also means that your token will be instantly compatible with the Ethereum wallet and any other client or contract that uses the same standards. The standard token contract can be quite complex. But in essence a very basic token boils down to this: pragma solidity ^0.4.20;contract MyToken { /* This creates an array with all balances */ mapping (address => uint256) public balanceOf; /* Initializes contract with initial supply tokens to the creator of the contract */ function MyToken( uint256 initialSupply ) public { balanceOf[msg.sender] = initialSupply; // Give the creator all initial tokens } /* Send coins */ function transfer(address _to, uint256 _value) public { require(balanceOf[msg.sender] >= _value); // Check if the sender has enough require(balanceOf[_to] + _value >= balanceOf[_to]); // Check for overflows balanceOf[msg.sender] -= _value; // Subtract from the sender balanceOf[_to] += _value; // Add the same to the recipient }} But if you just want to copy paste a more complete code, then use this: pragma solidity ^0.4.16;interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external; }contract TokenERC20 { // Public variables of the token string public name; string public symbol; uint8 public decimals = 18; // 18 decimals is the strongly suggested default, avoid changing it uint256 public totalSupply; // This creates an array with all balances mapping (address => uint256) public balanceOf; mapping (address => mapping (address => uint256)) public allowa Continue reading >>

Eidoo Your Blockchain Asset Experience Erc20 Tokens List

Eidoo Your Blockchain Asset Experience Erc20 Tokens List

Here you will find a vast ERC20 tokens list. These - together with ERC223 tokens - are entirely supported in the Eidoo app, so you can use our wallet to store these tokens. This ERC20 tokens list has been filled automatically with all the tokens included in coinmarketcap . So, it is almost complete, but it might happen that some tokens may be missing. If you have any questions, feel free to contact us via email at [emailprotected] Continue reading >>

What Is An Ethereum Token: The Ultimate Beginners Guide

What Is An Ethereum Token: The Ultimate Beginners Guide

What is An Ethereum Token: The Ultimate Beginners Guide Angel Investors, Startups & Blockchain developers... To a beginner, the entire concept of Ethereum and Ethereum token can get very confusing very fast. The idea that Ethereum not only has its own currency (Ether) but also has tokens on top of that which can act as currency themselves, can be a little mind-boggling. Before we even begin understanding what Ethereum tokens are all about, its important to grasp some basic concepts. The entire Ethereum network is a giant mass of nodes (computers) connected to one another. In fact, the entire network can be visualized as a single entity called the Ethereum Virtual Machine or EVM for short. All the transactions that have happened and will ever happen in this network are automatically updated and recorded in an open and distributed ledger. So what is the advantage of this? Before we explain that it is important to know what a smart contract is. Smart contracts are how things get done in the Ethereum ecosystem. When someone wants to get a particular task done in Ethereum they initiate a smart contract with one or more people. Smart contracts are a series of instructions, written using the programming language solidity , which work on the basis of the IFTTT logic aka the IF-THIS-THEN-THAT logic. Basically, if the first set of instructions are done then execute the next function and after that the next and keep on repeating until you reach the end of the contract. The best way to understand that is by imagining a vending machine. Each and every step that you take acts like a trigger for the next step to execute itself. It is kinda like the domino effect. So, lets examine the steps that you will take while interacting with the vending machine: Step 1: You give the vending mac Continue reading >>

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