Initial Coin Offerings (ICOs) have become extremely popular ways to raise funds while avoiding the regulatory restrictions of fiat financing.
The majority of ICOs are based on Ethereum as a platform, and more specifically on Ethereum’s Smart Contracts.
Shares in ICO projects are usually sold for ETH or BTC, and awarded in the form of tokens (also known as ERC20 tokens).
So while we’re used to seeing and dealing with ERC20 tokens, few people know exactly what they are, how they work, or even what ERC20 means.
In case you’re wondering, ERC stands for Ethereum Request for Comments, and 20 is the number assigned to the proposal. …
A DAO (Decentralized Autonomous Organization) can be seen as the most complex form of a Smart Contract, where the bylaws of the decentralized organization are embedded into the code of the Smart Contract, using complex token governance rules.
At today’s evolutionary stage, a DAO materializes as a Smart Contract (a piece of code) executed on top of a distributed networking and consensus technology like the Ethereum blockchain or similar blockchains.
The idea of a decentralized organization takes the concept of traditional organizations and decentralizes it. Instead of a hierarchical structure managed by a set of humans interacting in person and controlling property via the legal system, a decentralized organization involves a set of people interacting with each other according to a protocol specified in code and enforced on the blockchain. …
Every time people ask me how to add their token to MetaMask it means to explain where to paste their token address (if they know what their token address is), what the symbol is, what decimals are, why they should be 18 and many other things.
So, since MetaMask now supports EIP 747, which defines a way for sites to suggest an asset to their users’ wallet to track, I decided to build a DApp to do that in the simplest way.
By using the DApp you can create a link for your token or an embeddable widget for your website. …
When you create a wallet by using MyEtherWallet, MyCrypto, MetaMask, geth or any other decentralized client, nobody asks you about your email.
It’s right, because of it means that you own your private key as supposed to be and you don’t need anything else, but, it also means that nobody will notify you when you receive Ethereum or any other token.
Etherscan is a Block Explorer and API provider for Ethereum. It allows you to explore and search the Ethereum blockchain for transactions, addresses, tokens, prices and other activities taking place on Ethereum.
Etherscan also has an Address Watch List feature and now we will discover how to use it. …
Have you never heard about Crypto Collectibles, Non-Fungible Tokens (NFTs) or, technically, ERC721 Ethereum Tokens?
Basically they are unique and distinguishable tokens which have individual traits and identities.
As per official definition “NFTs can represent ownership over digital or physical assets” like:
As defined in the official ERC721 proposal, they have a set of functions to handle transfers and token ownership.
Below the standard token and receiver interface. …
Each of you have surely already heard of ERC20 tokens.
In this article I will discuss how they could be used for real life payments and why I’m building the ERC1363 Payable Token.
Here you can find the ERC1363 EIP and implementation.
As EIP 20 says:
ERC20 provides basic functionality to transfer tokens, as well as allow tokens to be approved so they can be spent by another on-chain third party.
So basically you can use tokens to represent any fungible tradable good: coins, loyalty points, in-game points, etc.
Here the standard ERC20 definition:
Here a basic implementation of the
transfer function. …