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You've likely come across the term "ERC-20" in your crypto endeavours, with plenty of these token standards currently ranked in the top 10 (even top 100) cryptocurrencies. But what does ERC-20 actually mean, and what is a token standard? In this piece, we're uncovering everything you need to know about these popular crypto terms.

To start things off, ERC stands for Ethereum request for comment.

What is a token standard?

Let's start at the beginning. When Ethereum was created to provide developers with a platform on which to build decentralized apps (Dapps), the team incorporated several token standards. 

These token standards allow new projects to create, issue and deploy various functioning tokens on the blockchain. Each token standard is a smart contract that holds a set of particular "rules" that must be followed in order to be created.

In recent years a number of blockchain platforms that provide Dapp creation functionality have created their own token standards, however, for the sake of this article we are only looking at Ethereum.

The most popular token standards on Ethereum are the ERC-20, ERC-721, ERC-777, and ERC-1155 tokens. Each holds its own functionality and would be utilized depending on what the Dapp intends to use it for, i.e. will it be a transferable asset or be used to hold ownership rights. 

What is an ERC-20 token?

By far the most popular token standard utilized on the Ethereum network, the ERC-20 token is a fungible token that can be bought, sold and traded in the blockchain ecosystem. To date over 350,000 ERC-20 tokens have been created. 

Similar to the functioning of other cryptocurrencies like Bitcoin and Litecoin, ERC-20 tokens also hold value and are able to be bought and sold, however, they operate solely on the Ethereum blockchain. This means that all ERC-20 transactions conducted are executed on the Ethereum blockchain network.

The rules associated with this particular token ensure that it can function optimally on the Ethereum blockchain, and must be submitted to the community leadership for approval prior to its launch. While some rules are mandatory and others optional, the required ERC-20 rules are as follows:

• total supply: defines the total supply of the token
• balance of: indicates how many tokens are in a wallet address
• transfer To, Transfer From: must be able to be transferred from one user to another
• allowance: ensures that wallets have a sufficient amount before making a transaction
• approve: checks total supply against transactions

The optional elements are centred around the token's name, its ticker symbol and how many decimal places it would have %u200BFor instance, Ethereum's token name is Ether, its ticker symbol is ETH and it is divisible by up to 18 decimal places.

Examples of ERC-20 tokens are Augur (REP), Basic Attention Token (BAT), Maker (MKR), USD Coin (USDC) and OmiseGO (OMG).

Can you mine ERC-20 tokens?

ERC-20 tokens, unlike Ethereum and its native coins (ether), cannot be mined. That is, new tokens are 'minted' when a planned initial token offering (ICO) or security token offering (STO) event takes place. Usually, these events involve users sending ether to a smart contract address and in return receiving the newly minted ERC-20 token.

An ERC-20 token is technically a smart contract so it's possible for the developer team behind an ERC-20 token to issue new tokens at will. However, this isn't recommended because users would be less likely to trust these tokens if they could be minted at will. There must be a measure of scarcity in order for tokens to be valuable.

The pros & cons of ERC-20 tokens:

Some of the main benefits of ERC-20 tokens include: 

Fungible

Fungible ERC20 tokens are interchangeable, just like cash. Although the coins are technically distinct, they function in exactly the same way. You can trade one for another and they will be functionally equivalent, just like cash or gold.

Fungible tokens are fantastic, and there's a lot of value in the technical aspect. On a technical level, it's worth noting that fungible tokens don't add extra value to goods. They're typically beneficial in a variety of commercial scenarios.

Broad adoption

The popularity of ERC-20 tokens is quite apparent in the cryptocurrency industry. The number of exchanges, wallets, and smart contracts that already support newly-launched tokens has made it easy for new projects to integrate with them. There is plenty of developer support and documentation to go around.

Flexibility

The first thing to note about ERC-20 tokens is that they are highly flexible and may be used in a variety of circumstances and applications. This is due to the fact that these tokens are very customizable. They can be used in a lot of different scenarios such as Loyalty points programs, in-game currencies, or digital collectibles such as NFT's.

Some of the main cons of ERC-20 tokens include:

Mainstream

The popularity of ERC-20 tokens is also their greatest weakness. There are so many projects using the same standard that it's difficult to stand out from the crowd without differentiating your token in some way. Moreover, since they're essentially all the same on a technical level.

Fraud and Scams

It takes minimal effort to create a simple ERC-20 token, meaning that anyone could do it for good or bad purposes. As such you want to be careful with what you're investing in when considering blockchains projects because there are some Pyramid schemes masquerading as legitimate projects out there and trying to get unsuspecting investors involved in their scams. As a result, when looking at blockchain projects, you need to be cautious with what you invest in.

Other ERC Token Standards

While there is a large range of ERC tokens available, below we've outlined the most popular ones (excluding the ERC-20 one as it is listed above). 

ERC-721 

This token standard is for a non-fungible token (NFT) which gained huge popularity in the last year across the gaming and digital art worlds. These tokens represent ownership of something, and cannot be used interchangeably. 

ERC-777 

An evolution of the ERC-20 token, the ERC-777 provides more usability, particularly pertaining to its ability to mint or burn tokens. It also holds improved transaction privacy and an emergency recovery function. 

ERC-1155

This token standard allows for the creation of both utility tokens and non-fungible tokens. Making trading more efficient, the token standard allows for bundling of transactions which in turn saves costs. 

Learn more about cryptocurrencies and blockchain

You can learn more about crypto basics from our specially created Learn centre, which covers everything a trader ought to know about cryptocurrencies and the blockchain industry. 

You might be familiar with buying and selling cryptocurrencies, but have you tapped into the world of crypto airdrops? Airdrops are essentially marketing strategies that are designed to build awareness and interest in a blockchain-based crypto project. As we set out to provide more information and explain what these are we will also touch on the powerful benefits that airdrops can bring to investors. 

What Is A Crypto Airdrop?

A crypto airdrop is when a project gives out its native coins for free as a marketing tool to generate hype, grow its network and gain wider adoption, essentially providing free money. On occasion, the coins require small tasks such as following social media pages, and other times they are entirely free of engagements. 

These coins are then transferred to current or potential users' wallets for free in the hopes of drawing in more business. Airdrops rose to fame in the ICO boom of 2017 and are still used today. While handed out for free, airdrops can increase in value over time, becoming potentially lucrative to the receivers.

Through distributing coins, projects increase their number of holders (a positive metric for up and coming projects) as well as increase their decentralisation (due to increased token ownership). 

How Do Cryptocurrency Airdrops Work?

An airdrop is typically outlined in a project's roadmap and will commence once certain criteria have been met. While airdrops can range from project to project, they typically involve small amounts of cryptocurrencies, often built on Ethereum or other smart chain, being distributed to several wallets.

These coins are usually distributed for free, however, on occasion users will need to perform small tasks related to marketing (like engaging on social media or subscribing to a newsletter) or hold a certain number of coins in their wallet. A successful airdrop will see its recipients promoting the project and generating hype before being listed on an exchange.

What Is The Difference Between An ICO And An Airdrop?

While both are related to new digital currency projects, the major difference between the two is that airdrops are when tokens are distributed for free while ICOs require participants to purchase the project's tokens with an outlined purchase price. ICOs are a source of crowdfunding while airdrops are marketing strategies.

What Are The Different Types Of Airdrops?

As mentioned above there are several different types of airdrops; exclusive, bounty and holder. 

Exclusive Airdrops

These airdrops are centered around active members of the community or early adopters. In exclusive airdrops, coins are only sent to designated wallets. Uniswap is a classic example of this, distributing 400 UNI to each wallet that had engaged in the platform before a certain date. The governance token allowed holders to vote on the project's future developments.

Bounty Airdrops

Bounty airdrops are when users need to engage in the platform in order to claim their tokens. This typically involves activities related to social media (liking a post, joining a Telegram channel, tagging friends, etc.) and the project might ask to see proof before distributing the coins. 

Holder Airdrops

This type of airdrop is for users already holding the project's token to thank them for their loyalty. Typically the project's team will take a snapshot of the wallet balances at a certain time and reward all the wallets that meet the minimum criteria. 

When creating holder airdrops, projects might use other more established cryptocurrencies in the hopes of tapping into their networks. For example, in 2016 Stellar (XLM) airdropped 3 billion XLM to users on the Bitcoin network, granting them free access to the Stellar network. 

The Downside To Airdrops

Naturally, there are ill actors out there who take advantage and have created airdrop scams. These scams might involve a "project" airdropping tokens into a wallet but when the holder attempts to move these tokens their wallet is drained. 

Another example of an airdrop scam is a project enticing you to sign up for the airdrop by connecting your wallet only to take your wallet details and gain access to your account. These are typically conducted through websites and fake Twitter and Telegram accounts that look very similar to the real deal but are in fact phishing scams. 

It's important to DYOR ( do your own research ) when engaging in an airdrop, and know that a project will never require you to send funds in order to "unlock" tokens or require you to provide a seed phrase or private key. 

Another downside to airdrops is that projects can create an incorrect impression of growth. If thousands of coins are distributed to thousands of wallets this might cause the project to look busier and more adopted than it actually is. When judging a project by this metric ensure that it has an active trading volume that reflects the number of wallet holders, if there are plenty holders and minimal activity consider this a big red flag. 

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The financial industry has seen significant growth within its digital sector due to the adaptation required during Covid-19. With the increased interest in digital payments has come the rise of virtual cards.

Shopping online and online purchases continue to break barriers that traditional financial institutions never predicted. While these institutions do allow users to do online shopping, there are still a lot of limitations and risks to be wary of. 

Every time you shop online, you risk your account number and details being stolen and used against you. Credit card companies have had to evolve, and one way they have done that is through the introduction of an actual account-linked virtual card.

How do virtual credit cards and debit cards work?

Virtual cards are stored on your mobile device and can be used to make contactless payments in store or online. A virtual card has its own unique card number, CVC, and expiration date. These virtual cards are simply a copy of your physical card, linked to your bank account, and stored on your application or phone. Think of it as an online account and card.

Virtual cards are very similar to an actual credit or debit card, with the main difference being that they only exist digitally, and can not be used to withdraw physical cash. Virtual credit cards provide the same features and mechanics as traditional credit and debit cards. 

A virtual credit card still has an expiry date and 16-digit account number, and CVV codes. They are connected to payment networks like Visa and Mastercard and are generally accepted by merchants who use physical card machines, similar to Apple and Google Pay. 

Your virtual card information and virtual credit card number are stored digitally, eliminating the risk of someone stealing your card and simply entering your details when shopping online. 

Virtual credit cards act as digital wallets, providing more advanced security and ease of online access. Virtual cards are created for one-time use or act as a temporary account number, but what are the benefits of a limited-use virtual card number? Let’s get into it.

Benefits of a virtual credit card

The first and foremost virtual credit card feature benefit that you can expect is an enhanced layer of security. To combat fraudulent activity, a data breach, and account information being stolen, virtual cards have randomly generated and disposable card numbers. This makes virtual cards one of the safest payment methods, eliminating physical and confirmed details, meaning your temporary information can not be stolen or lost. If your info is compromised, you can cancel it without having to create a new bank account or waiting for a new card in the mail.

Control and customization is an additional layer of benefits users can expect from using virtual credit cards. Users can customize how many virtual account numbers they want, set spending limits, choose their preferred currencies, and more. Similar to a normal debit card account, you can also create recurring payments with merchant details, as tailored to the amount, time, and so on.

Some virtual credit cards provide users with point-earning rewards or store credit when used. Credit card companies can also easily access your information to improve your credit score based on your recurring payments set up. 

Creating multiple virtual debit cards allows you to distribute, allocate, and track funds with ease. This means at the end of the day, you have more visibility of your funds going in and out and can create a dedicated virtual debit card for a specific area of your financial responsibilities.

Getting your virtual card number

Whether you are trying to manage your funds with your debit or credit cards accounts, a virtual card can make matters easier. All you need is a debit or credit card account, such as the one offered by Tap and you can create your unique virtual card at the click of a button. With some traditional banks you can even create multiple cards if you want, each with its own unique account number and expiration date. 

These digital wallets and accounts provide ease when you want to shop online, avoid physical wallet and card theft, as well as easier fund management. A virtual debit card is a big part of the future, as we move into the digital era.

Experience a whole new world of digital payments and money management from the safety of your mobile device. You should be able to use your virtual card at any merchant that accepts debit and credit card payments, or contactless transactions, such as Apple Pay or Google Pay. Create your virtual account number today and enjoy purchases online and in-store. The future of payments is here.

We are delighted to announce the listing and support of Polygon ( MATIC ) on Tap!

MATIC is now available for trading on the Tap mobile app. Buy, Sell, Trade or hold MATIC for any of the other asset supported on the platform without any pair boundaries. Tap is pair agnostic, meaning you can trade any asset for any other asset without having to worries if a "trading pair" is available.

We believe supporting MATIC will provide value to our users. We are looking forward to continue supporting new crypto projects with the aim of providing access to financial power and freedom for all.
The MATIC token is highly liquid with a market cap of $8,031,194,777 at the time of writing.
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MATIC is an ERC-20 token native to the Polygon Network used for a variety of purposes, such as paying transaction fees, staking, and governance. Polygon (formerly Matic Network) is a Layer-2 solution that operates on the Ethereum network. By using sidechains, Polygon offers developers secure and instantaneous transactions that can easily scale. Those who create decentralized applications (DApps) will find the Polygon network advantageous due to its cheap fees and speedy transaction time.

Get to learn more on Polygon MATIC here.

We are delighted to announce the listing and support of Sandbox (SAND) on Tap!

SAND is now available for trading on the Tap mobile app. You can now Buy, Sell, Trade or hold SAND for any of the other asset supported on the platform without any pair boundaries. Tap is pair agnostic, meaning you can trade any asset for any other asset without having to worries if a "trading pair" is available.

We believe supporting SAND will provide value to our users. We are looking forward to continue supporting new crypto projects with the aim of providing access to financial power and freedom for all.

The Sandbox is a pioneer in the movement to incorporate blockchain technology into the gaming sector. Created in 2011, The Sandbox is an play-to-earn game that allows users to be both creators and players, with the ability to monetize their in-game assets and earn SAND tokens.

Powered by the SAND token, the Sandbox’s native token serves as the foundation for all transactions and interactions. SAND tokens can be obtained by playing games, selling digital assets on the Sandbox Marketplace, participating in competitions, or buying it through a reliable exchange.

Get to know more about The sandbox (SAND) in our dedicated article here.

Gnosis is spearheading the merger of prediction markets with digital assets, enabling the market to take on a more decentralised approach. Prediction markets allow investors to trade on the outcome of events, similar to how they would exchange digital assets. 

What is Gnosis?

Gnosis is a prediction market platform built on the Ethereum blockchain. The platform allows users to trade crypto assets representing event outcomes from around the world, from sports matches to elections. As the results unfold, Gnosis tokens either increase or decrease in value depending on what was predicted by the user. 

The goal at Gnosis is to build a foundation that decentralised applications can use as forecasting tools. This is done by allowing any party access to create their own markets while also gathering public opinion from an uncensored source. The long-term aim is to build a dependable forecasting tool that could help those in finance, business, insurance, and other sectors make more informed decisions.

The platform is made up of three sectors, the Apollo network, Gnosis Safe and DutchX, outlined below. Gnosis also makes use of two cryptocurrencies, GNO and OWL, to ensure their transactions are secure and running smoothly. Even though they're making good progress, they still have a way to go before reaching all their goals, notwithstanding competitors like Augur (REP) that offer similar services.

Who created Gnosis?

The Gnosis prediction market was founded by Martin Koeppelmann and Stefan George in 2015. No stranger to prediction market platforms, George previously founded fairlay.com, a centralised Bitcoin prediction market. The Gnosis platform was one of the first projects backed by the Ethereum-focused incubator, ConsenSys, and has grown into a 50+ team with its main development hub based in Berlin. 

In terms of raising funds, the project successfully underwent an ICO (initial coin offering) in 2017, raising 250,000 ETH (around $12.5 million at the time). In just 15 minutes, the project sold 4% of its GNO supply. 

A few months later, the Gnosis team launched Olympic, a test version of the prediction market platform. The next year, it launched Apollo, version 1.0 of Gnosis alongside DutchX, a decentralised exchange designed to trade and manage digital assets. Toward the end of 2018, the Gnosis ecosystem launched the Gnosis Safe, the platform's integrated wallet. 

How does the Gnosis protocol work?

To ensure a comprehensive experience for all users, Gnosis employs three interoperable product lines and utilises three main products. Entirely built on the Ethereum platform, the three layers to Gnosis' architecture consist of:

• The Core Layer

Provides the foundational smart contracts that power the events, settlements, market mechanisms, and outcome tokens.

• The Service Layer

Offers resources for consumer applications and is used for tools like chatbots, stablecoins, and payment processor integration. It also controls the trading fee model.

• The Applications Layer

Contains the prediction market dapps. The majority of the dapps in this layer were created by third parties who charge users to use them, with Gnosis only building a few themselves.

The three platforms that make up the network are the Apollo Network, Gnosis Safe and DutchX, as outlined below. 

The Apollo Network (Gnosis prediction market)

The Apollo Network, Gnosis' prediction market platform allows users to create their own markets for any events and tokens. Users can then speculate on the outcome by buying and selling positions.

As the outcome approaches, the tokens will increase or decrease in value, and once the event is finalised the tokens representing the final outcome will receive the full value while the others become worthless. 

DutchX (exchange)

DutchX is the platform's decentralised exchange where users can trade and auction off their tokens.

Gnosis Safe (wallet)

Gnosis Safe is a browser and crypto wallet that interacts with Ethereum apps. 

What are the Gnosis digital assets?

GNO Token

Gnosis' native cryptocurrency is GNO, an Ethereum-based token that was sold during the Gnosis ICO. GNO tokens have a maximum supply of 3 million tokens. 

The main use case of GNO tokens is for creating OWL tokens via staking to earn rewards. Users can lock GNO tokens in the Gnosis chain to generate OWL tokens through staking, which is dependent on the length of the staking period. The max time is one year.

OWL Token

OWL tokens on the other hand are used to pay fees on the prediction market platform. These tokens are pegged to the US dollar, with their distribution maintaining its peg. OWL tokens were previously called WIZ tokens before being rebranded at the same time as the website.

Users can also opt to pay fees using supported Ethereum tokens. All fees not paid for in OWL are collected and sold for GNO, then burned. 

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