Aptos has made significant advancements in its consensus protocol, now operating on its fourth iteration called Aptos BFT. This latest iteration boasts the lowest latency and the most advanced features developed to date. Notably, Aptos BFT separates the consensus and execution processes, resulting in optimized authentication and streamlined data structures. These improvements greatly reduce transaction execution time. A key technical feature of Aptos is its utilization of parallel transaction execution, enabling exceptional scalability.

Unlike traditional blockchains that employ serial transaction execution, where transactions are processed one after another, Aptos adopts parallel execution. This approach allows multiple transactions to be executed simultaneously by capturing a snapshot of the current state and processing them in parallel. While serial execution ensures transaction status confirmation, it inherently limits scalability. Aptos addresses this limitation by employing parallel execution, significantly enhancing transaction throughput.

The challenge with parallel execution lies in preventing different transactions from interfering with each other. Aptos has made notable progress in this area and currently reports impressive results on its testnet, with over 20,000 nodes and a transaction processing capacity of 10,000 transactions per second (TPS). Aptos aims to achieve an ultimate goal of 100,000 TPS. However, the actual attainment of this goal and the network’s stability without downtime will be revealed once the mainnet is launched and operational.

Move Language

Introduction to the Move Language

The Move language is a cutting-edge smart contract language developed by Diem. In order to attract a wide range of developers to build applications for the new ecosystem, it’s crucial to have a language that developers are already familiar with. Currently, popular programming languages in the blockchain space include Solidity, used by Ethereum, Avalanche, and BSC, as well as Rust, used by projects like PolkaDot and Solana. Move, being a brand-new language, introduces a learning curve for developers interested in creating on Aptos.

The existing pool of developers proficient in Move is limited, and the associated development tools may not be as comprehensive as those available for more established languages. However, driven by projects like Aptos and Sui within the “Diem” ecosystem, and with the potential for further adoption of Diem technology in the future, Move has the potential to evolve into one of the mainstream blockchain development languages.

The Move programming language was specifically designed as a secure and programmable foundation for Aptos’ vision of creating an inclusive financial infrastructure. With this objective in mind, Move aims to address the main pain points of existing blockchain languages. As a result, Aptos’ proposed solution can be summarized by four key goals: exceptional resource handling, flexibility, security, and verifiability.

Features and Advantage of the Move Language

One of the prominent features of Move is the ability to define custom resource types, ensuring that resources can only be moved between program storage locations, rather than being cloned or deleted. This approach significantly enhances security by effectively mitigating vulnerabilities. These resources are then managed by Move modules, akin to smart contracts, which govern the encoding rules for creating, updating, and deleting declared resources.

Move modules possess an advantage over smart contracts as they enforce data abstraction. This means that resources are transparent within their respective declaration modules but opaque outside of them. Additionally, leveraging an expressive canonical language, Move provers can formally verify the properties of Move modules, providing efficient support for continuous integration testing.

The above overview provides a concise introduction to the features and advantages of Aptos and the Move language. Next, we will delve deeper into Aptos and Move by deploying and invoking real operations, as well as discuss the security and related considerations of Move in comparison to the more mature EVM and Solidity ecosystems.

Before we proceed with deployment and invocation, let’s gain a basic understanding of some of Aptos’ architectural components. The first component is the account system, which represents the resources on the Aptos blockchain capable of initiating transactions.

The first 16 bytes of the auth_key correspond to the Authentication Key Prefix, while the last 16 bytes represent the account address. Any transaction that creates an account requires both an account address and a verification key prefix, whereas transactions interacting with an existing account only require the address. The aforementioned explanation pertains to single-signer mode, but there is also a multi-signature mode available. Multi-signature mode functions similarly to conventional multi-signature contracts.

Based on the above understanding, the authentication key can replace the public and private keys of an account, effectively acting as the highest owner of the address. Consequently, the authentication key can be designed to support multiple signatures, as outlined in the following steps:

1. Generate a key pair: Generate N ed25519 public keys p_1, …, p_n.

2. Derive a 32-byte authentication key: calculate auth_key = sha3–256 (p_1 | … | p_n | K | 0x01). Derive the address and authentication key prefix as described above. K represents the K-of-N required to validate transactions. 0x01 is a 1-byte signature scheme identifier where 0x01 represents a multi-signature.

Move Overview

In Aptos, each transaction encompasses a Move trading script that encodes the logic executed by validators on behalf of clients. The transaction script interacts with Move resources stored in the global storage of the blockchain by invoking one or more Move modules. These Move modules function similarly to smart contracts, defining rules for updating the blockchain, and they must be associated with an account, represented by an address.

The trading script, often referred to as a “tx,” can be either a single transaction or a complex transaction invoked by multiple modules. It is important to note that the transaction script itself is not stored on the blockchain. Additionally, the calling object for the transaction script can only be a module, and the script itself can only be utilized once.

Now, let’s explore the process of deploying an Aptos module, also known as a contract.

Thanks

https://www.numencyber.com/what-is-aptos-and-how-does-it-work/

Altcoins are generally defined as all cryptocurrencies other than Bitcoin (BTC). However, some people consider altcoins to be all cryptocurrencies other than Bitcoin and Ethereum (ETH) because most cryptocurrencies are forked from one of the two. Some altcoins use different consensus mechanisms to validate transactions, open new blocks, or attempt to distinguish themselves from Bitcoin and Ethereum by providing new or additional capabilities or purposes.

Most altcoins are designed and released by developers with different visions or uses for their tokens or cryptocurrency. Learn more about altcoins and what makes them different from Bitcoin.

KEY TAKEAWAYS

• The term altcoin refers to all cryptocurrencies other than Bitcoin (and for some people, Ethereum).

• There are tens of thousands of altcoins on the market.

• Altcoins come in several types based on what they were designed for.

• The future of altcoins is impossible to predict, but if the blockchain they were designed for continues to be used and developed, the altcoins will continue to exist.

Understanding Altcoins

"Altcoin" is a combination of the two words "alternative" and "coin." The term generally includes all cryptocurrencies and tokens that are not Bitcoin. Altcoins belong to the blockchains for which they were explicitly designed. Many are forks—a splitting of a blockchain that is not compatible with the original chain—from Bitcoin and Ethereum. These forks generally have more than one reason for occurring. Most of the time, a group of developers disagree with others and leave to make their own coin.

Many altcoins are used within their respective blockchains to accomplish something, such as ether, which is used in Ethereum to pay transaction fees. Some developers have created forks of Bitcoin and re-emerged as an attempt to compete with Bitcoin as a payment method, such as Bitcoin Cash.

Others fork or are developed from scratch, attempting to create a blockchain and token that appeals to a specific industry or group, such as Ripple's attempt to attract the banking industry with a faster payment system.

Altcoins attempt to improve upon the perceived limitations of whichever cryptocurrency and blockchain they are forked from or competing with. The first altcoin was Litecoin, forked from the Bitcoin blockchain in 2011. Litecoin uses a different proof-of-work (PoW) consensus mechanism than Bitcoin, called Scrypt (pronounced es-crypt), which is less energy-intensive and quicker than Bitcoin's SHA-256 PoW consensus mechanism.

Ether is another altcoin. However, it did not fork from Bitcoin. It was designed by Vitalik Buterin, Dr. Gavin Wood, and a few others to support Ethereum, the world's largest blockchain-based scalable virtual machine. Ether (ETH) is used to pay network participants for the transaction validation work their machines do.

Thanks

https://www.investopedia.com/terms/a/altcoin.asp

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Yakovenko first proposed this innovative blockchain in 2017, and Solana launched in March 2020. Today SOL has become popular crypto, ranking as the 11th largest coin by total market capitalization.

What Is Solana?

Solana is a blockchain with striking similarities to Ethereum—in fact, it’s often referred to as an “Ethereum killer.” Like Ethereum, the SOL token can be purchased on most major exchanges. The token’s real value is in conducting transactions on the Solana network, which has unique advantages.

The Solana blockchain uses a proof-of-history consensus mechanism. This algorithm uses timestamps to define the next block in Solana’s chain.

Most early cryptocurrencies, such as Bitcoin and Litecoin, use a proof-of-work algorithm to define the blocks in their chains. Proof of work uses a consensus mechanism that relies upon miners to determine what the next block will be.

However, this proof-of-work system is slow and resource-heavy, leading to the use of tremendous amounts of energy. This is one reason why Ethereum converted to a proof-of-stake system, reducing energy consumption by 99.9%.

Unlike the earlier proof-of-work mechanism, proof of stake uses staking to define the next block. Staked tokens are held as collateral by the blockchain until validators reach a consensus about the chain’s next block.

Solana’s Delegated Proof of Stake

According to Konstantin Anissimov, chief operating officer at crypto exchange CEX.IO, Solana uses “a mixture of time-tested cryptographic strategies and fresh innovations to address the shortcomings of crypto’s first-wave solutions.”

Powered by its unique combination of proof of history and what’s referred to as delegated proof-of-stake algorithms, the main problem Solana was attempting to solve was Ethereum’s scalability issues. Delegated proof-of-stake is a variation of the more traditional proof-of-stake algorithm.

For those who need a refresher, the proof-of-stake mechanism is a process of transactions for creating new blocks in a blockchain using a system of validators.

Solana brings users several advantages with its delegated proof-of-stake mechanism. The history algorithm adds a layer of security to the network, says Christian Hazim, analyst at ETF provider Global X.

In essence, Solana addresses two out of three issues identified by Ethereum co-founder Vitalik Buterin in his blockchain trilemma of scalability, security and decentralization.

Although Buterin originally claimed Ethereum would address all three aspects of this trilemma, most experts believe the network only addresses two factors: security and decentralization.

Solana, however, is designed to address two parts of the trilemma: security and scalability. SOL’s proof of history algorithm provides unique security for the network. While the speed with which the Solana platform performs computations allows for increased scalability.

Both let you use digital money without payment providers or banks. But Ethereum is programmable, so you can also build and deploy decentralized applications on its network.

Bitcoin enables us to send basic messages to one another about what we think is valuable. Establishing value without authority is already powerful. Ethereum extends this: rather than just messages, you can write any general program, or contract. There is no limit to the kind of contracts which can be created and agreed upon, hence great innovation happens on the Ethereum network.

While Bitcoin is only a payment network, Ethereum is more like a marketplace of financial services, games, social networks and other apps that respect your privacy and cannot censor you.