The Bitcoin feature is called nLocktime, and it can be used to delay transactions using block heights instead of timestamps. As a Bitcoin client, if you are not dependent on the network, you will use the block height instead of the timestamp. Block height turns out to be an example of what cryptographers call a verifiable delay function. This is a cryptographically secure way to indicate that time has passed. In Solana, we use a more fine-grained verifiable delay function, a SHA 256 hash chain, to check the ledger and reconcile consensus. With it, we implemented optimistic concurrency control and are now moving towards the theoretical limit of 710,000 transactions per second.

Solana Wallet

A crypto wallet is a device or application that stores a collection of keys that can be used to send, receive, and track the ownership of cryptocurrencies. Wallets can come in many forms. A wallet may be a directory or file in a computer file system, a piece of paper, or a specialized device called a hardware wallet. There are also various smartphone apps and computer programs that provide a user-friendly way to create and manage wallets.

A key is a securely generated private key and password and its derived public key. The private key and its corresponding public key are collectively referred to as a key pair. A wallet contains a collection of one or more key pairs and provides some means of interacting with them.

This public key (often referred to simply as PUBKEY) is called the wallet’s receiving address or just its address. Wallet addresses can be freely shared and displayed. When the other party wants to send a certain amount of cryptocurrency to the wallet, they need to know the wallet’s receiving address. According to the implementation of the blockchain, the address can also be used to view certain information about the wallet, such as checking the balance, but cannot change anything about the wallet or withdraw any tokens.

The private key that needs to be digitally signed for any transaction sends cryptocurrencies to another address or makes any changes to the wallet. Never share a private key. If someone gains access to the wallet’s private key, they can withdraw all the tokens contained in it. If the wallet’s private key is lost, any tokens sent to that wallet address are permanently lost.

usage

deployer

To deploy the program, you will need the location of the program shared object (program binaries.so)

solana Program deployment< PROGRAM_FILEPATH >

Successful deployment returns the program id of the deployer, for example:

procedure ID：3KS2k14CmtnuVv2fvYcvdrNgC94Y11WETBpMUGgXyWZL

Specify the key pair to be deployed to the specific program ID in the deploy command:

solana program deploy --program-id <KEYPAIR_FILEPATH> <PROGRAM_FILEPATH>

If the program ID is not specified on the command line, the tool first looks for the matching key pair file <PROGRAM_FILEPATH>, or internally generates a new key pair.

The matching program keypair file is located in the same directory as the program’s shared object and is named <PROGRAM_NAME>-keypair.json. The matching program key pair is automatically generated by the program builder:

./path-to-program/program.so
./path-to-program/program-keypair.json

An open source Web blockchain marketplace插图1

new function

As Solana evolves, new features or patches may be introduced to change the behavior of the cluster and the way the program runs. Changes in behavior must be coordinated across the various nodes of the cluster, and if the nodes are not coordinated, then these changes can cause consensus to break down. Solana supports a mechanism called runtime features to facilitate the smooth adoption of changes.

The runtime feature is the epoch coordination event, where one or more behavioral changes for the cluster occur. Solana includes new changes that change behavior in feature gates and disables them by default. The Solana tool is then used to activate a feature that marks it as pending, and once marked as pending, the feature is activated for the next period.

资源下载此资源为免费资源立即下载

Telegram:@John_Software

collect(0) Like (0)

Disclaimer: This article is published by a third party and represents the views of the author only and has nothing to do with this website. This site does not make any guarantee or commitment to the authenticity, completeness and timeliness of this article and all or part of its content, please readers for reference only, and please verify the relevant content. The publication or republication of articles by this website for the purpose of conveying more information does not mean that it endorses its views or confirms its description, nor does it mean that this website is responsible for its authenticity.

Ictcoder Free source code An open source Web blockchain marketplace https://ictcoder.com/kyym/an-open-source-web-blockchain-marketplace.html

lllll

Share free open-source source code

Previous article： An efficient Python crawler framework Scrapy

Next article： A Js-based desktop software development framework

Q&A

What is the delivery method?

1, automatic: after taking the photo, click the (download) link to download; 2. Manual: After taking the photo, contact the seller to issue it or contact the official to find the developer to ship.

View details

How long is the trading cycle?

1, the default transaction cycle of the source code: manual delivery of goods for 1-3 days, and the user payment amount will enter the platform guarantee until the completion of the transaction or 3-7 days can be issued, in case of disputes indefinitely extend the collection amount until the dispute is resolved or refunded!

View details

Matters needing attention

1. Heptalon will permanently archive the process of trading between the two parties and the snapshots of the traded goods to ensure that the transaction is true, effective and safe! 2, Seven PAWS can not guarantee such as "permanent package update", "permanent technical support" and other similar transactions after the merchant commitment, please identify the buyer; 3, in the source code at the same time there is a website demonstration and picture demonstration, and the site is inconsistent with the diagram, the default according to the diagram as the dispute evaluation basis (except for special statements or agreement); 4, in the absence of "no legitimate basis for refund", the commodity written "once sold, no support for refund" and other similar statements, shall be deemed invalid; 5, before the shooting, the transaction content agreed by the two parties on QQ can also be the basis for dispute judgment (agreement and description of the conflict, the agreement shall prevail); 6, because the chat record can be used as the basis for dispute judgment, so when the two sides contact, only communicate with the other party on the QQ and mobile phone number left on the systemhere, in case the other party does not recognize self-commitment. 7, although the probability of disputes is very small, but be sure to retain such important information as chat records, mobile phone messages, etc., in case of disputes, it is convenient for seven PAWS to intervene in rapid processing.

View details

Systemhere declaration

1. As a third-party intermediary platform, Qichou protects the security of the transaction and the rights and interests of both buyers and sellers according to the transaction contract (commodity description, content agreed before the transaction); 2, non-platform online trading projects, any consequences have nothing to do with mutual site; No matter the seller for any reason to require offline transactions, please contact the management report.

View details