Programming VIP

Use of Lotus design documents and nodes 1. Official documents Reference: Lotus design documents Filecoin logic sorting and source code Guide Understand the message operation process in Lotus network 2. Noun interpretation 2.1 what does CID mean? Self-describing content-addressed identifiers for distributed systems Self describing conte ...

This article assumes that the reader is a developer familiar with JavaScript and React[1], has a certain understanding of Flow[2], or is familiar with the concepts related to Flow smart contract language Cadence[3]. Through this article, we will be familiar with and build a local development environment, and use JavaScript to complete the ca ...

Development and actual combat sharing of Java blockchain voting system catalogue 1, System introduction The blockchain voting system developed based on the Java language and the popular Springboot+Mybatis framework on the market can be used for the voting platform in enterprise groups, government agencies and organizational alliances. Th ...

0. Summary This paper describes the installation process in detail according to the official documents of FISCO bcos and Webase. For some unclear places in the official documents, it has been supplemented to facilitate novice construction. 1. Preparation 1.1 system: Ubuntu 20.04.3 Desktop / Server Fisco-BCOS 2.8.0 1.2 virtual machine confi ...

Get blockchain status Request address: https://localhost:8555/get_blockchain_state Parameter: {'': ''} Execution: curl --insecure --cert ~/.chia/mainnet/config/ssl/full_node/private_full_node.crt --key ~/.chia/mainnet/config/ssl/full_node/private_full_node.key -d '{"":""}' -H "Content-Type: application/json" -X POST https://localhost:8555/g ...

Blockchain apprentice: on June 12, the market continued to fall, and when will the reversal trend come? Coin circle news Highlights on June 12: The mining ban on cryptocurrency in New York has been suspended. Purpose Ether ETF increased its holdings of 183.74 ETH. eToro CEO: bitcoin is the king of cryptocurrency, and it will continue to e ...

Spring boot case study: employee addition, deletion, modification and query page (fool teaching) As the saying goes, no matter how many concepts you see, it's better to do a case study. This article will take you to learn and complete a Spring boot case. To learn, we must first find the motivation before we have the perseverance to learn. If ...

The contract deployed using the OpenZeppelin upgrade plug-in has an upgradeable feature: it can be upgraded to modify its code while retaining its address, status and balance. You can iteratively add new functionality to the project or fix any errors that might be found in the online version. Configure development environment Create a new npm ...

Blockchain apprentice: on June 22, the market came out of the rapid downward trend again, and the bear market was announced? Coin circle news Hot spots on June 22: Will host a webinar on companies that include bitcoin on their balance sheets. SWARM was separated from Ethereum foundation in 2019. Opposition parties in El Salvador have ac ...

1, Get query parameters Query refers to the URL? Parameters carried later, such as user/info?username = Zhang San & password = 123. The method to obtain the requested query parameters is as follows: When using DefaultQuery, if the username entered by the browser is not obtained, the default value will be returned username := ctx.DefaultQ ...