Programmer Think

Overview of 0x1 When I started ETF Intelligence Contract Development, I first faced a choice, Hardhat Vs Truffle Vs Remix, which development tool should I choose. I searched Google for a lot of comparisons, including Holliville Valdez's " Hardhat Vs Truffle Vs Remix - Which Is The Best For Blockchain Development?> This article helped me ...

Smart contract overview Smart contract is the software running on the blockchain. It is often compared to "vending machine", because it is easy to understand: the vending machine accepts and executes external instructions. When the customer selects the goods and pays, the vending machine will release the goods to the customer without ...

Abstract The first article of stepping on the pit writes the example given on the official website, which records how to test your Contract Caliper version is v0 four point two Repository In this article, we continue to use Github Repo on the official website to create a new contract. In order to simplify, we still use Sample to change the ...

This article was written in December 2018 Ethereum learning day1 demo of blockchain principle https://anders.com/blockchain/blockchain.html Use geth to build your own private chain (single node) Please install geth first and add geth to the environment variable 1. In a directory, take C:\Users\yqq\eth\persondata as an example ...

MasterChef interpretation of SushiSwap biakia0610 Issued at 14:22:31, April 13, 2021 412 Category column: Blockchain Article label: Blockchain ...

A large number of articles on the Internet have introduced ECDSA (elliptic curve encryption) algorithm to generate Ethereum public-private key pairs, and then generate a unique Ethereum address. Most of them mentioned that the uncompressed public key generates the address by hashing first, and then the last 40 bits are the address. However, I m ...

RLP coding Basic principles The sole purpose of RLP (Recursive Length Prefix) coding is to solve the problem of structure coding. The two structures of RLP coding design are: String and List. They are defined as follows: String Refers to a string of bytes, corresponding to Go In language string/[]byte/uint/[]uint/[N]uint etc. List Specified ...

0x take Limit Order of protocol analysis As for the question of what 0x is, I won't be verbose here. There are many documents explaining the basic concepts. Here we mainly show the listing and eating process of limit order. 0xprotocol Process Overview Explanation of some problems in 0x 0x limit order hanging order eating order process Intera ...

Smart contract 1. Introduction JD Chain intelligent contract system consists of five parts: contract code language, contract engine, contract account, contract development framework and contract development plug-in. Contract code language is a programming language used to write smart contracts. Contract engine is a virtual machine that inter ...

catalogue err="authentication needed: password or unlock"Error: authentication needed: password or unlock undefined Object has no number say:   hello.say() cannot be called miner is needed at this time   To dig the mine (bookkeeping) A Contract appears   mined !   hello.say() Construction of development environment Sol ...