Blockchain data how to write to the chain

Each block has a unique Hash value, which is generated based on the content of the block, and once the content is changed, the Hash value of that block also changes. Each block contains the hash value of the previous block. If you modify the content of a block, the Hash of the block is…

Blockchain is a distributed ledger database technology. It is mainly composed of blocks and chains. The block contains specific transaction data information, and the content of each block will generate a unique hash according to sha256, and the header of each block contains the hash of the previous block. The chain is responsible for linking…

A standardized implementation of a smart contract that defines a common set of rules for all ERC20 tokens to interact seamlessly between wallets, exchanges, and smart contracts. It has the following properties and methods:

Gas is a unit of measure that is primarily used to calculate the amount of work required in a contract transaction. It is generally paid to the miner/verifier as a reward fee. The higher the Gas fee given, the faster that transaction will be. A certain amount of Gas is consumed for each transaction to…

Ethernet is a public blockchain platform using blockchain technology. Ethernet has EVMs to run smart contracts. (A smart contract is a program developed with Solidity) Ether has its own tokens as well. PS1:Ether is a public blockchain network with a broad vision. The designers of Ether realized that if you build a public blockchain network,…

ERC-721 is a standard for non-fungible tokens (NFTs) that defines a specific function interface. It contains the following properties and methods. name(): returns the name of the token.symbol(): returns the symbol of the token.balanceOf(): returns the number of tokens owned by an account.ownerOf(uint256 tokenId): return the owner of the token with the specified tokenId.safeTransferFrom(address from,…