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Knowledge Bank

Solidity programming

Guide to Solidity smart contract development

Solidity programming

Solidity is the primary programming language for Ethereum and EVM-compatible blockchains.

Language fundamentals

Basic Types

  • Integers
  • Address
  • Boolean
  • Strings
  • Arrays

Advanced Types

  • Structs
  • Mappings
  • Enums
  • Custom types

Contract structure

1. State variables

contract Example {
    uint public value;
    address public owner;
    mapping(address => uint) balances;
}

2. Functions

function transfer(address to, uint amount) public {
    require(balances[msg.sender] >= amount);
    balances[msg.sender] -= amount;
    balances[to] += amount;
}

3. Events

event Transfer(address indexed from, address indexed to, uint amount);

Best practices

  1. Gas Optimization

    • Efficient data types
    • Batch operations
    • Storage vs Memory
    • Loop optimization

  2. Security

    • Access control
    • Input validation
    • Overflow protection
    • Reentrancy guards

  3. Code Organization

    • Modular design
    • Interface separation
    • Library usage
    • Clear documentation

Follow established patterns and security best practices when writing Solidity code.

Smart contracts

Understanding smart contract development and best practices

Understanding subgraphs

Guide to Subgraphs on SettleMint platform

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