Neo.SmartContract.Framework 3.10.0

Neo.SmartContract.Framework

The foundational framework for developing Neo smart contracts in C#. Provides essential types, attributes, and APIs for blockchain development.

Features

• Smart Contract Base: SmartContract base class with core functionality
• Native Contracts: Access to Neo native contracts (NeoToken, GasToken, etc.)
• Cryptographic APIs: Hashing, encryption, and signature verification
• Storage APIs: Persistent storage operations
• Blockchain Access: Block and transaction information
• Supported Standards: NEP-11, NEP-17, and other standard implementations

Installation

dotnet add package Neo.SmartContract.Framework

Quick Start

using Neo.SmartContract.Framework;
using Neo.SmartContract.Framework.Attributes;
using Neo.SmartContract.Framework.Services;
using System.ComponentModel;
using System.Numerics;

namespace MyContract
{
    [DisplayName("MyToken")]
    [ContractAuthor("Your Name", "you@example.com")]
    [ContractDescription("My NEP-17 Token")]
    [ContractVersion("0.0.1")]
    [SupportedStandards(NepStandard.Nep17)]
    public class MyToken : Nep17Token
    {
        [Hash160("NXV7ZhHiyM1aHXwpVsRZC6BwNFP2jghXAq")]
        private static readonly UInt160 Owner = default!;

        public override string Symbol { [Safe] get => "MYT"; }
        public override byte Decimals { [Safe] get => 8; }

        public static void OnNEP17Payment(UInt160 from, BigInteger amount, object? data = null)
        {
            // Handle incoming payments
        }

        [Safe]
        public static bool IsOwner() => Runtime.CheckWitness(Owner);
    }
}

Core Components

Attributes

• [DisplayName] - Set contract/method display name
• [ContractAuthor], [ContractDescription], [ContractVersion] - Add metadata to contract manifest
• [SupportedStandards] - Declare supported NEP standards
• [Hash160], [InitialValue] - Initialize static fields
• [Safe] - Mark methods as safe (no state changes)

Native Contracts

• NeoToken - NEO token operations
• GasToken - GAS token operations
• ContractManagement - Contract deployment/management
• CryptoLib - Cryptographic operations
• StdLib - Standard library functions

Services

• Storage - Key-value persistent storage
• Runtime - Contract execution context
• Blockchain - Block and transaction access
• ExecutionEngine - Script execution utilities

Documentation

For comprehensive documentation and examples: https://github.com/neo-project/neo-devpack-dotnet/tree/master-n3/docs

License

MIT - See LICENSE for details.