Solidity-Contracts

A comprehensive repository featuring Solidity implementations, libraries, standards, and testing using popular tooling frameworks.

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Key Highlights

ERC Token Standards

This repo includes implementations of fundamental Ethereum standards:

• ERC-20 — Fungible tokens
• ERC-721 — Non-fungible tokens (NFTs)
• ERC-1155 — Multi-token standard for both fungibles and NFTs
• ERC-165 — Interface detection
• ERC-4337 — Account abstraction (UserOperations)
• ERC-2612 — Permit (gasless approvals)
• EIP-712 — Typed structured data signing

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Smart Contract Projects (/hardhat-testing/contracts)

Diverse contract examples with built-in tests:

• TokenMarketplace.sol — Buy & sell marketplace
• Voting.sol — On-chain governance
• Twitter.sol — Simplified social feed
• MerkleProof.sol — Verifying Merkle proofs
• NftMint.sol — Pre- & post-minting flow
• TransferEther.sol — Native ETH transfers
• Wallet.sol — Basic smart wallet
• ToDoList.sol — Decentralized task management

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Libraries (/libraries-testing/contracts)

Re-usable access and ownership modules:

• AccessControl — Role-based control (AccessControl.sol, IAccessControl.sol)
• AccessManager — Advanced control patterns (AccessManaged.sol, AccessManager.sol, AuthorityUtils.sol)
• Ownable — Ownership logic (Ownable.sol, Ownable2Step.sol)
• Extensions — Default admin rules, enumerable roles

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Upgradeable Contracts (/upgradeable-contracts/src)

Upgradeable proxies are implemented:

• Basic Proxy (Implementation1.sol, Implementation2.sol, Proxy.sol)
• Transparent Proxy (ERC1967Proxy.sol, ERC1967Upgrade.sol, ProxyAdmin.sol, TransparentUpgradeableProxy.sol)
• UUPS Pattern (Initializable.sol, UUPSUpgradeable.sol)

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EVM (/EVM/src)

• /ABI_Encoding

  • DotEncode.sol
  • DotEncodePacked.sol
  • DotEncodeWithSelector.sol
  • DotEncodeWithSignature.sol

• BitsMasking.sol

• BitsShifting.sol

• Call.sol

• CallData.sol

• ConstantVar.sol

• DynamicMask.sol

• StorageVariables.sol

• Strings.sol

• TypeError.sol

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Gnosis Safe (/gnosis-safe/src)

Smart account & multi-signature wallet implementation inspired by Safe (formerly Gnosis Safe):

• Transaction execution & batching
• Threshold-based signature verification
• Guards and modules for flexible extensions

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Testing Frameworks

All projects include testing frameworks across tools:

• Hardhat — JavaScript & TypeScript testing environment
• Foundry — Forge + Cast for Solidity-native tests
• Chai and Mocha — BDD-style assertions and test runners

Quick Getting Started

git clone https://github.com/AhmadFarazWeb3Developer/Solidity-Contracts.git
cd Solidity-Contracts/ERC1155  # or any sub-project
forge test                     # if using Foundry
npx hardhat test               # if using Hardhat

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