openzeppelin-contracts
Skill based on OpenZeppelin Contracts (docs as of 2026-02-09), generated from
sources/openzeppelin.
OpenZeppelin Contracts is a library for secure smart contract development on EVM. Use via inheritance (e.g. ERC20, AccessControl) or using for (e.g. ECDSA, Math). Covers access control (Ownable, RBAC, AccessManager, TimelockController), tokens (ERC20, ERC721, ERC1155, ERC4626, ERC6909), upgradeable variants, and utilities (crypto, math, introspection, structures, storage).
Core References
| Topic | Description | Reference |
|---|---|---|
| Overview | Library usage, inheritance, extending contracts | core-overview |
| Access Control | Ownable, AccessControl (RBAC), AccessManager, TimelockController | core-access-control |
| Tokens | Token standards and when to use ERC20/721/1155/4626/6909 | core-tokens |
| ERC20 | Fungible tokens, decimals, transfer, supply | core-erc20 |
| ERC721 | Non-fungible tokens, URI storage, minting | core-erc721 |
| ERC1155 | Multi-token (fungible + NFT), batch ops, safe transfer to contracts | core-erc1155 |
| ERC4626 | Tokenized vaults, shares vs assets, inflation attack mitigation | core-erc4626 |
| ERC6909 | Multi-asset (no batch/callbacks), granular approvals, extensions | core-erc6909 |
| ERC20 Supply | Creating supply with _mint and _update, fixed and reward patterns | core-erc20-supply |
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