- Access Restriction - restricts access to a function (e.g: access permissions)
- Check Effect Interactions - reduces risks of re-entrancy attacks after external calls of a function
- Guard Check - validates the function behaviour to unexpected inputs
- Pull Over Push - shift the risk associated with transferring ether to addresses
- Emergency Stop - disable contract functionalities in case of emergency
- State Machine - set stages where the contract functionality behaves differently
- Commit Reveal - have confidentiality of data within a period of time (e.g: voting)
- Randomness - generate a psuedo random number within the blockchain
- Oracles - use of external data outside of blockchain from trusted sources (e.g: weather forecast)
- Contract Self Destruction - remove the contract permanently from the blockchain
- Contract Factory - a parent contract can create its children contracts
- Name Registry - keep track of all other dependency contracts within a single contract
- Proxy Delegation - upgrade the logic of a smart contract without redeploying the original contract
- Eternal Storage - keep track all the data of a contract after upgrades used with proxy delegation pattern
Example implementation are developed with 0.4.24 solidity version. Clone the contracts from this repo and try them out in remix.
$ git clone https://github.com/blockdevsasia/ethereum-design-patterns.git| Pattern | Remarks |
|---|---|
| Security Pattern | Inside [Security-Patterns] Branch. Read Instructions |
| Commit-Reveal | Inside [Behavioral-Patterns] Branch. Read Instructions |
| Random-Oraclize | Inside [Behavioral-Patterns] Branch. Read Instructions |
| State-Machine | Inside [Behavioral-Patterns] Branch. Read Instructions |
| Factory-Registry | Inside [Architectural-Patterns] Branch. Read Instructions |
| Proxy Delegation-Eternal Storage | Inside [Architectural-Patterns] Branch. Read Instructions |
- Consensys Ethereum Developer Training
- Blockchain Institute of UnionBank