| Hello World | solidity | easy | app | free | ||
| Value Types | solidity | easy | variable | free | ||
| Function | solidity | easy | function | free | ||
| State Variables | solidity | easy | variable | |||
| Local Variables | solidity | easy | variable | |||
| Global Variables | solidity | easy | variable | |||
| View and Pure Functions | solidity | easy | function | |||
| Counter | solidity | easy | app | |||
| Default Values | solidity | easy | variable | |||
| Constants | solidity | easy | variable | |||
| If and Else | solidity | easy | control flow | |||
| For and While Loops | solidity | easy | control flow | |||
| Error Handling | solidity | easy | control flowerror | |||
| Function Modifier | solidity | easy | function | |||
| Constructor | solidity | easy | function | |||
| Ownable | solidity | easy | app | |||
| Function Outputs | solidity | medium | function | |||
| Array | solidity | medium | variable | |||
| Mapping | solidity | medium | variable | |||
| Structs | solidity | medium | variable | |||
| Enum | solidity | medium | variable | |||
| Data Locations | solidity | medium | variable | |||
| Simple Storage | solidity | medium | app | |||
| Todo List | solidity | medium | app | |||
| Iterable Mapping | solidity | medium | app | |||
| Array Shift | solidity | medium | app | |||
| Array Replace Last | solidity | medium | app | |||
| Events | solidity | medium | miscevent | |||
| Inheritance - Override | solidity | medium | inheritance | |||
| Multiple Inheritance | solidity | medium | inheritance | |||
| Calling Parent Constructors | solidity | medium | inheritance | |||
| Calling Parent Functions | solidity | medium | inheritance | |||
| Visibility | solidity | medium | inheritancefunction | |||
| Immutable | solidity | medium | variable | |||
| Payable | solidity | medium | payment | |||
| Fallback | solidity | medium | paymentfunction | |||
| Sending Ether | solidity | medium | payment | |||
| Ether Wallet | solidity | medium | app | |||
| Calling Other Contracts | solidity | medium | contract call | |||
| Interface | solidity | medium | contract call | |||
| Call | solidity | hard | contract callfunction | |||
| Delegatecall | solidity | hard | contract callfunction | |||
| New | solidity | medium | contract call | |||
| Library | solidity | medium | misclibrary | |||
| Hash Function | solidity | medium | cryptography | |||
| Verifying Signature | solidity | hard | cryptography | |||
| Access Control | solidity | medium | app | |||
| Deleting Contracts | solidity | hard | misc | |||
| Piggy Bank | solidity | hard | app | |||
| ERC20 | solidity | hard | app | free | ||
| Multi Sig Wallet | solidity | hard | app | free | ||
| Re-Entrancy | solidity | hard | security | free | ||
| Seven Eth | solidity | medium | security | |||
| King of Eth | solidity | medium | security | |||
| Wallet Hijack | solidity | hard | security | |||
| Misaligned Storage | solidity | hard | security | |||
| Bypass Contract Size | solidity | hard | security | |||
| Multi Token Bank | solidity | hard | security | |||
| ETH Flash Loan | solidity | hard | security | |||
| ERC20 Flash Loan | solidity | hard | security | |||
| Function Selector | solidity | medium | security | |||
| Dutch Auction | solidity | medium | app | |||
| English Auction | solidity | hard | app | |||
| ERC721 | solidity | hard | app | free | ||
| Reentrancy Guard | solidity | medium | security | |||
| Multi Call | solidity | hard | appcontract call | |||
| Create2 | solidity | medium | contract call | |||
| Signature Replay Attack | solidity | medium | securitycryptography | |||
| Hodl | solidity | medium | app | |||
| Crowd Fund | solidity | medium | app | |||
| Multi Delegatecall | solidity | hard | app | |||
| Function Selector Clash | solidity | hard | security | |||
| Time Lock | solidity | hard | app | |||
| Gas Golf | solidity | medium | miscgas | |||
| WETH | solidity | medium | defi | |||
| WETH Bank Hack | solidity | hard | securitycryptography | |||
| Vault | solidity | medium | defi | |||
| Constant Sum AMM | solidity | medium | defi | |||
| Constant Product AMM | solidity | hard | defi | |||
| Staking Rewards | solidity | hard | defi | |||
| Debug with Hardhat | solidity | easy | miscdebug | |||
| Bitwise Operators | solidity | medium | miscbitwise | |||
| Most Significant Bit | solidity | medium | algorithmbitwise | |||
| Discrete Staking Rewards | solidity | hard | defi | |||
| Unchecked Math | solidity | easy | miscmath | |||
| Simple Bytecode Contract | solidity | hard | misc | |||
| Custom Error | solidity | easy | error | |||
| Fallback Input and Output | solidity | medium | fallback | |||
| Write to Any Slot | solidity | hard | miscassemblyvariable | |||
| Transparent Upgradeable Proxy | solidity | hard | app | |||
| Hello World | vyper | easy | app | free | ||
| Data Types - Values | vyper | easy | variable | free | ||
| Data Types - References | vyper | easy | variable | free | ||
| Function Intro | vyper | easy | function | free | ||
| Internal and External Functions | vyper | easy | function | free | ||
| View and Pure Functions | vyper | easy | function | free | ||
| Constructor | vyper | easy | function | free | ||
| Private and Public State Variables | vyper | easy | variable | free | ||
| Constants | vyper | easy | variable | free | ||
| If Else | vyper | easy | control flow | free | ||
| For Loop | vyper | easy | control flow | free | ||
| Error | vyper | easy | control flowerror | free | ||
| Event | vyper | easy | miscevent | free | ||
| Payable | vyper | medium | payment | free | ||
| Default Function | vyper | medium | paymentfunction | free | ||
| Send Ether | vyper | medium | payment | free | ||
| Raw Call | vyper | hard | contract callfunction | free | ||
| Delegate Call | vyper | hard | contract callfunction | free | ||
| Interface | vyper | medium | contract call | free | ||
| Hash Function | vyper | medium | cryptography | free | ||
| Verify Signature | vyper | hard | cryptography | free | ||
| Create Forwarder To | vyper | hard | contract call | free | ||
| Re-entrancy Lock | vyper | hard | security | free | ||
| Self Destruct | vyper | medium | misc | free | ||
| Hello CTF | vyper | medium | security | free | ||
| Forgot Access Control | vyper | medium | security | free | ||
| Drain Wallet | vyper | medium | security | free | ||
| Immutable | vyper | easy | variable | free | ||
| Dynamic Arrays | vyper | medium | variable | free | ||
| ERC20 | vyper | medium | app | |||
| Debug with Print | vyper | easy | miscdebug | |||
| Uniswap V2 Single Hop Swap | solidity | medium | defiuniswap-v2mainnet | |||
| Uniswap V2 Multi Hop Swap | solidity | medium | defiuniswap-v2mainnet | |||
| Uniswap V2 Add and Remove Liquidity | solidity | medium | defiuniswap-v2mainnet | |||
| Uniswap V2 Flash Swap | solidity | medium | defiuniswap-v2mainnet | |||
| Uniswap V3 Single Hop Swap | solidity | medium | defiuniswap-v3mainnet | |||
| Uniswap V3 Multi Hop Swap | solidity | medium | defiuniswap-v3mainnet | |||
| Uniswap V3 Liquidity | solidity | medium | defiuniswap-v3mainnet | |||
| Uniswap V3 Flash | solidity | medium | defiuniswap-v3mainnet | |||
| Uniswap V3 Flash Swap Arbitrage | solidity | hard | defiuniswap-v3mainnet | |||
| Curve Stable Swap | vyper | hard | deficurvemainnet | |||
| Curve Add and Remove Liquidity | vyper | hard | deficurvemainnet | |||
| Chainlink Price Oracle | solidity | medium | defichainlinkmainnet |