| Hello World |   solidityeasyapp | free |
| Value Types | solidityeasyvariable | free |
| Function | solidityeasyfunction | free |
| State Variables | solidityeasyvariable | |
| Local Variables | solidityeasyvariable | |
| Global Variables | solidityeasyvariable | |
| View and Pure Functions | solidityeasyfunction | |
| Counter | solidityeasyapp | |
| Default Values | solidityeasyvariable | |
| Constants | solidityeasyvariable | |
| If and Else | solidityeasycontrol flow | |
| For and While Loops | solidityeasycontrol flow | |
| Error Handling | solidityeasycontrol flowerror | |
| Function Modifier | solidityeasyfunction | |
| Constructor | solidityeasyfunction | |
| Ownable | solidityeasyapp | |
| Function Outputs and Destructuring Assignment | soliditymediumfunction | |
| Array | soliditymediumvariable | |
| Mapping | soliditymediumvariable | |
| Structs | soliditymediumvariable | |
| Enum | soliditymediumvariable | |
| Data Locations | soliditymediumvariable | |
| Simple Storage | soliditymediumapp | |
| Todo List | soliditymediumapp | |
| Iterable Mapping | soliditymediumapp | |
| Array Shift | soliditymediumapp | |
| Array Replace Last | soliditymediumapp | |
| Events | soliditymediummiscevent | |
| Inheritance - Override | soliditymediuminheritance | |
| Multiple Inheritance | soliditymediuminheritance | |
| Calling Parent Constructors | soliditymediuminheritance | |
| Calling Parent Functions | soliditymediuminheritance | |
| Visibility | soliditymediuminheritancefunction | |
| Immutable | soliditymediumvariable | |
| Payable | soliditymediumpayment | |
| Fallback | soliditymediumpaymentfunction | |
| Sending Ether | soliditymediumpayment | |
| Ether Wallet | soliditymediumapp | |
| Calling Other Contracts | soliditymediumcontract call | |
| Interface | soliditymediumcontract call | |
| Call | solidityhardcontract callfunction | |
| Delegatecall | solidityhardcontract callfunction | |
| New | soliditymediumcontract call | |
| Library | soliditymediummisclibrary | |
| Hash Function | soliditymediumcryptography | |
| Verifying Signature | solidityhardcryptography | |
| Access Control | soliditymediumapp | |
| Deleting Contracts | solidityhardmisc | |
| Piggy Bank | solidityhardapp | |
| ERC20 | solidityhardapp | free |
| Multi Sig Wallet | solidityhardapp | free |
| Re-Entrancy | solidityhardsecurity | free |
| Seven Eth | soliditymediumsecurity | |
| King of Eth | soliditymediumsecurity | |
| Wallet Hijack | solidityhardsecurity | |
| Misaligned Storage | solidityhardsecurity | |
| Bypass Contract Size | solidityhardsecurity | |
| Multi Token Bank | solidityhardsecurity | |
| ETH Flash Loan | solidityhardsecurity | |
| ERC20 Flash Loan | solidityhardsecurity | |
| Function Selector | soliditymediumsecurity | |
| Dutch Auction | soliditymediumapp | |
| English Auction | solidityhardapp | |
| ERC721 | solidityhardapp | free |
| Reentrancy Guard | soliditymediumsecurity | |
| Multi Call | solidityhardappcontract call | |
| Create2 | soliditymediumcontract call | |
| Signature Replay Attack | soliditymediumsecuritycryptography | |
| Hodl | soliditymediumapp | |
| Crowd Fund | soliditymediumapp | |
| Multi Delegatecall | solidityhardapp | |
| Function Selector Clash | solidityhardsecurity | |
| Time Lock | solidityhardapp | |
| Gas Golf | soliditymediummiscgas | |
| WETH | soliditymediumdefi | |
| WETH Bank Hack | solidityhardsecuritycryptography | |
| Vault | soliditymediumdefi | |
| Constant Sum AMM | soliditymediumdefi | |
| Constant Product AMM | solidityharddefi | |
| Staking Rewards | solidityharddefi | |
| Debug with Hardhat | solidityeasymiscdebug | |
| Hello World | vypereasyapp | free |
| Data Types - Values | vypereasyvariable | free |
| Data Types - References | vypereasyvariable | free |
| Function Intro | vypereasyfunction | free |
| Internal and External Functions | vypereasyfunction | free |
| View and Pure Functions | vypereasyfunction | free |
| Constructor | vypereasyfunction | free |
| Private and Public State Variables | vypereasyvariable | free |
| Constants | vypereasyvariable | free |
| If Else | vypereasycontrol flow | free |
| For Loop | vypereasycontrol flow | free |
| Error | vypereasycontrol flowerror | free |
| Event | vypereasymiscevent | free |
| Payable | vypermediumpayment | free |
| Default Function | vypermediumpaymentfunction | free |
| Send Ether | vypermediumpayment | free |
| Raw Call | vyperhardcontract callfunction | free |
| Delegate Call | vyperhardcontract callfunction | free |
| Interface | vypermediumcontract call | free |
| Hash Function | vypermediumcryptography | free |
| Verify Signature | vyperhardcryptography | free |
| Create Forwarder To | vyperhardcontract call | free |
| Re-entrancy Lock | vyperhardsecurity | free |
| Self Destruct | vypermediummisc | free |
| Hello CTF | vypermediumsecurity | free |
| Forgot Access Control | vypermediumsecurity | free |
| Drain Wallet | vypermediumsecurity | free |
| Immutable | vypereasyvariable | free |
| Dynamic Arrays | vypermediumvariable | free |