Basic
- What's New in Vyper 0.4
- Hello World
- Data Types - Values
- Data Types - References
- Dynamic Arrays
- Constructor
- Private and Public State Variables
- Constants
- Immutable
- Function
- Internal and External Functions
- View and Pure Functions
- If Else
- For Loop
- Error
- Event
- Payable
- Default Function
- Send Ether
- Interface
- Raw Call
- Delegate Call
- Hash Function
- Verify Signature
- Re-entrancy Lock
- Create New Contract
- Self Destruct
- Imports
- Modules
- Unsafe Math
- Debug with Print
What's New
pragma version
0.3
# @version ^0.3.0
0.4
#pragma version ^0.4.0
Optimization mode
codesize, gas (default), or none
#pragma version ^0.4.0 optimize codesize
Constructor
0.3
@external
def __init__():
self.greet = "Hello World"
0.4
@deploy
def __init__():
self.greet = "Hello World"
For loop
0.3
for addr in addrs:
...
0.4
for addr: address in addrs:
...
Division
0.3
x / y
0.4
x // y
Constants
0.3
ZERO_ADDRESS
MAX_UINT256
EMPTY_BYTES32
0.4
empty(address)
max_value(uint256)
empty(bytes32)
Interface
static IFoo(addr).bar()
extcall IFoo(addr).bar()
Re-entrancy locks
0.3
@nonreentrant("lock")
0.4
@nonreentrant
Modules
See modules
Try on Smart Contract Engineer
