contract

tempo_precompiles_macros

Attribute Macro contract 

Source 
#[contract]
Expand description

Transforms a struct that represents a storage layout into a contract with helper methods to easily interact with the EVM storage. Its packing and encoding schemes aim to be an exact representation of the storage model used by Solidity.

§Input: Storage Layout

ⓘ
#[contract]
pub struct TIP20Token {
    pub name: String,
    pub symbol: String,
    total_supply: U256,
    #[slot(10)]
    pub balances: Mapping<Address, U256>,
    #[slot(11)]
    pub allowances: Mapping<Address, Mapping<Address, U256>>,
}

§Output: Contract with accessible storage via getter and setter methods.

The macro generates:

  1. Transformed struct with generic parameters and runtime fields
  2. Constructor: _new(address, storage)
  3. Type-safe (private) getter and setter methods

§Requirements

  • No duplicate slot assignments
  • Unique field names, excluding the reserved ones: address, storage, msg_sender.
  • All field types must implement Storable, and mapping keys must implement StorageKey.