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start_roll

fn start_roll(block_number: felt252, target_contract_address: felt252) -> Result::<(), felt252> nopanic;

Sets a block number for a deployed contract, until stop_roll is called.

  • block_number - the new block number
  • target_contract_address - address of the deployed contract, for which the block number will be set.
note

The default block_number value in tests is set to -1 for every contract.

Usage example​

Tested contract​

simple contract
#[contract]
mod MinimalContract {
    use starknet::info::get_block_info;
    use box::BoxTrait;

    #[view]
    fn check_block_number() -> u64 {
        get_block_info().unbox().block_number
    }
}

Test file​

Example test
use array::ArrayTrait;
use result::ResultTrait;

#[test]
fn test_start_roll() {
    let deployed_contract_address = deploy_contract('simple', @ArrayTrait::new()).unwrap();
    assert(deployed_contract_address != 0, 'deployed_contract_address != 0');

    let result = call(deployed_contract_address, 'check_block_number', @ArrayTrait::new()).unwrap();
    assert(*result.at(0_u32) == -1, *result.at(0_u32));

    start_roll(100, deployed_contract_address);
    let result = call(deployed_contract_address, 'check_block_number', @ArrayTrait::new()).unwrap();
    assert(*result.at(0_u32) == 100, *result.at(0_u32));
}