testing the transfer transfer in Ethereum: Rust error
As part of the development process, it is necessary to thoroughly test our intelligent contracts to make sure that they behave as expected. In this article, we will examine how to test an ether transfer transfer transfer using rust and reliability code combination.
Understanding the transfer transfer
Transfer overflow occurs when the transferred value exceeds the maximum allowed transaction amount (usually 20 million ether). This can lead to unpredictable behavior, incorrect logic of intelligent agreement and even failures. In this example, we will test the “deposit” function, which is responsible for depositing the ether and mental tokens to the sender.
Rust Code
`Rust
// test package for overflowing transfers in Ethereum
Use STD :: Conwer :: Tryfrm;
Use Ethermint :: conct :: {account, balance};
Use Etherswitch :: contract :: contract;
const eip712_domain_name: & p. = "Ethereum Domain";
Const eip712_TOKEN_TYPE: & Str = "Ethereum type type";
Struct transferoverflowerror {
Reason: string,
}
Introduce with
FN Z (S: String) -> Self {
Transferoverflowerror {reason: s}
}
}
#[test]
fn test_transfer_oveflow () {
// initiate a contract
Let Contract = Contract :: New ("0x ..."). breakdown ();
// deposit the ether and mint tokens to the sender
contract.deposit (
"0x ...". To_string (),
"0x ...". To_string (),
EIP712_DOMAIN_NAME.TO_STRING (),
EIP712_TOKEN_TYPE.TO_STRING (),
100_000_000.into (),
)
.expect („Nie udało się zdeponować tokenów eterowych i miętowych”);
// Transfer overflow test
Let Balance = Account :: Z (1) .Nwrap ();
Assert! (Balance.balance ()> 20_000_000);
// try to deposit more ether than allowed for that
contract.deposit (
"0x ...". To_string (),
"0x ...". To_string (),
EIP712_DOMAIN_NAME.TO_STRING (),
EIP712_TOKEN_TYPE.TO_STRING (),
200_000_000.into (),
)
.expect („Nie udało się zdeponować więcej eteru”);
// Transfer overflow test
Assert! (Balance.balance ()> 20_000_000);
// Try mint tokens with excessive token
contract. Mint (
"0x ...". To_string (),
EIP712_DOMAIN_NAME.TO_STRING (),
EIP712_TOKEN_TYPE.TO_STRING (),
100_000_000.into (),
)
.expect („Nie udało się miętowego tokeny”);
// Transfer overflow test
Assert! (Balance.balance ()> 20_000_000);
}
Explanation
In this test apartment:
- Initiate a contract using “Agreement :: New”.
- Deposter the ether and mint tokens to the sender.
- Attempt to deposit more ether than allowed (
200_000_000) and check if the balance exceeds the maximum value.
4
testing when paranoid use
To test the case of paranoid use, we can add additional claims to make sure:
- The deposit function properly supports the overflow conditions.
2
Taking into account these controls, we can confirm the reliability of our contract and prevent unexpected behavior.
Application
Testing overflow of transfer is a key aspect of ensuring integrity and reliability of intelligent Ethereum agreements. Using rust to write tests and solidity code to implement the logic of the contract, we can effectively test the cases of paranoid use, such as overflow conditions.
