Ethereum: What is the case of Hash use in the EIP-712?
The proposal Ethereum (EIP) 712 Improvements, also known as Keccak-512, is a function of a cryptographic shortcut for signing messages. In reliability, one of the most popular programming languages to build decentralized applications on Blockchain Ethereum, we can use this function to create solid and safe signature mechanisms. This article falls in case of using a type in the EIP-712.
What is a type of hash?
The Hash type, also known as Keccaak-512 or Simple K256, is a cryptographic function that adopts the string (in this case the contract name) and produces a constant dimension. Basically, this is the shortening of the SH-3-512, with the 32-length output.
EIP-712: key concept
The EIP-712 proposal introduced an additional field of contracts using Keccaak-512 signatures. This field is called “type” or “label”, which contains additional information about the contract. This is not related to the position of abbreviation itself, but it serves as a way to ensure the context and metadata regarding the contract.
Using case: Hashes to EIP-712
The Hiszki type plays a key role in the EIP-712, serving for many purposes:
- Contractual metadata : The type of hash is used to identify the contract during performance. When the account causes a function in this contract, it can check if it performs the code in this particular contract using the Keccak-512 signature.
`Solidity
MyContract contract {
Bytes32 Private State My_Type_hash = KECCAK256 ("MyContract");
// contractual metadata are stored here
}
- Proof of existence
: The type of hash can be used to prove that the contract exists on blockchain during performance, which makes it safer and less sensitive to elimination.
Solidity
MyContract contract {
Bytes32 Private State My_Type_hash = KECCAK256 ("MyContract");
// contractual metadata are stored here
}
- Audit
: The type of hash can be used to control contracts to meet some standards or regulations, which makes it easier to identify potential problems.
Solidity
MyContract contract {
Bytes32 Private State My_Type_hash = KECCAK256 ("MyContract");
Audit function () public {
requires (byte32 (0) == keccak256 ("mycontract"), "the contract is not valid");
}
}
- Security : The Hashas type can be used to add an additional layer of safety security for contracts, preventing the attacker from reverse contractual engineering.
Solidity
MyContract contract {
Bytes32 Private State My_Type_hash = KECCAK256 ("MyContract");
Myfunction () public function {
// code here
}
}
`
In conclusion, the type of hasze in the EIP-712 is a powerful tool that can be used to increase the safety, control and management of contracts. By storing an additional context and information on contracts using Keccaak-512 signatures, programmers can create more solid and safer decentralized applications.
It should be mentioned, however, that, although the Heshes type offers these benefits, they also introduce additional requirements for the development and implementation of contracts. Therefore, before their implementation, the exact evaluation of the use of the EIP-712 in a specific project is crucial.