Ethereum: What is the case of using hash in EIP-712?
The proposal to improve Ethereum (EIP) 712, also known as the Keccak-512, is a cryptographic hash function designed to be used to sign messages. In solidarity, one of the most popular programming languages for the construction of decentralized Ethereum blockchain applications, we can use this feature to create stable and secure signature mechanisms. This article will deepen in the case of the use of the type of hashs in the EIP-712.
What is a hash type?
The type of hash, also known as KECCAK-512 or just K256, is a cryptographic hash function that takes a string (in this case, the name of the contract) and produces a fixed size grinding. In essence, this is the Sha-3-512 hash, the output is 32 bytes long.
EIP-712: A key concept
The EIP-712 proposal introduced an additional field to contracts using Keccak-512 signatures. This field is called “type” or “tag”, which contains additional information about the contract. This is not related to the function of the hash, but serves as a way to ensure context and metadata for the contract.
Use case: Enter hashs in EIP-712
The type of hash play a crucial role in the EIP-712, serving several goals:
- Metadata Contract
: The type of hash is used to identify the contract during performance. When an account calls a function of this contract, it can verify that they execute a code of this particular contract using the KECCAK-512 signature.
`Solidness
Contract MyContract {
Bytes32 Private constant my_type_hash = keccak256 (“MyContrac”);
// Metadanne contract is stored here
}
`
- Proof of existence : The type of type hash can be used to prove that blockchain by blockchain during performance, which makes it more secure and less predisposed to deletion.
`Solidness
Contract MyContract {
Bytes32 Private constant my_type_hash = keccak256 (“MyContrac”);
// The Metadanna Contract is stored here
}
`
- Audit
: The type of hash can be used to audit contracts for compliance with certain standards or regulations, which facilitates the identification of potential problems.
`Solidness
Contract MyContract {
Bytes32 Private constant my_type_hash = keccak256 (“MyContrac”);
Audit function () publicly {
Require (bytes32 (0) == keccak256 (“MyContract”), “The contract is not valid”);
}
}
`
- Security : The type of hash can be used to add an additional security layer to the contracts, making it difficult for the attackers to reimburse the contract.
`Solidness
Contract MyContract {
Bytes32 Private constant my_type_hash = keccak256 (“MyContrac”);
Myfunction function () Public {
// Code here
}
}
`
In conclusion, the type of hash in the EIP-712 is a powerful tool that can be used to improve security, audit and management of contract metadata. By storing additional context and contract information using Keccak-512 signatures, developers can create healthier and more secure decentralized applications.
It is essential to note that while the type of hash provides these advantages, they also introduce additional complexity and requirements for the development and implementation of contracts. It is therefore essential to carefully evaluate the case of using the EIP-712 in your specific project before applying them.
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