Solana: How to directly verify ed25519 signatures in a contract
Februari 9, 2025 | by Gusri Efendi
ED25519 Signature of Direct Solana Contract
As Blockchain developers, we often face the challenge of integrating several signature mechanisms into our contracts. One of these mechanisms are ED25519, which provides safe and effective digital firms that use the function of the cryptographic bag and private key. Although there are existing solutions that allow it to indirectly verify the signatures ED25519, the signature manual and the call instructions in an operation can be difficult.
In this article, we will examine an alternative approach to signatures ED25519 directly verified in the Solana contract.
Problem
Before immersing ourselves in the decision, we pay attention to some common concerns:
* Operation size : The direct signatures of ED25519 require a significant amount of storage space. When presenting the instructions of the firm and the call instruction to an operation, we run the risk of exceeding the maximum surgery limit.
* Activities Activities : An inspection of each signature separately can introduce an additional delay that can be unacceptable for high frequency or real time commercial programs.
Solution
To solve these problems, we will install a personalized solution that uses the instructions to “verify” the signatures ED25519 directly. This approach requires careful consideration of the following aspects:
Firm verification feature
In our contract, we will create a special characteristic that will verify the signatures of ED25519. This feature will provide a signature input and a bag storage bag as an argument.
`Sol
Pragma solidity ^0.8.0;
The deceased of the signing of the contract {
// ... (other variables)
The function has been tested in 25519Signatur (
Bytes32 _signature,
Address _from,
Bytes memory _storragehash,
UINT256 _GASLIMIT
) Public Image Return (Bool) {
// Verify the firm with ED25519
Requires ed25519verify (_signature, _from, _storagehash, _gaulimit);
return the truth;
}
}
ED25519 Library Integration
We will use the Solana-Verify library to perform the real inspection. This library provides a high level interface to verify signatures with ED25519.
Solidarity
Pragma solidity ^0.8.0;
SOLANAVERIFY LIBRARY {
Confirmed function (Uint256 _Hash) internal image returns (Bool);
}
The deceased of the signing of the contract {
using Solanaverify.sol (Solanaverify);
// ... (other variables)
The function has been tested in 25519Signatur (
Bytes32 _signature,
Address _from,
By _ sortagehash memory
) Public Image Return (Bool) {
Refund verification (_signature, _from, _storagehash);
}
}
Transaction structure
To avoid the maximum transaction limit that exceeds, we will systematize our contract as follows:
Solidarity
Pragma solidity ^0.8.0;
The deceased of the signing of the contract {
// ... (other variables)
Bytes32 public signature;
appeal to the public;
Baites memory storage;
Functions for Setsignature (bytes32 _signature) in public {
Requires Ed25519verify (_Signature, from, Storagehash, 100000); // 100k gas
signature = _signature;
From = address (...);
Storagehash = _storagehash;
}
The function has been tested in 25519Signatur (
Bytes32 _signature,
Address _from,
By _ sortagehash memory
) Public Image Return (Bool) {
Requires Ed25519verify (_signature, _from, _storagehash, 100000); // 100k gas
return the truth;
}
}
Example use
To use this solution, create a new contract and amount to the signatureverifier contract.
` Sol
Pragma solidity ^0.8.
RELATED POSTS
View all
Ethereum: Why is difficulty measured in a hash’s leading zeroes?
Februari 7, 2025 | by Gusri Efendi
Bitcoin: Is the scriptSig spending an PayToAnchor output expected to always be empty?
Februari 8, 2025 | by Gusri Efendi