Ethereum: Verifying eth_call Results with Cryptographic Proofs for L1s and L2s
- 2025-02
- by Cn Vn
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Verifying eth_call results with cryptographic proofs for l1s and l2s
Network, Curently
In this article, we will explore how cryptographic proofs can
Understanding Ethereum’s L1 and L2 Networks
Before diving into the world of cryptography, it is essential to understand the two primary layers that make up the Ethereum Network:
* Layer 1 (L1)
: The L1 Network is decentralized, meaning there are no intermediaries, and all transactions are recorded on a public ledger called the Block Explorer.
* Layer 2 (l2) : It Enables Faster Transaction Processing Times, Lower Fees, and Improved Scalability. The l2 network is also decentralized.
The problem with unverified data
When using eth_call requests to access smart contracts on the L1 Network, there are several potential issues that can arise:
* Tampering data : a malicious actor could potentially tamper with the returned data from an eth_call request.
* Lack of authentication
:
Using Cryptographic Proofs for Verification
To address these issues, cryptographic proofs can be used to verify the results of eth_call requests on both l1 and l2 networks. Here are some ways you can implement this:
L1 Network
Using Web3.js With Json-Ld and Graphql
Web3.js is a popular javascript library that enables interaction with the Ethereum blockchain. Data (JavaScript Object Notation for Linked Data) and Graphql,
`JavaScript
// Import Required Libraries
Const Web3 = Require (‚Web3‘);
Const jsonld = Require (‚Json-LD‘);
// Set Up Your Ethereum Node or Service
Const Web3 = New Web3 (New Web3.providers.httpprovider (‚
// Define a function to execute an eth_call request with json-ld and graphql
Async Function Executeethcall (Request) {
// Create a graphql query using the json-LD Library
Const Schema = New Graphqlschema ({
Typedefs: [
{
Type: ‚Query‘,
Args: {
Contracttadarress: {Type: ‚String‘},
ContractFunctionName: {Type: ‚String‘}
},
Resolve: Async (Parent, Args) => {
// execute the eth_call request
Const Result = Await Web3.eth.call ({
To: Args.ContractAddaddress,
Data: Args.ContractFunctionName,
from: ‚0xyour_project_id‘
});
Return Json.Parse (Result);
}
}
]
});
// Use Graphql’s Executequery Method to execute the query
Const response = Await schema.executequery ({
Query: {
Query:
query {
CONTRACTS: $ {ARGS.CONTACTAdDS}
CONTRACTFUNCTIONNAME: $ {ARGS.CONTRACTFUNCTIONNAME}
}
,
Variables: Args
}
});
Return Json.Parse (response.data);
}
// Example usage:
Const request = {CONTRACTS: ‚0xyour_contract_address‘, ContractFunctionName: ‚MyContractFunction‘};
executeethcall (request) .then ((result) => console.