> ## Documentation Index
> Fetch the complete documentation index at: https://docs.starknet.io/llms.txt
> Use this file to discover all available pages before exploring further.

# core::starknet::eth_signature::is_eth_signature_valid

Validates an Ethereum signature against a message hash and Ethereum address.
Similar to `verify_eth_signature` but returns a `Result` instead of panicking.
Also verifies that `r` and `s` components of the signature are in the range `[1, N)`,
where N is the size of the curve.

## Signature

```rust theme={null}
pub fn is_eth_signature_valid(
    msg_hash: u256, signature: Signature, eth_address: EthAddress,
) -> Result
```

#### Arguments

* `msg_hash` - The 32-byte hash of the message that was signed
* `signature` - The Ethereum signature containing `r`, `s` components and `y_parity`
* `eth_address` - The expected Ethereum address of the signer

#### Returns

Returns `Ok(())` if the signature is valid, or `Err(felt252)` containing an error message if
invalid.

## Examples

```rust theme={null}
use starknet::eth_address::EthAddress;
use starknet::eth_signature::is_eth_signature_valid;
use starknet::secp256_trait::Signature;

let msg_hash = 0xe888fbb4cf9ae6254f19ba12e6d9af54788f195a6f509ca3e934f78d7a71dd85;
let r = 0x4c8e4fbc1fbb1dece52185e532812c4f7a5f81cf3ee10044320a0d03b62d3e9a;
let s = 0x4ac5e5c0c0e8a4871583cc131f35fb49c2b7f60e6a8b84965830658f08f7410c;
let y_parity = true;
let eth_address: EthAddress = 0x767410c1bb448978bd42b984d7de5970bcaf5c43_u256
    .try_into()
    .unwrap();
assert!(is_eth_signature_valid(msg_hash, Signature { r, s, y_parity }, eth_address).is_ok());
```