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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.

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Signature

pub fn is_eth_signature_valid(
    msg_hash: u256, signature: Signature, eth_address: EthAddress,
) -> Result

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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

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Returns

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

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Examples

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());
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