Access to ECDSA sign inside Runtime

Question

Is there any way to access to ECDSA capabilities (like sign) inside the Runtime?

I need to create benchmarks where the parameter of one extrinsic needs to be signed using ECDSA. I could create some 'hosted-functions' to do that, but I think it should be already done for each crypto schema (ed25519, sr25519, and ecdsa).

Answer 1

yes you can sign some data for your benchmarking code. In sp-io there is the function crypto::ecdsa_sign. You can use crypto::ecdsa_generate to generate you some public/private key to use for signing.

BTW: All of the things I mentioned above are also available through the RuntimePublic trait.

So, your code using this trait would look like this:

use sp_application_crypto::ecdsa::Public;

let public = Public::generate_pair(sp_core::testing::ECDSA, None);
public.sign(sp_core::testing::ECDSA, "my message").unwrap();

While sp_core::testing::ECDSA being the KeyTypeId. If you already have a custom KeyTypeId for your application, you can use this.