Function fnDsaSign

fnDsaSign(
    level: FnDsaLevel,
    secretKeyHex: string,
    messageHex: string,
): FnDsaSignResult
Sign a message with FN-DSA.
Parameters
- level: FnDsaLevel
  Security level: 512 or 1024.
- secretKeyHex: string
  Hex-encoded secret key.
- messageHex: string
  Hex-encoded message to sign.
Returns FnDsaSignResult
Signature result with hex-encoded signature.
Example
```
const kp = fnDsaKeygen(512);
const msg = Buffer.from("hello").toString("hex");
const sig = fnDsaSign(512, kp.secretKey, msg);
console.log(sig.signature);  // hex string
```
- Defined in modern/fn-dsa.ts:162