Function signMessage

signMessage(message, privateKey): Ed25519SignatureHex
Function to sign a message with a private key.
Parameters
- message: Core.HexBlob
  The message to sign.
- privateKey: Ed25519PrivateNormalKeyHex | Ed25519PrivateExtendedKeyHex
  The private key to sign the message with.
Returns Ed25519SignatureHex
The signature of the message.
- Defined in packages/blaze-core/src/util.ts:154